Solar heat supply and power generation system

Abstract

The invention discloses a solar heat supply and power generation system which comprises a solar heat collection pipe for collecting solar energy to heat circulating water passing through the solar heat collection pipe so as to obtain heated water; the heat pump unit performs circulating heat exchange by utilizing heating water and a heating medium to obtain a high-temperature heating medium; the generator set uses the high-temperature heating medium to work to generate electric energy and stores the electric energy in the storage battery; the storage battery provides electric energy for the heat using end. And the hot water storage tank is used for receiving the heating water subjected to heat exchange of the heat pump unit, supplementing water according to loss and pumping the water to the solar heat collection pipe for circulation. Solar cogeneration is adopted, solar energy collected by the system is utilized for complementation of heat energy and electric energy, a distributed solar cogeneration energy station can be formed, electric energy and heat supply can be provided for a certain area, cascade and comprehensive utilization of energy is achieved, and the stability, practicability and economical efficiency of the system are high.

Description

Technical Field

[0001] The present invention relates to the technical field of utilizing solar energy for heating and power generation, and in particular to a solar energy heating and power generation system. Background Art

[0002] Solar medium and low temperature power generation routes can be adapted to local conditions and complemented by a variety of renewable energy sources to form distributed solar cogeneration energy stations, providing electricity and heat for a certain area, and achieving energy cascade and comprehensive utilization.

[0003] By utilizing low-cost, mature and reliable focused solar collection methods, steam with certain pressure parameters is generated to drive thermal power units to generate electricity and heat, thus realizing the combined heat and power solar energy thermal utilization energy supply. This model is very popular in economic parks, coastal islands and other areas in the eastern economically developed regions where there is a huge gap in thermal and electric energy consumption.

[0004] The use of solar cogeneration, the stability, practicality and economy of the system are the requirements of the market space. Maintaining stable transmission power and making full use of solar energy have become the development direction of solar low-temperature thermal power generation and heating technology.

[0005] The patent document with document number CN103595347B discloses a solar thermal power generation system, which utilizes the power generation part of the thermal power generation method to supply heat, and can adjust the power supply part to the power supply part during off-peak hours, making the power supply more stable, while reducing the burden on the battery and extending the life of the battery; it adopts a technical solution of direct heat supply and heat storage under the premise of ensuring power supply demand. However, the thermal power generation method adopted in this application is to drive the electric heater to obtain hot water by the electric energy generated by the solar photovoltaic panel, and the hot water obtained by this method has low efficiency and large loss.

[0006] The patent document with document number CN107461954B discloses a solar photovoltaic combined cooling, heating and power composite energy system, including a solar cell temperature-controlled power supply and heating unit and a heat pump unit, wherein the solar cell temperature-controlled power supply and heating unit includes a power supply subunit and a heating subunit, wherein the power supply subunit is connected to the user circuit and the power grid, wherein the heating subunit is connected to the heat pump unit, the heat user unit and tap water, and wherein the heat pump unit is connected to the heat user unit and tap water. However, the load energy system in the solution needs to be connected to the power grid to supplement the electric energy, and the equipment is numerous and the operation is complicated, which is not suitable for use in remote areas. Summary of the invention

[0007] The purpose of the present invention is to provide a solar heating and power generation system, which adopts solar cogeneration to achieve the complementarity of its own heat energy and electric energy, and can form a distributed solar cogeneration energy station. The system has good stability and a wide range of applications.

[0008] The purpose of the present invention can be achieved through the following technical solution: A solar heating and power generation system, comprising:

[0009] Solar heat collecting tubes collect solar energy to heat circulating water passing through to obtain heated water;

[0010] The heat pump unit uses heated water to perform cyclic heat exchange with the heat medium to obtain high-temperature heat medium;

[0011] The generator set uses high-temperature heat medium to generate electricity and stores the electricity in a battery, which provides electricity to the heat-using end;

[0012] The hot water storage tank receives the heated water after heat exchange by the heat pump unit, replenishes water according to the loss, and pumps it to the solar collector tube for circulation.

[0013] Optionally, the generator set includes an expander and a generator. The high-temperature heat medium is converted into a low-temperature heat medium by the expander. The expander drives the generator to generate electricity. The low-temperature heat medium is pumped back to the heat pump unit for circulating heat exchange.

[0014] Optionally, a pipe 1 is connected between the solar heat collecting tube and the heat pump unit, a pipe 2 is connected between the heat pump unit and the hot water storage tank; a circulating pump 1 is installed between the hot water storage tank and the solar heat collecting tube, a pipe 3 is connected between the hot water storage tank and the circulating pump 1, and a pipe 4 is connected between the circulating pump 1 and the solar heat collecting tube;

[0015] A pipeline 7 is connected between the heat pump unit and the expander, a circulating pump 2 is installed between the expander and the heat pump unit, a pipeline 8 is connected between the expander and the circulating pump 2, a pipeline 9 is connected between the circulating pump 2 and the heat pump unit, and the hot water storage tank is connected to a water source for replenishment via a pipeline 12;

[0016] The high-temperature heat medium drives the generator to generate electrical energy through the expansion machine, and stores the electrical energy in the battery. The battery provides electrical energy for the heat-using end.

[0017] Optionally, the hot water storage tank is equipped with an electric heater 1 for heating circulating water, and the electric energy used by the electric heater 1 comes from a battery.

[0018] Optionally, a three-way valve 1 is installed on the pipeline 1, a branch valve port of the three-way valve 1 is connected to one end of the pipeline 5, and the other end of the pipeline 5 is connected to the pipeline 2;

[0019] A three-way valve three is installed on the pipeline four, and a branch valve port of the three-way valve three is connected to one end of the pipeline six, and the other end of the pipeline six is ​​connected to the common hot end.

[0020] Optionally, a thermometer is installed on the pipeline six.

[0021] Optionally, a condenser is further included for performing heat exchange between the supplementary water and the heat medium;

[0022] The pipeline 7 is provided with a three-way valve 2, the heat medium inlet of the condenser is connected to the branch valve port of the three-way valve 2 through the pipeline 10, the heat medium outlet of the condenser is connected to the pipeline 8 through the pipeline 11, the supplementary water inlet of the condenser is connected to the supplementary water source through the pipeline 12, and the supplementary water outlet of the condenser is connected to the hot water storage tank through the pipeline 13;

[0023] Wherein, the expander is provided with a rotation speed detection.

[0024] Optionally, the hot water storage tank is provided with a liquid level gauge, and the pipeline thirteen is installed with a valve four.

[0025] Optionally, the heat pump unit is equipped with an electric heater 2 for heating the circulating heat medium, and the electric energy used by the electric heater 2 comes from a battery.

[0026] Beneficial effects of the present invention:

[0027] 1. The present invention adopts solar cogeneration, and uses the solar energy collected by its own system to complement heat and electricity, which can form a distributed solar cogeneration energy station to provide electricity and heat in a certain area, realize energy cascade and comprehensive utilization, and the system has high stability, practicality and economy.

[0028] 2. The present invention sets a condenser. When the expander rotates too fast, the excessive temperature of the heat medium is supplemented with supplementary water through the condenser. While improving the protection of the expander, the excess heat energy is supplemented to the heat-using end through circulating water, so that the excess heat energy in the heat medium can be effectively utilized, avoiding heat energy waste and improving the overall operation efficiency of the system.

[0029] 3. The present invention can reduce the conditions for utilizing solar energy through cogeneration. When the intensity of sunlight is weak and the hot water circulation cannot meet the temperature required by the heat medium, the circulating water can be heated by pre-selected stored electric energy to ensure the circulating water temperature required for heat medium exchange. By self-production and self-use, the continuous collection of low-intensity sunlight can be guaranteed, which is beneficial to the continuous and stable operation of the system and ensures the continuous supply of thermal energy.

[0030] 4. The present invention collects solar energy through circulating water to achieve combined heat and power. Compared with relying on the electricity generated by solar photovoltaic panels to drive electric heaters to obtain hot water, the solar energy utilization efficiency is high.

[0031] 5. The solar energy comprehensive heat utilization energy supply mode of the cogeneration of heat and power of the present invention basically does not need to be connected to the external power grid to supplement electric energy, and the system equipment does not require complicated operations, and can be suitable for use in coastal islands or remote areas. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 A schematic diagram of the structure of a solar energy heating and power generation system of the present invention;

[0033] Figure 2 Another structural schematic diagram of a solar energy heating and power generation system of the present invention;

[0034] Figure 3 Another structural schematic diagram of a solar energy heating and power generation system of the present invention;

[0035] Figure 4 Another structural schematic diagram of a solar energy heating and power generation system of the present invention;

[0036] Figure 5 Another structural schematic diagram of a solar energy heating and power generation system of the present invention;

[0037] Figure 6 Another structural schematic diagram of a solar energy heating and power generation system of the present invention;

[0038] Figure 7 Another structural schematic diagram of a solar energy heating and power generation system of the present invention.

[0039] 110, solar heat collecting tube; 120, heat pump unit; 130, generator unit; 131, expander; 132, generator; 140, hot water storage tank; 150, battery; 160, electric heater 1; 170, circulating pump 1; 180, circulating pump 2; 190, condenser;

[0040] 210, pipeline one; 220, pipeline two; 230, pipeline three; 240, pipeline four; 250, pipeline five; 260, pipeline six; 270, pipeline seven; 280, pipeline eight; 290, pipeline nine; 2100, pipeline ten; 2110, pipeline eleven; 2120, pipeline twelve; 2130, pipeline thirteen;

[0041] 310, three-way valve one; 320, three-way valve two; 330, three-way valve three; 340, valve four;

[0042] 410. Thermometer; 420. Speed ​​detection; 430. Liquid level meter. DETAILED DESCRIPTION

[0043] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar symbols throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0044] The present invention discloses a solar energy heating and power generation system, such as Figure 1 As shown, including:

[0045] The solar heat collecting tube 110 collects solar energy to heat the circulating water passing through to obtain heated water;

[0046] The heat pump unit 120 utilizes the heating water to perform a circulating heat exchange with the heat medium to obtain a high-temperature heat medium;

[0047] The generator set 130 uses high-temperature heat medium to generate electric energy and stores the electric energy in the battery 150, and the battery 150 provides electric energy for the heat-using end;

[0048] The hot water storage tank 140 receives the heated water after heat exchange by the heat pump unit 120, replenishes the water according to the loss, and pumps the water to the solar heat collecting tube 110 for circulation.

[0049] The generator set 130 may be configured as follows: Figure 1 , 2 In the structure shown, the generator set 130 includes an expander 131 and a generator 132. The high-temperature heat medium is converted into a low-temperature heat medium by the expander 131. The expander 131 drives the generator 132 to generate electricity. The low-temperature heat medium is pumped back to the heat pump unit 120 for circulating heat exchange.

[0050] Embodiment 1, as Figure 2 As shown, the present invention discloses a solar heating and power generation system, and the main operation process of the system is as follows: the heating water obtained after being heated by the solar heat collecting tube 110 enters the heat pump unit 120 through the pipeline 1 210 to heat exchange and heat the heat medium, and the temperature of the heating water decreases after the heat exchange of the heat pump unit 120, and flows back to the hot water storage tank 140 through the pipeline 220, and the hot water in the hot water storage tank 140 reaches the circulation pump 1 170 through the pipeline 3 230. After the hot water is pressurized by the circulation pump 1 170, it goes to the solar heat collecting tube 110 through the pipeline 4 240 to continue to heat up. At the same time, the hot water storage tank 140 is connected to the supplementary water source through the pipeline 12 2120, and water is replenished according to the water circulation loss.

[0051] The high-temperature heat medium heated by the heat pump unit 120 enters the generator set 130 through the pipeline 270. The generator set 130 uses the high-temperature heat medium to generate electricity, and transmits the electricity to the battery 150 for storage. The battery 150 provides electricity for the heat-using end.

[0052] The high-temperature heat medium is converted into low-temperature heat medium by the expander 131, and the low-temperature heat medium reaches the circulation pump 2 180 through the pipeline 8 280. The low-temperature heat medium is pumped by the circulation pump 2 180 through the pipeline 9 290 back to the heat pump unit 120 to continue heat exchange and heating.

[0053] By collecting solar energy through circulating water, combined heat and power are achieved. By using a low-cost, relatively mature and reliable focused heat collection method, steam with certain pressure parameters is generated to drive the thermal power unit to generate electricity and heat, thereby realizing the comprehensive thermal utilization of solar energy. Compared with relying on the electricity generated by solar photovoltaic panels to drive electric heaters to obtain hot water, the utilization efficiency of solar energy is high.

[0054] Embodiment 2, as Figure 3 As shown, based on Example 1, a three-way valve 1 310 is installed on pipeline 1 210 , and the branch valve port of the three-way valve 1 310 is connected to one end of pipeline 5 250 , and the other end of pipeline 5 250 is connected to pipeline 2 220 .

[0055] At the same time, a three-way valve three 330 is installed on the pipeline four 240, and the branch valve port of the three-way valve three 330 is connected to one end of the pipeline six 260, and the other end of the pipeline six 260 is connected to the common hot end.

[0056] When in use, by controlling the three-way valve 1 310 and the three-way valve 3 330, the circulating water can flow back directly to the hot water storage tank 140 without passing through the heat pump unit 120, so that the hot water can be directly provided to the heat-using end, thereby enriching the heat energy supply mode and facilitating the repair and maintenance of the heat pump unit 120. Furthermore, by setting a thermometer T410 on the pipe six, the temperature of the hot water supply can be checked and the supply can be adjusted according to the temperature.

[0057] Embodiment 3, as Figure 4 As shown, based on Embodiment 1 or 2, the system further includes a condenser 190, and the condenser 190 is used to perform heat exchange between the supplementary water and the heat medium;

[0058] The installation of the condenser 190 can be achieved by installing a three-way valve 2 320 on the pipeline 7 270, so that the high-temperature heat medium enters the heat medium inlet of the condenser 190 through the pipeline 10 2100, and the make-up water also enters the make-up water inlet of the condenser 190 through the pipeline 12 2120. The high-temperature heat medium and the make-up water exchange heat in the condenser 190. After the temperature of the make-up water is increased, it enters the hot water storage tank 140 through the make-up water outlet of the condenser 190 and the pipeline 13 2130. A liquid level meter 430 can be set on the hot water storage tank 140, and a valve 4 340 can be installed on the pipeline 13 2130. By checking the liquid level meter 430, the amount of make-up water of the valve 4 340 can be controlled. After the temperature of the high-temperature heat medium is reduced, it flows into the pipeline 8 280 through the heat medium outlet of the condenser 190 and the pipeline 11 2110 to continue the heat medium circulation. At the same time, a speed detection 420 can be set on the expander 131.

[0059] When in use, the speed detection 420 is interlocked with the three-way valve 2 320. When the speed detection 420 detects that the speed of the expander 131 is too fast, the three-way valve 2 320 can be opened to lead the heat medium to the condenser 190. The heat medium is cooled by the condenser 190 and then flows into the pipeline 8 280 for circulation, thereby improving the protection of the expander 131 and preventing the expander 131 from malfunctioning due to excessive heat medium and excessive speed of the expander 131. At the same time, the heat medium is used to heat the make-up water, so that energy is effectively utilized and the waste of heat medium energy is avoided.

[0060] Embodiment 4, as Figure 5 As shown, an electric heater 160 for heating circulating water is installed in the hot water storage tank 140. The electric energy used by the electric heater 160 comes from the battery 150. A thermometer 410 can be installed on the pipe 260, and the hot water temperature can be observed through the thermometer 410.

[0061] By checking the thermometer 410, when the temperature of the hot water in the pipe six 260 cannot meet the demand of the heat-using end, the electric heater 160 can be turned on to heat the hot water in the hot water storage tank 140, so that the generated electrical energy can be fully utilized.

[0062] Embodiment 5, as Figure 6 As shown, an electric heater 2 (not shown) for heating the circulating heat medium is installed in the heat pump unit 120 , and the electric energy used by the electric heater 2 comes from the battery 150 .

[0063] When the temperature of the heat medium does not reach the operating temperature of the expander 131 through the heat exchange of the heat pump unit 120, the heat medium can be assisted by the electric heater 2 to further improve the rational use of the self-generated electricity of the system.

[0064] Further, such as Figure 1As shown, a liquid level gauge 430 can be provided in the hot water storage tank 140, and a valve four 340 is installed on the pipeline thirteen 2130. The liquid level gauge 430 can be interlocked with the valve four 340, the speed detection 420, the three-way valve three 330 and the three-way valve two 320 and other devices. For example, when the speed detection 420 detects that the speed of the expander 131 is too high, the three-way valve two 320 is opened and the three-way valve three 330 is opened. When the liquid level gauge 430 detects that the liquid level in the hot water storage tank 140 is too high, the three-way valve three 330 is opened to increase the hot water supply at the hot end, so that the condenser 190 can continue to work to cool the high-temperature heat medium.

[0065] Furthermore, if Figure 7 As shown, an electric heater three for heating supplementary water may be installed on the condenser 190 , and the electric energy used by the electric heater three comes from the battery 150 .

[0066] Providing more electric energy from the battery 150 to the electric heater 3 to heat the supplementary water can increase the temperature of the supplementary water, improve the thermal cycle efficiency, increase the heat supplement to the heat-using end, and make reasonable use of the electric energy generated by the system.

[0067] The present invention adopts solar cogeneration, and utilizes the solar energy collected by its own system to complement heat energy and electric energy, and can form a distributed solar cogeneration energy station to provide electricity and heat in a certain area, realize energy cascade and comprehensive utilization, and the system has high stability, practicality and economy.

[0068] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

[0069] It should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0070] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0071] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0072] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

Claims

1. A solar heating and power generation system, characterized in that: include: A solar heat collecting tube (110) collects solar energy to heat circulating water passing therethrough to obtain heated water; The heat pump unit (120) utilizes the heating water to perform a circulating heat exchange with the heat medium to obtain a high-temperature heat medium; The generator set (130) generates electric energy by using high-temperature heat medium, and stores the electric energy in a storage battery (150), wherein the storage battery (150) provides electric energy for the heat-using end; The hot water storage tank (140) receives the heated water after heat exchange by the heat pump unit (120), replenishes the water according to the loss, and pumps the water to the solar heat collecting pipe (110) for circulation.

2. A solar heating and power generation system according to claim 1, characterized in that: The generator set (130) comprises an expander (131) and a generator (132). The high-temperature heat medium is converted into a low-temperature heat medium by the expander (131). The expander (131) drives the generator (132) to generate electrical energy. The low-temperature heat medium is pumped back to the heat pump set (120) for circulating heat exchange.

3. A solar heating and power generation system according to claim 2, characterized in that: A pipe 1 (210) is connected between the solar heat collecting tube (110) and the heat pump unit (120), and a pipe 2 (220) is connected between the heat pump unit (120) and the hot water storage tank (140); a circulation pump 1 (170) is installed between the hot water storage tank (140) and the solar heat collecting tube (110), a pipe 3 (230) is connected between the hot water storage tank (140) and the circulation pump 1 (170), and a pipe 4 (240) is connected between the circulation pump 1 (170) and the solar heat collecting tube (110); A pipeline seven (270) is connected between the heat pump unit (120) and the expander (131), a circulating pump two (180) is installed between the expander (131) and the heat pump unit (120), a pipeline eight (280) is connected between the expander (131) and the circulating pump two (180), a pipeline nine (290) is connected between the circulating pump two (180) and the heat pump unit (120), and the hot water storage tank (140) is connected to a replenishing water source via a pipeline twelve (2120); The high-temperature heat medium drives the generator (132) to generate electric energy through the expansion machine (131), and the electric energy is stored in the storage battery (150). The storage battery (150) provides electric energy for the heat-using end.

4. A solar heating and power generation system according to claim 3, characterized in that: The hot water storage tank (140) is equipped with an electric heater (160) for heating circulating water, and the electric energy used by the electric heater (160) comes from a storage battery (150).

5. A solar heating and power generation system according to claim 4, characterized in that: A three-way valve one (310) is installed on the pipeline one (210), a branch valve port of the three-way valve one (310) is connected to one end of the pipeline five (250), and the other end of the pipeline five (250) is connected to the pipeline two (220); A three-way valve three (330) is installed on the pipeline four (240), and the branch valve port of the three-way valve three (330) is connected to one end of the pipeline six (260), and the other end of the pipeline six (260) is connected to the common hot end.

6. A solar heating and power generation system according to claim 5, characterized in that: A thermometer (410) is installed on the pipeline six (260).

7. A solar heating and power generation system according to any one of claims 1 to 6, characterized in that: Also included is a condenser (190) for performing heat exchange between the supplementary water and the heat medium; The pipeline seven (270) is provided with a three-way valve two (320); the heat medium inlet of the condenser (190) is connected to the branch valve port of the three-way valve two (320) through the pipeline ten (2100); the heat medium outlet of the condenser (190) is connected to the pipeline eight (280) through the pipeline eleven (2110); the supplementary water inlet of the condenser (190) is connected to the supplementary water source through the pipeline twelve (2120); and the supplementary water outlet of the condenser (190) is connected to the hot water storage tank (140) through the pipeline thirteen (2130); Wherein, the expander (131) is provided with a rotation speed detection (420).

8. A solar heating and power generation system according to claim 7, characterized in that: The hot water storage tank (140) is provided with a liquid level meter (430), and the pipeline thirteen (2130) is installed with a valve four (340).

9. A solar heating and power generation system according to claim 7, characterized in that: The heat pump unit (120) is equipped with a second electric heater for heating a circulating heat medium, and the electric energy used by the second electric heater comes from a storage battery (150).

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