Large-temperature-difference energy storage heating system and method based on solar full-spectrum utilization

Abstract

The application provides a large-temperature-difference energy storage heating system and a heating method based on solar full-spectrum utilization, and belongs to the field of solar heating. In order to solve the problems of low solar energy utilization rate, small temperature difference of heat storage medium, less energy storage and resource waste, and difficulty in guaranteeing heating due to the instability and low energy flow density of solar energy, the application comprises a solar light concentration and frequency utilization photovoltaic power generation and heat collection system, a large-temperature-difference energy storage subsystem and a compression-ejection coupled heat pump subsystem. The solar light concentration and frequency utilization photovoltaic power generation and heat collection subsystem generates electric energy and heats the circulating medium in the heat collection pipe, and stores the surplus electric energy. The large-temperature-difference energy storage subsystem utilizes the heat of the heat conduction medium in stages, including secondary heating and tertiary heating. The temperature difference of the heat conduction medium can be greatly enlarged, and the energy storage density is improved. The high-temperature section drives the ejection heat pump, the medium-temperature section directly exchanges heat, and the low-temperature section realizes photovoltaic power storage heat pump combined heating, so that the heating guarantee is improved.

Description

Technical Field

[0001] This invention relates to the field of solar heating technology, and more specifically, to a large temperature difference energy storage heating system and heating method based on the full spectrum utilization of solar energy. Background Technology

[0002] As the scale of civil and public buildings in my country continues to expand, the demand for heating in winter continues to increase. However, the extensive use of carbon-containing substances such as coal, oil, and natural gas as fuel has caused serious environmental problems and a shortage of fossil energy.

[0003] Solar energy, as a renewable energy source with abundant reserves and wide distribution, and a clean energy source that does not produce greenhouse gases or air pollution, has become an energy option with enormous potential. However, due to the inherent instability and low energy flux density of solar energy, achieving efficient utilization of solar energy requires considering the characteristics of the energy itself. This necessitates combining technologies such as concentrating solar power, thermoelectric frequency division, large temperature difference energy storage, and heat pumps, and implementing a three-stage combined heating system of high, medium, and low temperatures. This approach aims to achieve tiered and efficient utilization of solar energy while improving the reliability of heating supply.

[0004] Existing parabolic trough concentrating solar collectors utilize thermal oil for energy storage. Thermal oil energy storage systems are simple, low-cost, and exhibit good thermal stability and corrosion resistance. However, since thermal oil energy storage is a sensible heat storage method—a process of storing heat energy in a substance through temperature changes—unlike latent heat storage, it does not involve phase change processes and relies solely on temperature changes to store and release heat energy. Therefore, it is significantly limited by temperature differences, resulting in a limited heat storage capacity. For the same thermal storage medium, mass Under certain conditions, temperature difference The larger the size, the more heat it can store. The larger the temperature difference, the better. For example, if the upper limit temperature of the heat transfer oil after heat collection is set at 150 degrees Celsius, but the heat transfer only affects the drive of the jet heat pump, the outlet temperature of the heat transfer oil after heat exchange will inevitably be very high, for example, not lower than 100 degrees Celsius. A temperature of only 50 degrees Celsius is relatively small, which is not conducive to heat storage in the entire heat transfer oil system and will also lead to resource waste. Therefore, how to achieve large temperature difference energy storage, improve the energy storage density of heat transfer oil, and reduce energy consumption is a problem worth exploring. Summary of the Invention

[0005] The technical problem to be solved by this invention is:

[0006] To address the problems of low solar energy utilization due to its inherent instability and low energy flux density, as well as insufficient energy storage and resource waste caused by small temperature differences in the heat storage medium, making it difficult to guarantee heating supply.

[0007] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows:

[0008] This invention provides a large temperature difference energy storage heating system based on the full spectrum utilization of solar energy, including a trough collector, photovoltaic panels, a frequency divider, collector tubes, a first oil circulation pump, a generator, a first heat storage tank, a second oil circulation pump, a heat exchanger, a second heat storage tank, a third oil circulation pump, a third heat storage tank, an energy storage converter, an ejector, a compressor, a condenser, a liquid storage tank, a throttling valve, an evaporator, a refrigerant circulation pump, a first regulating valve, a second regulating valve, a third regulating valve, a fourth regulating valve, a fifth regulating valve, and a sixth regulating valve.

[0009] The oil outlet of the heat collector tube is connected to the oil inlet of the first oil circulation pump. The oil outlet of the first oil circulation pump is connected to the oil inlet of the generator. The oil outlet of the generator is connected to the oil inlet of the first heat storage tank. The oil outlet of the first heat storage tank is connected to the oil inlet of the second oil circulation pump. A sixth regulating valve is installed on the oil outlet pipe of the first heat storage tank. The oil outlet of the second oil circulation pump is connected to the oil inlet of the heat exchanger. The oil outlet of the heat exchanger is connected to the oil inlet of the second heat storage tank. A fifth regulating valve is installed on the oil outlet pipe of the heat exchanger. The oil outlet of the second heat storage tank is connected to the oil inlet of the third oil circulation pump. The oil outlet of the third oil circulation pump is connected to the oil inlet of the evaporator. The oil outlet of the evaporator is connected to the oil inlet of the third heat storage tank. The oil outlet of the third heat storage tank is connected to the oil inlet of the heat collector tube.

[0010] The generator's outlet is connected to the ejector's high-pressure inlet. The evaporator's outlet is connected to both the ejector's low-pressure inlet and the compressor's inlet. A second regulating valve is installed on the ejector's low-pressure inlet pipe, and a fourth regulating valve is installed on the compressor's inlet pipe. The compressor's outlet and the ejector's outlet merge and connect to the condenser's inlet. A third regulating valve is installed on the compressor's outlet pipe, and a first regulating valve is installed on the ejector's outlet pipe. The condenser's outlet is connected to the receiver's inlet. The receiver's outlet is connected to both the expansion valve's inlet and the refrigerant circulation pump's inlet. The expansion valve's outlet is connected to the evaporator's inlet, and the refrigerant circulation pump's outlet is connected to the generator's inlet.

[0011] Both the heat exchanger and the condenser are equipped with an inlet and an outlet on the other side.

[0012] The number of parabolic trough collectors is at least one. When the number of parabolic trough collectors is at least two, the parabolic trough collectors are evenly distributed. Each parabolic trough collector is equipped with a heat collection tube. Multiple heat collection tubes are connected in series. At least one parabolic trough collector is connected to a photovoltaic panel. The photovoltaic panel is connected to an energy storage converter. The energy storage converter is connected to a compressor, a first oil circulation pump, a second oil circulation pump, a third oil circulation pump, and a refrigerant circulation pump.

[0013] A heating method based on a large temperature difference energy storage heating system utilizing the full spectrum of solar energy, including two-stage heating and three-stage heating.

[0014] Furthermore, in the case of secondary heating, in the initial state, the first heat storage tank contains 0 parts of heat transfer oil, the second heat storage tank contains 2 parts of heat transfer oil, and the third heat storage tank contains 1 part of heat transfer oil.

[0015] During the daytime, open the first and second regulating valves, and close the third, fourth, fifth, and sixth regulating valves.

[0016] The parabolic trough solar collector concentrates and reflects sunlight to a frequency divider. The frequency divider then divides the sunlight into frequencies, and short-wave radiation is reflected onto the photovoltaic panels to generate electricity, which is then stored in an energy storage converter. This electricity directly drives the first and third oil circulation pumps and the refrigerant circulation pump. Long-wave radiation is transmitted through the collector tubes, heating the heat transfer oil. This heat acts on the generator as the driving heat source for the jet heat pump. Simultaneously, the low-temperature heat transfer oil in the second storage tank serves as a low-grade heat source to drive the jet heat pump circulation, ensuring heating during the daytime.

[0017] After the jet heat pump cycle, in the final state, the first heat storage tank contains 2 parts of heat transfer oil, the second heat storage tank contains 0 parts of heat transfer oil, and the third heat storage tank contains 1 part of heat transfer oil.

[0018] At night, open the fifth and sixth regulating valves, and close the first, second, third, and fourth regulating valves;

[0019] At night, the stored electrical energy in the energy storage converter is used as the power source for the second oil circulation pump, which drives the high-temperature heat transfer oil in the first heat storage tank to directly supply heat to the outside through the heat exchanger. The low-temperature heat transfer oil after heat exchange flows back to the second heat storage tank to ensure the heating condition at night.

[0020] After direct heat exchange and heating, in the final state, the first heat storage tank has 0 parts of heat transfer oil, the second heat storage tank has 2 parts of heat transfer oil, and the third heat storage tank has 1 part of heat transfer oil, returning to the initial oil volume and forming a cycle;

[0021] In extreme weather conditions, the stored electrical energy in the energy storage converter is used directly as the power source for the compressor to drive the compression heat pump cycle that uses air as a low-grade heat source, ensuring heating operation.

[0022] Furthermore, in the case of three-stage heating, in the initial state, the first heat storage tank contains 0 parts of heat transfer oil, the second heat storage tank contains 2 parts of heat transfer oil, and the third heat storage tank contains 1 part of heat transfer oil;

[0023] In the first stage, the first and second regulating valves are opened, while the third, fourth, fifth, and sixth regulating valves are closed.

[0024] The parabolic trough solar collector concentrates and reflects sunlight to a frequency divider. The frequency divider then divides the sunlight into frequencies, and short-wave radiation is reflected onto the photovoltaic panels to generate electricity, which is then stored in an energy storage converter. This electricity directly drives the first and third oil circulation pumps and the refrigerant circulation pump. Long-wave radiation is transmitted through the collector tubes, heating the heat transfer oil. This heat then powers the generator, serving as the driving heat source for the jet heat pump. Simultaneously, the low-temperature heat transfer oil in the second storage tank acts as a low-grade heat source to drive the jet heat pump circulation, ensuring adequate heating.

[0025] After the jet heat pump cycle, in the final state, the first heat storage tank contains 2 parts of heat transfer oil, the second heat storage tank contains 0 parts of heat transfer oil, and the third heat storage tank contains 1 part of heat transfer oil.

[0026] In the second stage, the fifth and sixth regulating valves are opened, while the first, second, third, and fourth regulating valves are closed.

[0027] The stored electrical energy in the energy storage converter serves as the power source for the second oil circulation pump, driving the high-temperature heat transfer oil in the first heat storage tank to directly supply heat to the outside via a heat exchanger. The low-temperature heat transfer oil after heat exchange flows back to the second heat storage tank, ensuring heating operation.

[0028] After direct heat exchange, in the final state, the first heat storage tank contains 0 parts of heat transfer oil, the second heat storage tank contains 2 parts of heat transfer oil, and the third heat storage tank contains 1 part of heat transfer oil.

[0029] In the third stage, the third and fourth regulating valves are opened, while the first, second, fifth, and sixth regulating valves are closed.

[0030] The stored electrical energy in the energy storage converter is used as the power source for the compressor to drive a compression heat pump cycle that uses low-temperature heat transfer oil in the second heat storage tank as a low-grade heat source, ensuring heating operation.

[0031] After being heated by a compression heat pump, in the final state, the first heat storage tank contains 0 parts of heat transfer oil, the second heat storage tank contains 1 part of heat transfer oil, and the third heat storage tank contains 2 parts of heat transfer oil.

[0032] The next time the jet heat pump is used for heating, pumps with different speeds are used to return the oil volume in each tank to the initial state of the jet heat pump heating, forming a cycle.

[0033] This invention provides a large temperature difference energy storage heating system based on the full spectrum utilization of solar energy, comprising a first oil circulation pump, a generator, a first heat storage tank, a second oil circulation pump, a heat exchanger, a second heat storage tank, a third oil circulation pump, a third heat storage tank, an energy storage converter, an ejector, a compressor, a condenser, a liquid receiver, a throttle valve, an evaporator, a refrigerant circulation pump, a first regulating valve, a second regulating valve, a third regulating valve, a fourth regulating valve, a fifth regulating valve, and a sixth regulating valve.

[0034] The oil outlet of the heat collector tube is connected to the oil inlet of the first oil circulation pump. The oil outlet of the first oil circulation pump is connected to the oil inlet of the generator. The oil outlet of the generator is connected to the oil inlet of the first heat storage tank. The oil outlet of the first heat storage tank is connected to the oil inlet of the second oil circulation pump. A sixth regulating valve is installed on the oil outlet pipe of the first heat storage tank. The oil outlet of the second oil circulation pump is connected to the oil inlet of the heat exchanger. The oil outlet of the heat exchanger is connected to the oil inlet of the second heat storage tank. A fifth regulating valve is installed on the oil outlet pipe of the heat exchanger. The oil outlet of the second heat storage tank is connected to the oil inlet of the third oil circulation pump. The oil outlet of the third oil circulation pump is connected to the oil inlet of the evaporator. The oil outlet of the evaporator is connected to the oil inlet of the third heat storage tank. The oil outlet of the third heat storage tank is connected to the oil inlet of the heat collector tube.

[0035] The generator's liquid outlet is connected to the ejector's high-pressure liquid inlet. The compressor's liquid outlet is connected to the inlets of the second ejector refrigerant line and the fourth gaseous refrigerant line, respectively. A second regulating valve is installed on the second ejector refrigerant line, and a third regulating valve is installed on the fourth gaseous refrigerant line. The liquid outlets of the ejector and the fourth gaseous refrigerant line merge and connect to the condenser's liquid inlet. A first regulating valve 30 is installed on the ejector's liquid outlet pipe. The condenser's liquid outlet is connected to the inlet of the receiver tank. The receiver tank's liquid outlet is connected to the inlet of the throttle valve. The throttle valve's liquid outlet is connected to the evaporator's liquid inlet. A fourth regulating valve is installed on the evaporator's liquid outlet pipe. The evaporator's liquid outlet is connected to the compressor's liquid inlet. The other liquid outlet of the receiver tank is connected to the inlet of the refrigerant circulation pump. The refrigerant circulation pump's liquid outlet is connected to the generator's liquid inlet.

[0036] Both the heat exchanger and the condenser are equipped with an inlet and an outlet on the other side.

[0037] The number of parabolic trough collectors is at least one. When the number of parabolic trough collectors is at least two, the parabolic trough collectors are evenly distributed. Each parabolic trough collector is equipped with a heat collection tube. Multiple heat collection tubes are connected in series. At least one parabolic trough collector is connected to a photovoltaic panel. The photovoltaic panel is connected to an energy storage converter. The energy storage converter is connected to a compressor, a first oil circulation pump, a second oil circulation pump, a third oil circulation pump, and a refrigerant circulation pump.

[0038] A heating method based on a large temperature difference energy storage heating system utilizing the full spectrum of solar energy, including two-stage heating and three-stage heating.

[0039] Furthermore, in the case of secondary heating, in the initial state, the first heat storage tank contains 0 parts of heat transfer oil, the second heat storage tank contains 2 parts of heat transfer oil, and the third heat storage tank contains 1 part of heat transfer oil.

[0040] During the daytime, open the first, second, and fourth regulating valves, and close the third, fifth, and sixth regulating valves.

[0041] The parabolic trough solar collector concentrates and reflects sunlight to a frequency divider. The frequency divider then divides the sunlight, and short-wave radiation is reflected onto the photovoltaic panels to generate electricity, which is then stored in an energy storage converter. This electricity directly drives the first and third oil circulation pumps and the refrigerant circulation pump. Long-wave radiation is transmitted through the collector tubes, heating the heat transfer oil. This heat acts on the generator as the driving heat source for the jet heat pump. Simultaneously, low-temperature heat transfer oil in the second storage tank serves as a low-grade heat source. The compressor, as an auxiliary device for the jet pump, pressurizes the ejector fluid, driving the compression-jet heat pump cycle to ensure heating during the daytime.

[0042] After the compression-ejection heat pump cycle, in the final state, the first heat storage tank contains 2 parts of heat transfer oil, the second heat storage tank contains 0 parts of heat transfer oil, and the third heat storage tank contains 1 part of heat transfer oil.

[0043] At night, open the fifth and sixth regulating valves, and close the first, second, third, and fourth regulating valves.

[0044] At night, the stored electrical energy in the energy storage converter is used as the power source for the second oil circulation pump, which drives the high-temperature heat transfer oil in the first heat storage tank to directly supply heat to the outside through the heat exchanger. The low-temperature heat transfer oil after heat exchange flows back to the second heat storage tank, ensuring heating operation at night.

[0045] After direct heat exchange and heating, in the final state, the first heat storage tank has 0 parts of heat transfer oil, the second heat storage tank has 2 parts of heat transfer oil, and the third heat storage tank has 1 part of heat transfer oil, returning to the initial oil volume and forming a cycle;

[0046] In extreme weather conditions, the stored electrical energy in the energy storage converter is used directly as the power source for the compressor to drive the compression heat pump cycle that uses air as a low-grade heat source, ensuring heating operation.

[0047] Furthermore, in the case of three-stage heating, in the initial state, the first heat storage tank contains 0 parts of heat transfer oil, the second heat storage tank contains 2 parts of heat transfer oil, and the third heat storage tank contains 1 part of heat transfer oil.

[0048] In the first stage, the first and second regulating valves are opened, while the third, fourth, fifth, and sixth regulating valves are closed.

[0049] The parabolic trough solar collector concentrates and reflects sunlight to a frequency divider. The frequency divider then divides the sunlight, and short-wave radiation is reflected onto the photovoltaic panels, generating electricity which is stored in an energy storage converter. This electricity directly drives the first and third oil circulation pumps and the refrigerant circulation pump. Long-wave radiation is transmitted through the collector tubes, heating the heat transfer oil. This heat acts on the generator as the driving heat source for the jet heat pump. Simultaneously, low-temperature heat transfer oil in the second storage tank serves as a low-grade heat source. The compressor, as an auxiliary device for the jet pump, pressurizes the ejector fluid, driving the compression-jet heat pump cycle to ensure heating operation.

[0050] After the compression-ejection heat pump cycle, in the final state, the first heat storage tank contains 2 parts of heat transfer oil, the second heat storage tank contains 0 parts of heat transfer oil, and the third heat storage tank contains 1 part of heat transfer oil.

[0051] In the second stage, the fifth and sixth regulating valves are opened, while the first, second, third, and fourth regulating valves are closed.

[0052] The stored electrical energy in the energy storage converter serves as the power source for the second oil circulation pump, driving the high-temperature heat transfer oil in the first heat storage tank to directly supply heat to the outside via a heat exchanger. The low-temperature heat transfer oil after heat exchange flows back to the second heat storage tank, ensuring heating operation.

[0053] After direct heat exchange, in the final state, the first heat storage tank contains 0 parts of heat transfer oil, the second heat storage tank contains 2 parts of heat transfer oil, and the third heat storage tank contains 1 part of heat transfer oil.

[0054] In the third stage, the third and fourth regulating valves are opened, while the first, second, fifth, and sixth regulating valves are closed.

[0055] The stored electrical energy in the energy storage converter is used as the power source for the compressor to drive a compression heat pump cycle that uses low-temperature heat transfer oil in the second heat storage tank as a low-grade heat source, ensuring heating operation.

[0056] After being heated by a compression heat pump, in the final state, the first heat storage tank contains 0 parts of heat transfer oil, the second heat storage tank contains 1 part of heat transfer oil, and the third heat storage tank contains 2 parts of heat transfer oil.

[0057] The next time the jet heat pump is used for heating, pumps with different speeds are used to return the oil volume in each tank to the initial state of the jet heat pump heating, forming a cycle.

[0058] Furthermore, the trough-type solar collector includes an arc-shaped secondary reflector, a parabolic primary reflector, and a solar collector tube. The central axis of the solar collector tube coincides with the focal line of the parabolic primary reflector. The cross-sections of the parabolic primary reflector and the arc-shaped secondary reflector are both arc-shaped. The arc-shaped secondary reflector is located above the solar collector tube, and the openings of the parabolic primary reflector and the parabolic secondary reflector are arranged facing each other.

[0059] Furthermore, the radius r of the circular arc secondary reflector is,

[0060]

[0061] In the formula, a is the length of OB; b1 is The coefficient with radius r; The edge angle of a parabolic primary reflector;

[0062] The width W of the arc-shaped secondary reflector is...

[0063]

[0064] In the formula, α is the tracking error angle; OB is the distance from the intersection point B of the most divergent ray of the parabolic primary mirror and the edge line on the other side to the intersection point O of the parabolic primary mirror surface;

[0065] The position d of the circular arc secondary reflector is...

[0066]

[0067] The circular arc secondary reflector is positioned on the vertical line of the heat collection tube. A circular arc structure with point as center, radius r, relative distance d from the center of the heat collection tube, and width W.

[0068] Compared with the prior art, the beneficial effects of the present invention are:

[0069] This invention discloses a large temperature difference energy storage heating system and method based on the full spectrum utilization of solar energy, comprising a solar concentrating and frequency-division photovoltaic power generation and heat collection system, a large temperature difference energy storage subsystem, and a compression-jet coupled heat pump subsystem. The solar concentrating and frequency-division photovoltaic power generation and heat collection subsystem generates electricity and heats the circulating medium in the heat collection tube, while storing excess electricity. The large temperature difference energy storage subsystem utilizes the heat of the heat transfer medium in a tiered and segmented manner, including two-stage heating and three-stage heating.

[0070] This invention discloses a large temperature difference energy storage and heating system and method based on the full spectrum of solar energy utilization. It adopts a technology of first concentrating light and then dividing it into frequencies to increase the energy flux density of the total solar beam, thereby improving the utilization rate of solar energy. At the same time, it reduces the laying area of ​​solar photovoltaic panels and frequency dividing films, and simplifies tracking and control. By setting a parabolic and discrete frequency dividing technology that satisfies the first reflection after concentration and the focal point of the collector, it reduces the divergence of sunlight after frequency division and the heating problem of photovoltaic panels, effectively improving the power generation efficiency of photovoltaic modules, maximizing the full spectrum of photothermal and photoelectric cascade utilization, and improving the utilization rate of solar energy across the entire wavelength band.

[0071] This invention discloses a large temperature difference energy storage heating system and heating method based on the full spectrum utilization of solar energy. Solar energy is utilized efficiently in stages through a heat transfer medium. The high-temperature section drives a jet heat pump, the medium-temperature section uses direct heat exchange, and the low-temperature section uses a photovoltaic energy storage heat pump for combined heating, thereby improving the heating guarantee.

[0072] This invention discloses a large temperature difference energy storage heating system and heating method based on the full spectrum utilization of solar energy. By utilizing the heat transfer medium in stages, the temperature difference of the heat transfer medium is maximized. Under the same heat storage capacity, the amount of heat transfer medium charged is greatly reduced, the energy storage density is increased, and energy efficiency is achieved.

[0073] This invention discloses a large temperature difference energy storage heating system and method based on the full spectrum utilization of solar energy. The two-stage heating mode is suitable for scenarios where variable frequency pumps are not suitable. In this mode, only high temperature (150-100 degrees Celsius) and medium temperature (100-60 degrees Celsius) heating are used, and the oil temperature can be reduced to 60 degrees Celsius. However, compared with the heating system using only jet heat pumps, the temperature difference of the heat transfer oil is increased, resulting in a certain improvement in energy storage effect. At the same time, after the two-stage heating cycle, the amount of heat transfer oil returns to its initial state, meeting the recirculation conditions. The three-stage heating mode can maximize the temperature difference of the heat transfer oil, minimizing the mass of the heat transfer oil and other heat storage media and maximizing the energy storage density. The three-stage heating mode utilizes the heat in three stages: high temperature (150-100 degrees Celsius), medium temperature (100-60 degrees Celsius), and low temperature (60-15 degrees Celsius). At this time, the oil temperature has been reduced to 15 degrees Celsius, the temperature difference of the heat transfer oil is significantly improved, and the energy storage effect is optimal. However, this mode must be used in conjunction with a variable frequency pump to meet the oil recirculation conditions. Attached Figure Description

[0074] Figure 1 The structure of the large temperature difference energy storage heating system based on the full spectrum utilization of solar energy in this embodiment of the invention is shown below. Figure 1 ;

[0075] Figure 2 The structure of the large temperature difference energy storage heating system based on the full spectrum utilization of solar energy in this embodiment of the invention is shown below. Figure 2 ;

[0076] Figure 3 This is a solar radiation path diagram of the slotted laser in an embodiment of the present invention;

[0077] Figure 4 This is a schematic diagram of the arc-shaped secondary reflector system in an embodiment of the present invention;

[0078] Figure 5 This is step one of the design method for the arc-shaped secondary reflector in this embodiment of the invention;

[0079] Figure 6 This is step two of the design method for the arc-shaped secondary reflector in this embodiment of the invention;

[0080] Figure 7 This is step three of the design method for the arc-shaped secondary reflector in this embodiment of the invention;

[0081] Figure 8 This is a diagram illustrating the design method of the arc-shaped secondary reflector for a trough-type concentrating solar collector system with the collector tubes offset vertically upwards, as described in this invention.

[0082] Figure 9 This is a diagram illustrating the design method of the arc-shaped secondary reflector for a trough-type concentrating solar collector system with the collector tube offset vertically downward, as described in this invention.

[0083] Figure 10 This is a schematic diagram of the offset direction when the heat collection tube is offset vertically in an embodiment of the present invention.

[0084] Explanation of reference numerals in the attached figures:

[0085] 1. Parabolic trough collector; 2. Photovoltaic panel; 3. Frequency divider; 4. Collector tube; 5. First oil circulation pump; 6. Generator; 7. First thermal storage tank; 8. Second oil circulation pump; 9. Heat exchanger; 10. Second thermal storage tank; 11. Third oil circulation pump; 12. Third thermal storage tank; 13. Energy storage converter; 14. Ejector; 15. Compressor; 16. Condenser; 17. Liquid receiver tank; 18. Throttling valve; 19. Evaporator; 20. Refrigerant circulation... Ring pump; 30, First regulating valve; 31, Second regulating valve; 32, Third regulating valve; 33, Fourth regulating valve; 34, Fifth regulating valve; 35, Sixth regulating valve; 60, First oil pipeline; 61, Second oil pipeline; 62, Third oil pipeline; 63, Fourth oil pipeline; 64, Fifth oil pipeline; 65, Sixth oil pipeline; 66, Seventh oil pipeline; 67, Eighth oil pipeline; 68, Ninth oil pipeline; 69, Tenth oil pipeline; 70, First working... 71. First refrigerant ejector line; 72. Second refrigerant line; 73. First refrigerant line; 74. Second liquid refrigerant line; 75. First liquid refrigerant line; 76. Second gaseous refrigerant line; 77. Mixed refrigerant line; 78. First gaseous refrigerant line; 79. Third gaseous refrigerant line; 80. Second working refrigerant line; 81. Third working refrigerant line; 82. First heat transfer medium Piping; 83, Second heat transfer medium piping; 84, Third heat transfer medium piping; 85, Fourth heat transfer medium piping; 86, Second ejector refrigerant piping; 87, Fourth gaseous refrigerant piping; 88, Third refrigerant piping; 89, Fourth refrigerant piping; 100, First power piping; 101, Second power piping; 102, Third power piping; 103, Fourth power piping; 104, Fifth power piping; 105, Sixth power piping. Detailed Implementation

[0086] In the description of this invention, it should be noted that the terms used in the various embodiments, such as "upper," "lower," "front," "rear," "left," and "right," which indicate orientation, are only used to simplify the description of the positional relationships based on the accompanying drawings and do not mean that the components and devices referred to must be operated in accordance with the specific orientations and defined operations, methods, and structures in the specification. Such directional terms do not constitute a limitation of this invention.

[0087] In the description of this invention, it should be noted that the terms "first," "second," "third," "fourth," "fifth," and "sixth" mentioned in the embodiments of this invention are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first," "second," "third," "fourth," "fifth," and "sixth" may explicitly or implicitly include one or more of that feature.

[0088] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0089] Specific Implementation Plan 1: Combining Figure 1 As shown, this invention provides a large temperature difference energy storage heating system based on the full spectrum utilization of solar energy, including a trough collector 1, photovoltaic panels 2, a frequency divider 3, collector tubes 4, a first oil circulation pump 5, a generator 6, a first heat storage tank 7, a second oil circulation pump 8, a heat exchanger 9, a second heat storage tank 10, a third oil circulation pump 11, a third heat storage tank 12, an energy storage converter 13, an ejector 14, a compressor 15, a condenser 16, a liquid storage tank 17, a throttle valve 18, an evaporator 19, a refrigerant circulation pump 20, a first regulating valve 30, a second regulating valve 31, a third regulating valve 32, a fourth regulating valve 33, a fifth regulating valve 34, a sixth regulating valve 35, a first oil pipeline 60, a second oil pipeline 61, a third oil pipeline 62, a fourth oil pipeline 63, a fifth oil pipeline 64, a sixth oil pipeline 65, and a seventh oil pipeline. 66. Eighth oil pipeline; 67. Ninth oil pipeline; 68. Tenth oil pipeline; 69. First working refrigerant pipeline; 70. First ejector refrigerant pipeline; 71. Mixed refrigerant pipeline; 77. First gaseous refrigerant pipeline; 78. Second gaseous refrigerant pipeline; 76. First liquid refrigerant pipeline; 75. Second liquid refrigerant pipeline; 74. First refrigerant pipeline; 73. Second refrigerant pipeline; 72. Third gaseous refrigerant pipeline; 79. Second working refrigerant pipeline; 80. Third working refrigerant pipeline; 81. First heat transfer medium pipeline; 82. Second heat transfer medium pipeline; 83. Third heat transfer medium pipeline; 84. Fourth heat transfer medium pipeline; 85. First power pipeline; 100. Second power pipeline; 101. Third power pipeline; 102. Fourth power pipeline; 103. Fifth power pipeline; 104. Sixth power pipeline; 105.

[0090] The oil outlet of the collector tube 4 is connected to the oil inlet of the first oil pipeline 60. The oil outlet of the first oil pipeline 60 is connected to the oil inlet of the first oil circulation pump 5. The oil outlet of the first oil circulation pump 5 is connected to the oil inlet of the second oil pipeline 61. The oil outlet of the second oil pipeline 61 is connected to the oil inlet of the generator 6. The oil outlet of the generator 6 is connected to the oil inlet of the third oil pipeline 62. The oil outlet of the third oil pipeline 62 is connected to the oil inlet of the first heat storage tank 7. The oil outlet of the first heat storage tank 7 is connected to the oil inlet of the fourth oil pipeline 63. The oil outlet of the fourth oil pipeline 63 is connected to the oil inlet of the second oil circulation pump 8. A sixth regulating valve 35 is installed on the fourth oil pipeline 63. The oil outlet of the second oil circulation pump 8 is connected to the oil inlet of the fifth oil pipeline 64. The oil outlet of the fifth oil pipeline 64 is connected to the oil inlet of the heat exchanger 9. The heat exchanger 9... The oil outlet of the first oil pipe is connected to the oil inlet of the sixth oil pipe 65, which in turn is connected to the oil inlet of the second heat storage tank 10. A fifth regulating valve 34 is installed on the sixth oil pipe 65. The oil outlet of the second heat storage tank 10 is connected to the oil inlet of the seventh oil pipe 66, which in turn is connected to the oil inlet of the third oil circulation pump 11. The oil outlet of the third oil circulation pump 11 is connected to the oil inlet of the eighth oil pipe 67, which in turn is connected to the oil inlet of the evaporator 19. The oil outlet of the evaporator 19 is connected to the oil inlet of the ninth oil pipe 68, which in turn is connected to the oil inlet of the third heat storage tank 12. The oil outlet of the third heat storage tank 12 is connected to the oil inlet of the tenth oil pipe 69, which in turn is connected to the oil inlet of the collector tube 4.

[0091] The outlet of generator 6 is connected to the inlet of the first working refrigerant line 70. The outlet of the first working refrigerant line 70 is connected to the high-pressure inlet of ejector 14. The low-pressure inlet of ejector 14 is connected to the outlet of the first ejector refrigerant line 71. A second regulating valve 31 is provided on the first ejector refrigerant line 71. The inlet of the first ejector refrigerant line 71 is connected to the outlet of the second refrigerant line 72 and the inlet of the third gaseous refrigerant line 79. The third gaseous refrigerant line 79... A fourth regulating valve 33 is provided. The liquid outlet of the third gaseous refrigerant line 79 is connected to the liquid inlet of the compressor 15. The liquid outlet of the compressor 15 is connected to the liquid inlet of the first gaseous refrigerant line 78. A third regulating valve 32 is provided on the first gaseous refrigerant line 78. The liquid outlet of the ejector 14 is connected to the liquid inlet of the mixed refrigerant line 77. A first regulating valve 30 is provided on the mixed refrigerant line 77. The liquid outlets of the mixed refrigerant line 77 and the first gaseous refrigerant line 78 merge and then connect to the second gaseous refrigerant line. The inlet of the second gaseous refrigerant line 76 is connected to the liquid inlet of the condenser 16. The liquid outlet of the condenser 16 is connected to the liquid inlet of the first liquid refrigerant line 75. The liquid outlet of the first liquid refrigerant line 75 is connected to the liquid inlet of the liquid receiver 17. The liquid outlet of the liquid receiver 17 is connected to the liquid inlet of the second liquid refrigerant line 74. The liquid outlet of the second liquid refrigerant line 74 is connected to the liquid inlet of the expansion valve 18. The liquid outlet of the expansion valve 18 is connected to the liquid inlet of the first refrigerant line 73. The liquid outlet of the first refrigerant line 73 is connected to the liquid inlet of the evaporator 19. The liquid outlet of the evaporator 19 is connected to the liquid inlet of the second refrigerant line 72. The liquid outlet on the other side of the liquid storage tank 17 is connected to the liquid inlet of the second working refrigerant line 80. The liquid outlet of the second working refrigerant line 80 is connected to the liquid inlet of the refrigerant circulation pump 20. The liquid outlet of the refrigerant circulation pump 20 is connected to the liquid inlet of the third working refrigerant line 81. The liquid outlet of the third working refrigerant line 81 is connected to the liquid inlet of the generator 6.

[0092] The outlet of the first heat transfer medium pipeline 82 is connected to the inlet on the other side of the heat exchanger 9. The outlet on the other side of the heat exchanger 9 is connected to the inlet of the second heat transfer medium pipeline 83. The outlet of the third heat transfer medium pipeline 84 is connected to the inlet on the other side of the condenser 16. The outlet on the other side of the condenser 16 is connected to the inlet of the fourth heat transfer medium pipeline 85.

[0093] The number of parabolic trough collectors 1 is at least one. When the number of parabolic trough collectors 1 is at least two, the parabolic trough collectors 1 are evenly distributed. Each parabolic trough collector 1 includes a collector tube 4, and multiple collector tubes 4 are connected in series. At least one parabolic trough collector 1 is connected to a photovoltaic panel 2. The photovoltaic panel 2 is connected to an energy storage converter 13. The energy storage converter 13 is connected to a compressor 15, a first oil circulation pump 5, a second oil circulation pump 8, a third oil circulation pump 11, and a refrigerant circulation pump 20, respectively, as a source of electrical energy.

[0094] The power outlet of the energy storage converter 13 is connected to the power inlet of the first power line 100. The power outlet of the first power line 100 is connected to the power inlets of the second power line 101, the third power line 102, the fourth power line 103, the fifth power line 104, and the sixth power line 105. The power outlet of the second power line 101 is connected to the power inlet of the first oil circulation pump 5. The power outlet of the third power line 102 is connected to the power inlet of the second oil circulation pump 8. The power outlet of the fourth power line 103 is connected to the power inlet of the compressor 15. The power outlet of the fifth power line 104 is connected to the power inlet of the refrigerant circulation pump 20. The power outlet of the sixth power line 105 is connected to the power inlet of the third oil circulation pump 11.

[0095] Operation Plan 1 of this implementation plan:

[0096] The two-stage heating system initially allocates the following amounts of heat transfer oil: the first heat storage tank 7 contains 0 parts heat transfer oil, the second heat storage tank 10 contains 2 parts heat transfer oil, and the third heat storage tank 12 contains 1 part heat transfer oil.

[0097] During the day, open the first regulating valve 30 and the second regulating valve 31, and close the third regulating valve 32, the fourth regulating valve 33, the fifth regulating valve 34 and the sixth regulating valve 35;

[0098] The parabolic trough collector 1 concentrates sunlight to increase its energy flux density and reflects it once to the frequency divider 3. After frequency division by the frequency divider 3, the short-wave reflection acts on the photovoltaic panel 2 to generate electrical energy, which is then stored in the energy storage converter 13 and converted from DC to AC for backup. Part of the electrical energy directly drives the first oil circulation pump 5, the third oil circulation pump 11, and the refrigerant circulation pump 20. The long-wave transmission acts on the collector tube 4 to heat the heat transfer oil. The heat acts on the generator 6 as the driving heat source of the jet heat pump. At the same time, the low-temperature heat transfer oil in the second heat storage tank 10 serves as a low-grade heat source to drive the jet heat pump circulation, ensuring heating during the day.

[0099] After the jet heat pump cycle, the final oil volume in each tank is as follows: the first heat storage tank 7 contains 2 parts of heat transfer oil, the second heat storage tank 10 contains 0 parts of heat transfer oil, and the third heat storage tank 12 contains 1 part of heat transfer oil.

[0100] At night, open the fifth regulating valve 34 and the sixth regulating valve 35, and close the first regulating valve 30, the second regulating valve 31, the third regulating valve 32 and the fourth regulating valve 33;

[0101] At night, the stored electrical energy in the energy storage converter 13 is used as the power source for the second oil circulation pump 8 to drive the high-temperature heat transfer oil in the first heat storage tank 7 to directly supply heat to the outside through the heat exchanger 9. The low-temperature heat transfer oil after heat exchange flows back to the second heat storage tank 10 to ensure the heating condition at night.

[0102] After direct heat exchange, the final oil volume in each tank is as follows: the first heat storage tank 7 contains 0 parts of heat transfer oil, the second heat storage tank 10 contains 2 parts of heat transfer oil, and the third heat storage tank 12 contains 1 part of heat transfer oil, returning to the initial oil volume and forming a cycle.

[0103] In extreme weather conditions, the stored electrical energy in the energy storage converter 13 is directly used as the power source for the compressor 15 to drive the compression heat pump cycle that uses air as a low-grade heat source, ensuring heating operation.

[0104] Operational Plan Two of this Implementation Plan:

[0105] The initial oil allocation for the three-stage heating system is as follows: 0 parts heat transfer oil for the first heat storage tank 7, 2 parts heat transfer oil for the second heat storage tank 10, and 1 part heat transfer oil for the third heat storage tank 12.

[0106] In the first stage, the first regulating valve 30 and the second regulating valve 31 are opened, and the third regulating valve 32, the fourth regulating valve 33, the fifth regulating valve 34 and the sixth regulating valve 35 are closed.

[0107] The parabolic trough collector 1 concentrates sunlight to increase its energy flux density and reflects it once to the frequency divider 3. After the frequency divider 3 divides the frequency, the short-wave reflection acts on the photovoltaic panel 2 to generate electricity, which is then stored in the energy storage converter 13 and converted from DC to AC for backup. Part of the electricity directly drives the first oil circulation pump 5, the third oil circulation pump 11 and the refrigerant circulation pump 20. The long-wave transmission acts on the collector tube 4 to heat the heat transfer oil. The heat acts on the generator 6 as the driving heat source of the jet heat pump. At the same time, the low-temperature heat transfer oil in the second heat storage tank 10 is used as a low-grade heat source to drive the jet heat pump circulation and ensure the heating conditions.

[0108] After the jet heat pump cycle, the final oil volume in each tank is as follows: the first heat storage tank 7 contains 2 parts of heat transfer oil, the second heat storage tank 10 contains 0 parts of heat transfer oil, and the third heat storage tank 12 contains 1 part of heat transfer oil.

[0109] In the second stage, the fifth regulating valve 34 and the sixth regulating valve 35 are opened, and the first regulating valve 30, the second regulating valve 31, the third regulating valve 32 and the fourth regulating valve 33 are closed.

[0110] The stored electrical energy in the energy storage converter 13 is used as the power source for the second oil circulation pump 8, which drives the high-temperature heat transfer oil in the first heat storage tank 7 to directly supply heat to the outside through the heat exchanger 9. The low-temperature heat transfer oil after heat exchange flows back to the second heat storage tank 10 to ensure the heating condition.

[0111] After direct heat exchange, the final oil volume in each tank is as follows: the first heat storage tank 7 contains 0 parts of heat transfer oil, the second heat storage tank 10 contains 2 parts of heat transfer oil, and the third heat storage tank 12 contains 1 part of heat transfer oil.

[0112] In the third stage, the third regulating valve 32 and the fourth regulating valve 33 are opened, and the first regulating valve 30, the second regulating valve 31, the fifth regulating valve 34 and the sixth regulating valve 35 are closed.

[0113] The stored electrical energy in the energy storage converter 13 is used as the power source for the compressor 15 to drive the compression heat pump cycle, which uses the low-temperature heat transfer oil in the second heat storage tank 10 as the low-grade heat source, to ensure the heating operation.

[0114] After being heated by a compression heat pump, the final oil volume in each tank is as follows: the first heat storage tank 7 contains 0 parts of heat transfer oil, the second heat storage tank 10 contains 1 part of heat transfer oil, and the third heat storage tank 12 contains 2 parts of heat transfer oil.

[0115] The next time the jet heat pump is used for heating, pumps with different speeds will be used to ensure that the final oil volume in each tank is as follows: the first heat storage tank 7 contains 2 parts of heat transfer oil, the second heat storage tank 10 contains 0 parts of heat transfer oil, and the third heat storage tank 12 contains 1 part of heat transfer oil. This returns the system to the initial state of the jet heat pump heating, forming a cycle.

[0116] Specific Implementation Plan Two: Combining Figure 2As shown, this invention provides a large temperature difference energy storage heating system based on the full spectrum utilization of solar energy, including a trough collector 1, photovoltaic panels 2, a frequency divider 3, collector tubes 4, a first oil circulation pump 5, a generator 6, a first heat storage tank 7, a second oil circulation pump 8, a heat exchanger 9, a second heat storage tank 10, a third oil circulation pump 11, a third heat storage tank 12, an energy storage converter 13, an ejector 14, a compressor 15, a condenser 16, a liquid storage tank 17, a throttle valve 18, an evaporator 19, a refrigerant circulation pump 20, a first regulating valve 30, a second regulating valve 31, a third regulating valve 32, a fourth regulating valve 33, a fifth regulating valve 34, a sixth regulating valve 35, a first oil pipeline 60, a second oil pipeline 61, a third oil pipeline 62, a fourth oil pipeline 63, a fifth oil pipeline 64, a sixth oil pipeline 65, and a seventh oil pipeline. Line 66, Eighth Oil Pipeline, 67, Ninth Oil Pipeline, 68, Tenth Oil Pipeline, 69, First Working Refrigerant Pipeline, 70, Mixed Refrigerant Pipeline, 77, Second Gaseous Refrigerant Pipeline, 76, First Liquid Refrigerant Pipeline, 75, Second Liquid Refrigerant Pipeline, 74, First Refrigerant Pipeline, 73, Second Working Refrigerant Pipeline, 80, Third Working Refrigerant Pipeline, 81, First Heat Transfer Medium Pipeline, 82, Second Heat Transfer Medium Pipeline, 83, Third Heat Transfer Medium Pipeline, 84, Fourth Heat Transfer Medium Pipeline, 85, Second Ejector Refrigerant Pipeline, 86, Fourth Gaseous Refrigerant Pipeline, 87, Third Refrigerant Pipeline, 88, Fourth Refrigerant Pipeline, 89, First Electrical Pipeline, 100, Second Electrical Pipeline, 101, Third Electrical Pipeline, 102, Fourth Electrical Pipeline, 103, Fifth Electrical Pipeline, 104, Sixth Electrical Pipeline,

[0117] The oil outlet of the collector tube 4 is connected to the oil inlet of the first oil pipeline 60. The oil outlet of the first oil pipeline 60 is connected to the oil inlet of the first oil circulation pump 5. The oil outlet of the first oil circulation pump 5 is connected to the oil inlet of the second oil pipeline 61. The oil outlet of the second oil pipeline 61 is connected to the oil inlet of the generator 6. The oil outlet of the generator 6 is connected to the oil inlet of the third oil pipeline 62. The oil outlet of the third oil pipeline 62 is connected to the oil inlet of the first heat storage tank 7. The oil outlet of the first heat storage tank 7 is connected to the oil inlet of the fourth oil pipeline 63. The oil outlet of the fourth oil pipeline 63 is connected to the oil inlet of the second oil circulation pump 8. A sixth regulating valve 35 is installed on the fourth oil pipeline 63. The oil outlet of the second oil circulation pump 8 is connected to the oil inlet of the fifth oil pipeline 64. The oil outlet of the fifth oil pipeline 64 is connected to the oil inlet of the heat exchanger 9. The heat exchanger 9... The oil outlet of the first oil pipe is connected to the oil inlet of the sixth oil pipe 65, which in turn is connected to the oil inlet of the second heat storage tank 10. A fifth regulating valve 34 is installed on the sixth oil pipe 65. The oil outlet of the second heat storage tank 10 is connected to the oil inlet of the seventh oil pipe 66, which in turn is connected to the oil inlet of the third oil circulation pump 11. The oil outlet of the third oil circulation pump 11 is connected to the oil inlet of the eighth oil pipe 67, which in turn is connected to the oil inlet of the evaporator 19. The oil outlet of the evaporator 19 is connected to the oil inlet of the ninth oil pipe 68, which in turn is connected to the oil inlet of the third heat storage tank 12. The oil outlet of the third heat storage tank 12 is connected to the oil inlet of the tenth oil pipe 69, which in turn is connected to the oil inlet of the collector tube 4.

[0118] The liquid outlet of generator 6 is connected to the liquid inlet of the first working refrigerant line 70. The liquid outlet of the first working refrigerant line 70 is connected to the high-pressure liquid inlet of ejector 14. The low-pressure liquid inlet of ejector 14 is connected to the liquid outlet of the second ejector refrigerant line 86. The liquid inlet of the second ejector refrigerant line 86 is connected to the liquid inlet of the fourth gaseous refrigerant line 87 and the liquid outlet of the third refrigerant line 88. A second regulating valve 31 is provided on the second ejector refrigerant line 86, and a second regulating valve 31 is provided on the fourth gaseous refrigerant line 87. A third regulating valve 32 is provided. The liquid outlet of the ejector 14 is connected to the liquid inlet of the mixed refrigerant line 77. A first regulating valve 30 is provided on the mixed refrigerant line 77. The liquid outlet of the mixed refrigerant line 77 and the liquid outlet of the fourth gaseous refrigerant line 87 merge and are connected to the liquid inlet of the second gaseous refrigerant line 76. The liquid outlet of the second gaseous refrigerant line 76 is connected to the liquid inlet of the condenser 16. The liquid outlet of the condenser 16 is connected to the liquid inlet of the first liquid refrigerant line 75. The liquid outlet of the first liquid refrigerant line 75... The outlet of the liquid storage tank 17 is connected to the inlet of the second liquid refrigerant line 74, the outlet of the second liquid refrigerant line 74 is connected to the inlet of the expansion valve 18, the outlet of the expansion valve 18 is connected to the inlet of the first refrigerant line 73, the outlet of the first refrigerant line 73 is connected to the inlet of the evaporator 19, the outlet of the evaporator 19 is connected to the inlet of the fourth refrigerant line 89, and a fourth regulating valve 33 is provided on the outlet of the fourth refrigerant line 89. The outlet of the fourth refrigerant line 89 is connected to the inlet of the compressor 15. The outlet of the compressor 15 is connected to the inlet of the third refrigerant line 88. The outlet on the other side of the receiver tank 17 is connected to the inlet of the second working refrigerant line 80. The outlet of the second working refrigerant line 80 is connected to the inlet of the refrigerant circulation pump 20. The outlet of the refrigerant circulation pump 20 is connected to the inlet of the third working refrigerant line 81. The outlet of the third working refrigerant line 81 is connected to the inlet of the generator 6.

[0119] The outlet of the first heat transfer medium pipeline 82 is connected to the inlet on the other side of the heat exchanger 9. The outlet on the other side of the heat exchanger 9 is connected to the inlet of the second heat transfer medium pipeline 83. The outlet of the third heat transfer medium pipeline 84 is connected to the inlet on the other side of the condenser 16. The outlet on the other side of the condenser 16 is connected to the inlet of the fourth heat transfer medium pipeline 85.

[0120] The number of parabolic trough collectors 1 is at least one. When the number of parabolic trough collectors 1 is at least two, the parabolic trough collectors 1 are evenly distributed. Each parabolic trough collector 1 includes a collector tube 4, and multiple collector tubes 4 are connected in series. At least one parabolic trough collector 1 is connected to a photovoltaic panel 2. The photovoltaic panel 2 is connected to an energy storage converter 13. The energy storage converter 13 is connected to a compressor 15, a first oil circulation pump 5, a second oil circulation pump 8, a third oil circulation pump 11, and a refrigerant circulation pump 20, respectively, as a source of electrical energy.

[0121] The power outlet of the energy storage converter 13 is connected to the power inlet of the first power line 100. The power outlet of the first power line 100 is connected to the power inlets of the second power line 101, the third power line 102, the fourth power line 103, the fifth power line 104, and the sixth power line 105. The power outlet of the second power line 101 is connected to the power inlet of the first oil circulation pump 5. The power outlet of the third power line 102 is connected to the power inlet of the second oil circulation pump 8. The power outlet of the fourth power line 103 is connected to the power inlet of the compressor 15. The power outlet of the fifth power line 104 is connected to the power inlet of the refrigerant circulation pump 20. The power outlet of the sixth power line 105 is connected to the power inlet of the third oil circulation pump 11.

[0122] The other combinations and connections in this implementation scheme are the same as in Specific Implementation Scheme 1.

[0123] Operation Plan 1 of this implementation plan:

[0124] The two-stage heating system initially allocates the following amounts of heat transfer oil: 0 parts for the first heat storage tank 7, 2 parts for the second heat storage tank 10, and 1 part for the third heat storage tank 12.

[0125] During the day, open the first regulating valve 30, the second regulating valve 31 and the fourth regulating valve 33, and close the third regulating valve 32, the fifth regulating valve 34 and the sixth regulating valve 35.

[0126] The parabolic trough collector 1 concentrates sunlight to increase its energy flux density and reflects it once to the frequency divider 3. After frequency division by the frequency divider 3, the short-wave reflection acts on the photovoltaic panel 2 to generate electricity, which is then stored in the energy storage converter 13 and converted from DC to AC for backup. A portion of the electricity directly drives the first oil circulation pump 5, the third oil circulation pump 11, and the refrigerant circulation pump 20. The long-wave transmission acts on the collector tube 4 to heat the heat transfer oil, and the heat acts on the generator 6 as the driving heat source for the jet heat pump. At the same time, the low-temperature heat transfer oil in the second heat storage tank 10 serves as a low-grade heat source. The compressor 15 acts as an auxiliary device for the jet heat pump to pressurize the ejector fluid, driving the compression-jet heat pump cycle, improving the efficiency of the jet heat pump cycle, and ensuring heating during the day.

[0127] After the compression-jet heat pump cycle, the final oil volume in each tank is as follows: the first heat storage tank 7 contains 2 parts of heat transfer oil, the second heat storage tank 10 contains 0 parts of heat transfer oil, and the third heat storage tank 12 contains 1 part of heat transfer oil.

[0128] At night, open the fifth regulating valve 34 and the sixth regulating valve 35, and close the first regulating valve 30, the second regulating valve 31, the third regulating valve 32 and the fourth regulating valve 33.

[0129] At night, the stored electrical energy in the energy storage converter 13 is used as the power source for the second oil circulation pump 8, which drives the high-temperature heat transfer oil in the first heat storage tank 7 to directly supply heat to the outside through the heat exchanger 9. The low-temperature heat transfer oil after heat exchange flows back to the second heat storage tank 10 to ensure the heating condition at night.

[0130] After direct heat exchange, the final oil volume in each tank is as follows: the first heat storage tank 7 contains 0 parts of heat transfer oil, the second heat storage tank 10 contains 2 parts of heat transfer oil, and the third heat storage tank 12 contains 1 part of heat transfer oil, returning to the initial oil volume and forming a cycle.

[0131] In extreme weather conditions, the stored electrical energy in the energy storage converter 13 is directly used as the power source for the compressor 15 to drive the compression heat pump cycle that uses air as a low-grade heat source, ensuring heating operation.

[0132] Operational Plan Two of this Implementation Plan:

[0133] The initial oil allocation for the three-stage heating system is as follows: 0 parts heat transfer oil for the first heat storage tank 7, 2 parts heat transfer oil for the second heat storage tank 10, and 1 part heat transfer oil for the third heat storage tank 12.

[0134] In the first stage, the first regulating valve 30, the second regulating valve 31, and the fourth regulating valve 33 are opened, while the third regulating valve 32, the fifth regulating valve 34, and the sixth regulating valve 35 are closed.

[0135] The parabolic trough collector 1 concentrates sunlight to increase its energy flux density and simultaneously reflects it once to the frequency divider 3. After frequency division by the frequency divider 3, the short-wave reflection acts on the photovoltaic panel 2 to generate electricity, which is then stored in the energy storage converter 13 and converted from DC to AC for backup. Part of the electricity directly drives the first oil circulation pump 5, the third oil circulation pump 11, and the refrigerant circulation pump 20. The long-wave transmission acts on the collector tube 4 to heat the heat transfer oil, and the heat acts on the generator 6 as the driving heat source for the jet heat pump. At the same time, the low-temperature heat transfer oil in the second heat storage tank 10 serves as a low-grade heat source. The compressor 15 acts as an auxiliary device for the jet heat pump to pressurize the ejector fluid, driving the compression-jet heat pump cycle, improving the efficiency of the jet heat pump cycle, and ensuring the heating conditions.

[0136] After the compression-jet heat pump cycle, the final oil volume in each tank is as follows: the first heat storage tank 7 contains 2 parts of heat transfer oil, the second heat storage tank 10 contains 0 parts of heat transfer oil, and the third heat storage tank 12 contains 1 part of heat transfer oil.

[0137] In the second stage, the fifth regulating valve 34 and the sixth regulating valve 35 are opened, while the first regulating valve 30, the second regulating valve 31, the third regulating valve 32, and the fourth regulating valve 33 are closed.

[0138] The stored electrical energy in the energy storage converter 13 is used as the power source for the second oil circulation pump 8, which drives the high-temperature heat transfer oil in the first heat storage tank 7 to directly supply heat to the outside through the heat exchanger 9. The low-temperature heat transfer oil after heat exchange flows back to the second heat storage tank 10 to ensure the heating operation.

[0139] After direct heat exchange, the final oil volume in each tank is as follows: the first heat storage tank 7 contains 0 parts of heat transfer oil, the second heat storage tank 10 contains 2 parts of heat transfer oil, and the third heat storage tank 12 contains 1 part of heat transfer oil.

[0140] In the third stage, the third regulating valve 32 and the fourth regulating valve 33 are opened, while the first regulating valve 30, the second regulating valve 31, the fifth regulating valve 34, and the sixth regulating valve 35 are closed.

[0141] The stored electrical energy in the energy storage converter 13 is used as the power source for the compressor 15 to drive the compression heat pump cycle, which uses the low-temperature heat transfer oil in the second heat storage tank 10 as a low-grade heat source, to ensure heating conditions.

[0142] After being heated by a compression heat pump, the final oil volume in each tank is as follows: the first heat storage tank 7 contains 0 parts of heat transfer oil, the second heat storage tank 10 contains 1 part of heat transfer oil, and the third heat storage tank 12 contains 2 parts of heat transfer oil.

[0143] The next time the compression-ejection heat pump is used for heating, pumps with different speeds are used to ensure that the final oil volume in each tank is as follows: the first heat storage tank 7 contains 2 parts of heat transfer oil, the second heat storage tank 10 contains 0 parts of heat transfer oil, and the third heat storage tank 12 contains 1 part of heat transfer oil, returning to the initial state of the ejection heat pump heating and forming a cycle.

[0144] Two-stage and three-stage heating systems each have their advantages and disadvantages. Although three-stage heating has a better heating effect, the variable frequency pump used is more expensive than the fixed frequency pump, and its structure is more complex and difficult to maintain. It is also sensitive to the environment. For example, in hospitals or other environments with strong magnetic fields (such as magnetic resonance imaging), variable frequency pumps cannot be used due to electromagnetic interference. In high-dust environments, the heat dissipation of the frequency converter will be affected. In radiation environments, such as nuclear power plants, the electronic components of the frequency converter may experience stability failures.

[0145] Specific Implementation Plan III. Combination Figures 4 to 10As shown, the trough-type solar collector 1 includes an arc-shaped secondary reflector, a parabolic primary reflector, and a solar collector tube. The central axis of the solar collector tube coincides with the focal line of the parabolic primary reflector. The cross-sections of the parabolic primary reflector and the arc-shaped secondary reflector are both arc-shaped. The arc-shaped secondary reflector is located above the solar collector tube, and the openings of the parabolic primary reflector and the parabolic secondary reflector are arranged facing each other.

[0146] The other combinations and connections in this implementation scheme are the same as those in specific implementation scheme one or two.

[0147] Specific Implementation Plan IV. Combination Figures 4 to 10 As shown, the design method of the circular arc secondary reflector includes the following steps:

[0148] The parabolic equation of the parabolic primary reflection mirror is: The radius of the inner tube of the heat collector is r. a The angle between the reflected ray and the normal is called the position angle.

[0149] Step 1: Based on the structural parameters of the parabolic primary mirror and the tracking error angle α, determine the circle of tangency for the most divergent rays located at one edge corner of the parabolic primary mirror. The point of tangency is point A, and the intersection of the mirror surfaces is point O. At this point, the intersection of the parabolic primary mirror surfaces coincides with the center of the heat collection tube. The distance from point O to point A is OA. From the equation of the parabola, we have:

[0150]

[0151] In the formula, the height of the parabola is h; α is the tracking error angle; W a is the opening width of the parabolic primary mirror; f is the focal length of the parabolic primary mirror; when the edge angle When less than 90°,

[0152]

[0153] At the same time,

[0154]

[0155] In the formula, Let the edge angle of the parabolic primary reflector be defined as 0°, and the bottom position angle of the heat collection tube be defined as increasing counterclockwise. The maximum position angle is also called the edge angle of the parabolic primary reflector. We have:

[0156] Similarly, when For angles greater than or equal to 90°, the above formula still holds; RQ is a ray parallel to the principal axis, whose reflected ray OQ passes through the focal point, and its focal radius is OQ. At the edge, x0 = Wa When the value is 2, OQ reaches its maximum value.

[0157]

[0158] Considering the existence of tracking errors and mirror shape processing errors, which cause light to defocus, the light divergence is most severe, that is, the maximum OA is corresponding to the edge of the parabola, and the maximum value is:

[0159]

[0160] ,

[0161]

[0162] Step 2: Determine the distance OB from the intersection point B of the most diverging ray of the parabolic primary mirror and the other edge line to the intersection point O of the parabolic primary mirror surface. Since the cross-section of the circular arc secondary mirror is axisymmetric, based on OB and the edge angle... Calculate the width BD of the secondary reflector.

[0163]

[0164]

[0165] Step 3: Based on the positional relationship between the arc-shaped secondary reflector and the heat collection tube. The relative position OC of the arc-shaped secondary reflector is calculated, where OC is the vertical distance from the top of the arc-shaped secondary reflector to the center of the heat collection tube, i.e., the relative position of the arc-shaped secondary reflector; r is the radius of the arc-shaped secondary reflector; let OC = b*r, and the optical simulation fitting yields OC = 0.9226r - 0.0343, where the optical software can be TracePro, and approximately OC ≈ 0.9r. ,Right now To simplify the calculation, let OB = a. In the case of cosines, by the law of cosines: Substituting the values, we get: Solving for the problem, we get:

[0166]

[0167] In the formula, a is the length of OB; b1 is The coefficient with radius r.

[0168] The position d of the secondary reflector is,

[0169]

[0170] In summary, a circular arc-shaped secondary reflector for a trough-type concentrating solar collector, namely, one located on the vertical line of the collector tube... A circular arc structure with point as center, radius r, relative distance d from the center of the heat collection tube, and width W.

[0171] The placement, radius, and width of the arc-shaped secondary reflector are simulated and fitted using geometric optics principles and optical software to ensure that the reflected light from the secondary reflector illuminates the heat collection tube to the maximum extent, thereby improving optical efficiency. Considering the case where the heat collection tube is vertically offset from the focal point of the parabolic primary reflector due to installation errors, corrected fitting parameters are provided to improve the accuracy of the design method.

[0172] When the central axis of the heat collection tube shifts upward along the rod direction at the focal line of the parabolic primary reflector, when the shift amount... Unlike the above scheme, in step three, the positional relationship between the focal points of the arc-shaped secondary reflecting mirror and the parabolic primary reflecting mirror is used... Calculate the vertical offset l1 between the center O1 of the heat collector tube and the focal point of the parabolic primary reflector, and then calculate the relative position O1C of the arc-shaped secondary reflector. Here, O1C is the vertical distance from the top of the secondary reflector to the center O1 of the heat collector tube, i.e., the relative position of the secondary reflector. Let O1C = b * r, where b is the coefficient between OC and radius r. A coefficient b of 0.92 to 0.96 is recommended. ,Right now ， In the formula, OO1 is the upward offset l1 of the center O1 of the heat collection tube and the focal point of the parabolic primary reflector along the rod direction. By the cosine theorem, we have:

[0173]

[0174] .

[0175] The position d of the secondary reflector is,

[0176]

[0177] When the central axis of the heat collection tube is offset vertically downwards from the focal line of the parabolic primary reflector, when the offset amount Unlike the above scheme, in step three, the positional relationship between the focal points of the arc-shaped secondary reflecting mirror and the parabolic primary reflecting mirror is used... Calculate the perpendicular offset l2 between the center O2 of the heat collector tube and the focal point of the parabolic primary reflector, and calculate the relative position O2C of the arc-shaped secondary reflector.

[0178] Where O2C is the vertical distance from the top of the secondary reflector to the center O2 of the heat collection tube, i.e., the relative position of the secondary reflector. Let O2C = b*r, where b is the coefficient between OC and radius r. The recommended coefficient b is 0.92~0.99. ,Right now ， In the formula, OO2 is the vertical downward offset l2 between the center O2 of the heat collection tube and the focal point of the parabolic primary reflector. By the law of cosines, we have:

[0179]

[0180] .

[0181] The position d of the secondary reflector is,

[0182]

[0183] It should be noted that, in combination Figure 10 As shown, in specific implementation methods three and four, only the vertical offset of the heat collection tube is considered. This is because: 1. Combining Figure 10 a. When the trough-type solar collector is in a vertical position, it is common for the collector tubes to shift in the vertical direction, for example, due to gravity, material expansion, or external mechanical vibration; 2. Combined with Figure 10 b. When the trough solar collector performs single-axis tracking of the sun, it is in an inclined state. At this time, the offset corresponding to the above calculation method is along the rod direction. It can be decomposed into horizontal and vertical offsets, so that both horizontal and vertical offsets can be considered.

[0184] Taking the downward displacement along the rod direction of a tilted trough solar collector as an example, as shown in the figure: Firstly, when the trough solar collector is tilted, the collector tubes are fixed by the rod, and if a certain displacement occurs, slippage along the rod direction is more likely to occur. To comprehensively consider the horizontal and vertical displacement of the collector tubes, the total displacement can be decomposed, such as... Figure 10 As shown,

[0185]

[0186]

[0187] in, The angle between the rod and the horizontal direction; The angle between the rod and the vertical direction; for scenarios where the horizontal offset is easy to measure, the following can be used: ,Right now Where x is the horizontal offset of the heat collection tube; Let O2C be the angle between the rod and the horizontal direction, and let O2C = b * r, where b is the coefficient between OC and radius r. A coefficient b of 0.92 to 0.99 is recommended. ， Right now ， In the formula, OO2 is the vertical downward offset l2 between the center O2 of the heat collection tube and the focal point of the parabolic primary reflector. Given the horizontal offset, l2 can be deduced, and then by the cosine theorem, we have: Substitute ,have:

[0188]

[0189] The position d of the secondary reflector is,

[0190]

[0191] For scenarios where vertical offset is easy to measure, the following method can be used: ,Right now , where y is the vertical offset of the heat collection tube; Let O2C be the angle between the rod and the vertical direction; let O2C = b * r; where b is the coefficient between OC and radius r, and the recommended coefficient b is 0.92~0.99. ， Right now ， In the formula, OO2 is the vertical downward offset l2 between the center O2 of the heat collection tube and the focal point of the parabolic primary reflector. Given the vertical offset, l2 can be deduced, and then by the cosine theorem, we have:

[0192] Substitute have:

[0193]

[0194] The position d of the secondary reflector is,

[0195]

[0196] Regarding the size and location of the frequency divider: Considering the optical characteristics of the frequency divider itself (short-wave reflection, long-wave transmission), its obstruction of incident light should be minimized, allowing light to enter from the bottom as much as possible. This satisfies the condition that long-wave transmission is absorbed by the collector tubes, and short-wave reflection is received by the photovoltaic panel. Considering material savings and the optical characteristics of the frequency divider, to ensure that the trough collector can receive and reflect the entire solar spectrum before frequency division, the size of the frequency divider should be set so that it intersects the line connecting the edge point and the focal point of the trough collector. Figure 3As shown, the farther away from the solar collector tube, the more material is needed, and the closer to the tube, the less material is needed. Considering that in reality, the frequency divider cannot achieve perfect short-wave reflection and long-wave transmission of sunlight, there will always be some absorption of light and heat generation. This heat generation will have a negative impact on the photovoltaic panel and reduce its power generation efficiency. However, the heat generation has certain advantages for the solar collector tube itself. In summary, the frequency divider should be arranged at a position perpendicular to and tangent to the edge point of the central axis of the solar collector tube. The specific shape should be a parabola that satisfies the equation of reflection through the same focal point after light concentration.

[0197] Regarding the size and location settings of the photovoltaic panels: Based on the simulation of TracePro software, a large amount of light is incident, and then the reflection band of the frequency divider is set. It can be observed that the light will be concentrated after the second reflection of the frequency divider. The main concentration position is the light band formed directly below the frequency divider, and the area is slightly wider than the frequency divider. This conforms to the optical condition that the size of the photovoltaic panel and the frequency divider are proportional.

[0198] While the present invention has been disclosed above, its scope of protection is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications will fall within the scope of protection of the present invention.

Claims

1. A heating method for a large temperature difference energy storage heating system based on the full spectrum utilization of solar energy, characterized in that: The large temperature difference energy storage heating system includes a trough collector (1), a photovoltaic panel (2), a frequency divider (3), a collector tube (4), a first oil circulation pump (5), a generator (6), a first heat storage tank (7), a second oil circulation pump (8), a heat exchanger (9), a second heat storage tank (10), a third oil circulation pump (11), a third heat storage tank (12), an energy storage converter (13), an ejector (14), a compressor (15), a condenser (16), a liquid storage tank (17), a throttle valve (18), an evaporator (19), a refrigerant circulation pump (20), a first regulating valve (30), a second regulating valve (31), a third regulating valve (32), a fourth regulating valve (33), a fifth regulating valve (34), and a sixth regulating valve (35). The oil outlet of the heat collection tube (4) is connected to the oil inlet of the first oil circulation pump (5), the oil outlet of the first oil circulation pump (5) is connected to the oil inlet of the generator (6), the oil outlet of the generator (6) is connected to the oil inlet of the first heat storage tank (7), the oil outlet of the first heat storage tank (7) is connected to the oil inlet of the second oil circulation pump (8), a sixth regulating valve (35) is provided on the oil outlet pipeline of the first heat storage tank (7), the oil outlet of the second oil circulation pump (8) is connected to the oil inlet of the heat exchanger (9), and the heat exchanger... The oil outlet of heat exchanger (9) is connected to the oil inlet of the second heat storage tank (10). A fifth regulating valve (34) is provided on the oil outlet pipeline of heat exchanger (9). The oil outlet of the second heat storage tank (10) is connected to the oil inlet of the third oil circulation pump (11). The oil outlet of the third oil circulation pump (11) is connected to the oil inlet of the evaporator (19). The oil outlet of the evaporator (19) is connected to the oil inlet of the third heat storage tank (12). The oil outlet of the third heat storage tank (12) is connected to the oil inlet of the heat collection tube (4). The outlet of the generator (6) is connected to the high-pressure inlet of the ejector (14), and the outlet of the evaporator (19) is connected to the low-pressure inlet of the ejector (14) and the inlet of the compressor (15). A second regulating valve (31) is provided on the low-pressure inlet pipe of the ejector (14), and a fourth regulating valve (33) is provided on the inlet pipe of the compressor (15). The outlet of the compressor (15) and the outlet of the ejector (14) merge and are connected to the inlet of the condenser (16). The liquid outlet pipe of 5) is equipped with a third regulating valve (32), the liquid outlet pipe of ejector (14) is equipped with a first regulating valve (30), the liquid outlet of condenser (16) is connected to the liquid inlet of storage tank (17), the liquid outlet of storage tank (17) is connected to the liquid inlet of throttle valve (18) and the liquid inlet of refrigerant circulation pump (20) respectively, the liquid outlet of throttle valve (18) is connected to the liquid inlet of evaporator (19), and the liquid outlet of refrigerant circulation pump (20) is connected to the liquid inlet of generator (6). Both the heat exchanger (9) and the condenser (16) are provided with an inlet and an outlet on the other side. When the number of trough collectors (1) is at least 2, the trough collectors (1) are evenly distributed, each trough collector (1) is equipped with a heat collection tube (4), multiple heat collection tubes (4) are connected in series, at least one trough collector (1) is connected to a photovoltaic panel (2), the photovoltaic panel (2) is connected to an energy storage converter (13), and the energy storage converter (13) is connected to a compressor (15), a first oil circulation pump (5), a second oil circulation pump (8), a third oil circulation pump (11), and a refrigerant circulation pump (20); The heating methods include two-stage heating and three-stage heating; In the case of three-level heating, in the initial state, the first heat storage tank (7) contains 0 parts of heat transfer oil, the second heat storage tank (10) contains 2 parts of heat transfer oil, and the third heat storage tank (12) contains 1 part of heat transfer oil. In the first stage, the first regulating valve (30) and the second regulating valve (31) are opened, and the third regulating valve (32), the fourth regulating valve (33), the fifth regulating valve (34) and the sixth regulating valve (35) are closed. The trough collector (1) concentrates and reflects sunlight to the frequency divider (3). After frequency division by the frequency divider (3), short-wave reflection acts on the photovoltaic panel (2), generating electrical energy, which is then stored in the energy storage converter (13). The electrical energy in the energy storage converter (13) directly drives the first oil circulation pump (5), the third oil circulation pump (11), and the refrigerant circulation pump (20). Long-wave transmission acts on the collector tube (4) to heat the heat transfer oil. The heat acts on the generator (6) as the driving heat source of the jet heat pump. At the same time, the low-temperature heat transfer oil in the second heat storage tank (10) serves as a low-temperature heat source to drive the jet heat pump circulation, ensuring the heating operation. After the jet heat pump cycle, in the final state, the first heat storage tank (7) contains 2 parts of heat transfer oil, the second heat storage tank (10) contains 0 parts of heat transfer oil, and the third heat storage tank (12) contains 1 part of heat transfer oil. In the second stage, the fifth regulating valve (34) and the sixth regulating valve (35) are opened, and the first regulating valve (30), the second regulating valve (31), the third regulating valve (32) and the fourth regulating valve (33) are closed. The stored electrical energy in the energy storage converter (13) is used as the power source for the second oil circulation pump (8), which drives the high-temperature heat transfer oil in the first heat storage tank (7) to directly supply heat to the outside through the heat exchanger (9). The low-temperature heat transfer oil after heat exchange flows back to the second heat storage tank (10), ensuring the heating operation. After direct heat exchange and heating, in the final state, the first heat storage tank (7) contains 0 parts of heat transfer oil, the second heat storage tank (10) contains 2 parts of heat transfer oil, and the third heat storage tank (12) contains 1 part of heat transfer oil. In the third stage, the third regulating valve (32) and the fourth regulating valve (33) are opened, and the first regulating valve (30), the second regulating valve (31), the fifth regulating valve (34) and the sixth regulating valve (35) are closed. The stored electrical energy in the energy storage converter (13) is used as the power source for the compressor (15) to drive the compression heat pump cycle, which uses the low-temperature heat transfer oil in the second heat storage tank (10) as a low-grade heat source, to ensure heating operation. After being heated by a compression heat pump, in the final state, the first heat storage tank (7) contains 0 parts of heat transfer oil, the second heat storage tank (10) contains 1 part of heat transfer oil, and the third heat storage tank (12) contains 2 parts of heat transfer oil. The next time the jet heat pump is used for heating, pumps with different speeds are used to return the oil volume in each tank to the initial state of the jet heat pump heating, forming a cycle.

2. The heating method of the large temperature difference energy storage heating system based on the full spectrum utilization of solar energy according to claim 1, characterized in that: In the secondary heating stage, in the initial state, the first heat storage tank (7) contains 0 parts of heat transfer oil, the second heat storage tank (10) contains 2 parts of heat transfer oil, and the third heat storage tank (12) contains 1 part of heat transfer oil. During the daytime, open the first regulating valve (30) and the second regulating valve (31), and close the third regulating valve (32), the fourth regulating valve (33), the fifth regulating valve (34) and the sixth regulating valve (35). The trough collector (1) concentrates and reflects sunlight to the frequency divider (3). After frequency division by the frequency divider (3), short-wave reflection acts on the photovoltaic panel (2), generating electrical energy, which is then stored in the energy storage converter (13). The electrical energy in the energy storage converter (13) directly drives the first oil circulation pump (5), the third oil circulation pump (11), and the refrigerant circulation pump (20). Long-wave transmission acts on the collector tube (4) to heat the heat transfer oil. The heat acts on the generator (6) as the driving heat source of the jet heat pump. At the same time, the low-temperature heat transfer oil in the second heat storage tank (10) serves as a low-temperature heat source to drive the jet heat pump circulation, ensuring heating during the day. After the jet heat pump cycle, in the final state, the first heat storage tank (7) contains 2 parts of heat transfer oil, the second heat storage tank (10) contains 0 parts of heat transfer oil, and the third heat storage tank (12) contains 1 part of heat transfer oil. At night, open the fifth regulating valve (34) and the sixth regulating valve (35), and close the first regulating valve (30), the second regulating valve (31), the third regulating valve (32) and the fourth regulating valve (33). At night, the stored electrical energy in the energy storage converter (13) is used as the power source for the second oil circulation pump (8) to drive the high-temperature heat transfer oil in the first heat storage tank (7) to directly supply heat to the outside through the heat exchanger (9). The low-temperature heat transfer oil after heat exchange flows back to the second heat storage tank (10) to ensure the heating conditions at night. After direct heat exchange and heating, in the final state, the first heat storage tank (7) has 0 parts of heat transfer oil, the second heat storage tank (10) has 2 parts of heat transfer oil, and the third heat storage tank (12) has 1 part of heat transfer oil, returning to the initial oil quantity and forming a cycle; In extreme weather conditions, the stored electrical energy in the energy storage converter (13) is directly used as the power source for the compressor (15) to drive the compression heat pump cycle that uses air as a low-grade heat source, ensuring the heating operation.

3. A heating method for a large temperature difference energy storage heating system based on the full spectrum utilization of solar energy, characterized in that: The large temperature difference energy storage heating system includes a first oil circulation pump (5), a generator (6), a first heat storage tank (7), a second oil circulation pump (8), a heat exchanger (9), a second heat storage tank (10), a third oil circulation pump (11), a third heat storage tank (12), an energy storage converter (13), an ejector (14), a compressor (15), a condenser (16), a liquid storage tank (17), a throttle valve (18), an evaporator (19), a refrigerant circulation pump (20), a first regulating valve (30), a second regulating valve (31), a third regulating valve (32), a fourth regulating valve (33), a fifth regulating valve (34), and a sixth regulating valve (35). The oil outlet of the heat collection tube (4) is connected to the oil inlet of the first oil circulation pump (5), the oil outlet of the first oil circulation pump (5) is connected to the oil inlet of the generator (6), the oil outlet of the generator (6) is connected to the oil inlet of the first heat storage tank (7), the oil outlet of the first heat storage tank (7) is connected to the oil inlet of the second oil circulation pump (8), a sixth regulating valve (35) is provided on the oil outlet pipeline of the first heat storage tank (7), the oil outlet of the second oil circulation pump (8) is connected to the oil inlet of the heat exchanger (9), and the heat exchanger... The oil outlet of heat exchanger (9) is connected to the oil inlet of the second heat storage tank (10). A fifth regulating valve (34) is provided on the oil outlet pipeline of heat exchanger (9). The oil outlet of the second heat storage tank (10) is connected to the oil inlet of the third oil circulation pump (11). The oil outlet of the third oil circulation pump (11) is connected to the oil inlet of the evaporator (19). The oil outlet of the evaporator (19) is connected to the oil inlet of the third heat storage tank (12). The oil outlet of the third heat storage tank (12) is connected to the oil inlet of the heat collection tube (4). The liquid outlet of the generator (6) is connected to the high-pressure liquid inlet of the ejector (14). The liquid outlet of the compressor (15) is connected to the liquid inlet of the second ejector refrigerant line (86) and the liquid inlet of the fourth gaseous refrigerant line (87), respectively. The second ejector refrigerant line (86) is equipped with a second regulating valve (31), and the fourth gaseous refrigerant line (87) is equipped with a third regulating valve (32). The liquid outlet of the ejector (14) and the liquid outlet of the fourth gaseous refrigerant line (87) merge and are connected to the liquid inlet of the condenser (16). The liquid outlet pipe of the ejector (14) is equipped with a first... The outlet of the condenser (16) is connected to the inlet of the liquid storage tank (17), the outlet of the liquid storage tank (17) is connected to the inlet of the throttle valve (18), the outlet of the throttle valve (18) is connected to the inlet of the evaporator (19), a fourth regulating valve (33) is provided on the outlet pipe of the evaporator (19), the outlet of the evaporator (19) is connected to the inlet of the compressor (15), the outlet on the other side of the liquid storage tank (17) is connected to the inlet of the refrigerant circulation pump (20), and the outlet of the refrigerant circulation pump (20) is connected to the inlet of the generator (6). Both the heat exchanger (9) and the condenser (16) are provided with an inlet and an outlet on the other side. When the number of trough collectors (1) is at least 2, the trough collectors (1) are evenly distributed, each trough collector (1) is equipped with a heat collection tube (4), multiple heat collection tubes (4) are connected in series, at least one trough collector (1) is connected to a photovoltaic panel (2), the photovoltaic panel (2) is connected to an energy storage converter (13), and the energy storage converter (13) is connected to a compressor (15), a first oil circulation pump (5), a second oil circulation pump (8), a third oil circulation pump (11), and a refrigerant circulation pump (20); The heating methods include two-stage heating and three-stage heating; In the case of tertiary heating, in the initial state, the first heat storage tank (7) contains 0 parts of heat transfer oil, the second heat storage tank (10) contains 2 parts of heat transfer oil, and the third heat storage tank (12) contains 1 part of heat transfer oil. In the first stage, the first regulating valve (30) and the second regulating valve (31) are opened, and the third regulating valve (32), the fourth regulating valve (33), the fifth regulating valve (34) and the sixth regulating valve (35) are closed. The trough collector (1) concentrates sunlight and reflects it to the frequency divider (3). After the frequency divider (3) divides the frequency, the short-wave reflection acts on the photovoltaic panel (2), generating electrical energy, which is then stored in the energy storage converter (13). The electrical energy in the energy storage converter (13) directly drives the first oil circulation pump (5), the third oil circulation pump (11), and the refrigerant circulation pump (20). The long-wave transmission acts on the collector tube (4) to heat the heat transfer oil. The heat acts on the generator (6) as the driving heat source of the jet heat pump. At the same time, the low-temperature heat transfer oil in the second heat storage tank (10) is used as a low-temperature heat source. The compressor (15) acts as a jet auxiliary device to pressurize the ejector fluid, driving the compression-jet heat pump cycle to ensure the heating condition. After the compression-jet heat pump cycle, in the final state, the first heat storage tank (7) contains 2 parts of heat transfer oil, the second heat storage tank (10) contains 0 parts of heat transfer oil, and the third heat storage tank (12) contains 1 part of heat transfer oil. In the second stage, the fifth regulating valve (34) and the sixth regulating valve (35) are opened, and the first regulating valve (30), the second regulating valve (31), the third regulating valve (32) and the fourth regulating valve (33) are closed. The stored electrical energy in the energy storage converter (13) is used as the power source for the second oil circulation pump (8), which drives the high-temperature heat transfer oil in the first heat storage tank (7) to directly supply heat to the outside through the heat exchanger (9). The low-temperature heat transfer oil after heat exchange flows back to the second heat storage tank (10), ensuring the heating operation. After direct heat exchange and heating, in the final state, the first heat storage tank (7) contains 0 parts of heat transfer oil, the second heat storage tank (10) contains 2 parts of heat transfer oil, and the third heat storage tank (12) contains 1 part of heat transfer oil. In the third stage, the third regulating valve (32) and the fourth regulating valve (33) are opened, and the first regulating valve (30), the second regulating valve (31), the fifth regulating valve (34) and the sixth regulating valve (35) are closed. The stored electrical energy in the energy storage converter (13) is used as the power source for the compressor (15) to drive the compression heat pump cycle, which uses the low-temperature heat transfer oil in the second heat storage tank (10) as a low-grade heat source, to ensure heating operation. After being heated by a compression heat pump, in the final state, the first heat storage tank (7) contains 0 parts of heat transfer oil, the second heat storage tank (10) contains 1 part of heat transfer oil, and the third heat storage tank (12) contains 2 parts of heat transfer oil. The next time the jet heat pump is used for heating, pumps with different speeds are used to return the oil volume in each tank to the initial state of the jet heat pump heating, forming a cycle.

4. The heating method of the large temperature difference energy storage heating system based on the full spectrum utilization of solar energy according to claim 3, characterized in that: In the secondary heating stage, in the initial state, the first heat storage tank (7) contains 0 parts of heat transfer oil, the second heat storage tank (10) contains 2 parts of heat transfer oil, and the third heat storage tank (12) contains 1 part of heat transfer oil. During the daytime, open the first regulating valve (30), the second regulating valve (31) and the fourth regulating valve (33), and close the third regulating valve (32), the fifth regulating valve (34) and the sixth regulating valve (35). The trough collector (1) concentrates and reflects sunlight to the frequency divider (3). After frequency division by the frequency divider (3), short-wave reflection acts on the photovoltaic panel (2), generating electrical energy, which is then stored in the energy storage converter (13). The electrical energy in the energy storage converter (13) directly drives the first oil circulation pump (5), the third oil circulation pump (11), and the refrigerant circulation pump (20). Long-wave transmission acts on the collector tube (4) to heat the heat transfer oil. The heat acts on the generator (6) as the driving heat source of the jet heat pump. At the same time, the low-temperature heat transfer oil in the second heat storage tank (10) serves as a low-temperature heat source. The compressor (15) acts as an auxiliary device for the jet to pressurize the ejector fluid, driving the compression-jet heat pump cycle to ensure heating during the day. After the compression-jet heat pump cycle, in the final state, the first heat storage tank (7) contains 2 parts of heat transfer oil, the second heat storage tank (10) contains 0 parts of heat transfer oil, and the third heat storage tank (12) contains 1 part of heat transfer oil. At night, open the fifth regulating valve (34) and the sixth regulating valve (35), and close the first regulating valve (30), the second regulating valve (31), the third regulating valve (32) and the fourth regulating valve (33). At night, the stored electrical energy in the energy storage converter (13) is used as the power source for the second oil circulation pump (8), which drives the high-temperature heat transfer oil in the first heat storage tank (7) to directly supply heat to the outside through the heat exchanger (9). The low-temperature heat transfer oil after heat exchange flows back to the second heat storage tank (10), ensuring the heating operation at night. After direct heat exchange and heating, in the final state, the first heat storage tank (7) has 0 parts of heat transfer oil, the second heat storage tank (10) has 2 parts of heat transfer oil, and the third heat storage tank (12) has 1 part of heat transfer oil, returning to the initial oil quantity and forming a cycle; In extreme weather conditions, the stored electrical energy in the energy storage converter (13) is directly used as the power source for the compressor (15) to drive the compression heat pump cycle that uses air as a low-grade heat source, ensuring the heating operation.

5. The heating method of the large temperature difference energy storage heating system based on the full spectrum utilization of solar energy according to claim 1 or 3, characterized in that: The trough-type solar collector (1) includes an arc-shaped secondary reflector, a parabolic primary reflector, and a solar collector tube. The central axis of the solar collector tube coincides with the focal line of the parabolic primary reflector. The cross-sections of the parabolic primary reflector and the arc-shaped secondary reflector are both arc-shaped. The arc-shaped secondary reflector is located above the solar collector tube, and the openings of the parabolic primary reflector and the arc-shaped secondary reflector are arranged opposite to each other.

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