Heat recovery, utilization and management system and method for wind-solar-hydrogen thermal storage energy microgrid

Abstract

The present invention belongs to the technical field of thermal management of wind-solar-hydrogen storage energy microgrids, and proposes a heat recovery, utilization and management system and method for a wind-solar-hydrogen heat storage energy microgrid. The four-pipe air-cooled heat pump, the hot water storage tank, the cold water storage tank, the heat exchanger, the PV / T heat extraction section, the electrochemical cell section, the electrolysis hydrogen production system section and the hydrogen fuel cell group section, etc., are connected by pipelines to form a first loop, a second loop, a third loop, a fourth loop and a fifth loop, and the structure is simple. The constructed first loop, second loop, third loop, fourth loop and fifth loop can meet the cooling and heating needs of the PV / T heat extraction section, the electrochemical cell section, the electrolysis hydrogen production system section and the hydrogen fuel cell group section in multiple operating modes at the same time, ensuring the normal startup of the electrochemical cell section, the electrolysis hydrogen production system section and the hydrogen fuel cell group section under the low temperature environment of the plateau climate, and ensuring the supply effect of thermal energy to the external heating pipeline network.

Description

Technical Field

[0001] The present invention belongs to the technical field of thermal management of energy microgrids, and relates to a heat recovery, utilization and management system and method for a wind, solar and hydrogen thermal storage energy microgrid. Background Art

[0002] In the plateau climate environment, the reserves of wind and solar energy resources are huge and widely distributed, but the wind and photovoltaic power stations in such areas are usually far away from the load center, and the current cross-regional power grid scale and peak-shaving power station capacity are difficult to match their grid connection needs, resulting in insufficient wind and solar energy resource consumption capacity in the plateau area, and the risk of "abandoning wind and light" remains high. Hydrogen, as an energy carrier with high calorific value, high energy density and clean carbon-free, is an excellent energy storage and transportation medium. At the same time, water decomposition hydrogen production technology also has strong adaptability to power fluctuations. Integrating and coupling hydrogen-electricity conversion devices such as electrolyzers and fuel cells with wind power, photovoltaics and batteries to form a wind-solar-hydrogen storage integrated energy system is an important technical means to solve the problem of "abandoning wind and light". When managing the heat of wind-solar-hydrogen storage energy microgrids in the plateau climate environment, the highly volatile wind and light power resources can be converted into hydrogen energy for local consumption, and hydrogen storage can also be used to participate in the peak regulation of the power system through the mutual conversion of electricity and hydrogen, thereby enhancing the stability of the power system.

[0003] The inventors found that when the traditional wind-solar-hydrogen storage energy microgrid system is operated in plateau areas, its electrochemical cells and electrolytic hydrogen production system / hydrogen fuel cell group have problems such as large heat discharge during peak operation and difficulty in starting during low temperature periods. The comprehensive recovery of solar heat, electrochemical cell heat release, and electrolytic hydrogen production system / hydrogen fuel cell group heat, combined with plateau air energy for microgrid internal thermal management and external heating, is an effective means to solve the above problems. Summary of the invention

[0004] In order to solve the above problems, the present invention proposes a heat recovery, utilization and management system and method for a wind-solar-hydrogen thermal storage energy microgrid. By constructing the first loop, the second loop, the third loop, the fourth loop and the fifth loop, it can meet the cooling and heating needs of the solar photovoltaic / thermal (PV / T) heat extraction section, the electrochemical cell section, the electrolysis hydrogen production system section and the hydrogen fuel cell group section under multiple operating modes, ensuring the normal startup of the electrochemical cell section, the electrolysis hydrogen production system section and the hydrogen fuel cell group section under the low temperature environment of the plateau climate, and ensuring the supply of thermal energy to the external heating pipeline network.

[0005] In order to achieve the above objectives, in the first aspect, the present invention provides a heat recovery, utilization and management system and method for a wind-solar-hydrogen thermal storage energy microgrid, which adopts the following technical solutions:

[0006] The heat recovery, utilization and management system and method of the wind-solar-hydrogen thermal storage energy microgrid includes a four-pipe air-cooled heat pump, a hot water storage tank, a cold water storage tank, a heat exchanger, a PV / T heat extraction section, an electrochemical cell section, an electrolysis hydrogen production system section and a hydrogen fuel cell stack section;

[0007] The four-pipe air-cooling heat pump is connected to the hot water storage tank through a pipeline to form a first loop; the four-pipe air-cooling heat pump is connected to the cold water storage tank through a pipeline to form a second loop; the hot water storage tank is connected to the heat exchanger through a pipeline to form a third loop; the hot water storage tank is connected to the PV / T heat extraction section, the electrochemical cell section, the electrolysis hydrogen production system section and the hydrogen fuel cell group section through a pipeline to form a fourth loop; the cold water storage tank is connected to the PV / T heat extraction section, the electrochemical cell section, the electrolysis hydrogen production system section and the hydrogen fuel cell group section through a pipeline to form a fifth loop.

[0008] Furthermore, in the first circuit, the water supply pipe from the four-pipe air-cooling heat pump to the hot water storage tank is provided with a first butterfly valve and a seventh butterfly valve; the water supply pipe from the hot water storage tank to the four-pipe air-cooling heat pump is provided with a sixth butterfly valve, a first dirt remover, a first water pump, a pressure gauge, a check valve, a fifth butterfly valve and a second butterfly valve.

[0009] Furthermore, in the second circuit, a fourth butterfly valve and a fifteenth butterfly valve are provided on the water supply pipe from the four-pipe air-cooling heat pump to the cold water storage tank; a fourteenth butterfly valve, a second sludge remover, a second water pump, a sixteenth butterfly valve and a third butterfly valve are provided on the water supply pipe from the cold water storage tank to the four-pipe air-cooling heat pump.

[0010] Furthermore, in the third circuit, an eighth butterfly valve, a third water pump, a ninth butterfly valve and a second electric valve are arranged on the water supply pipe from the heat storage tank to the heat exchanger; a third electric valve and a tenth butterfly valve are arranged on the water supply pipe from the heat exchanger to the heat storage tank.

[0011] Furthermore, in the fourth circuit, an eighth butterfly valve, a third water pump, a ninth butterfly valve and a first electric valve are provided on the output water pipe of the hot water storage tank, and a fourth electric valve and a tenth butterfly valve are provided on the input water pipe of the hot water storage tank.

[0012] Furthermore, in the fifth loop, a twelfth butterfly valve, a fourth water pump, a thirteenth butterfly valve and a sixth electric valve are provided on the output water pipe of the cold water storage tank, and a fifth electric valve is provided on the input water pipe of the cold water storage tank; the PV / T heat extraction section, the electrochemical cell section, the electrolysis hydrogen production system section and the hydrogen fuel cell group section are connected in parallel.

[0013] Furthermore, all diameter-changing locations in the system are provided with reducing pipes.

[0014] Furthermore, all pipe section connections in the system are provided with rubber flexible joints.

[0015] In order to achieve the above objectives, in a second aspect, the present invention also provides a method for heat recovery, utilization and management of a wind-solar-hydrogen thermal storage energy microgrid, which adopts the following technical solutions:

[0016] A method for heat recovery, utilization and management of a wind-solar-hydrogen thermal storage energy microgrid adopts the heat recovery, utilization and management system of the wind-solar-hydrogen thermal storage energy microgrid as described in the first aspect, including: utilizing the first loop, the second loop, the third loop, the fourth loop and the fifth loop to provide cooling and heating to the PV / T heat extraction section, the electrochemical cell section, the electrolysis hydrogen production system section and the hydrogen fuel cell group section in multiple operating modes, and providing thermal energy to an external heating pipeline network.

[0017] Further, the four-pipe air-cooling heat pump is controlled to start the heating mode, the first butterfly valve, the seventh butterfly valve, the sixth butterfly valve, the first water pump, the fifth butterfly valve and the second butterfly valve are opened, the first circuit is operated, and the four-pipe air-cooling heat pump is used to heat the hot water storage tank;

[0018] The eighth butterfly valve, the third water pump, the ninth butterfly valve, the second electric valve, the heat exchanger, the third electric valve and the tenth butterfly valve are opened to operate the third circuit; the heat from the hot water storage tank is supplied to the heat exchanger and to the external heating network;

[0019] Control the four-pipe air-cooled heat pump to start the cooling mode, open the fourth butterfly valve, the fifteenth butterfly valve, the fourteenth butterfly valve, the second water pump, the sixteenth butterfly valve and the third butterfly valve, and operate the second circuit; use the four-pipe air-cooled heat pump to supply cooling to the cold water storage tank;

[0020] Open the twelfth butterfly valve, the fourth water pump, the thirteenth butterfly valve, the sixth electric valve, the PV / T heat extraction section, the electrochemical cell section, the electrolysis hydrogen production system section, the hydrogen fuel cell group section, the fifth electric valve, and the eleventh butterfly valve, and operate the fifth circuit; after the electrochemical cell section, the electrolysis hydrogen production system section, and the hydrogen fuel cell group section are started normally, the cold water storage tank provides cooling for the electrochemical cell section, the electrolysis hydrogen production system section, and the hydrogen fuel cell group section.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] In the present invention, a four-pipe air-cooling heat pump is connected to a hot water storage tank through a pipeline to form a first loop; a four-pipe air-cooling heat pump is connected to a cold water storage tank through a pipeline to form a second loop; the hot water storage tank is connected to a heat exchanger through a pipeline to form a third loop; the hot water storage tank is connected to a PV / T heat extraction section, an electrochemical cell section, an electrolysis hydrogen production system section and a hydrogen fuel cell group section through a pipeline to form a fourth loop; the cold water storage tank is connected to a PV / T heat extraction section, an electrochemical cell section, an electrolysis hydrogen production system section and a hydrogen fuel cell group section through a pipeline to form a fifth loop; A four-pipe air-cooled heat pump provides heating and cooling for the hot water storage tank and the cold water storage tank respectively. It has a simple structure and can meet the cooling and heating needs of the PV / T heat extraction section, electrochemical cell section, electrolysis hydrogen production system section and hydrogen fuel cell group section under multiple operating modes through the constructed first loop, second loop, third loop, fourth loop and fifth loop, ensuring the normal startup of the electrochemical cell section, electrolysis hydrogen production system section and hydrogen fuel cell group section under the low temperature environment of the plateau climate, and ensuring the supply of thermal energy to the external heating pipeline network. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings in the specification that constitute a part of this embodiment are used to provide a further understanding of this embodiment. The schematic embodiments of this embodiment and their descriptions are used to explain this embodiment and do not constitute improper limitations on this embodiment.

[0024] Figure 1 This is a schematic diagram of the system structure of Embodiment 1 of the present invention;

[0025] Among them, 1. Four-pipe air-cooled heat pump; 2. Hot water storage tank; 3. Cold water storage tank; 4. Heat exchanger; 5. PV / T heat extraction section; 6. Electrochemical battery section; 7. Electrolysis hydrogen production system section; 8. Hydrogen fuel cell group section; 9. Reducer; 10. Rubber flexible joint; 11. First butterfly valve; 12. Second butterfly valve; 13. Third butterfly valve; 14. Fourth butterfly valve; 15. Fifth butterfly valve; 16. Sixth butterfly valve; 17. Seventh butterfly valve; 18. Eighth butterfly valve; 19. Ninth butterfly valve; 20. Tenth butterfly valve; 21 , the eleventh butterfly valve; 22, the twelfth butterfly valve; 23, the thirteenth butterfly valve; 24, the fourteenth butterfly valve; 25, the fifteenth butterfly valve; 26, the sixteenth butterfly valve; 27, the check valve; 28, the pressure gauge; 29, the first dirt remover; 30, the second dirt remover; 31, the first electric valve; 32, the second electric valve; 33, the third electric valve; 34, the fourth electric valve; 35, the fifth electric valve; 36, the sixth electric valve; 37, the first water pump; 38, the second water pump; 39, the third water pump; 40, the fourth water pump. DETAILED DESCRIPTION

[0026] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0027] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0028] Embodiment 1:

[0029] like Figure 1 As shown, this embodiment provides a heat recovery, utilization and management system for a wind-solar-hydrogen thermal storage energy microgrid, including a four-pipe air-cooled heat pump 1, a hot water storage tank 2, a cold water storage tank 3, a heat exchanger 4, a PV / T heat extraction section 5, an electrochemical cell section 6, an electrolysis hydrogen production system section 7 and a hydrogen fuel cell group section 8, etc.

[0030] In some embodiments, the system is further provided with a reducer 9, a rubber flexible joint 10, a check valve 27, a pressure gauge 28, a first dirt remover 29, and a second dirt remover 30. The reducer 9 is used to process a certain pipe section at the connection of pipe sections with different pipe diameters, and a reducer 9 is provided at any reducer in the system; the rubber flexible joint 10 is used to process the connection between two pipe sections, and a rubber flexible joint 10 is provided at any pipe section connection in the system; the check valve 27 is provided at the outlet of the water pump to prevent the medium from flowing back; the pressure gauge 28 is used to detect the pressure state of each pipe section; the first dirt remover 29 and the second dirt remover 30 are provided on the pipe section from the heat storage / cold storage water tank to the water pump to prevent impurities in the pipeline medium from entering the transmission equipment.

[0031] The system also includes a first butterfly valve 11, a second butterfly valve 12, a third butterfly valve 13, a fourth butterfly valve 14, a fifth butterfly valve 15, a sixth butterfly valve 16, a seventh butterfly valve 17, an eighth butterfly valve 18, a ninth butterfly valve 19, a tenth butterfly valve 20, an eleventh butterfly valve 21, a twelfth butterfly valve 22, a thirteenth butterfly valve 23, a fourteenth butterfly valve 24, a fifteenth butterfly valve 25, a sixteenth butterfly valve 26, a first electric valve 31, a second electric valve 32, a third electric valve 33, a fourth electric valve 34, a fifth electric valve 35, a sixth electric valve 36, a first water pump 37, a second water pump 38, a third water pump 39 and a fourth water pump 40.

[0032] The four-pipe air-cooled heat pump 1, the first butterfly valve 11, the seventh butterfly valve 17, the hot water storage tank 2, the sixth butterfly valve 16, the first water pump 37, the fifth butterfly valve 15, and the second butterfly valve 12 constitute a first circuit.

[0033] The four-pipe air-cooled heat pump 1, the fourth butterfly valve 14, the fifteenth butterfly valve 25, the cold water storage tank 3, the fourteenth butterfly valve 24, the second water pump 38, the sixteenth butterfly valve 26, and the third butterfly valve 13 constitute a second circuit.

[0034] The hot water storage tank 2, the eighth butterfly valve 18, the third water pump 39, the ninth butterfly valve 19, the second electric valve 32, the heat exchanger 4, the third electric valve 33, and the tenth butterfly valve 20 constitute a third circuit.

[0035] The hot water storage tank 2, the eighth butterfly valve 18, the third water pump 39, the ninth butterfly valve 19, the first electric valve 31, the PV / T heat extraction section 5, the electrochemical cell section 6, the electrolysis hydrogen production system section 7, the hydrogen fuel cell group section 8, the fourth electric valve 34, and the tenth butterfly valve 20 constitute a fourth loop.

[0036] The cold water storage tank 3, the twelfth butterfly valve 22, the fourth water pump 40, the thirteenth butterfly valve 23, the sixth electric valve 36, the PV / T heat extraction section 5, the electrochemical cell section 6, the electrolysis hydrogen production system section 7, the hydrogen fuel cell group section 8, the fifth electric valve 35, and the eleventh butterfly valve 21 constitute a fifth loop.

[0037] In some embodiments, all water pumps are variable frequency water pumps. The butterfly valve and electric valve have an adjustable flow range of zero to rated flow. Each pipeline can be provided with a reducer, a rubber flexible joint, a check valve, a pressure gauge, and a decontaminant as required.

[0038] In some embodiments, the system can operate in any one of a plurality of operating modes, including a first operating mode, a second operating mode, a third operating mode, a fourth operating mode, a fifth operating mode, and a sixth operating mode.

[0039] It is understandable that, in view of the particularity of the plateau climate, on the one hand, when electrolyzers, fuel cells, batteries and other equipment are operated in the low temperature and low oxygen environment of the plateau, there are energy conversion and storage and transportation characteristics such as difficulty in starting and reduced capacity; on the other hand, when the wind-solar hydrogen storage system is connected to the power grid nearby, it will face uncertainty and obvious time-varying characteristics of the local plateau power supply load, making it difficult to directly apply the existing wind-solar hydrogen storage system energy supply mode for urban residents and industrial production to the plateau area. The present invention proposes different operating modes for the plateau climate, which can solve the problem of the system not running or difficult to run under complex conditions in the plateau area, and make full use of the system heat to improve the system energy utilization rate.

[0040] The first operation mode includes: controlling the four-pipe air-cooling heat pump 1, starting the heating mode, opening the first butterfly valve 11, opening the seventh butterfly valve 17, opening the sixth butterfly valve 16, opening the first water pump 37, opening the fifth butterfly valve 15, opening the second butterfly valve 12, and running the first loop. The four-pipe air-cooling heat pump is used to supply heat to the hot water storage tank.

[0041] Open the eighth butterfly valve 18, open the third water pump 39, open the ninth butterfly valve 19, open the first electric valve 31, open the PV / T heat extraction section 5, the electrochemical cell section 6, the electrolysis hydrogen production system section 7, and the hydrogen fuel cell group section 8, open the fourth electric valve 34, open the tenth butterfly valve 20, and operate the fourth loop. When the ambient temperature is low and the electrochemical cell section 6, the electrolysis hydrogen production system section 7, and the hydrogen fuel cell group section 8 cannot start normally, the hot water storage tank provides heat for the electrochemical cell section 6, the electrolysis hydrogen production system section 7, and the hydrogen fuel cell group section 8 to ensure that the electrochemical cell section 6, the electrolysis hydrogen production system section 7, and the hydrogen fuel cell group section 8 start.

[0042] The second operation mode includes: controlling the four-pipe air-cooling heat pump 1, starting the heating mode, opening the first butterfly valve 11, opening the seventh butterfly valve 17, opening the sixth butterfly valve 16, opening the first water pump 37, opening the fifth butterfly valve 15, opening the second butterfly valve 12, and running the first loop. The four-pipe air-cooling heat pump is used to supply heat to the hot water storage tank.

[0043] Open the eighth butterfly valve 18, open the third water pump 39, open the ninth butterfly valve 19, open the first electric valve 31, open the PV / T heat extraction section 5, the electrochemical cell section 6, the electrolysis hydrogen production system section 7, and the hydrogen fuel cell group section 8, open the fourth electric valve 34, open the tenth butterfly valve 20, and operate the fourth loop. When the ambient temperature is low and the electrochemical cell section 6, the electrolysis hydrogen production system section 7, and the hydrogen fuel cell group section 8 cannot start normally, the hot water storage tank provides heat for the electrochemical cell section 6, the electrolysis hydrogen production system section 7, and the hydrogen fuel cell group section 8 to ensure that the electrochemical cell section 6, the electrolysis hydrogen production system section 7, and the hydrogen fuel cell group section 8 start.

[0044] The eighth butterfly valve 18 is opened, the third water pump 39 is opened, the ninth butterfly valve 19 is opened, the second electric valve 32 is opened, the heat exchanger 4 is opened, the third electric valve 33 is opened, the tenth butterfly valve 20 is opened, and the third circuit is operated. When the heat storage tank has excess heat, the heat is supplied to the heat exchanger 4 and supplied to the external heating network.

[0045] The third operation mode includes: controlling the four-pipe air-cooling heat pump 1, starting the cooling mode, opening the fourth butterfly valve 14, opening the fifteenth butterfly valve 25, opening the fourteenth butterfly valve 24, opening the second water pump 38, opening the sixteenth butterfly valve 26, opening the third butterfly valve 13, and operating the second circuit. The four-pipe air-cooling heat pump is used to supply cooling to the cold storage water tank.

[0046] Open the twelfth butterfly valve 22, open the fourth water pump 40, open the thirteenth butterfly valve 23, open the sixth electric valve 36, open the PV / T heat extraction section 5, the electrochemical cell section 6, the electrolysis hydrogen production system section 7, and the hydrogen fuel cell group section 8, open the fifth electric valve 35, open the eleventh butterfly valve 21, and operate the fifth loop. After the electrochemical cell section 6, the electrolysis hydrogen production system section 7, and the hydrogen fuel cell group section 8 are normally started, the cold water storage tank provides cold capacity for the electrochemical cell section 6, the electrolysis hydrogen production system section 7, and the hydrogen fuel cell group section 8.

[0047] The fourth operation mode includes: controlling the four-pipe air-cooling heat pump 1, starting the heating mode, opening the first butterfly valve 11, opening the seventh butterfly valve 17, opening the sixth butterfly valve 16, opening the first water pump 37, opening the fifth butterfly valve 15, opening the second butterfly valve 12, and operating the first loop. The four-pipe air-cooling heat pump is used to supply heat to the hot water storage tank.

[0048] Open the eighth butterfly valve 18, open the third water pump 39, open the ninth butterfly valve 19, open the first electric valve 31, open the PV / T heat extraction section 5, the electrochemical cell section 6, the electrolysis hydrogen production system section 7, and the hydrogen fuel cell group section 8, open the fourth electric valve 34, open the tenth butterfly valve 20, and operate the fourth loop. When the ambient temperature is low and the electrochemical cell section 6, the electrolysis hydrogen production system section 7, and the hydrogen fuel cell group section 8 cannot start normally, the hot water storage tank provides heat for the electrochemical cell section 6, the electrolysis hydrogen production system section 7, and the hydrogen fuel cell group section 8 to ensure that the electrochemical cell section 6, the electrolysis hydrogen production system section 7, and the hydrogen fuel cell group section 8 start.

[0049] The four-pipe air-cooled heat pump 1 is controlled to start the cooling mode, the fourth butterfly valve 14 is opened, the fifteenth butterfly valve 25 is opened, the fourteenth butterfly valve 24 is opened, the second water pump 38 is opened, the sixteenth butterfly valve 26 is opened, the third butterfly valve 13 is opened, and the second circuit is operated. The four-pipe air-cooled heat pump is used to supply cooling to the cold water storage tank.

[0050] The fifth operation mode includes: controlling the four-pipe air-cooling heat pump 1, starting the heating mode, opening the first butterfly valve 11, opening the seventh butterfly valve 17, opening the sixth butterfly valve 16, opening the first water pump 37, opening the fifth butterfly valve 15, opening the second butterfly valve 12, and running the first loop. The four-pipe air-cooling heat pump is used to supply heat to the hot water storage tank.

[0051] Open the eighth butterfly valve 18, open the third water pump 39, open the ninth butterfly valve 19, open the first electric valve 31, open the PV / T heat extraction section 5, the electrochemical cell section 6, the electrolysis hydrogen production system section 7, and the hydrogen fuel cell group section 8, open the fourth electric valve 34, open the tenth butterfly valve 20, and operate the fourth loop. When the ambient temperature is low and the electrochemical cell section 6, the electrolysis hydrogen production system section 7, and the hydrogen fuel cell group section 8 cannot start normally, the hot water storage tank provides heat for the electrochemical cell section 6, the electrolysis hydrogen production system section 7, and the hydrogen fuel cell group section 8 to ensure that the electrochemical cell section 6, the electrolysis hydrogen production system section 7, and the hydrogen fuel cell group section 8 start.

[0052] The eighth butterfly valve 18 is opened, the third water pump 39 is opened, the ninth butterfly valve 19 is opened, the second electric valve 32 is opened, the heat exchanger 4 is opened, the third electric valve 33 is opened, the tenth butterfly valve 20 is opened, and the third circuit is operated. When the heat storage tank has excess heat, the heat is supplied to the heat exchanger 4 and supplied to the external heating network.

[0053] The four-pipe air-cooled heat pump 1 is controlled to start the cooling mode, the fourth butterfly valve 14 is opened, the fifteenth butterfly valve 25 is opened, the fourteenth butterfly valve 24 is opened, the second water pump 38 is opened, the sixteenth butterfly valve 26 is opened, the third butterfly valve 13 is opened, and the second circuit is operated. The four-pipe air-cooled heat pump is used to supply cooling to the cold water storage tank.

[0054] The sixth operation mode includes: controlling the four-pipe air-cooling heat pump 1, starting the heating mode, opening the first butterfly valve 11, opening the seventh butterfly valve 17, opening the sixth butterfly valve 16, opening the first water pump 37, opening the fifth butterfly valve 15, opening the second butterfly valve 12, and running the first loop. The four-pipe air-cooling heat pump is used to supply heat to the hot water storage tank.

[0055] Open the eighth butterfly valve 18, open the third water pump 39, open the ninth butterfly valve 19, open the second electric valve 32, open the heat exchanger 4, open the third electric valve 33, open the tenth butterfly valve 20, and operate the third circuit. The heat of the hot water storage tank is supplied to the heat exchanger 4 and the external heating network.

[0056] The four-pipe air-cooled heat pump 1 is controlled to start the cooling mode, the fourth butterfly valve 14 is opened, the fifteenth butterfly valve 25 is opened, the fourteenth butterfly valve 24 is opened, the second water pump 38 is opened, the sixteenth butterfly valve 26 is opened, the third butterfly valve 13 is opened, and the second circuit is operated. The four-pipe air-cooled heat pump is used to supply cooling to the cold water storage tank.

[0057] Open the twelfth butterfly valve 22, open the fourth water pump 40, open the thirteenth butterfly valve 23, open the sixth electric valve 36, open the PV / T heat extraction section 5, the electrochemical cell section 6, the electrolysis hydrogen production system section 7, and the hydrogen fuel cell group section 8, open the fifth electric valve 35, open the eleventh butterfly valve 21, and operate the fifth loop. After the electrochemical cell section 6, the electrolysis hydrogen production system section 7, and the hydrogen fuel cell group section 8 are normally started, the cold water storage tank provides cold capacity for the electrochemical cell section 6, the electrolysis hydrogen production system section 7, and the hydrogen fuel cell group section 8.

[0058] Embodiment 2:

[0059] The present embodiment provides a method for heat recovery, utilization and management of a wind-solar-hydrogen thermal storage energy microgrid, which adopts the heat recovery, utilization and management system of the wind-solar-hydrogen thermal storage energy microgrid as described in Example 1, including: utilizing the first loop, the second loop, the third loop, the fourth loop and the fifth loop to provide cooling and heating to the PV / T heat extraction section, the electrochemical cell section, the electrolysis hydrogen production system section and the hydrogen fuel cell group section in multiple operating modes, and providing thermal energy to the external heating pipeline network.

[0060] Optionally, the four-pipe air-cooling heat pump is controlled to start the heating mode, the first butterfly valve, the seventh butterfly valve, the sixth butterfly valve, the first water pump, the fifth butterfly valve and the second butterfly valve are opened, the first circuit is operated, and the four-pipe air-cooling heat pump is used to heat the hot water storage tank;

[0061] The eighth butterfly valve, the third water pump, the ninth butterfly valve, the second electric valve, the heat exchanger, the third electric valve and the tenth butterfly valve are opened to operate the third circuit; the heat from the hot water storage tank is supplied to the heat exchanger and to the external heating network;

[0062] Control the four-pipe air-cooled heat pump to start the cooling mode, open the fourth butterfly valve, the fifteenth butterfly valve, the fourteenth butterfly valve, the second water pump, the sixteenth butterfly valve and the third butterfly valve, and operate the second circuit; use the four-pipe air-cooled heat pump to supply cooling to the cold water storage tank;

[0063] Open the twelfth butterfly valve, the fourth water pump, the thirteenth butterfly valve, the sixth electric valve, the PV / T heat extraction section, the electrochemical cell section, the electrolysis hydrogen production system section, the hydrogen fuel cell group section, the fifth electric valve, and the eleventh butterfly valve, and operate the fifth circuit; after the electrochemical cell section, the electrolysis hydrogen production system section, and the hydrogen fuel cell group section are started normally, the cold water storage tank provides cooling for the electrochemical cell section, the electrolysis hydrogen production system section, and the hydrogen fuel cell group section.

[0064] The above description is only a preferred embodiment of the present embodiment and is not intended to limit the present embodiment. For those skilled in the art, the present embodiment may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present embodiment shall be included in the protection scope of the present embodiment.

Claims

1. The heat recovery, utilization and management system of the wind-solar-hydrogen thermal storage energy microgrid is characterized by: It includes a four-pipe air-cooled heat pump, a hot water storage tank, a cold water storage tank, a heat exchanger, a PV / T heat extraction section, an electrochemical cell section, an electrolysis hydrogen production system section, and a hydrogen fuel cell group section; The four-pipe air-cooling heat pump is connected to the hot water storage tank through a pipeline to form a first loop; the four-pipe air-cooling heat pump is connected to the cold water storage tank through a pipeline to form a second loop; the hot water storage tank is connected to the heat exchanger through a pipeline to form a third loop; the hot water storage tank is connected to the PV / T heat extraction section, the electrochemical cell section, the electrolysis hydrogen production system section and the hydrogen fuel cell group section through a pipeline to form a fourth loop; the cold water storage tank is connected to the PV / T heat extraction section, the electrochemical cell section, the electrolysis hydrogen production system section and the hydrogen fuel cell group section through a pipeline to form a fifth loop; In the fifth loop, the output water pipe of the cold water storage tank is provided with a twelfth butterfly valve, a fourth water pump, a thirteenth butterfly valve and a sixth electric valve, and the input water pipe of the cold water storage tank is provided with a fifth electric valve; the PV / T heat extraction section, the electrochemical cell section, the electrolysis hydrogen production system section and the hydrogen fuel cell group section are connected in parallel; The first loop, the second loop, the third loop, the fourth loop and the fifth loop are used to provide cooling and heating to the PV / T heat extraction section, the electrochemical cell section, the electrolysis hydrogen production system section and the hydrogen fuel cell group section in various operating modes, and to provide thermal energy to an external heating pipeline network.

2. The heat recovery, utilization and management system of the wind-solar-hydrogen thermal storage energy microgrid according to claim 1 is characterized in that: In the first circuit, the first butterfly valve and the seventh butterfly valve are arranged on the water supply pipe from the four-pipe air-cooling heat pump to the hot water storage tank; the sixth butterfly valve, the first dirt remover, the first water pump, the pressure gauge, the check valve, the fifth butterfly valve and the second butterfly valve are arranged on the water supply pipe from the hot water storage tank to the four-pipe air-cooling heat pump.

3. The heat recovery, utilization and management system of the wind-solar-hydrogen thermal storage energy microgrid according to claim 1 is characterized in that: In the second circuit, the fourth butterfly valve and the fifteenth butterfly valve are arranged on the water supply pipe from the four-pipe air-cooling heat pump to the cold water storage tank; the fourteenth butterfly valve, the second dirt remover, the second water pump, the sixteenth butterfly valve and the third butterfly valve are arranged on the water supply pipe from the cold water storage tank to the four-pipe air-cooling heat pump.

4. The heat recovery, utilization and management system of the wind-solar-hydrogen thermal storage energy microgrid according to claim 1 is characterized in that: In the third loop, the water supply pipeline from the heat storage tank to the heat exchanger is provided with an eighth butterfly valve, a third water pump, a ninth butterfly valve and a second electric valve; the water supply pipeline from the heat exchanger to the heat storage tank is provided with a third electric valve and a tenth butterfly valve.

5. The heat recovery, utilization and management system of the wind-solar-hydrogen thermal storage energy microgrid according to claim 1 is characterized in that: In the fourth loop, the output water pipe of the hot water storage tank is provided with an eighth butterfly valve, a third water pump, a ninth butterfly valve and a first electric valve, and the input water pipe of the hot water storage tank is provided with a fourth electric valve and a tenth butterfly valve.

6. The heat recovery, utilization and management system of the wind-solar-hydrogen thermal storage energy microgrid according to claim 1 is characterized in that: All diameter changes in the system are equipped with reducing pipes.

7. The heat recovery, utilization and management system of the wind-solar-hydrogen thermal storage energy microgrid according to claim 1 is characterized in that: All pipe connections in the system are equipped with rubber flexible joints.

8. A method for heat recovery, utilization and management of a wind-solar-hydrogen thermal storage energy microgrid, characterized in that: A heat recovery, utilization and management system of a wind-solar-hydrogen thermal storage energy microgrid as described in any one of claims 1 to 7 is adopted, including: utilizing the first loop, the second loop, the third loop, the fourth loop and the fifth loop to provide cooling and heating to the PV / T heat extraction section, the electrochemical cell section, the electrolysis hydrogen production system section and the hydrogen fuel cell group section in multiple operating modes, and providing thermal energy to an external heating pipeline network.

9. The heat recovery, utilization and management method of the wind-solar-hydrogen thermal storage energy microgrid according to claim 8 is characterized in that: Control the four-pipe air-cooling heat pump to start the heating mode, open the first butterfly valve, the seventh butterfly valve, the sixth butterfly valve, the first water pump, the fifth butterfly valve and the second butterfly valve, operate the first circuit, and use the four-pipe air-cooling heat pump to heat the hot water storage tank; The eighth butterfly valve, the third water pump, the ninth butterfly valve, the second electric valve, the heat exchanger, the third electric valve and the tenth butterfly valve are opened to operate the third circuit; the heat from the hot water storage tank is supplied to the heat exchanger and to the external heating network; Control the four-pipe air-cooled heat pump to start the cooling mode, open the fourth butterfly valve, the fifteenth butterfly valve, the fourteenth butterfly valve, the second water pump, the sixteenth butterfly valve and the third butterfly valve, and operate the second circuit; use the four-pipe air-cooled heat pump to supply cooling to the cold water storage tank; Open the twelfth butterfly valve, the fourth water pump, the thirteenth butterfly valve, the sixth electric valve, the PV / T heat extraction section, the electrochemical cell section, the electrolysis hydrogen production system section, the hydrogen fuel cell group section, the fifth electric valve, and the eleventh butterfly valve, and operate the fifth circuit; after the electrochemical cell section, the electrolysis hydrogen production system section, and the hydrogen fuel cell group section are started normally, the cold water storage tank provides cooling for the electrochemical cell section, the electrolysis hydrogen production system section, and the hydrogen fuel cell group section.

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