Energy supply system based on solar power supply and control method

Abstract

The invention provides an energy supply system based on solar power supply and a control method, and relates to the technical field of energy supply equipment, and the energy supply system comprises a power supply system, a cold and heat supply system, a hot water supply system and a heat exchange system. The power supply system comprises a solar photovoltaic power generation device, an energy storage device and a power transmission line. The cold and heat supply system comprises a first cooling tower, a heat pump, a first circulating pipeline and a first supply pipeline; the hot water supply system comprises a second cooling tower, a heat pump water heater, a second circulating pipeline and a second supply pipeline; the heat exchange system comprises a waste heat exchanger, a heat source side pipeline and a heat absorption side pipeline. The electric power supply system can utilize solar energy to generate electric energy, the cold and heat supply system and the hot water supply system can supply heat and cold to external functional equipment by means of the electric power supply system, hot water can be provided for domestic water equipment, no harmful gas is generated, and the system is more environmentally friendly, lower in energy consumption and better in economic benefit.

Description

Technical Field

[0001] The present invention relates to the technical field of energy supply equipment, and in particular to an energy supply system and a control method based on solar power supply. Background Art

[0002] The global reserves of conventional fossil energy such as oil, coal, and natural gas are decreasing, and environmental problems are becoming more and more serious. Some existing functional equipment will use gas boilers to generate hot water or use the city grid to generate heat when heating is needed, such as when heating equipment or air conditioning equipment needs to supply heat. When cooling is needed, such as when air conditioning equipment needs to supply cooling, it will use the city grid to generate cold air. However, the flue gas emitted by gas boilers contains a large amount of atmospheric pollutants, consumes a lot of electricity and energy, has poor economic benefits, and is not conducive to achieving economic and low-carbon operation of the system. Summary of the invention

[0003] The present invention provides an energy supply system and control method based on solar power supply, which are used to solve the problem that some existing functional equipment in the prior art uses gas boilers or power grids for power supply when heating or cooling is required. However, the flue gas emitted by the gas boiler contains a large amount of components that pollute the atmosphere, the energy consumption is large, the economic benefits are poor, and it is not conducive to achieving economical and low-carbon operation of the system.

[0004] According to a first aspect of the present invention, there is provided an energy supply system based on solar power supply, comprising: An electric power supply system, the electric power supply system comprising: a solar photovoltaic power generation device, an energy storage device and a power transmission line, the solar photovoltaic power generation device and the energy storage device being electrically connected to the power transmission line; A cold and hot supply system, the cold and hot supply system comprising: a first cooling tower, a heat pump, a first circulation pipeline and a first supply pipeline, the first cooling tower and the heat pump are electrically connected to the power transmission line, the heat pump is connected to the first cooling tower via the first circulation pipeline, and the heat pump is connected to an external functional device via the first supply pipeline; A hot water supply system, the hot water supply system comprising: a second cooling tower, a heat pump water heater, a second circulation pipeline and a second supply pipeline, the second cooling tower and the heat pump water heater are electrically connected to the power transmission line, the heat pump water heater is connected to the second cooling tower via the second circulation pipeline, and the heat pump water heater is connected to an external domestic water device via the second supply pipeline; A heat exchange system, the heat exchange system comprising: a waste heat exchanger, a heat source side pipeline and a heat absorption side pipeline, the waste heat exchanger is connected to the first circulation pipeline via the heat source side pipeline, and the waste heat exchanger is connected to the second circulation pipeline via the heat absorption side pipeline.

[0005] According to a solar-powered energy supply system provided by the present invention, the first circulation pipeline includes a first circulation water outlet pipe and a first circulation water inlet pipe, the water outlet end of the first cooling tower is connected to the first water inlet end of the heat pump via the first circulation water outlet pipe, and the water inlet end of the first cooling tower is connected to the first water outlet end of the heat pump via the first circulation water inlet pipe.

[0006] According to a solar-powered energy supply system provided by the present invention, the first supply pipeline includes a first supply water outlet pipe and a first supply water inlet pipe, the second water outlet end of the heat pump is connected to the water inlet end of an external functional device via the first supply water outlet pipe, and the second water inlet end of the heat pump is connected to the water outlet end of an external functional device via the first supply water inlet pipe.

[0007] According to the present invention, a solar-powered energy supply system further comprises a water divider and a water collector. The water divider is arranged on the first water supply outlet pipe, and the water collector is arranged on the first water supply inlet end.

[0008] According to the present invention, a solar-powered energy supply system further includes a water treatment device, and the water treatment device is connected to the first water supply inlet pipe.

[0009] According to a solar-powered energy supply system provided by the present invention, the second circulation pipeline includes a second circulation water outlet pipe and a second circulation water inlet pipe, the water outlet end of the second cooling tower is connected to the first water inlet end of the heat pump water heater via the second circulation water outlet pipe, and the water inlet end of the second cooling tower is connected to the first water outlet end of the heat pump water heater via the second circulation water inlet pipe.

[0010] According to a solar-powered energy supply system provided by the present invention, the second supply pipeline includes a second supply water outlet pipe and a second supply water inlet pipe, the second water outlet end of the heat pump water heater is connected to the water inlet end of an external domestic water equipment via the second supply water outlet pipe, and the second water inlet end of the heat pump water heater is connected to the water outlet end of an external domestic water equipment via the second supply water inlet pipe.

[0011] According to an energy supply system based on solar power supply provided by the present invention, the heat source side pipeline includes a heat source side water inlet pipe and a heat source side water outlet pipe, the first circulating water inlet pipe is connected to the first water inlet end of the waste heat exchanger via the heat source side water inlet pipe, and the first circulating water outlet pipe is connected to the first water outlet end of the waste heat exchanger via the heat source side water outlet pipe.

[0012] According to a solar-powered energy supply system provided by the present invention, the heat absorption side pipeline includes a heat absorption side water inlet pipe and a heat absorption side water outlet pipe, the second circulation water inlet pipe is connected to the second water inlet end of the waste heat exchanger via the heat absorption side water inlet pipe, and the second circulation water outlet pipe is connected to the second water outlet end of the waste heat exchanger via the heat absorption side water outlet pipe.

[0013] According to a second aspect of the present invention, there is provided a control method for an energy supply system based on solar power supply according to any one of the first aspects of the present invention, the control method comprising: When it is necessary to supply heat to external functional equipment and provide hot water to external domestic water equipment without recovering waste heat, the heat pump and the heat pump water heater are powered, and the first circulation pipeline and the second circulation pipeline are in a flow state, and the heat source side pipeline and the heat absorption side pipeline are in a disconnected state; When it is necessary to provide cooling to external functional equipment and hot water to external domestic water equipment and recover waste heat at the same time, the heat pump and the heat pump water heater are powered, and the second circulation pipeline, the heat source side pipeline and the heat absorption side pipeline are in a flow state, and the first circulation pipeline is in a disconnected state; When it is necessary to provide hot water to external domestic water equipment without recovering waste heat, the heat pump water heater is powered and the second circulation pipeline is in a flow state, so that the first circulation pipeline, the heat source side pipeline and the heat absorption side pipeline are in a disconnected state.

[0014] The energy supply system based on solar power supply provided by the present invention includes an electricity supply system, a hot and cold supply system, a hot water supply system and a heat exchange system. When functional equipment such as heating equipment or air-conditioning equipment needs heating or cooling, or when domestic water equipment needs to provide hot water, the electricity supply system can use solar energy to generate electricity, and the hot and cold supply system and the hot water supply system can use the electricity supply system to provide heating and cooling to external functional equipment, and can provide hot water to domestic water equipment, which can meet the use needs. Compared with the traditional use of gas boilers or power grid power supply, it does not produce harmful gases, is more environmentally friendly, consumes less energy, has better economic benefits, and is conducive to achieving economical and low-carbon operation of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1It is a schematic diagram of the simplified structure of an energy supply system based on solar power supply according to one embodiment of the present invention.

[0017] Figure 2 It is a schematic structural diagram of an energy supply system based on solar power supply according to one embodiment of the present invention.

[0018] Figure 3 is a flow chart of a control method for a solar-powered energy supply system according to one embodiment of the present invention.

[0019] Reference numerals: 10. Power supply system; 11. Solar photovoltaic power generation equipment; 12. Energy storage equipment; 13. Transmission line; 14. Inverter; 20. Cold and hot supply system; 21. First cooling tower; 22. Heat pump; 23. First circulation pipeline; 24. First supply pipeline; 25. First water pump; 26. Second water pump; 27. Water distributor; 28. Water collector; 29. ​​Third water pump; 30. Hot water supply system; 31. Second cooling tower; 32. Heat pump water heater; 33. Second circulation pipeline; 34. Second supply pipeline; 35. Fourth water pump; 36. Fifth water pump; 40. Heat exchange system; 41. Waste heat exchanger; 42. Heat source side pipeline; 43. Heat absorption side pipeline; 50. Water treatment equipment; 51. Water replenishment constant pressure pump. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] In one embodiment of the present invention, a solar-powered energy supply system and control method are provided, the system includes: an electric power supply system, a cold and hot supply system, a hot water supply system and a heat exchange system, the electric power supply system can generate electric energy through solar energy, the generated electric energy can be stored, and can also be supplied to the cold and hot supply system and the hot water supply system, the cold and hot supply system can heat or cool external functional equipment during operation, the hot water supply system can provide heat to external domestic water equipment during operation, and the heat exchange system can recover the heat in the cold and hot supply system and transfer it to the hot water supply system. Figures 1 to 3 The figure further describes the energy supply system and control method based on solar power supply in this embodiment.

[0022] Specifically, if Figure 1 and Figure 2 As shown, the energy supply system based on solar power supply in this embodiment includes: an electricity supply system 10, a cold and hot supply system 20, a hot water supply system 30 and a heat exchange system 40.

[0023] The power supply system 10 includes: a solar photovoltaic power generation device 11, an energy storage device 12 and a transmission line 13, and the solar photovoltaic power generation device 11 and the energy storage device 12 are electrically connected to the transmission line 13; the cold and hot supply system 20 includes: a first cooling tower 21, a heat pump 22, a first circulation pipeline 23 and a first supply pipeline 24, and the first cooling tower 21 and the heat pump 22 are electrically connected to the transmission line 13, the heat pump 22 is connected to the first cooling tower 21 via the first circulation pipeline 23, and the heat pump 22 is connected to the external functional device via the first supply pipeline 24; the hot water supply system 30 includes: a second cooling tower 3 1. A heat pump water heater 32, a second circulation pipeline 33 and a second supply pipeline 34. The second cooling tower 31 and the heat pump water heater 32 are electrically connected to the transmission line 13. The heat pump water heater 32 is connected to the second cooling tower 31 via the second circulation pipeline 33. The heat pump water heater 32 is connected to an external domestic water device via the second supply pipeline 34. The heat exchange system 40 includes: a waste heat exchanger 41, a heat source side pipeline 42 and a heat absorption side pipeline 43. The waste heat exchanger 41 is connected to the first circulation pipeline 23 via the heat source side pipeline 42, and the waste heat exchanger 41 is connected to the second circulation pipeline 33 via the heat absorption side pipeline 43.

[0024] For example, Figure 2 As shown, the power supply system 10 in this embodiment includes: a solar photovoltaic power generation device 11 , an energy storage device 12 and a transmission line 13 .

[0025] The solar photovoltaic power generation equipment 11 can absorb solar energy and convert it into electrical energy. For example, the solar photovoltaic power generation equipment 11 includes a photovoltaic panel assembly, which is a power generation device that generates direct current when exposed to sunlight and is composed of solid photovoltaic cells made almost entirely of semiconductor materials (such as silicon). When the solar photovoltaic power generation equipment 11 generates electricity, it has the advantages of high efficiency, safety and reliability, mature technology, and easy maintenance.

[0026] The energy storage device 12 can store electrical energy, for example, the energy storage device 12 includes a lithium battery. The power transmission line 13 can be used to transmit electrical energy, for example, the power transmission line 13 may include a cable.

[0027] In this embodiment, the electric energy generated by the solar photovoltaic power generation device 11 using solar energy can be transmitted to the transmission line 13, and the electric energy in the transmission line 13 can enter the energy storage device 12 and be stored.

[0028] In one embodiment, Figure 2 As shown, the power supply system 10 further includes an inverter 14, which is arranged between the solar photovoltaic power generation device 11 and the transmission line 13. In actual use, the direct current generated by the solar photovoltaic power generation device 11 can be converted into alternating current under the modulation of the inverter 14, and then the alternating current is transmitted to the transmission line 13, that is, the electric energy transmitted in the transmission line 13 is alternating current.

[0029] In actual use, during the day, the solar photovoltaic power generation equipment 11 can generate electricity normally, and the generated electric energy is modulated by the inverter 14 and supplied to the transmission line 13, and then provided to the cold and hot supply system 20 and the hot water supply system 30. When there is surplus electric energy in the transmission line 13, this electric energy can be transmitted to the energy storage device 12 for storage. When the electric energy in the transmission line 13 is insufficient, the electric energy stored in the energy storage device 12 can be released. Alternatively, the transmission line 13 is directly connected to the mains system, and the insufficient electric energy is supplied by the energy storage device 12 or the mains system.

[0030] Accordingly, at night or when the solar photovoltaic power generation device 11 cannot generate electricity normally, the energy storage device 12 can supply power to the transmission line 13, or the transmission line 13 is directly connected to the mains system, and the mains system supplies power to the transmission line 13. In actual use, in order to take advantage of the low off-peak electricity price at night, realize power peak regulation, and save electricity costs, at night, the mains system can also directly supply power to the energy storage device 12 through the transmission line 13.

[0031] Therefore, the power supply system 10 in this embodiment includes the following four operating conditions: Under the first working condition: the solar photovoltaic power generation equipment 11 operates normally and transmits electric energy to the power transmission line 13 through the inverter 14 , and the power transmission line 13 directly supplies power to the cold and hot supply system 20 and the hot water supply system 30 .

[0032] Under the second working condition: the solar photovoltaic power generation equipment 11 operates normally and transmits electric energy to the transmission line 13 through the inverter 14, and the insufficient power supply is supplemented by the energy storage device 12 or the city power system.

[0033] Under the third working condition: the solar photovoltaic power generation equipment 11 cannot work normally, and the energy storage equipment 12 supplies power to the system.

[0034] Under the fourth working condition: the solar photovoltaic power generation equipment 11 cannot work normally, and the transmission line 13 is connected to the mains power system, which supplies power to the system and the energy storage device 12 at the same time.

[0035] That is to say, during the day, the power supply system 10 can use solar power generation to provide power for the normal operation of the system, and can drive the air source heat pump 22 to provide heating (cooling), and the excess power can be stored and regulated through the energy storage device 12; at night, the power supply system 10 can use the off-peak period to store power, and the stored power can drive the air source heat pump 22 to operate during the peak period during the day. Therefore, the power supply system 10 can make full use of the peak-valley electricity price difference and solar power generation to achieve economic and low-carbon operation of the system, with significant economic and social benefits.

[0036] For example, Figure 2 As shown, the cold and hot supply system 20 includes: a first cooling tower 21, a heat pump 22, a first circulation pipeline 23 and a first supply pipeline 24.

[0037] The first cooling tower 21 and the heat pump 22 are connected via the first circulation pipeline 23 and can form a fluid loop, the fluid in the first cooling tower 21 can flow into the heat pump 22 via the first circulation pipeline 23, and the fluid in the heat pump 22 from the first cooling tower 21 can flow back to the first cooling tower 21 via the first circulation pipeline 23. The external functional equipment is connected to the heat pump 22 via the first supply pipeline 24, the external fluid can flow into the heat pump 22 via the first supply pipeline 24, and the fluid from the outside in the heat pump 22 is supplied to the external functional equipment via the first supply pipeline 24.

[0038] The heat pump 22 in this embodiment is an air source heat pump 22, which has the advantages of high efficiency, safety and reliability, convenient energy supply adjustment, convenient maintenance and wide application.

[0039] In actual use, when the external functional equipment needs to heat, for example, when the heating equipment or air conditioning equipment needs to supply heat, the first fluid can circulate in the first cooling tower 21 and the heat pump 22 via the first circulation pipeline 23, and the external fluid can flow into the heat pump 22 via the first supply pipeline 24. In the heat pump 22, the first fluid transfers its own heat to the external fluid, and then the external fluid that has obtained heat is output to the external functional equipment via the first supply pipeline 24, so that the external functional equipment provides heat to the outside. Accordingly, the first fluid that has lost heat flows back to the first cooling tower 21 to obtain heat again, and then flows back to the heat pump 22, and the heat supply is circulated in this way.

[0040] When the external functional equipment needs to be cooled, for example, when the air conditioning equipment needs to provide cooling, the first fluid can circulate in the first cooling tower 21 and the heat pump 22 via the first circulation pipeline 23, and the external fluid can flow into the heat pump 22 via the first supply pipeline 24. In the heat pump 22, the first fluid will obtain the heat of the external fluid, and the external fluid that loses heat will be output to the external functional equipment via the first supply pipeline 24, so that the external functional equipment can provide cooling to the outside. Accordingly, the first fluid that obtains heat flows back to the first cooling tower 21 to cool down and reduce the temperature, and then flows back to the heat pump 22, so as to circulate and provide cooling.

[0041] It can be understood that the first cooling tower 21 can provide both cooling and heating. To meet this use requirement, the first cooling tower 21 can be an energy tower. In winter, the energy tower can use a carrier medium below the freezing point to efficiently extract the wet-bulb water heat energy below the freezing point, and input a small amount of high-quality energy through the energy tower heat pump 22 unit to achieve the transfer of low-temperature heat energy below the freezing point to a high-temperature position to achieve heating. In summer, due to the special design of the energy tower, it plays the role of an efficient cooling tower, discharging heat into the atmosphere to achieve refrigeration.

[0042] Optionally, the fluid circulating between the first cooling tower 21 and the heat pump 22 may be a glycol solution.

[0043] Therefore, the cold and hot supply system 20 in this embodiment includes the following two working conditions: In the first working condition: the heat pump 22 supplies heat to the external functional equipment through the first supply pipeline 24, and the first cooling tower 21 obtains heat.

[0044] In the second working condition: the heat pump 22 supplies cooling to the external functional equipment through the first supply pipeline 24, and the first cooling tower 21 releases heat.

[0045] Exemplarily, the hot water supply system 30 includes: a second cooling tower 31 , a heat pump water heater 32 , a second circulation pipeline 33 and a second supply pipeline 34 .

[0046] The second cooling tower 31 and the heat pump water heater 32 are connected via the second circulation pipeline 33 and can form a fluid loop. The fluid in the second cooling tower 31 can flow into the heat pump water heater 32 via the second circulation pipeline 33, and the fluid from the second cooling tower 31 in the heat pump water heater 32 can flow back to the second cooling tower 31 via the second circulation pipeline 33. The external domestic water equipment is connected to the heat pump water heater 32 via the second supply pipeline 34, and the external fluid can flow into the heat pump water heater 32 via the second supply pipeline 34. The fluid from the outside in the heat pump water heater 32 is supplied to the external domestic water equipment via the second supply pipeline 34.

[0047] In actual use, when external domestic water equipment needs to output hot water, for example, when the kitchen water equipment needs to provide hot water, the second fluid can circulate in the second cooling tower 31 and the heat pump water heater 32 via the second circulation pipeline 33, and the external fluid can flow into the heat pump water heater 32 via the second supply pipeline 34. In the heat pump water heater 32, the second fluid transfers its own heat to the external fluid, and the external fluid that obtains heat is output to the external domestic water equipment via the second supply pipeline 34, so that the external domestic water equipment can provide hot water. Accordingly, the second fluid that loses heat flows back to the second cooling tower 31 to regain heat, and then flows back to the heat pump water heater 32, and the heat supply is circulated in this way.

[0048] It can be understood that the second cooling tower 31 can also provide heat. To meet this usage requirement, similar to the first cooling tower 21, the second cooling tower 31 can be an energy tower.

[0049] Therefore, the hot water supply system 30 in this embodiment includes the following working conditions: In the first working condition: the heat pump water heater 32 supplies heat to the external domestic water equipment through the second supply pipeline 34, and the first cooling tower 21 obtains heat.

[0050] Exemplarily, the heat exchange system 40 includes: a waste heat exchanger 41 , a heat source side pipeline 42 and a heat absorption side pipeline 43 .

[0051] The first circulation pipeline 23 and the waste heat exchanger 41 are connected via the heat source side pipeline 42 and can form a fluid loop. The fluid in the first circulation pipeline 23 can flow into the waste heat exchanger 41 via the heat source side pipeline 42, and the fluid in the waste heat exchanger 41 from the first circulation pipeline 23 can flow back to the first circulation pipeline 23 via the heat source side pipeline 42.

[0052] The second circulation pipeline 33 and the waste heat exchanger 41 are connected via the heat absorption side pipeline 43 and can form a fluid loop. The fluid in the second circulation pipeline 33 can flow into the waste heat exchanger 41 via the heat absorption side pipeline 43, and the fluid from the second circulation pipeline 33 in the waste heat exchanger 41 can flow back to the second circulation pipeline 33 via the heat absorption side pipeline 43.

[0053] In actual use, when the heat of the first fluid in the first circulation pipeline 23 needs to be released through the first cooling tower 21, and at the same time, the heat of the second fluid in the second circulation pipeline 33 needs to be transferred to the second supply pipeline 34 through the heat pump water heater 32, the first fluid carrying the heat can enter the waste heat exchanger 41 through the heat source side pipeline 42. In the waste heat exchanger 41, the heat in the first fluid can be continuously transferred to the second fluid, and the heat in the first fluid can be recycled.

[0054] Therefore, the heat exchange system 40 in this embodiment includes the following two working conditions: Under the first working condition: when the heat pump 22 supplies cooling to the external functional equipment through the first supply pipeline 24 , the fluid in the first circulation pipeline 23 can flow into the waste heat exchanger 41 and be digested by the waste heat exchanger 41 .

[0055] Under the first working condition: when the heat pump 22 supplies cooling to external functional equipment through the first supply pipeline 24, and the heat pump 22 water heater provides hot water to external domestic water equipment through the second supply pipeline 34, the fluid in the first circulation pipeline 23 can flow into the waste heat exchanger 41. In the waste heat exchanger 41, the heat of the fluid in the first circulation pipeline 23 is transferred to the fluid in the second circulation pipeline 33, thereby realizing waste heat recovery.

[0056] Therefore, with the help of the energy supply system in this embodiment, when functional equipment such as heating equipment or air-conditioning equipment needs heating or cooling, or when domestic water equipment needs to provide hot water, the power supply system 10 can use solar energy to generate electricity, and the hot and cold supply system 20 and the hot water supply system 30 can use the power supply system 10 to provide heating and cooling to external functional equipment, and can provide hot water to domestic water equipment, which can meet the use needs. Compared with the traditional use of gas boilers or power grid power supply, it does not produce harmful gases, is more environmentally friendly, consumes less energy, has better economic benefits, and is conducive to achieving economical and low-carbon operation of the system.

[0057] Moreover, in the energy supply system, the power supply system 10 is equipped with solar photovoltaic power generation equipment 11 and energy storage equipment 12, which can meet the needs of power generation and power storage. At the same time, the heat supply system 20 and the hot water supply system 30 are provided with heat pumps 22, forming a near-zero-carbon integrated energy heating and cooling system, which is particularly suitable for heating, cooling, energy storage, power grid peak shifting and valley filling, power supply side balancing and other occasions in regional small and medium-sized office buildings.

[0058] Further, in one embodiment, in order to ensure that the fluid can circulate between the first cooling tower 21 and the heat pump 22, as shown in FIG. Figure 2 As shown, the first circulation pipeline 23 includes a first circulation water outlet pipe and a first circulation water inlet pipe. The water outlet end of the first cooling tower 21 is connected to the first water inlet end of the heat pump 22 via the first circulation water outlet pipe, and the water inlet end of the first cooling tower 21 is connected to the first water outlet end of the heat pump 22 via the first circulation water inlet pipe.

[0059] In actual use, the fluid in the first cooling tower 21 can enter the heat pump 22 through the first circulating water outlet pipe, and after heat exchange in the heat pump 22, the fluid can flow back to the first cooling tower 21 through the first circulating water inlet pipe.

[0060] Moreover, if Figure 2 As shown, a first water pump 25 is also provided on the first circulating water inlet pipe. The first water pump 25 is electrically connected to the power transmission line 13. The power transmission line 13 can supply power to the first water pump 25, so that the first water pump 25 drives the fluid to circulate continuously between the first cooling tower 21 and the heat pump 22.

[0061] In addition, if Figure 2 As shown, a valve EV1 is provided on one side of the first circulating water outlet pipe close to the water outlet of the first cooling tower 21, and a valve EV2 is provided on one side of the first circulating water inlet pipe close to the water inlet of the first cooling tower 21. By controlling the on-off of the valve EV1 and the valve EV2, the flow state of the fluid in the first circulating pipeline 23 can be controlled.

[0062] Further, in one embodiment, in order to ensure that the fluid can be effectively supplied to the external functional device, such as Figure 2 As shown, the first supply pipeline 24 includes a first supply water outlet pipe and a first supply water inlet pipe. The second water outlet end of the heat pump 22 is connected to the water inlet end of the external functional equipment via the first supply water outlet pipe, and the second water inlet end of the heat pump 22 is connected to the water outlet end of the external functional equipment via the first supply water inlet pipe.

[0063] In actual use, externally supplied fluids may enter the heat pump 22 via the first supply water inlet pipe, and these fluids may be provided to external functional devices via the first supply water outlet pipe after heat exchange in the heat pump 22 .

[0064] Moreover, if Figure 2 As shown, a second water pump 26 is also provided on the first water supply inlet pipe. The second water pump 26 is electrically connected to the power transmission line 13 . The power transmission line 13 can supply power to the second water pump 26 , so that the second water pump 26 drives the fluid to be continuously supplied to the heat pump 22 .

[0065] Further, in one embodiment, Figure 2 As shown, the energy supply system further includes a water distributor 27 and a water collector 28. The water distributor 27 is arranged on the first supply water outlet pipe, and the water collector 28 is arranged on the first supply water inlet end.

[0066] It can be understood that, through the above arrangement, the externally supplied fluid can be collected and temporarily stored in the water collector 28, and then the second water pump 26 pumps the fluid in the water collector 28 to the heat pump 22. Correspondingly, the fluid after heat replacement in the heat pump 22 can enter the water distributor 27, and then the water distributor 27 supplies these fluids to external functional devices.

[0067] Moreover, a third water pump 29 can be provided downstream of the water divider 27. The third water pump 29 is electrically connected to the power transmission line 13. The power transmission line 13 can supply power to the third water pump 29. In actual use, the third water pump 29 is used to pump the fluid in the water divider 27 to external functional equipment.

[0068] In addition, the first water supply inlet pipe and the first water supply outlet pipe may also be connected to other external energy equipment, such as gas equipment, and the other external energy equipment may heat the fluid in the first water supply inlet pipe and the first water supply outlet pipe.

[0069] Further, in one embodiment, Figure 2 As shown, the energy supply system further includes a water treatment device 50, which is connected to the first water supply inlet pipe.

[0070] Exemplarily, the water treatment equipment 50 is connected to the first supply water inlet pipe via a water replenishment pipeline, and the connection between the water replenishment pipeline and the first supply water inlet pipe can be located downstream of the water collector 28. The water treatment equipment 50 can soften the fluid, and when the fluid in the first supply water inlet pipe is insufficient, the water treatment equipment 50 can provide fluid to the first supply water inlet pipe in a timely manner.

[0071] For example, a water replenishment constant pressure pump 51 may be provided on the water replenishment pipeline, and the water replenishment constant pressure pump 51 can pump the fluid in the water treatment equipment 50 to the first supply water inlet pipe according to the control signal.

[0072] Further, in one embodiment, in order to ensure that the fluid can circulate between the second cooling tower 31 and the heat pump water heater 32, as shown in FIG. Figure 2 As shown, the second circulation pipeline 33 includes a second circulation water outlet pipe and a second circulation water inlet pipe. The water outlet end of the second cooling tower 31 is connected to the first water inlet end of the heat pump water heater 32 via the second circulation water outlet pipe, and the water inlet end of the second cooling tower 31 is connected to the first water outlet end of the heat pump water heater 32 via the second circulation water inlet pipe.

[0073] In actual use, the fluid in the second cooling tower 31 can enter the heat pump water heater 32 through the second circulating water outlet pipe, and after heat exchange in the heat pump water heater 32, the fluid can flow back to the second cooling tower 31 through the second circulating water inlet pipe.

[0074] Moreover, if Figure 2 As shown, a fourth water pump 35 is also provided on the second circulating water inlet pipe, and the fourth water pump 35 is electrically connected to the power transmission line 13. The power transmission line 13 can supply power to the fourth water pump 35, so that the fourth water pump 35 drives the fluid to circulate continuously between the second cooling tower 31 and the heat pump water heater 32.

[0075] In addition, if Figure 2 As shown, a valve EV3 is provided on one side of the second circulating water outlet pipe close to the water outlet of the second cooling tower 31, and a valve EV4 is provided on one side of the second circulating water inlet pipe close to the water inlet of the second cooling tower 31. By controlling the on-off of valves EV3 and EV4, the flow state of the fluid in the second circulating pipeline 33 can be controlled.

[0076] Further, in one embodiment, Figure 2 As shown, in order to ensure that the fluid can be effectively supplied to the external domestic water equipment, the second supply pipeline 34 includes a second supply water outlet pipe and a second supply water inlet pipe. The second water outlet end of the heat pump water heater 32 is connected to the water inlet end of the external domestic water equipment via the second supply water outlet pipe, and the second water inlet end of the heat pump water heater 32 is connected to the water outlet end of the external domestic water equipment via the second supply water inlet pipe.

[0077] In actual use, externally supplied fluid can enter the heat pump water heater 32 via the second supply water inlet pipe, and after heat exchange in the heat pump water heater 32, the fluid can be provided to external domestic water equipment via the second supply water outlet pipe.

[0078] Moreover, if Figure 2 As shown, a fifth water pump 36 is also provided on the second water supply outlet pipe. The fifth water pump 36 is electrically connected to the power transmission line 13. The power transmission line 13 can supply power to the fifth water pump 36, so that the fifth water pump 36 drives the fluid to continuously supply the external domestic water equipment.

[0079] Further, in one embodiment, Figure 2 As shown, in order to ensure that the fluid can circulate between the first circulation pipeline 23 and the waste heat exchanger 41, the heat source side pipeline 42 includes a heat source side water inlet pipe and a heat source side water outlet pipe. The first circulation water inlet pipe is connected to the first water inlet end of the waste heat exchanger 41 via the heat source side water inlet pipe, and the first circulation water outlet pipe is connected to the first water outlet end of the waste heat exchanger 41 via the heat source side water outlet pipe.

[0080] In actual use, after the fluid carrying heat in the heat pump 22 enters the first circulation water inlet pipe, these fluids can enter the waste heat exchanger 41 through the heat source side water inlet pipe. After transferring heat in the waste heat exchanger 41, these fluids can enter the first circulation water outlet pipe through the heat source side water outlet pipe, and then, can follow the fluid in the first circulation water outlet pipe into the heat pump 22.

[0081] In addition, if Figure 2 As shown, a valve EV5 is provided on the side of the heat source side water inlet pipe close to the first circulation water inlet pipe, and a valve EV6 is provided on the side of the heat source side water outlet pipe close to the first circulation water outlet pipe. By controlling the on-off of valves EV5 and EV6, the flow state of the fluid in the heat source side pipeline 42 can be controlled.

[0082] In addition, for the convenience of control, the connection between the heat source side water inlet pipe and the first circulation water inlet pipe can be located upstream of the valve EV1, and the connection between the heat source side water outlet pipe and the first circulation water outlet pipe can be located downstream of the valve EV2.

[0083] Further, in one embodiment, in order to ensure that the fluid can circulate between the second circulation pipeline 33 and the waste heat exchanger 41, as shown in FIG. Figure 2 As shown, the heat absorption side pipeline 43 includes a heat absorption side water inlet pipe and a heat absorption side water outlet pipe. The second circulation water inlet pipe is connected to the second water inlet end of the waste heat exchanger 41 via the heat absorption side water inlet pipe, and the second circulation water outlet pipe is connected to the second water outlet end of the waste heat exchanger 41 via the heat absorption side water outlet pipe.

[0084] In actual use, after the fluid after heat replacement in the heat pump water heater 32 enters the second circulation water inlet pipe, these fluids can enter the waste heat exchanger 41 through the heat absorption side water inlet pipe. After receiving heat in the waste heat exchanger 41, these fluids can enter the second circulation water outlet pipe through the heat absorption side water outlet pipe, and then, they can follow the fluid in the second circulation water outlet pipe to enter the heat pump water heater 32.

[0085] In addition, if Figure 2 As shown, a valve EV7 is provided on the side of the heat absorption side water inlet pipe close to the second circulation water inlet pipe, and a valve EV8 is provided on the side of the heat absorption side water outlet pipe close to the second circulation water outlet pipe. By controlling the on-off of valves EV7 and EV8, the flow state of the fluid in the heat absorption side pipeline 43 can be controlled.

[0086] In addition, for the convenience of control, the connection between the heat absorption side water inlet pipe and the second circulation water inlet pipe can be located upstream of valve EV4, and the connection between the heat absorption side water outlet pipe and the second circulation water outlet pipe can be located downstream of valve EV3.

[0087] As mentioned above, in this embodiment, a control method for the energy supply system based on solar power supply is also provided. Figure 3 As shown, the control method includes: S1: When it is necessary to supply heat to external functional equipment and provide hot water to external domestic water equipment without recovering waste heat, the heat pump and the heat pump water heater are powered, and the first circulation pipeline and the second circulation pipeline are in a flow state, and the heat source side pipeline and the heat absorption side pipeline are in a disconnected state; S2: When it is necessary to provide cooling to external functional equipment and hot water to external domestic water equipment and recover waste heat at the same time, the heat pump and the heat pump water heater are powered, and the second circulation pipeline, the heat source side pipeline and the heat absorption side pipeline are in a flow state, and the first circulation pipeline is in a disconnected state; S3: When it is necessary to provide hot water to external domestic water equipment without recovering waste heat, the heat pump water heater is powered, and the second circulation pipeline is in a flow state, so that the first circulation pipeline, the heat source side pipeline and the heat absorption side pipeline are in a disconnected state.

[0088] It can be understood that, in one embodiment, a total of eight valves can be provided in the energy supply system, and the eight valves can be adjusted according to the operating status of the system to ensure the normal operation of the system.

[0089] This control method can select different control modes according to different seasons.

[0090] For example, for step S1: in winter, when the system needs to provide heat to external functional equipment and hot water to external domestic water equipment, and does not need to recover waste heat, the transmission line 13 in the power supply system supplies power to the heat pump 22 and the heat pump water heater 32, and the heat pump 22 and the heat pump water heater 32 both provide heat, and the valves EV1, EV2, EV3, and EV4 are in the open state, and the valves EV5, EV6, EV7, and EV8 are in the closed state.

[0091] For example, for step S2: in summer, when the system needs to provide cooling to external functional equipment and hot water to external domestic water equipment, and at the same time needs to recover waste heat, the transmission line 13 in the power supply system supplies power to the heat pump 22 and the heat pump water heater 32, the heat pump 22 needs cooling, and the heat pump water heater 32 needs heating, and the valves EV3, EV4, EV5, EV6, EV7, and EV8 are in the open state, and the valves EV1 and EV2 are in the closed state.

[0092] For example, for step S3: in the transition season, when the system only needs to provide hot water to external domestic water equipment and does not need to recover waste heat, the heat pump 22 does not need to run, and the transmission line 13 in the power supply system supplies power to the heat pump water heater 32, the heat pump water heater 32 needs to supply heat, and the valves EV3 and EV4 are in the open state, and the valves EV1, EV2, EV5, EV6, EV7, and EV8 are in the closed state.

[0093] In one embodiment, when the heat pump 22 and the heat pump water heater 32 are matched, the heat pump 22 unit can achieve a comprehensive COP of 7.3, and the annual waste heat utilization rate can reach 84.72% when combined with the domestic water tank. The overall renewable energy utilization rate is 86.73%-100%. Among them, if there is enough space for photovoltaic power generation, 100% renewable energy heating and cooling can be achieved.

[0094] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0095] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An energy supply system based on solar power supply, characterized in that: include: An electric power supply system, the electric power supply system comprising: a solar photovoltaic power generation device, an energy storage device and a power transmission line, the solar photovoltaic power generation device and the energy storage device being electrically connected to the power transmission line; A cold and hot supply system, the cold and hot supply system comprising: a first cooling tower, a heat pump, a first circulation pipeline and a first supply pipeline, the first cooling tower and the heat pump are electrically connected to the power transmission line, the heat pump is connected to the first cooling tower via the first circulation pipeline, and the heat pump is connected to an external functional device via the first supply pipeline; A hot water supply system, the hot water supply system comprising: a second cooling tower, a heat pump water heater, a second circulation pipeline and a second supply pipeline, the second cooling tower and the heat pump water heater are electrically connected to the power transmission line, the heat pump water heater is connected to the second cooling tower via the second circulation pipeline, and the heat pump water heater is connected to an external domestic water device via the second supply pipeline; A heat exchange system, the heat exchange system comprising: a waste heat exchanger, a heat source side pipeline and a heat absorption side pipeline, the waste heat exchanger is connected to the first circulation pipeline via the heat source side pipeline, and the waste heat exchanger is connected to the second circulation pipeline via the heat absorption side pipeline.

2. The energy supply system based on solar power supply according to claim 1 is characterized in that: The first circulation pipeline includes a first circulation water outlet pipe and a first circulation water inlet pipe. The water outlet end of the first cooling tower is connected to the first water inlet end of the heat pump via the first circulation water outlet pipe, and the water inlet end of the first cooling tower is connected to the first water outlet end of the heat pump via the first circulation water inlet pipe.

3. The energy supply system based on solar power supply according to claim 1 is characterized in that: The first supply pipeline includes a first supply water outlet pipe and a first supply water inlet pipe. The second water outlet end of the heat pump is connected to the water inlet end of an external functional device via the first supply water outlet pipe, and the second water inlet end of the heat pump is connected to the water outlet end of an external functional device via the first supply water inlet pipe.

4. The energy supply system based on solar power supply according to claim 3 is characterized in that: It also includes a water divider and a water collector, wherein the water divider is arranged on the first supply water outlet pipe, and the water collector is arranged on the first supply water inlet end.

5. The energy supply system based on solar power supply according to claim 3 is characterized in that: It also includes a water treatment device, which is connected to the first water supply inlet pipe.

6. The energy supply system based on solar power supply according to claim 1 is characterized in that: The second circulation pipeline includes a second circulation water outlet pipe and a second circulation water inlet pipe. The water outlet end of the second cooling tower is connected to the first water inlet end of the heat pump water heater via the second circulation water outlet pipe, and the water inlet end of the second cooling tower is connected to the first water outlet end of the heat pump water heater via the second circulation water inlet pipe.

7. The energy supply system based on solar power supply according to claim 1 is characterized in that: The second supply pipeline includes a second supply water outlet pipe and a second supply water inlet pipe. The second water outlet end of the heat pump water heater is connected to the water inlet end of an external domestic water equipment via the second supply water outlet pipe. The second water inlet end of the heat pump water heater is connected to the water outlet end of an external domestic water equipment via the second supply water inlet pipe.

8. The energy supply system based on solar power supply according to claim 2 is characterized in that: The heat source side pipeline includes a heat source side water inlet pipe and a heat source side water outlet pipe. The first circulating water inlet pipe is connected to the first water inlet end of the waste heat exchanger via the heat source side water inlet pipe, and the first circulating water outlet pipe is connected to the first water outlet end of the waste heat exchanger via the heat source side water outlet pipe.

9. The energy supply system based on solar power supply according to claim 6, characterized in that: The heat absorption side pipeline includes a heat absorption side water inlet pipe and a heat absorption side water outlet pipe. The second circulation water inlet pipe is connected to the second water inlet end of the waste heat exchanger via the heat absorption side water inlet pipe, and the second circulation water outlet pipe is connected to the second water outlet end of the waste heat exchanger via the heat absorption side water outlet pipe.

10. A control method for an energy supply system based on solar power supply as claimed in any one of claims 1 to 9, characterized in that: The control method comprises: When it is necessary to supply heat to external functional equipment and provide hot water to external domestic water equipment without recovering waste heat, the heat pump and the heat pump water heater are powered, and the first circulation pipeline and the second circulation pipeline are in a flow state, and the heat source side pipeline and the heat absorption side pipeline are in a disconnected state; When it is necessary to provide cooling to external functional equipment and hot water to external domestic water equipment and recover waste heat at the same time, the heat pump and the heat pump water heater are powered, and the second circulation pipeline, the heat source side pipeline and the heat absorption side pipeline are in a flow state, and the first circulation pipeline is in a disconnected state; When it is necessary to provide hot water to external domestic water equipment without recovering waste heat, the heat pump water heater is powered and the second circulation pipeline is in a flow state, so that the first circulation pipeline, the heat source side pipeline and the heat absorption side pipeline are in a disconnected state.

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