Power, cold and heat multi-combined supply comprehensive utilization system and method based on hydrogen energy

Abstract

The invention belongs to the technical field of hydrogen energy comprehensive utilization, and particularly discloses an electricity, cold and heat multi-combined supply comprehensive utilization system and method based on hydrogen energy, and the electricity, cold and heat multi-combined supply comprehensive utilization system comprises a hydrogen fuel cell system, a heat exchanger, a hydrogen internal combustion engine, a flue gas hot water type lithium bromide unit and a ground source heat pump system. Cooling water of a hydrogen fuel cell system cooling pipe network exchanges heat with a first circulating medium of a heat system in a heat exchanger, and high-temperature flue gas of a hydrogen internal combustion engine flue gas pipe network and cylinder sleeve water of a cylinder sleeve water pipe network exchange heat with the first circulating medium in a flue gas hot water type lithium bromide unit. And the second circulating medium of the cooling system is cooled in the flue gas hot water type lithium bromide unit. The ground source heat pump system comprises a ground source heat pump unit which is used for heat exchange between low-temperature circulating water on the ground source heat pump rock-soil side and a first circulating medium. Hydrogen energy is fully utilized, waste heat generated by power generation of the hydrogen fuel cell and the hydrogen internal combustion engine is utilized for heating and cooling, and gradient utilization of hydrogen energy is achieved.

Description

Technical Field

[0001] The present invention belongs to the technical field of comprehensive utilization of hydrogen energy, and in particular relates to a system and method for comprehensive utilization of electricity, cooling and heat multi-generation based on hydrogen energy. Background Art

[0002] At present, hydrogen energy has gradually become a new component of the energy system. As a clean and efficient energy alternative, it has gradually attracted much attention. At the same time, the vigorous development of renewable energy and the cascade utilization of energy have become an effective driving force for "carbon peak and carbon neutrality".

[0003] The application of hydrogen energy in civil construction is mainly through the generation of electricity through fuel cells or hydrogen internal combustion engines. The hydrogen fuel cell system is a device that generates electricity by electrochemical reaction between hydrogen and oxygen. The reaction environment is a high-temperature environment and needs to be cooled. The high-temperature cooling water generated can be used for combined heat and power. The hydrogen internal combustion engine system is a power generation device that converts the heat energy generated by hydrogen during combustion into mechanical energy. During the power generation process, high-temperature flue gas and high-temperature cylinder jacket water are generated. Through conversion, trigeneration of heat, cooling and electricity can be achieved to achieve efficient use of energy.

[0004] In order to ensure the reliability and sustainability of hydrogen energy heating and cooling, the shortage of heating or cooling can be supplemented by shallow geothermal heat pump technology - ground source heat pump system. The ground source heat pump system is a system that uses the heat storage of the soil as the low-potential energy of the heat pump to generate high-potential energy for heating and cooling. According to actual usage, the amount of heat taken for heating in winter in the north is generally much greater than the amount of heat released for cooling. In this scenario, long-term heat extraction from the ground will cause the temperature of the underground rock and soil to gradually decrease, affecting the efficiency of the heat pump unit until the heat pump cannot operate. In the transitional season power generation mode, the power generation efficiency of the fuel cell system and the hydrogen internal combustion engine system is 40%-50%, of which more than 40% of the energy is wasted in the form of heat energy through heat dissipation. Therefore, the ground source heat pump heating and cooling technology has the problem of unbalanced heat extraction / heat release from the underground rock and soil in winter / summer. Summary of the invention

[0005] In view of the above-mentioned problems, the object of the present invention is to provide a system and method for comprehensive utilization of electricity, cooling and heat based on hydrogen energy.

[0006] The technical solution of the present invention is: a comprehensive utilization system of electricity, cold and heat multi-generation based on hydrogen energy, which is used to provide heat or cold to the load side, the load side includes a heat system and a cold system, the heat system uses a first circulating medium as a working medium, and the cold system uses a second circulating medium as a working medium; including: Hydrogen fuel cell systems for power generation; A heat exchanger, wherein the heat medium inlet and the heat medium outlet are respectively connected to the cooling pipe network of the hydrogen fuel cell system, and the cold medium inlet and the cold medium outlet are respectively connected to the medium circulation pipe network of the heat system, and the cooling water in the cooling pipe network exchanges heat with the first circulation medium in the heat exchanger; Hydrogen internal combustion engines for power generation; The flue gas hot water type lithium bromide unit has a flue gas inlet and a flue gas outlet respectively connected to the flue gas network of the hydrogen internal combustion engine, a hot water inlet and a hot water outlet respectively connected to the cylinder jacket water network of the hydrogen internal combustion engine, and a cooling water inlet and a cooling water outlet respectively connected to the medium circulation network of the heat system. The high-temperature flue gas in the flue gas network and the cylinder jacket water in the cylinder jacket water network exchange heat with the first circulation medium in the flue gas hot water type lithium bromide unit; the refrigerant water inlet and the refrigerant water outlet of the flue gas hot water type lithium bromide unit are connected to the medium circulation network of the cold system, and the second circulation medium is cooled in the flue gas hot water type lithium bromide unit; The geothermal heat pump system comprises a geothermal heat pump unit, wherein the evaporator inlet and the evaporator outlet of the geothermal heat pump unit are respectively connected to the geothermal heat pump rock and soil side through a pipe network, the condenser inlet and the condenser outlet are respectively connected to the medium circulation pipe network of the heat system, and the low-temperature circulating water on the geothermal heat pump rock and soil side exchanges heat with the first circulation medium in the geothermal heat pump unit.

[0007] Furthermore, the evaporator inlet and evaporator outlet of the geothermal heat pump unit are also connected to the cold medium inlet and cold medium outlet of the heat exchanger, and the condenser inlet and condenser outlet of the geothermal heat pump unit are respectively used to connect to the geothermal heat pump rock and soil side through the pipeline network, and the low-temperature circulating water on the geothermal heat pump rock and soil side and the cooling water in the cooling pipeline network of the hydrogen fuel cell system are heat exchanged through the geothermal heat pump unit and the heat exchanger.

[0008] Furthermore, the evaporator inlet and evaporator outlet of the geothermal heat pump unit are also connected to the cooling water inlet and cooling water outlet of the flue gas hot water type lithium bromide unit, and the low-temperature circulating water on the geotechnical side of the geothermal heat pump exchanges heat with the high-temperature flue gas in the flue gas pipeline network of the hydrogen internal combustion engine and the cylinder jacket water in the cylinder jacket water pipeline network of the hydrogen internal combustion engine through the geothermal heat pump unit and the flue gas hot water type lithium bromide unit.

[0009] Furthermore, the medium circulation pipeline network of the cooling system is also connected to the rock and soil side of the ground source heat pump, and the low-temperature circulating water on the rock and soil side of the ground source heat pump is used as a cold source for the cooling system.

[0010] Furthermore, the ground source heat pump system further includes a pump group, and the pump group includes: The ground source heat pump side circulating water pump is arranged on the pipe network connected to the ground source heat pump unit on the ground source heat pump rock and soil side, and is used to pump out the low-temperature circulating water in the ground source heat pump rock and soil side; The heating / cooling circulating water pump is arranged at the inlet end of the circulating medium on the load side and is used to supply pressure to the water source entering the load side.

[0011] Furthermore, a cooling tower group is also included, and the cooling tower group includes: The first cooling tower is connected to the flue gas pipe network and the cylinder jacket water pipe network of the hydrogen internal combustion engine, and is used to cool the high-temperature flue gas and the cylinder jacket water. After the cylinder jacket water is cooled, the first cooling water is obtained. The first cooling tower is also connected to the medium circulation pipe network of the cooling system. The first cooling water is used as a cold source to supply cooling to the cooling system. The second cooling tower is connected to the cooling network of the hydrogen fuel cell system and is used to cool the cooling water with low-temperature waste heat. The cooling water with low-temperature waste heat is cooled to obtain the second cooling water. The second cooling tower is also connected to the medium circulation network of the cooling system. The second cooling water serves as a cold source to supply cooling to the cooling system.

[0012] A method for comprehensive utilization of electricity, cooling and heat multi-generation based on hydrogen energy, using an electricity, cooling and heat multi-generation comprehensive utilization system for heating or cooling, specifically comprising: During the heating season, the cooling water generated by the hydrogen fuel cell system is used to heat the thermal system through a heat exchanger; the high-temperature flue gas and jacket water generated by the hydrogen internal combustion engine are used to heat the thermal system through a flue gas hot water type lithium bromide unit; during the heating peak or when the hydrogen fuel cell system and hydrogen internal combustion engine stop running, the ground source heat pump unit uses the low-temperature circulating water in the rock and soil side of the ground source heat pump to heat the thermal system; During the cooling season, the cooling system is supplied with cooling by a flue gas hot water type lithium bromide unit.

[0013] Compared with the prior art, the present invention has the following beneficial effects: The present invention makes full use of hydrogen energy, utilizes the waste heat generated by hydrogen fuel cells and hydrogen internal combustion engines for heating and cooling, and realizes the cascade utilization of hydrogen energy, wherein the waste heat of cooling water of the hydrogen fuel cell is used for heating or cooling after passing through a heat exchanger, and the waste heat of high-temperature flue gas and cylinder jacket water of the hydrogen internal combustion engine is used for heating or cooling after passing through a lithium bromide unit.

[0014] By utilizing hydrogen fuel cells, hydrogen internal combustion engines and ground-source heat pump coupling systems, the application scenarios of hydrogen energy in civil construction have been expanded, providing an integrated solution for the combined supply of electricity, cooling and heat based on hydrogen energy.

[0015] Moreover, compared with the conventional separate heating / cooling system of the ground source heat pump system, the present invention can also inject the waste heat generated by the hydrogen fuel cell system and the hydrogen internal combustion engine system into the underground rock and soil after heat exchange during the transition season, thereby ensuring the heat and cold balance of the underground rock and soil and realizing cross-season energy storage and efficient and sustainable operation of the ground source heat pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention; Among them, 1-hydrogen fuel cell system, 2-heat exchanger, 3-hydrogen internal combustion engine, 4-flue gas hot water type lithium bromide unit, 5-ground source heat pump system, 51-ground source heat pump geotechnical side, 52-ground source heat pump unit, 6-pump group, 61-ground source heat pump side circulating water pump, 62-heating / cooling circulating water pump, 7-cooling tower group, 71-first cooling tower, 72-second cooling tower, 801-first valve, 802-second valve, 803-third valve, 804-fourth valve, 805-fifth valve, 806-fourth valve, 807-fifth valve, 808-fifth valve, 809-fifth valve, 810-fifth valve, 811-fifth valve, 812-fifth valve, 813-fifth valve, 814-fifth valve, 815-fifth valve, 816-fifth valve, 817-fifth valve, 818-fifth valve, 819-fifth valve, 820-fifth valve, 821-fifth valve, 822-fifth valve, 823-fifth valve, 824-fifth valve, 825-fifth valve, 826-fifth valve, 827-fifth valve, 828-fifth valve, 829-fifth valve, 830-fifth valve, 831-fifth valve, 832-fifth valve, 833-fifth valve, 834-fifth valve, 835-fifth valve, 836-fifth valve, 837-fifth valve, 838-fifth valve, 839-f 06-sixth valve, 807-seventh valve, 808-eighth valve, 809-ninth valve, 810-tenth valve, 811-eleventh valve, 812-twelfth valve, 813-thirteenth valve, 814-fourteenth valve, 815-fifteenth valve, 816-sixteenth valve, 817-seventeenth valve, 818-eighteenth valve, 819-nineteenth valve, 820-twentieth valve, 821-twenty-first valve, 822-twenty-second valve, 9-load side. DETAILED DESCRIPTION

[0017] The following is combined with Figure 1 , the specific implementation methods of the present invention are described in detail. In the description of the present invention, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0018] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features; in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0019] It should be noted that the circuit connections involved in the present invention all adopt conventional circuit connection methods and do not involve any innovation.

[0020] Example like Figure 1 The illustrated comprehensive utilization system of electricity, cooling and heat multi-generation based on hydrogen energy is used to provide heating or cooling to the load side 9. The load side 9 includes a heat system and a cooling system. The heat system uses a first circulating medium as a working fluid, and the cooling system uses a second circulating medium as a working fluid.

[0021] The electricity, cooling and heat combined supply and utilization system comprises a hydrogen fuel cell system 1, a heat exchanger 2, a hydrogen internal combustion engine 3, a flue gas hot water type lithium bromide unit 4 and a ground source heat pump system 5.

[0022] The hydrogen fuel cell system 1 is used for power generation. The hot medium inlet and the hot medium outlet of the heat exchanger 2 are respectively connected to the cooling network of the hydrogen fuel cell system 1, and the cold medium inlet and the cold medium outlet are respectively connected to the medium circulation network of the heat system. The cooling water in the cooling network exchanges heat with the first circulating medium in the heat exchanger 2.

[0023] The hydrogen internal combustion engine 3 is used for power generation, the flue gas inlet and the flue gas outlet of the flue gas hot water type lithium bromide unit 4 are respectively connected to the flue gas network of the hydrogen internal combustion engine 3, the hot water inlet and the hot water outlet are respectively connected to the cylinder jacket water network of the hydrogen internal combustion engine 3, the cooling water inlet and the cooling water outlet are respectively connected to the medium circulation network of the heat system, the high-temperature flue gas in the flue gas network and the cylinder jacket water in the cylinder jacket water network exchange heat with the first circulation medium in the flue gas hot water type lithium bromide unit 4; the refrigerant water inlet and the refrigerant water outlet of the flue gas hot water type lithium bromide unit 4 are connected to the medium circulation network of the cold system, and the second circulation medium is cooled in the flue gas hot water type lithium bromide unit 4.

[0024] The geothermal heat pump system 5 includes a geothermal heat pump unit 52. The evaporator inlet and the evaporator outlet of the geothermal heat pump unit 52 are respectively used to connect with the geothermal heat pump rock and soil side 51 through a pipeline network, and the condenser inlet and the condenser outlet are respectively connected with the medium circulation pipeline network of the heat system. The low-temperature circulating water of the geothermal heat pump rock and soil side 51 exchanges heat with the first circulating medium in the geothermal heat pump unit 52.

[0025] Preferably, the evaporator inlet and evaporator outlet of the geothermal heat pump unit 52 are also connected to the cold medium inlet and cold medium outlet of the heat exchanger 2, and the condenser inlet and condenser outlet of the geothermal heat pump unit 52 are respectively used to connect to the geothermal heat pump rock and soil side 51 through a pipeline network, and the low-temperature circulating water on the geothermal heat pump rock and soil side 51 and the cooling water in the cooling pipeline network of the hydrogen fuel cell system 1 are heat exchanged through the geothermal heat pump unit 52 and the heat exchanger 2.

[0026] Among them, the cooling water in the cooling pipeline of the hydrogen fuel cell system 1 first exchanges heat with the circulating medium in the evaporator of the geothermal heat pump unit 52 in the heat exchanger 2, and the cooling water with waste heat exchanges heat to the circulating medium in the evaporator of the geothermal heat pump unit 52, and then the low-temperature circulating water on the geothermal heat pump rock and soil side 51 exchanges heat with the circulating medium in the evaporator after heat exchange in the geothermal heat pump unit 52, and then re-enters the geothermal heat pump rock and soil side 51.

[0027] Preferably, the evaporator inlet and evaporator outlet of the geothermal heat pump unit 52 are also connected to the cooling water inlet and cooling water outlet of the flue gas hot water type lithium bromide unit 4, and the low-temperature circulating water on the geothermal heat pump geotechnical side 51 exchanges heat with the high-temperature flue gas in the flue gas pipe network of the hydrogen internal combustion engine 3 and the cylinder jacket water in the cylinder jacket water pipe network of the hydrogen internal combustion engine 3 through the geothermal heat pump unit 52 and the flue gas hot water type lithium bromide unit 4. Among them, the high-temperature flue gas in the flue gas pipe network of the hydrogen internal combustion engine 3 and the cylinder jacket water in the cylinder jacket water pipe network of the hydrogen internal combustion engine 3 are first heat exchanged with the circulating medium in the evaporator of the geothermal heat pump unit 52 in the flue gas hot water type lithium bromide unit 4, and the cooling water with residual heat exchanges heat to the circulating medium in the evaporator of the geothermal heat pump unit 52, and then the low-temperature circulating water on the geothermal heat pump geotechnical side 51 exchanges heat with the circulating medium in the evaporator after heat exchange in the geothermal heat pump unit 52, and then re-enters the geothermal heat pump geotechnical side 51.

[0028] Preferably, the medium circulation pipe network of the cooling system is also connected to the geothermal side 51 of the geothermal heat pump, and the low-temperature circulating water of the geothermal side 51 of the geothermal heat pump is used as the cooling source of the cooling system.

[0029] Preferably, the geothermal heat pump system 5 further includes a pump group 6 , which includes a geothermal heat pump side circulating water pump 61 and a heating / cooling circulating water pump 62 .

[0030] The geothermal heat pump side circulating water pump 61 is arranged on the pipeline connecting the geothermal heat pump geotechnical side 51 and the geothermal heat pump unit 52, and is used to pump out the low-temperature circulating water in the geothermal heat pump geotechnical side 51. The heating / cooling circulating water pump 62 is arranged at the inlet end of the circulating medium on the load side 9, and is used to supply pressure to the water source entering the load side 9.

[0031] Preferably, a cooling tower group 7 is also included, and the cooling tower group 7 includes a first cooling tower 71 and a second cooling tower 72. The first cooling tower 71 is connected to the flue gas pipe network and the cylinder jacket water pipe network of the hydrogen internal combustion engine 3, and is used to cool the high-temperature flue gas and the cylinder jacket water. After the cylinder jacket water is cooled, the first cooling water is obtained. The first cooling tower 71 is also connected to the medium circulation pipe network of the cold system, and the first cooling water is used as a cold source to supply cooling to the cold system. The second cooling tower 72 is connected to the cooling pipe network of the hydrogen fuel cell system 1, and is used to cool the cooling water with low-temperature waste heat. After the cooling water with low-temperature waste heat is cooled, the second cooling water is obtained. The second cooling tower 72 is also connected to the medium circulation pipe network of the cold system, and the second cooling water is used as a cold source to supply cooling to the cold system.

[0032] It should be noted that: because heating and cooling are performed only, that is, heating is performed only without cooling during heating, and cooling is performed only without heating during cooling. Therefore, the heat system and the cooling system use a set of medium circulation pipe network, and the first circulation medium and the second circulation medium are the same substance. That is, the load side 9 has a set of medium circulation pipe network, and there is a circulating medium inside, which is regarded as a heat system during the heating period and as a cooling system during the cooling period.

[0033] In addition, the ground source heat pump unit 52 is mainly composed of key components such as a compressor, an evaporator, a condenser and an expansion valve. The compressor plays the role of compressing and transporting the circulating working fluid from a low temperature and low pressure to a high temperature and high pressure, and is the heart of the ground source heat pump unit 52; the evaporator is a device for outputting cold capacity, and its function is to evaporate the refrigerant liquid flowing in through the throttle valve to absorb the heat of the cooled object to achieve the purpose of refrigeration; the condenser is a device for outputting heat, and the heat absorbed from the evaporator and the heat converted by the compressor's power consumption are taken away by the cooling medium in the condenser to achieve the purpose of heating; the expansion valve or throttle valve plays a throttling and pressure reduction role on the circulating working fluid, and adjusts the flow of the circulating working fluid entering the evaporator.

[0034] A method for comprehensive utilization of electricity, cooling and heat combined supply based on hydrogen energy, using the electricity, cooling and heat combined supply comprehensive utilization system proposed in this embodiment for heating or cooling, specifically comprising: During the heating season, the cooling water generated by the hydrogen fuel cell system 1 is used to supply heat to the load side 9 through the heat exchanger 2; the high-temperature flue gas and cylinder jacket water generated by the hydrogen internal combustion engine 3 are used to supply heat to the load side 9 through the flue gas hot water type lithium bromide unit 4; when the heating is at its peak or when the hydrogen fuel cell system 1 and the hydrogen internal combustion engine 3 stop running, the ground source heat pump unit 52 uses the low-temperature circulating water in the rock and soil side 51 of the ground source heat pump to supply heat to the load side 9.

[0035] In the cooling season, the high-temperature flue gas and jacket water generated by the hydrogen internal combustion engine 3 are used to generate low-temperature cold water through the flue gas hot water type lithium bromide unit 4 to provide cooling to the load side 9; the ground source heat pump unit 52 uses the low-temperature circulating water in the ground source heat pump rock side 51 to provide cooling to the load side 9. The first cooling tower 71 and the second cooling tower 72 can also be used to provide cooling to the load side 9 respectively.

[0036] During the transition season, the cooling water generated by the hydrogen fuel cell system 1 transfers heat to the ground source heat pump unit 52 through the heat exchanger 2, and the high-temperature flue gas and cylinder jacket water generated by the hydrogen internal combustion engine 3 transfer heat to the ground source heat pump unit 52 through the flue gas hot water type lithium bromide unit 4.

[0037] Preferably, in the cooling season, the high-temperature flue gas and jacket water generated by the hydrogen internal combustion engine 3 are used to generate low-temperature cold water through the flue gas hot water type lithium bromide unit 4 to provide cooling to the load side 9; The low-temperature circulating water on the geotechnical side 51 of the geothermal heat pump exchanges heat with the circulating water in the pipe network on the load side 9 in the geothermal heat pump unit 52, absorbs heat from the circulating water in the pipe network on the load side 9 to provide cooling to the load side 9; the low-temperature circulating water after absorbing heat in the geothermal heat pump unit 52 re-injects heat into the geotechnical side 51 of the geothermal heat pump.

[0038] like Figure 1As shown, the low-temperature circulating water outlet end of the buried pipe system 51 on the rock and soil side of the geothermal heat pump is connected to the evaporator side of the geothermal heat pump unit 52 through the first valve 801. After heat release in the evaporator, the return water is recharged to the low-temperature circulating water inlet end of the buried pipe system 51 on the rock and soil side of the geothermal heat pump through the second valve 802 and the circulating water pump 61 on the geothermal heat pump side.

[0039] After absorbing heat on the condenser side of the geothermal heat pump unit 52, the heating medium is connected to the load side 9 through the eighth valve 808 and the twenty-second valve 822. After cooling, it returns to the condenser through the circulating water pump 62, the thirteenth valve 813, and the seventh valve 807, or is connected to the circulating water pump 61 on the geothermal heat pump side through the fifth valve 805 and re-injected into the low-temperature circulating water inlet end of the buried pipe system 51 on the rock and soil side of the geothermal heat pump.

[0040] The hot water generated by the hydrogen fuel cell 1 is connected to the heat exchanger 2 through the tenth valve 810, and the return water returns to the hydrogen fuel cell 1 through the ninth valve 809. The heat exchanged heats the circulating medium and is connected to the load side 9 through the fourteenth valve 814 and the twenty-second valve 822 for heat supply. The hot water is connected to the second cooling tower 72 through the twelfth valve 812 for heat dissipation, and the cooling water is connected to the heat exchanger 2 through the eleventh valve 811 and the ninth valve 809, and the heat exchanger is used to transfer cold to the load side 9 for cooling.

[0041] The hydrogen internal combustion engine 3 is connected to the flue gas hot water type lithium bromide unit 4 through the sixteenth valve 816, the nineteenth valve 819, and the twentieth valve 820. The high-temperature flue gas and the jacket water generated during the power generation process of the hydrogen internal combustion engine 3 are passed through the flue gas hot water type lithium bromide unit 4 to generate high-temperature hot water to heat the load side 9 through the connecting pipe. Or it is connected to the first cooling tower 71 through the seventeenth valve 817, and the cooling water is passed through the flue gas hot water type lithium bromide unit 4 to generate low-temperature cold water to cool the load side 9 through the connecting pipe. If necessary, the excess flue gas can be discharged through the fifteenth valve 815.

[0042] It should be noted that the first valve 801, the second valve 802, the third valve 803, the fourth valve 804, the fifth valve 805, the sixth valve 806, the seventh valve 807, the eighth valve 808, the ninth valve 809, the tenth valve 810, the eleventh valve 811, the twelfth valve 812, the thirteenth valve 813, the fourteenth valve 814, the fifteenth valve 815, the sixteenth valve 816, the seventeenth valve 817, the eighteenth valve 818, the nineteenth valve 819, the twentieth valve 820, the twenty-first valve 821, and the twenty-second valve 822 are all respectively arranged on the pipelines, and the pipeline connection is a conventional technical means, so it is not described in detail.

[0043] The specific models of the above electronic components are not specially specified, and ordinary products available on the market can be selected as long as they can meet the use requirements of the present invention.

[0044] The specific embodiments described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and does not limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention are included in the protection scope of the present invention.

Claims

1. A hydrogen-based electricity, cooling and heat cogeneration comprehensive utilization system, used for supplying heat or cooling to a load side (9), the load side (9) comprising a heat system and a cooling system, the heat system using a first circulating medium as a working fluid, and the cooling system using a second circulating medium as a working fluid; characterized in that: include: A hydrogen fuel cell system (1) for generating electricity; The heat exchanger (2) has a heat medium inlet and a heat medium outlet respectively connected to the cooling pipe network of the hydrogen fuel cell system (1), and a cold medium inlet and a cold medium outlet respectively connected to the medium circulation pipe network of the heat system, and the cooling water in the cooling pipe network exchanges heat with the first circulation medium in the heat exchanger (2); Hydrogen internal combustion engines (3) for power generation; A flue gas hot water type lithium bromide unit (4), wherein the flue gas inlet and the flue gas outlet are respectively connected to the flue gas pipe network of the hydrogen internal combustion engine (3), the hot water inlet and the hot water outlet are respectively connected to the cylinder jacket water pipe network of the hydrogen internal combustion engine (3), the cooling water inlet and the cooling water outlet are respectively connected to the medium circulation pipe network of the heat system, and the high-temperature flue gas in the flue gas pipe network and the cylinder jacket water in the cylinder jacket water pipe network exchange heat with the first circulation medium in the flue gas hot water type lithium bromide unit (4); the refrigerant water inlet and the refrigerant water outlet of the flue gas hot water type lithium bromide unit (4) are connected to the medium circulation pipe network of the cold system, and the second circulation medium is cooled in the flue gas hot water type lithium bromide unit (4); A geothermal heat pump system (5) comprises a geothermal heat pump unit (52); an evaporator inlet and an evaporator outlet of the geothermal heat pump unit (52) are respectively used to communicate with the geothermal heat pump rock and soil side (51) through a pipe network; a condenser inlet and a condenser outlet are respectively connected to a medium circulation pipe network of a heat system; low-temperature circulating water on the geothermal heat pump rock and soil side (51) exchanges heat with a first circulating medium in the geothermal heat pump unit (52).

2. The hydrogen-based electricity, cooling and heat combined supply and utilization system according to claim 1, characterized in that: The evaporator inlet and evaporator outlet of the geothermal heat pump unit (52) are also connected to the cold medium inlet and cold medium outlet of the heat exchanger (2); the condenser inlet and condenser outlet of the geothermal heat pump unit (52) are respectively used to be connected to the geothermal heat pump rock and soil side (51) through a pipe network; the low-temperature circulating water on the geothermal heat pump rock and soil side (51) and the cooling water in the cooling pipe network of the hydrogen fuel cell system (1) are heat exchanged through the geothermal heat pump unit (52) and the heat exchanger (2).

3. The hydrogen-based electricity, cooling and heat combined supply and utilization system as claimed in claim 2, characterized in that: The evaporator inlet and evaporator outlet of the ground source heat pump unit (52) are also connected to the cooling water inlet and cooling water outlet of the flue gas hot water type lithium bromide unit (4), and the low-temperature circulating water on the geotechnical side (51) of the ground source heat pump exchanges heat with the high-temperature flue gas in the flue gas pipe network of the hydrogen internal combustion engine (3) and the cylinder jacket water in the cylinder jacket water pipe network of the hydrogen internal combustion engine (3) through the ground source heat pump unit (52) and the flue gas hot water type lithium bromide unit (4).

4. The hydrogen-based electricity, cooling and heat combined supply and utilization system according to claim 1, characterized in that: The medium circulation pipe network of the cooling system is also connected to the rock and soil side (51) of the ground source heat pump, and the low-temperature circulating water on the rock and soil side (51) of the ground source heat pump is used as a cold source for the cooling system.

5. The hydrogen-based electricity, cooling and heat combined supply and utilization system as claimed in claim 4, characterized in that: The ground source heat pump system (5) further comprises a pump group (6), wherein the pump group (6) comprises: A geothermal heat pump side circulating water pump (61), arranged on a pipe network connecting the geothermal heat pump rock and soil side (51) and the geothermal heat pump unit (52), and used for pumping out low-temperature circulating water in the geothermal heat pump rock and soil side (51); The heating / cooling circulating water pump (62) is arranged at the inlet end of the circulating medium on the load side (9) and is used to supply pressure to the water source entering the load side (9).

6. The hydrogen-based electricity, cooling and heat combined supply and utilization system according to claim 1, characterized in that: It also includes a cooling tower group (7), the cooling tower group (7) includes: A first cooling tower (71) is connected to the flue gas pipe network and the cylinder jacket water pipe network of the hydrogen internal combustion engine (3) and is used to cool the high-temperature flue gas and the cylinder jacket water. After the cylinder jacket water is cooled, first cooling water is obtained. The first cooling tower (71) is also connected to the medium circulation pipe network of the cooling system. The first cooling water is used as a cooling source to supply cooling to the cooling system. The second cooling tower (72) is connected to the cooling pipe network of the hydrogen fuel cell system (1) and is used to cool the cooling water with low-temperature waste heat. The cooling water with low-temperature waste heat is cooled to obtain second cooling water. The second cooling tower (72) is also connected to the medium circulation pipe network of the cooling system. The second cooling water serves as a cold source to supply cooling to the cooling system.

7. A method for comprehensive utilization of electricity, cooling and heat based on hydrogen energy, characterized in that: Heating or cooling is performed using the electricity, cooling and heat combined power generation system as described in any one of claims 1 to 6, specifically comprising: During the heating season, cooling water generated by the hydrogen fuel cell system (1) is used to supply heat to the heat system through the heat exchanger (2); high-temperature flue gas and cylinder jacket water generated by the hydrogen internal combustion engine (3) are used to supply heat to the heat system through the flue gas hot water type lithium bromide unit (4); during the heating peak or when the hydrogen fuel cell system (1) and the hydrogen internal combustion engine (3) stop running, the ground source heat pump unit (52) uses the low-temperature circulating water in the rock and soil side (51) of the ground source heat pump to supply heat to the heat system; During the cooling season, the flue gas hot water type lithium bromide unit (4) is used to supply cooling to the cooling system.

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