阅读说明：本技术 一种太阳能与地热能耦合的聚光分频光伏光热地热一体化系统 (Concentrating frequency division photovoltaic photo-thermal and geothermal integrated system with solar energy and geothermal energy coupled ) 是由 胡玥 张骆宾 吕辉 吴晓鹏 张瀚霆 姚育成 于 2021-08-09 设计创作，主要内容包括：本发明提供了一种太阳能与地热能耦合的聚光分频光伏光热地热一体化系统,涉及能源技术领域,特别是一种光伏光热解耦的太阳能与地热能综合利用系统。包括地热采集管、一号三通阀、止回阀、四通阀、一号水泵、冷却背板、电池、抛物面槽式聚光器、分频片、集热器、一号储水罐、一号温度传感器、二号温度传感器、电动阀、锅炉、二号三通阀、换热器、补水箱、供暖回水管、二号储水罐、二号水泵、一号阀门、二号阀门、供暖供水管、生活用水供水管。该系统通过聚光分频光伏光热阵列对地热资源提质进行用户供热并产出电能,同时还实现了太阳光谱分离梯级利用,极大地提高太阳能全光谱综合利用率。(The invention provides a solar energy and geothermal energy coupled concentrating and frequency dividing photovoltaic photo-thermal and geothermal energy integrated system, relates to the technical field of energy, and particularly relates to a photovoltaic photo-thermal decoupling solar energy and geothermal energy comprehensive utilization system. The system comprises a geothermal collecting pipe, a first three-way valve, a check valve, a four-way valve, a first water pump, a cooling back plate, a battery, a parabolic trough condenser, a frequency division sheet, a heat collector, a first water storage tank, a first temperature sensor, a second temperature sensor, an electric valve, a boiler, a second three-way valve, a heat exchanger, a water replenishing tank, a heating water return pipe, a second water storage tank, a second water pump, a first valve, a second valve, a heating water supply pipe and a domestic water supply pipe. According to the system, the concentration and frequency division photovoltaic photo-thermal array is used for improving the quality of geothermal resources, so that users supply heat and generate electric energy, the solar spectrum separation and cascade utilization are realized, and the full-spectrum comprehensive utilization rate of solar energy is greatly improved.)

1. A solar energy and geothermal energy coupled concentrating frequency division photovoltaic photo-thermal and geothermal integrated system comprises: the system comprises a geothermal collecting pipe (1), a first three-way valve (2), a check valve (3), a four-way valve (4), a first water pump (5), a cooling back plate (6), a battery (7), a parabolic trough condenser (8), a frequency dividing sheet (9), a heat collector (10), a first water storage tank (11), a first temperature sensor (12), a second temperature sensor (13), an electric valve (14), a boiler (15), a second three-way valve (16), a heat exchanger (17), a water supplementing tank (18), a heating water return pipe (19), a second water storage tank (20), a second water pump (21), a first valve (22), a second valve (23), a heating water supply pipe (24) and a domestic water supply pipe (25), wherein the outlet of the geothermal collecting pipe (1) in the integrated system is connected with the first three-way valve (2), and the other two ends of the first three-way valve (2) are respectively connected with the check valve (3) and the four-way valve (4), the water-cooling solar water heater is characterized in that the check valve (3) is connected with a first water pump (5), the first water pump (5) is connected with a cooling back plate (6) through a pipeline, a battery (7) is arranged at the upper part of the cooling back plate (6), the battery (7) is arranged at the bottom of each parabolic trough type condenser (8), a frequency division sheet (9) is arranged on each parabolic trough type condenser (8), a heat collector (10) is arranged on the frequency division sheet (9), the cooling back plate (6) and the heat collector (10) are communicated and connected to a first water storage tank (11) through pipelines, the lower part of the first water storage tank (11) is respectively connected with a first temperature sensor (12) and a second temperature sensor (13), the other end of the first temperature sensor (12) is connected with an electric valve (14), the other end of the electric valve (14) is connected with the first water pump (5) and the check valve (3) through pipelines, and the second temperature sensor (13) is connected with a four-way valve (4), boiler (15) and No. two three-way valve (16) are connected respectively to the other both ends of cross valve (4), and boiler (15) and heat exchanger (17) are connected respectively to No. two three-way valve (16) other both ends, and geothermol power collection pipe (1) is connected to heat exchanger (17) delivery port, moisturizing case (18) and heating wet return (19) are connected to heat exchanger (17) one side water inlet, No. two water storage tank (20) are connected to heat exchanger (17) opposite side delivery port, and No. two water pump (21) are connected in No. two water storage tank (20), and No. one valve (22) and No. two valve (23) are connected in No. two water pump (21), heating delivery pipe (24) are connected in valve (22), domestic water delivery pipe (25) is connected in No. two valve (23).

2. The solar energy and geothermal energy coupled concentrating frequency division photovoltaic photothermal geothermal integrated system according to claim 1, wherein: a water storage tank (11) is connected with a temperature sensor (12), an electrically operated valve (14) is connected with the temperature sensor (12), the electrically operated valve (14) is respectively connected with a check valve (3) and a water pump (5) through pipelines, the check valve (3) is connected with a water outlet of a geothermal collecting pipe (1), and the water pump (5) is connected with a cooling back plate (6).

The technical field is as follows:

the invention relates to the technical field of energy, in particular to a photovoltaic photo-thermal decoupling solar energy and geothermal energy comprehensive utilization system.

Background art:

in recent years, with the increase of population and the development of economy, people have more and more demand for energy, and the environmental problems caused by the demand are more and more serious. Geothermal energy is large in reserves in China and wide in distribution range, solar energy has the characteristics of cleanness, high efficiency and reproducibility, and in recent years, geothermal energy and solar energy are more and more emphasized by people. The geothermal resources in China mainly comprise low-temperature geothermal resources and can be used for cooling in summer and heating in winter. Solar energy utilization technologies generally include solar photothermal technologies and photovoltaic technologies, but at present solar cells are not ideal in efficiency, and commercially available solar cells are not more than 20% efficient. The rest radiation which is not converted into electric energy is converted into heat energy, which can cause the temperature of the battery to rise, reduce the efficiency of the battery and influence the service life of the battery, which is more obvious in a concentrating photovoltaic system, and the electric efficiency is reduced by 0.05 percent when the temperature of the battery rises by 1 ℃.

In order to control the temperature of the battery and realize the full-spectrum comprehensive utilization of solar energy, a concentrating and frequency-dividing photovoltaic power generation system is provided, sunlight is divided into different sections according to different wavelengths and is distributed to different photovoltaic devices for receiving, so that the comprehensive utilization rate of the solar energy is improved, theoretically, the smaller the frequency-dividing section is, the higher the photovoltaic conversion efficiency is, but the optical loss is increased by too many light-dividing units, so that the conversion efficiency is not obviously improved. Besides the frequency division technology, the concentrating photovoltaic photo-thermal integrated system combines a photovoltaic component and a heat collector, and can also improve the full-spectrum comprehensive utilization rate of solar energy. However, the working medium of the concentrating photovoltaic photo-thermal integrated system usually needs to supply heat, which means that the working medium needs to be heated to a higher temperature, so that the efficiency of the battery is reduced, and meanwhile, the temperature of the usable working medium is not high due to the restriction of the operating temperature of the battery.

The invention content is as follows:

the invention aims to provide a solar energy and geothermal energy coupled concentrating frequency division photovoltaic photothermal-geothermal integrated system.

The design idea of the invention is as follows: in order to improve the energy utilization rate, a solar full spectrum cascade utilization and geothermal upgrading technology is adopted, a light-gathering frequency-division photovoltaic power generation system is used for generating electric energy to be connected with a municipal power grid, and the temperature of geothermal resources is improved by using heat energy generated by light-electricity conversion waste heat and light-heat conversion to supply heat users. The direct solar radiation spectrum is converged on the parabolic groove type condenser array and then irradiates the frequency division sheet, the frequency division sheet distributes partial spectrum responded by the solar cell to the surface of the solar cell for light-electricity conversion, and the rest spectrum is transmitted to the heat collector for light-heat conversion. The heat generated by the photo-electric conversion and the photo-thermal conversion is used for secondary heating of the primary heating circulating water by the ground heat. For preventing that hot water temperature is not enough, after the circulating water of reheat mixes promotion reheat water inlet temperature with the hot water of primary heating once more, reheat in spotlight frequency division photovoltaic power generation system, for preventing that solar energy is not enough to lead to unable reheat or reheat temperature is not enough, set up the boiler and carry out the cubic heating when hot water temperature is not enough, when night or solar radiation intensity are extremely low, directly with boiler heating geothermol power collection pipe export water, finally produce a large amount of medium temperature hot water that the temperature is enough and be used for user's heating and domestic water.

Based on the characteristics, the concentrating and frequency-dividing photovoltaic photo-thermal and geothermal integrated system with solar energy and geothermal energy coupled is provided. The system utilizes a frequency division technology to carry out full spectrum cascade utilization of solar energy, a part capable of carrying out high-efficiency photoelectric conversion is absorbed by a solar cell and converted into electric energy, and the rest spectrum bands are absorbed by a heat collector and converted into heat energy. The heat load of the photovoltaic cell is reduced, and higher heat collection temperature can be obtained. Meanwhile, the circulating water is heated once by the terrestrial heat, and the heated circulating water flows through the solar cell back plate and the heat collector in sequence to take away the high-temperature heat of the cell waste heat and the heat collector, so that a large amount of medium-temperature hot water is generated and supplied to users. When the solar radiation intensity is not enough, the boiler is utilized to heat the circulating water for three times, and when the solar radiation intensity is extremely low at night or in the solar irradiance, the boiler is directly utilized to heat the circulating water for the second time, so that the water temperature of a user is ensured, and the energy consumption is reduced as much as possible. The system can reduce the temperature of the solar cell panel, improve the photoelectric conversion efficiency, produce a large amount of medium-temperature heat energy and improve the comprehensive utilization rate of energy.

In order to achieve the purpose, the technical scheme of the invention is as follows:

the utility model provides a spotlight frequency division photovoltaic light and heat geothermol power integration system of solar energy and geothermal energy coupling, includes geothermol power collection pipe, a three-way valve, the check valve, the cross valve, a water pump, the cooling backplate, the battery, parabolic slot type spotlight ware, the frequency division piece, the heat collector, a water storage tank, a temperature sensor, No. two temperature sensor, motorised valve, the boiler, No. two three-way valves, the heat exchanger, the moisturizing case, the heating wet return, No. two water storage tanks, No. two water pumps, a valve, No. two valves, the heating delivery pipe, domestic water delivery pipe. The outlet of a geothermal collecting pipe in the system is connected with a first three-way valve, the other two ends of the first three-way valve are respectively connected with a check valve and a four-way valve, the check valve is connected with a first water pump, the first water pump is connected with a cooling back plate, the upper part of the cooling back plate is provided with a battery, the battery is arranged at the bottom of each parabolic trough type condenser, a frequency dividing sheet is arranged on each parabolic trough type condenser, a heat collector is arranged on the upper surface of the frequency dividing sheet, the cooling back plate and the heat collector are communicated and connected with a first water storage tank by pipelines, the lower part of the first water storage tank is respectively connected with a first temperature sensor and a second temperature sensor, the other end of the first temperature sensor is connected with an electric valve, the other end of the electric valve is connected with the first water pump and the check valve by pipelines, the second temperature sensor is connected with the four-way valve, the other two ends of the four-way valve are respectively connected with a boiler and a second three-way valve, the other two ends of the three-way valve are respectively connected with a boiler and a heat exchanger, the water outlet of the heat exchanger is connected with a geothermal collecting pipe. The water supplementing tank and the heating return pipe are connected to a water inlet in the other side of the heat exchanger, the water outlet in the other side of the heat exchanger is connected with the second water storage tank, the second water storage tank is connected with the second water pump, the second water pump is connected with the first valve and the second valve, the first valve is connected with the heating water supply pipe, and the second valve is connected with the domestic water supply pipe.

According to the scheme, the geothermal collecting pipe controls the deep burying position, and can realize stable hot water supply at 25-40 ℃.

According to the scheme, the reflection increasing of the corresponding battery high-efficiency photovoltaic conversion interval and the reflection increasing of other spectral intervals can be realized through the design of film thickness, stacking layers, materials and the like of the frequency division sheet in the parabolic groove type concentrating frequency division photovoltaic unit.

According to the scheme, the solar heat supply unit utilizes the battery cooling back plate to provide a low-temperature heat source at about 60 ℃, and then the solar heat collector provides high-temperature heat energy at 150 ℃, so that a large amount of medium-temperature hot water at 80 ℃ is finally formed and enters the heat exchanger for heat supply.

According to the scheme, the solar heat supply unit is provided with the circulating heating system, and the water temperature at the inlet of the solar heat supply unit is increased and the temperature of the product is increased by mixing the medium-temperature product with the low-temperature hot water of the geothermal collecting pipe. Meanwhile, when the solar energy is insufficient, the boiler can be used for reheating the product, the heat supply temperature is guaranteed, the characteristic that the solar radiation intensity is unstable is solved, and when the solar radiation intensity is extremely low at night or solar radiation intensity, the boiler is directly used for heating the temperature of the geothermal collecting pipe, so that the stable heat supply operation in 24 hours all day is realized.

Compared with the prior art, the invention has the following positive effects:

1. the system utilizes the geothermal unit to heat the product water for one time, has higher stability, and is economic and environment-friendly.

2. The frequency division sheet adopted by the parabolic trough type concentrating frequency division photovoltaic unit in the system realizes the reflection increase of the response spectral interval of the selected solar cell and the reflection increase of other spectral intervals by plating a plurality of film systems on glass and adjusting the number of layers of the film systems, the thickness of each layer of film and the refractive index.

3. Most of the spectrum reflected to the surface of the solar cell by the system belongs to visible light, and can be directly absorbed by the solar cell for photoelectric conversion, so that the heat dissipation effect of the solar cell is reduced, and the long-time efficient stable operation of the cell is facilitated.

4. The system performs spectrum separation through a frequency division technology, and performs secondary heating of heat supply backwater through the battery backboard and the heat collector in sequence, so that the cascade utilization of the solar full spectrum is realized, and the comprehensive utilization rate of the solar full spectrum is greatly improved.

5. The solar heat supply unit of the system is provided with a circulating heating system, and when the temperature of a product is insufficient, the temperature of the inlet water is increased by mixing the product with the inlet water of the solar heat supply unit, and finally, the temperature of the product is increased.

6. When solar energy is insufficient, the system heats the product again by using a boiler, ensures the heat supply temperature, solves the problem of unstable solar radiation intensity, and improves the operation stability and safety of the system.

7. The system is controlled by a three-way valve at night or when the solar irradiation intensity is extremely low, hot water of the geothermal collecting pipe is directly heated by a boiler, stable hot water supply is provided for users, and energy loss is reduced.

Description of the drawings:

FIG. 1 is a structural schematic diagram of a solar energy and geothermal energy coupled concentrating and frequency dividing photovoltaic photo-thermal-geothermal integrated system.

FIG. 2 is a schematic structural diagram of a single concentrating and frequency-dividing photovoltaic photo-thermal unit according to the present invention.

Fig. 3 is a schematic diagram of the transfer of direct solar radiation of a single concentrating and frequency dividing photovoltaic photo-thermal unit according to the present invention.

In the figure: 1. a geothermal collection pipe; 2. a first three-way valve; 3. a check valve; 4. a four-way valve; 5. a water pump I; 6. cooling the back plate; 7. a battery; 8. a parabolic trough concentrator; 9. a frequency divider; 10. a heat collector; 11. a first water storage tank; 12. a first temperature sensor; 13. a second temperature sensor; 14. an electrically operated valve; 15. a boiler; 16. a second three-way valve; 17. a heat exchanger; 18. a water replenishing tank; 19. a heating water return pipe; 20. a second water storage tank; 21. a second water pump; 22. a first valve; 23. a second valve; 24. a heating water supply pipe; 25. domestic water supply pipe.

The specific implementation mode is as follows:

the technical solution of the present invention will be further clearly and completely described below with reference to the accompanying drawings and embodiments, wherein the described embodiments are only a part of the embodiments of the present invention, and all other embodiments obtained by those skilled in the art without any creative effort belong to the protection scope of the present invention.

Example 1

Referring to fig. 1-3, the system is a solar energy and geothermal energy coupled concentrating and frequency dividing photovoltaic photo-thermal-geothermal integrated system, which mainly comprises a geothermal unit, a parabolic trough concentrating and frequency dividing photovoltaic photo-thermal unit, a temperature control unit, and a heat supply unit. The heating backwater is heated by the geothermal collecting pipe 1 and then reaches the check valve 4 through the three-way valve 2, kinetic energy is given at the water pump 5 and then flows through the cooling back plate 6, the cooling back plate 6 absorbs the light-electricity conversion waste heat of the battery 7 and is used for heating the circulating water, the battery 7 converts a solar spectrum interval which is selectively reflected by the frequency division sheet 9 and responds to the battery after condensing the light of the parabolic groove type condenser 8 into electric energy by utilizing the photovoltaic effect and then is connected into a municipal power grid, a spectrum interval which is not reflected by the frequency division sheet 9 is transmitted to the heat collector 10 for light-heat conversion, the heat collector 10 heats the circulating water from the cooling back plate 6 and enters the water storage tank 11, the water storage tank 11 is connected with the temperature sensor 12 and the temperature sensor 13, and the temperature sensor 12 is connected with the electric valve 14.

When the sunlight is sufficient in the daytime, the temperature sensor 12 detects that the temperature is sufficient, and the electric valve 14 is closed. When the sunlight is insufficient in daytime, the temperature sensor 12 detects that the temperature is insufficient, the opening of the electric valve 14 is increased, the medium-temperature hot water in the water storage tank 11 is mixed with the low-temperature hot water flowing out of the outlet of the geothermal collecting pipe 1, and the temperature of the circulating water at the inlet of the cooling back plate 6 is increased, so that the temperature of the water storage tank 11 is increased. When sunlight cannot sufficiently heat circulating water temperature, in order to enable the water supply temperature to reach the required temperature, a boiler 15 is arranged for supplementary heating, a second temperature sensor 13 and a four-way valve 4 are arranged between a first water storage tank 11 and the boiler 15, when the second temperature sensor 13 detects that the temperature is sufficient, the four-way valve 4 controls hot water to directly flow through a second three-way valve 16 to reach a heat exchanger 17, and when the second temperature sensor 13 detects that the temperature is insufficient, the four-way valve 4 controls the hot water to heat in the boiler 15, heat the hot water is heated, and then the hot water flows into the second three-way valve 16 and finally enters the heat exchanger 17. The heat exchanger 17 is connected to the geothermal collection pipe 1 to circulate.

When the night or almost no sunlight is incident, the outlet water of the geothermal collecting pipe 1 directly reaches the boiler 15 through the first three-way valve 2 and the four-way valve 4, is heated and then reaches the heat exchanger 17 through the second three-way valve 16, and finally returns to the geothermal collecting pipe 1.

A water supplementing tank 18 and a heating water return pipe 19 are connected to a water inlet in the other side of the heat exchanger 17, heating water return reaches a second water storage tank 20 after being heated in the heat exchanger 17, the second water storage tank 20 is connected with a second water pump 21, the second water pump 21 sends hot water to a first valve 22 and a second valve 23, the first valve 22 is connected with a heating water supply pipe 24 for building heating, and the second valve 23 is connected with a domestic water supply pipe 25 for supplying stable domestic hot water.

Example 2

Referring to fig. 1-3, in the concentrating and frequency-dividing photovoltaic photo-thermal-geothermal integrated system with solar energy and geothermal energy coupled, the operation condition is the same as that in embodiment 1, wherein sunlight is subjected to interval processing by the frequency dividing sheet 10 according to different spectral wavelengths, so that the spectral interval capable of performing high-efficiency photo-electric conversion is increased, the sunlight is reflected to the surface of the battery 7 and absorbed by the battery to generate electric energy, meanwhile, the heat generation of the battery 7 is reduced, the photo-electric conversion efficiency is improved, the stability of the battery 7 is maintained, the anti-reflection of the photo-electric conversion or the spectral band with lower photo-electric conversion efficiency cannot be performed, the sunlight is transmitted to the heat collector 8 to perform the photo-thermal conversion, the heat collection temperature is not limited by the operation temperature of the battery 7, and can reach 150 ℃, and the comprehensive utilization rate of solar energy is improved.

Example 3

Referring to fig. 1-3, in the solar energy and geothermal energy coupled light-concentrating and frequency-dividing photovoltaic photothermal and geothermal integrated system, the operation conditions are the same as those in embodiment 1, when the solar radiation intensity is sufficient, the electric valve 14 is closed, and the hot water in the first water storage tank 11 directly flows through the second temperature sensor 13, the four-way valve 4 and the second three-way valve 16 to reach the heat exchanger 17 to supply heat to the user. When the solar radiation intensity is insufficient, the electric valve 14 is opened greatly, the medium-temperature hot water in the first water storage tank 11 is controlled to be mixed with the outlet water of the geothermal collecting pipe, the mixed water passes through the cooling back plate 6 and the heat collector 10 again and reaches 11, and when the temperature sensor 13 detects that the temperature is insufficient, the four-way valve controls the hot water in the first heat storage tank 11 to flow through the boiler 15 to be heated again and then reaches the heat exchanger 17 through the three-way valve 16. At night or cloudy day, a three-way valve 2 and a four-way valve 4 control geothermal collecting pipe hot water to directly flow into boiler 15 and heat to this guarantees the heating temperature, reduces the system energy consumption, improves system stability.

The above-described embodiments are only preferred embodiments of the present invention, and a great number of embodiments may be derived, and it will be apparent to those skilled in the art that a great number of variations and modifications may be made without departing from the inventive concept and without inventive step, and such variations and modifications also fall within the scope of the present invention.