CN113074404B - An off-grid optical storage integrated clean cogeneration system and its operation method - Google Patents

Abstract

The invention discloses an off-grid optical storage integrated clean heat and power combined supply system and an operation method thereof. The system includes a photovoltaic power generation system, a solar thermal panel, a hot water storage tank, a heat pump unit, a deep buried pipe system, an internal combustion engine generator set, a storage Energy and energy release units, heat exchangers and throttle valves, etc., all components are connected by pipes, and heat pump units are connected with photovoltaic power generation systems, solar thermal panels, hot water storage tanks, deep buried pipe systems, internal combustion engine units and energy release units. The other end is connected to the user side; the present invention couples the solar panel and the heat pump unit, and is equipped with a deep buried pipe system, an internal combustion engine generator unit, and an energy storage and energy release unit, so that the solar energy and geothermal energy are rationally utilized, so that the long-term stability of It provides heat for the user side. When heating is not needed, solar panels can also be used for photovoltaic power generation. The supporting energy storage unit can solve the intermittent problem of photovoltaic power generation.

Description

An off-grid optical storage integrated clean cogeneration system and its operation method

technical field

The invention relates to the technical field of renewable energy, energy storage and off-grid power supply and heating, in particular to an off-grid optical-storage-integrated clean cogeneration system and an operation method thereof.

Background technique

The heating capacity of the air source heat pump system decreases rapidly with the decrease of the ambient temperature, especially when the temperature is low, the low start-up temperature will cause the system to report an error or even fail to start. The current solar heat pump system mostly uses solar photovoltaic panels to power the heat pump, which does not help the performance of the heat pump. At the same time, these solar heat pump systems have high cost, unstable operation, and low outdoor temperature in winter, making operation and maintenance difficult.

In plateau alpine areas and remote mountainous areas, these areas require less energy supply, are far away from the grid, and at the same time, the ecological environment is fragile and extreme weather exists. How to solve the energy demand in these areas without destroying the local ecological environment is an urgent problem to be solved.

Solar energy has the characteristics of universality and uncertainty. Using solar energy to supply heat can effectively reduce the dependence on fossil fuels. However, it is difficult to get rid of the dependence on the power grid. At the same time, the temperature in the western region is extremely low and there is no sunlight at night in winter, and it is difficult to use solar energy to provide heat effectively. How to solve the uncertainty of solar energy has become a key issue.

SUMMARY OF THE INVENTION

In view of the deficiencies of the prior art, the present invention provides a clean cogeneration system integrating off-grid optical storage, which utilizes a solar power supply heating system, is coupled with a deep-buried pipe air source heat pump unit, and adds a pumping compressed air energy storage system and an internal combustion engine. The generator set provides low-cost, zero-emission off-grid district heating and power supply for plateau alpine and remote areas, reducing energy supply costs and solving energy supply problems in the above-mentioned areas.

In order to achieve the above purpose, the technical solution of the present invention is as follows: a clean cogeneration system integrating off-grid optical storage, including a photovoltaic power generation system, an energy storage unit, an energy release unit, a hot water storage tank, a cold water tank, and a deep buried pipe systems, heat pump units, internal combustion engine generator units, solar thermal panels and solar artificial greenhouses,

The energy storage unit, the energy release unit, the hot water storage tank, the cold water tank, the heat pump unit, and the internal combustion engine generator unit are installed in the solar artificial greenhouse, the deep buried pipe system is embedded in the dry hot rock formation below the ground, and the solar thermal panel is installed in the solar artificial greenhouse. At the top of the greenhouse, the medium outlet of the solar thermal plate is connected to the heat medium inlet of the hot water storage tank, the outlet of the hot water storage tank is respectively connected to the energy release unit, the deep buried pipe system and the heat pump unit, and the water inlet of the cold water tank is respectively connected to the energy release unit, The water outlet of the deep buried pipe system and the heat pump unit, the water outlet of the cold water tank is connected to the medium inlet of the solar thermal plate, and the heat pump unit is connected to the inlet and outlet of the deep buried pipe system;

The photovoltaic power generation system, the energy storage unit, the energy release unit, and the heat pump unit are connected in sequence through cables, and the electric energy output end of the internal combustion engine generator unit is connected with the electric energy input end of the heat pump unit;

The energy storage unit adopts the pumped compressed air energy storage unit, the heat pump unit adopts the air source heat pump, and the internal combustion engine generator unit and the heat pump unit are connected to the heating users through the heating water supply pipeline and the heating return water pipeline.

A throttle valve and a water pump are sequentially arranged on the pipeline from the deep buried pipe system to the cold water tank, a water pump and a throttle valve are arranged on the pipeline from the heat pump unit to the cold water tank, and a water pump and a water pump are sequentially arranged on the pipeline from the hot water storage tank to the heat pump unit. Throttle valve, a throttle valve and a water pump are set in sequence on the pipeline from the water outlet of the cold water tank to the medium inlet of the solar thermal plate.

The heat pump unit includes an air-cooled evaporator, a first water-cooled evaporator, a second water-cooled evaporator, a condenser and a compressor. Both the first water-cooled evaporator and the second water-cooled evaporator are connected in parallel with the air-cooled evaporator through pipes. The outlet of the condenser is connected to the inlet of the compressor, the outlet of the compressor is connected to the inlet of the working medium of the condenser, and the outlet of the working medium of the condenser is connected to the inlet of the air-cooled evaporator, the first water-cooled evaporator and the second water-cooled evaporator, and the cold side of the condenser is connected. The heating user is connected through the heating water supply pipeline and the heating return water pipeline, and the second water-cooled evaporator is connected to the inlet and outlet of the deep buried pipe system.

The outer wall of the solar artificial greenhouse includes an outer wall of electrochromic glass and an inner wall of tempered glass, and a vacuum insulation layer is arranged between the outer wall of electrochromic glass and the inner wall of tempered glass.

The outer wall of the solar thermal plate is covered with electrochromic glass, and the solar thermal plate is provided with a solar collector tube. The inside of the solar collector tube is filled with a heat collecting medium. A vacuum space, the heat collecting section of the heat collecting pipe is arranged in the vacuum space, and the two ends of the heat collecting pipe are respectively connected to the cold water tank and the hot water storage tank.

The inner wall of the solar heat collecting tube is provided with spoilers at intervals along the axial direction.

The deep buried pipe system includes an inner pipe and an outer pipe, a vacuum insulation layer is arranged between the inner pipe and the outer pipe, and fins are arranged on the outer wall of the outer pipe.

The heating and power supply method of the clean cogeneration system with integrated off-grid optical storage according to the present invention,

When in the non-heating period, the solar thermal panel absorbs solar energy, supplies heat to the deep-buried pipe system through the hot water storage tank, cold water tank and heat pump unit, stores the heat in the dry hot rock, adopts the photovoltaic power generation system and the energy storage unit And the energy release unit provides electric energy to the user side;

When it is in the heating period and the light is sufficient, the solar thermal panel absorbs solar energy and supplies heat to the user side and the deep-buried pipe system through the hot water storage tank, cold water tank and heat pump unit to meet the heat demand of the user side and store excess heat in dry In the hot rock, the photovoltaic power generation system is used to provide electricity to the user side and the energy storage unit to meet the electricity demand of the user side and store the excess electricity in the energy storage unit;

When it is in the heating period and the sunlight is insufficient, the solar thermal panel absorbs solar energy and supplies heat to the user side through the hot water storage tank, cold water tank, deep buried pipe system and heat pump unit. Provide electricity to the user side, and use the internal combustion engine generator set as a supplement to continuously provide heat and electricity to the user side when the thermal storage of the solar thermal and deep buried pipe system is insufficient.

Compared with the prior art, the present invention at least has the following beneficial effects:

The clean cogeneration system with integrated off-grid optical storage proposed by the present invention, the solar artificial greenhouse combines solar photovoltaic photothermal panels and deep-buried pipe air source heat pumps, and an internal combustion engine generator set is added, so that the operation mode can be adjusted according to actual needs. The heat transfer of the heat transfer medium by solar energy and geothermal energy can effectively improve the performance of the air source heat pump and thus improve the heating effect. When it is insufficient, it can output heat to the outside, which can keep the system unit running in a low temperature environment, and can be applied to the environment of plateau and alpine regions. network operation.

Further, a throttle valve and a water pump are sequentially arranged on the pipeline from the deep buried pipe system to the cold water tank, a water pump and a throttle valve are sequentially arranged on the pipeline from the heat pump unit to the cold water tank, and the pipeline from the hot water storage tank to the heat pump unit is sequentially arranged. Set the water pump and throttle valve, and set the throttle valve and the water pump in turn on the pipeline from the water outlet of the cold water tank to the medium inlet of the solar thermal plate, which can strictly control the flow of the heat exchange medium in the system, and then adjust the operating state and efficiency.

Further, the outer wall of the solar artificial greenhouse includes an outer wall of electrochromic glass and an inner wall of tempered glass, and a vacuum insulation layer is arranged between the outer wall of the electrochromic glass and the inner wall of the tempered glass, which enhances the absorption of light and heat and helps to reduce the loss of indoor heat.

Further, a vacuum insulation layer is arranged between the electrochromic glass and the solar collector tube to reduce heat loss and utilize light heat to a greater extent.

Further, spoilers are arranged at intervals on the inner wall of the solar heat collecting tube to increase the fluid disturbance in the solar heat collecting tube and enhance the heat exchange between the heat absorbing medium and the solar heat collecting tube.

Further, the deep buried pipe system includes an inner pipe and an outer pipe, a vacuum insulation layer is arranged between the inner pipe and the outer pipe, which helps to keep warm, and the outer wall of the outer pipe is provided with fins to improve the heat absorption efficiency of the rock formation.

Description of drawings

FIG. 1 is a schematic structural diagram of an implementable clean cogeneration system with integrated off-grid optical storage according to the present invention.

FIG. 2 is a schematic structural diagram of an implementable heat pump unit of the present invention.

FIG. 3 is a schematic cross-sectional view of an executable solar artificial greenhouse outer wall structure according to the present invention.

FIG. 4 is a schematic cross-sectional view of an implementable solar thermal plate structure of the present invention.

FIG. 5 is a schematic cross-sectional view of an implementable deep buried pipe structure of the present invention.

FIG. 6 is a schematic diagram of the unfolded structure of the inner wall of an implementable solar collector tube of the present invention.

Description of reference numerals: 1. Photovoltaic power generation system; 2. Energy storage unit; 3. Energy release unit; 4. Hot water storage tank; 5. Cold water tank; 6. Deep buried pipe; 7. Heat pump unit; 8. Internal combustion engine power generation Unit; 9. Solar panel 10. Solar artificial greenhouse; 71. Air-cooled evaporator; 72. First water-cooled evaporator; 73. Second water-cooled evaporator; 74. Condenser; 75. Compressor; 101. First Electrochromic glass outer wall; 102, tempered glass; 91, second electrochromic glass outer wall; 92, solar collector tube; 61, deep buried tube inner tube; 62, deep buried tube outer tube.

Detailed ways

In order to make the above objects, features and advantages of the present invention more clearly understood, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

As shown in Figure 1, a clean cogeneration system integrating off-grid optical storage includes a photovoltaic power generation system 1, an energy storage unit 2, an energy release unit 3, a hot water storage tank 4, a cold water tank 5, and a deep buried pipe system 6. Heat pump unit 7, internal combustion engine generator unit 8, solar thermal panel 9 and solar artificial greenhouse 10, energy storage unit 2, energy release unit 3, hot water storage tank 4, cold water tank 5, heat pump unit 7, internal combustion engine generator unit 8 set In the solar artificial greenhouse 10 , the deep-buried pipe system 6 is embedded in the dry-hot rock formation below the ground, and the top of the solar artificial greenhouse 10 is provided with a photothermal panel 9 , and the medium outlet of the photothermal panel 9 is connected to the thermal medium inlet of the hot water storage tank 4 The outlet of the hot water storage tank 4 is respectively connected to the energy release unit 3, the deep buried pipe system 6 and the heat pump unit 7, and the water inlet of the cold water tank 5 is respectively connected to the water outlet of the energy release unit 3, the deep buried pipe system 6 and the heat pump unit 7 , the water outlet of the cold water tank 5 is connected to the medium inlet of the solar thermal plate 9, the heat pump unit 7 is connected to the entrance and exit of the deep buried pipe system 6; the photovoltaic power generation system 1, the energy storage unit 2, the energy release unit 3, and the heat pump unit 7 are connected in turn by cables, The internal combustion engine generator set 8 and the heat pump set 7 are connected by cables.

The solar artificial greenhouse 10 absorbs sunlight heat during the day and maintains the internal temperature at night, which helps the system to overcome the problems of large temperature difference between day and night and low ambient temperature at night in the plateau and alpine regions, and can maintain the normal startup and operation of each unit of the system.

The internal combustion engine generator set 8 and the heat pump set 7 are connected by cables, and the internal combustion engine generator set 8 is connected to the heat supply user side through the heat supply water pipeline and the heat supply return pipeline. The heat supply water pipeline is provided with a throttle valve. There is a heat transfer working medium flowing, and the internal combustion engine generator set 8 can be used as a supplement and backup for the photovoltaic and solar thermal systems, as well as the energy storage and energy release systems. Use an internal combustion engine to generate electricity and heat. It can effectively overcome the unstable characteristics of the use of renewable energy, and enable the system to have the ability to cope with continuous extreme weather in the plateau and alpine regions.

The photovoltaic power generation system 1, the energy storage unit 2, the energy release unit 3 and the heat pump unit 7 are connected in turn by cables. The energy storage unit 2 adopts a pumped compressed air energy storage unit. Long and other advantages, suitable for remote areas and plateau alpine regions.

The deep buried pipe system 6 stores the heat in the dry hot rock, and has the advantages of low system cost, long service life, high heat storage efficiency and long heat storage time.

1 and 2, the heat pump unit 7 adopts an air source heat pump, including an air-cooled evaporator 71, a first water-cooled evaporator 72, a second water-cooled evaporator 2, a condenser 74, a compressor 75 and a throttle valve, the first Both the water-cooled evaporator 72 and the second water-cooled evaporator 73 are connected in parallel with the air-cooled evaporator 71 through pipes. The outlet of the air-cooled evaporator 71 is connected to the inlet of the compressor 75, and the outlet of the compressor 75 is connected to the working medium inlet of the condenser 74. The condenser The working medium outlet of 74 is connected to the inlets of the air-cooled evaporator 71, the first water-cooled evaporator 72 and the second water-cooled evaporator 73, and the cold side of the condenser 74 is connected to the heating user through the heating water supply pipeline and the heating return water pipeline. The air source heat pump is simple in structure, low in use and maintenance cost, long in service life and high in heating efficiency, which can better meet the needs of users in plateau alpine regions.

Referring to FIG. 3 , the outer wall of the solar artificial greenhouse 10 is composed of a first electrochromic glass outer wall 101 and a tempered glass inner wall 102. A vacuum insulation layer is provided between the first electrochromic glass outer wall 101 and the tempered glass inner wall 102, and the sunlight during the day When sufficient, the electrochromic glass becomes transparent, and sunlight is used to heat up the solar artificial greenhouse 10; when there is no sunlight at night, the external ambient temperature is low, and the outer wall of the electrochromic glass becomes opaque, isolating indoor and external heat radiation, The vacuum insulation layer can well isolate heat conduction, which is conducive to maintaining the temperature of the solar artificial greenhouse and ensuring the normal operation of the system unit.

Referring to FIG. 4, the photothermal panel 9 is installed on the top of the solar artificial greenhouse 10, the photothermal panel 9 is covered with a second electrochromic glass outer wall 91, and an improved solar collector tube 92 is used inside, the second electrochromic glass outer wall 91 and A vacuum insulation layer is provided between the improved solar collector tubes 92 . During the day, the outer wall 91 of the second electrochromic glass becomes transparent, and the heat transfer medium in the solar collector tube 92 is heated by sunlight; at night, the electrochromic glass becomes opaque, which isolates the indoor and external heat radiation, and the second electrochromic glass becomes opaque. The vacuum insulation layer arranged between the color-changing glass outer wall 91 and the improved solar heat collecting tube 92 can well insulate heat conduction. After the optimized design of the improved solar collector tube, a spoiler is arranged in the tube, which can slow down the flow speed of the heat transfer medium and lengthen the flow path of the heat transfer medium, so that the heat transfer medium can exchange heat more effectively in the tube. The spoiler arranged in the tube can also change the flow state of the heat transfer working medium, strengthen the turbulent flow in the tube, and help to strengthen the heat exchange.

Referring to FIG. 5 , the deep buried pipe includes an inner pipe and an outer pipe, a vacuum insulation layer is provided between the inner pipe and the outer pipe, and fins are connected to the outer wall of the outer pipe. The vacuum insulation layer between the inner and outer tubes can effectively reduce the heat exchange between the inner and outer tubes. The connecting fins on the outer wall of the outer tube are beneficial to the high temperature heat transfer medium in the outer tube and the external heat exchange, which is beneficial to improve the heat exchange efficiency of the deep buried pipe system.

The inner wall of the solar collector tube 92 is provided with spoilers at intervals along the axial direction, and the spoilers can be staggered around the inner wall of the solar collector tube 92 , which is unfolded into a plane as shown in FIG. 6 .

Example 1

As shown in Figure 1, a clean cogeneration system integrating off-grid optical storage includes a photovoltaic power generation system 11, an energy storage unit 2, an energy release unit 3, a hot water storage tank 4, a cold water tank 5, and a deep buried pipe system 6. Heat pump unit 7, internal combustion engine generator unit 8, solar thermal panel 9 and solar artificial greenhouse 10, the photovoltaic power generation system 11, energy storage unit 2, energy release unit 3, hot water storage tank 4, cold water tank 5, deep buried The pipe system 6 , the heat pump unit 7 , the internal combustion engine generator unit 8 and the photothermal panel 9 are interconnected and connected to the user side through pipes and cables, and a heat transfer medium flows in the heating system.

When the sun is insufficient in winter, the hot dry rock is used as a heat source to supply heat to the heat pump unit 7 through the deep buried pipe system 6, and the energy storage unit 2 is used to provide power support for the heat pump unit 7. When the energy of the energy storage unit 2 is insufficient or exhausted , using the internal combustion engine generator set 8 to provide power support for the heat pump set 7 to ensure the smooth operation of the heat pump set 7 .

Using water as the heat transfer medium, the cold water flows through the deep buried pipe system 6 to absorb the heat in the dry hot rock and be heated, and then flows into the user side from the heat pump unit to heat the user side.

Example 2

As shown in Figure 1, a clean cogeneration system integrating off-grid optical storage includes a photovoltaic power generation system 11, an energy storage unit 2, an energy release unit 3, a hot water storage tank 4, a cold water tank 5, and a deep buried pipe system 6. Heat pump unit 7, internal combustion engine generator unit 8, solar thermal panel 9 and solar artificial greenhouse 10, the photovoltaic power generation system 11, energy storage unit 2, energy release unit 3, hot water storage tank 4, cold water tank 5, deep buried The pipe system 6 , the heat pump unit 7 , the internal combustion engine generator unit 8 and the photothermal panel 9 are interconnected and connected to the user side through pipes and cables, and a heat transfer medium flows in the heating system.

When the sunlight is sufficient in winter, the solar energy is used as a heat source to supply heat to the heat pump unit 7 through the photothermal system 9, and the photovoltaic power generation system 1 is used to provide power support for the heat pump unit 7, so as to ensure the smooth operation of the heat pump unit 7, and a hot water storage tank is used. 4. Store excess heat energy and use energy storage unit 2 to store excess power; use water as a heat transfer medium, cold water flows through the solar thermal system 9 to absorb the heat in the sunlight and be heated, and then flows into the user side from the heat pump unit 7, for the user Side heating.

Example 3

As shown in Figure 1, a clean cogeneration system integrating off-grid optical storage includes a photovoltaic power generation system 1, an energy storage unit 2, an energy release unit 3, a hot water storage tank 4, a cold water tank 5, and a deep buried pipe system 6. Heat pump unit 7, internal combustion engine generator unit 8, photothermal panel 9 and solar artificial greenhouse 10, the photovoltaic power generation system 1, energy storage unit, energy release unit, hot water storage tank, cold water tank, deep buried pipe, heat pump unit , the internal combustion engine generator set and the photothermal panel are connected to each other and connected to the user side through pipes and cables, and a heat transfer medium flows in the heating system.

In actual use, when there is no need for heating in summer, solar energy is used as the heat source to supply heat to the deep buried pipe system 6 through the hot water storage tank 4, and the photovoltaic power generation system 1 is used to provide electricity for the energy storage unit 2, and the thermal energy and electric energy are stored. For winter use.

Using water as the heat transfer medium, the cold water flows through the solar thermal system to absorb the heat in the sunlight and be heated, and then flows into the deep buried pipe system 6 to store the heat in the dry hot rock.

Claims (5)

1. The utility model provides an off-grid light stores up integrative clean combined heat and power system which characterized in that: comprises a photovoltaic power generation system (1), an energy storage unit (2), an energy release unit (3), a heat storage water tank (4), a cold water tank (5), a deep buried pipe system (6), a heat pump unit (7), an internal combustion engine generator unit (8), a photo-thermal plate (9) and a solar artificial greenhouse (10),

the energy storage unit (2), the energy release unit (3), the heat storage water tank (4), the cold water tank (5), the heat pump unit (7) and the internal combustion engine generator unit (8) are arranged in the solar artificial greenhouse (10), the deep buried pipe system (6) is buried in a dry and hot rock stratum below the ground, the photo-thermal plate (9) is arranged at the top end of the solar artificial greenhouse (10), a medium outlet of the photo-thermal plate (9) is communicated with a hot medium inlet of the heat storage water tank (4), an outlet of the heat storage water tank (4) is respectively communicated with the energy release unit (3), the deep buried pipe system (6) and the heat pump unit (7), a water inlet of the cold water tank (5) is respectively communicated with water outlets of the energy release unit (3), the deep buried pipe system (6) and the heat pump unit (7), a water outlet of the cold water tank (5) is communicated with a medium inlet of the photo-thermal plate (9), and the heat pump unit (7) is connected with an inlet and an outlet of the deep buried pipe system (6);

the photovoltaic power generation system (1), the energy storage unit (2), the energy release unit (3) and the heat pump unit (7) are sequentially connected through cables, and the electric energy output end of the internal combustion engine generator unit (8) is connected with the electric energy input end of the heat pump unit (7);

the energy storage unit (2) adopts a pumped compressed air energy storage unit, the heat pump unit (7) adopts an air source heat pump, and the internal combustion engine generator unit (8) and the heat pump unit (7) are connected with a heat supply user through a heat supply water supply pipeline and a heat supply water return pipeline; the outer wall of the solar artificial greenhouse (10) comprises a first electrochromic glass outer wall (101) and a toughened glass inner wall (102), and a vacuum heat-insulating layer is arranged between the first electrochromic glass outer wall (101) and the toughened glass inner wall (102); when sunlight is sufficient on the outer wall (101) of the first electrochromic glass in the daytime, the electrochromic glass becomes transparent, and the sunlight is utilized to heat the solar artificial greenhouse (10); when no sunshine exists at night, the external environment temperature is low, the outer wall of the electrochromic glass becomes opaque, and the indoor outward heat radiation is isolated; the outer surface of the light and heat collecting plate (9) is covered with a second electrochromic glass outer wall (91), a solar heat collecting pipe (92) is arranged in the light and heat plate (9), a heat collecting medium is filled in the solar heat collecting pipe (92), a vacuum heat insulating layer is arranged between the second electrochromic glass outer wall (91) and the solar heat collecting pipe (92), a vacuum space is arranged on the inner side of the second electrochromic glass outer wall (91), a heat collecting section of the heat collecting pipe (92) is arranged in the vacuum space, and two ends of the heat collecting pipe (92) are respectively communicated with the cold water tank (5) and the heat storage water tank (4); spoilers are arranged on the inner wall of the solar heat collecting pipe (92) at intervals; the outer wall (91) of the second electrochromic glass becomes transparent when sunlight is sufficient in the daytime, and heat transfer working media in the solar heat collecting pipe (92) are heated by utilizing the sunlight; at night, the electrochromic glass becomes opaque, and the indoor and outdoor heat radiation is isolated.

2. The off-grid light-storage integrated clean cogeneration system of claim 1, wherein: deeply bury system of pipe (6) and set gradually choke valve and water pump on the pipeline of cold water storage cistern (5), set gradually water pump and choke valve on the pipeline of heat pump set (7) to cold water storage cistern (5), set gradually water pump and choke valve on heat storage water storage cistern (4) to the pipeline of heat pump set (7), set gradually choke valve and water pump on the pipeline of delivery port to light and heat board (9) medium entry of cold water storage cistern (5).

3. The off-grid light-storage integrated clean cogeneration system of claim 1, wherein: the heat pump unit (7) comprises an air-cooled evaporator (71), a first water-cooled evaporator (72), a second water-cooled evaporator (73), a condenser (74) and a compressor (75), wherein the first water-cooled evaporator (72) and the second water-cooled evaporator (73) are connected in parallel with the air-cooled evaporator (71) through pipelines, an outlet of the air-cooled evaporator (71) is communicated with an inlet of the compressor (75), a working medium inlet of the condenser (74) is arranged at an outlet of the compressor (75), a working medium outlet of the condenser (74) is communicated with inlets of the air-cooled evaporator (71), the first water-cooled evaporator (72) and the second water-cooled evaporator (73), a cold side of the condenser (74) is connected with a heat supply user through a heat supply water supply pipeline and a heat supply water return pipeline, and the second water-cooled evaporator (73) is communicated with an inlet and an outlet of the deep buried pipe system (6).

4. The off-grid light-storage integrated clean cogeneration system of claim 1, wherein: the deep pipe burying system (6) comprises an inner pipe (61) and an outer pipe (62), a vacuum heat insulation layer is arranged between the inner pipe (61) and the outer pipe (62), and fins (63) are arranged on the outer wall of the outer pipe.

5. The heating and power supply method of the off-grid light and storage integrated clean cogeneration system according to any one of claims 1 to 4, characterized in that:

when the solar energy storage system is in a non-heat supply period, the photo-thermal plate (9) absorbs solar energy, supplies heat to the deep buried pipe system (6) through the heat storage water tank (4), the cold water tank (5) and the heat pump unit (7), stores the heat in dry and hot rocks, and provides electric energy for a user side by adopting the photovoltaic power generation system (11), the energy storage unit (2) and the energy release unit (3);

when the solar energy storage system is in a heat supply period and the illumination is sufficient, the photo-thermal plate (9) absorbs solar energy, heat is supplied to a user side and a deep buried pipe system (6) through the heat storage water tank (4), the cold water tank (5) and the heat pump unit (7), the heat demand of the user side is met, redundant heat is stored in hot dry rock, the photovoltaic power generation system (11) is adopted to provide electric energy for the user side and the energy storage unit (2), the electric quantity demand of the user side is met, and the redundant electric quantity is stored in the energy storage unit (2);

when the solar heat collector is in a heat supply period and sunlight is insufficient, the photo-thermal plate (9) absorbs solar energy, heat is supplied to a user side through the heat storage water tank (4), the cold water tank (5), the deep-buried pipe system (6) and the heat pump unit (7), the photovoltaic power generation system (11), the energy storage unit (2) and the energy release unit (3) are used for supplying electric energy to the user side, and when the photo-thermal and deep-buried pipe system (6) is insufficient in heat storage, the internal combustion engine generator set (8) is used as a supplement to continuously supply heat and electric quantity to the user side.

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