CN114046615A - Hydrogen fuel cell and heat pump interconnection system - Google Patents
Hydrogen fuel cell and heat pump interconnection system Download PDFInfo
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B30/00—Heat pumps
- F25B30/06—Heat pumps characterised by the source of low potential heat
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H4/00—Fluid heaters characterised by the use of heat pumps
- F24H4/02—Water heaters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
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Abstract
A hydrogen fuel cell and heat pump interconnection system belongs to the technical field of heat pump systems and control algorithms. The system comprises a first heat exchange device, a second heat exchange device, a third heat exchange device, a hydrogen fuel cell system, a heat pump system, a control algorithm A and a control algorithm B. The invention fully utilizes the electric energy and the heat energy generated by the hydrogen fuel cell, the heat energy is directly used for heating industrial water, the electric energy drives the heat pump to recover the heat in the waste water heat source, and the heat pump is indirectly used for heating the industrial water, thereby realizing the aim of no carbon emission and slightly higher economic benefit than the traditional natural gas, and improving the comprehensive energy utilization efficiency of the whole system; according to the invention, the first heat exchange device, the second heat exchange device and the third heat exchange device are matched to realize a three-stage preheating scheme, the temperature rising interval of the industrial water is reasonably arranged, the temperature is raised step by step, and the comprehensive heat exchange efficiency is improved to the maximum extent.
Description
Technical Field
The invention belongs to the technical field of heat pump systems and control algorithms, and particularly relates to a hydrogen fuel cell and heat pump interconnection system.
Background
Industrial waste water often has a large amount of heat energy, and if the industrial waste water is directly discharged outside without being recycled, energy waste is caused. The heat pump technology is a high-efficiency source conversion device which absorbs heat from a surrounding low-temperature heat source at the cost of less electric energy and generates multiple times of heat energy return benefits, and a large amount of waste water heat sources are used as heat pump heat sources, so that the comprehensive energy utilization efficiency of the whole system is improved; in addition, the 'clean and environment-friendly' hydrogen-generating electric energy is used for driving the heat pump to work, so that the carbon emission of the system is reduced, and the national 'carbon neutralization' target call is responded. The hydrogen fuel cell is a device for converting chemical energy in fuel (hydrogen) and oxidant (oxygen) into electric energy and heat energy through electrochemical reaction, has no carbon emission, not only provides all or part of required electric energy for a heat pump system, but also can further heat industrial water (the suitable working temperature of the fuel cell is equivalent to the target temperature of the industrial water), and increases the temperature of the industrial water when the industrial water enters the inlet end of the heat pump system.
Patent document 1 (CN 211739549U) discloses a hydrogen energy driven compression heat pump system, which includes a hydrogen fuel cell, a heat pump, and the like, and uses hydrogen energy as the only energy supply of the system, and heats a heat source to be heated by the heat pump, thereby saving energy and protecting environment.
Patent document 2 (CN 111442441A) discloses a heat pump heat supply and refrigeration integrated system and method using hydrogen energy and natural energy, which includes an air source heat pump, a hydrogen energy burner, an external solar evaporator, etc., and effectively uses solar energy to increase the temperature of a refrigerant, improve the performance of a heat pump system in a low temperature environment, and increase the comprehensive utilization efficiency of energy.
Patent document 3 (CN 212486131U) discloses a comprehensive energy system based on hydrogen energy medium, which includes a power grid, a wind generating set, a photovoltaic power generation heat collection subsystem, an electricity-hydrogen conversion energy storage subsystem, a heat pump, etc., and uses hydrogen energy as medium to connect various energy sources, so as to realize multi-energy complementation, optimize comprehensive energy configuration, and have small pollution and low cost.
Therefore, a new solution is needed to solve the above problems.
Disclosure of Invention
The invention mainly solves the technical problems in the prior art and provides a hydrogen fuel cell and heat pump interconnection system.
The technical problem of the invention is mainly solved by the following technical scheme: a hydrogen fuel cell and heat pump interconnection system comprises a first heat exchange device, a second heat exchange device, a third heat exchange device, a hydrogen fuel cell system, a heat pump system, a control algorithm A and a control algorithm B, wherein the first heat exchange device is used for heating industrial water for the first time by using heat of the industrial wastewater, the second heat exchange device is connected with the hydrogen fuel cell system, the second heat exchange device is used for heating the industrial water for the second time by using heat energy generated by the hydrogen fuel cell system, the third heat exchange device is connected with the heat pump system, the heat pump system is used for recovering heat energy of the industrial wastewater by using electric energy generated by the hydrogen fuel cell system, and the industrial water is heated to a target temperature by the third heat exchange device; the control algorithm A is used for adjusting the industrial wastewater flow according to the industrial water flow, the industrial water temperature and the industrial wastewater temperature; and the control algorithm B is used for adjusting the load current of the hydrogen fuel cell system and the extra required power from the power grid according to the industrial wastewater flow, the temperature of the industrial water at the inlet end of the hydrogen fuel cell system and the target temperature of the industrial water at the outlet end of the hydrogen fuel cell system so as to ensure the electric energy requirement of the heat pump system and ensure that the temperature of the industrial water at the outlet end of the third heat exchange device reaches the target temperature.
Preferably, the first heat exchange device and the third heat exchange device are arranged in series or in parallel along the industrial wastewater transmission direction, and the first heat exchange device, the second heat exchange device and the third heat exchange device are sequentially arranged along the industrial wastewater transmission direction.
Preferably, the system also comprises a first water pump, a first temperature sensor, a first flow sensor, a first three-way valve, a second three-way valve, a third three-way valve, a second water pump, a second temperature sensor, a second flow sensor, a third temperature sensor, a fourth temperature sensor, a fifth temperature sensor, a water storage tank, a third water pump and an electronic thermostat, the first water pump is connected with the left port of the first three-way valve through a first temperature sensor and a first flow sensor, the right port of the first three-way valve is connected with one input end of the first heat exchange device, one output end of the first heat exchange device is connected with the left port of the third three-way valve through the second three-way valve, the upper port of the first three-way valve is connected with the upper port of a third three-way valve, and the right port of the third three-way valve is connected with one input end of a third heat exchange device; the second water pump is connected with the other input end of the first heat exchange device through a second temperature sensor and a second flow sensor, the other output end of the first heat exchange device is connected with the other input end of the second heat exchange device through a third temperature sensor, the other output end of the second heat exchange device is connected with the other input end of the third heat exchange device through a fourth temperature sensor, and the other output end of the third heat exchange device is connected with the water storage tank through a fifth temperature sensor; the outlet end of the hydrogen fuel cell system is connected with the lower port of the electronic thermostat through a third water pump, the upper port of the electronic thermostat is connected with the input end of the other path of the second heat exchange device, the inlet end of the hydrogen fuel cell system is connected with the right port of the electronic thermostat and the output end of the other path of the second heat exchange device, and the hydrogen fuel cell system is connected with the fuel cell controller.
Preferably, in the control algorithm a, the flow rate of the industrial water at the second flow sensor, the temperature of the industrial water at the second temperature sensor, and the temperature of the industrial wastewater at the first temperature sensor are input quantities, the flow rate of the industrial wastewater at the first flow sensor is an output quantity, the first water pump is a controlled object, and the first water pump adjusts the rotation speed according to the flow rate of the industrial wastewater.
Preferably, in the control algorithm B, the temperature of the industrial water at the third temperature sensor, the flow rate of the industrial water at the second flow rate sensor, the optimization index, the hydrogen gas price, and the electricity price are input amounts, and the current load is an output amount, for the hydrogen fuel cell system.
Preferably, in the control algorithm B, for the heat pump system, the temperature of the industrial water at the fourth temperature sensor, the flow rate of the industrial water at the second flow sensor are disturbance amounts, the current load is an input amount, and the temperature of the industrial water at the fifth temperature sensor is a controlled amount.
The invention has the following beneficial effects:
(1) according to the invention, a large amount of industrial wastewater is used as a heat source, the industrial wastewater use scheme is reasonable in design, and the energy use efficiency can be maximized;
(2) the invention fully utilizes the electric energy and the heat energy generated by the hydrogen fuel cell, the electric energy drives the heat pump to recover the heat energy in the waste water heat source, the heat energy is used for heating industrial water, the economic benefit target of no carbon emission and slightly higher than the traditional natural gas is realized, the comprehensive energy utilization efficiency of the whole system is improved, and the problem of limited grid-connected proportion of the hydrogen-generated electricity can be solved under the scene;
(3) according to the invention, the first heat exchange device, the second heat exchange device and the third heat exchange device are matched to realize a three-stage preheating scheme, the temperature rising interval of the industrial water is reasonably arranged, the temperature rises step by step, and the comprehensive heat exchange efficiency is improved to the maximum extent;
(4) the invention adjusts the industrial wastewater flow, the fuel cell load current and the power interaction with the power grid through the control algorithm A and the control algorithm B, and realizes that the temperature of the industrial water outlet reaches the target temperature on the basis of ensuring that the temperature of the hydrogen fuel cell stack is in the optimal working range.
Drawings
FIG. 1 is a schematic diagram of an embodiment of the present invention;
FIG. 2 is a schematic diagram of the control algorithm A of the present invention;
FIG. 3 is a schematic diagram of the control algorithm B of the present invention for a hydrogen fuel cell system;
fig. 4 is a schematic diagram of the control algorithm B of the present invention for a heat pump system.
In the figure: 1. a first heat exchange means; 2. a second heat exchange means; 3. a third heat exchange means; 4. a hydrogen fuel cell system; 5. a heat pump system; 6. a first water pump; 7. a first temperature sensor; 8. a first flow sensor; 9. a first three-way valve; 10. a second three-way valve; 11. a third three-way valve; 12. a second water pump; 13. a second temperature sensor; 14. a second flow sensor; 15. a third temperature sensor; 16. a fourth temperature sensor; 17. a fifth temperature sensor; 18. a water storage tank; 19. a third water pump; 20. an electronic thermostat; 21. a waste water storage tank; 22. a fuel cell controller.
Detailed Description
The technical scheme of the invention is further specifically described by the following embodiments and the accompanying drawings.
Example (b): a hydrogen fuel cell and heat pump interconnection system is shown in figure 1 and comprises a first heat exchange device 1, a second heat exchange device 2, a third heat exchange device 3, a hydrogen fuel cell system 4, a heat pump system 5, a control algorithm A and a control algorithm B, wherein the first heat exchange device 1 is a liquid-liquid plate type heat exchanger and is used for carrying out heat exchange on cold and hot fluids, the first heat exchange device 1 is used for carrying out primary heating on low-temperature industrial water by utilizing heat of high-temperature industrial wastewater, the second heat exchange device 2 is connected with the hydrogen fuel cell system 4, the second heat exchange device 2 is a liquid-liquid plate type heat exchanger, the second heat exchange device 2 is used for carrying out secondary heating on the industrial water by utilizing heat energy generated by the hydrogen fuel cell system 4, the third heat exchange device 3 is connected with a heat pump system 5, the third heat exchange device 3 is a liquid-liquid plate type heat exchanger, the heat pump system 5 is used for recovering heat energy of the industrial wastewater by utilizing electric energy generated by the hydrogen fuel cell system 4, and the industrial water is heated to the target temperature through the third heat exchange device 3; the control algorithm A is used for adjusting the industrial wastewater flow according to the industrial water flow, the industrial water temperature and the industrial wastewater temperature; the control algorithm B is used for adjusting the load current of the hydrogen fuel cell system 4 and the extra required power from the power grid according to the industrial wastewater flow, the temperature of the industrial water at the inlet end of the hydrogen fuel cell system 4, and the target temperature of the industrial water at the outlet end of the hydrogen fuel cell system 4, so as to ensure the electric energy demand of the heat pump system 5, and make the temperature of the industrial water at the outlet end of the third heat exchanging device 3 reach the target temperature.
The interconnection system further comprises a first water pump 6, a first temperature sensor 7, a first flow sensor 8, a first three-way valve 9, a second three-way valve 10, a third three-way valve 11, a second water pump 12, a second temperature sensor 13, a second flow sensor 14, a third temperature sensor 15, a fourth temperature sensor 16, a fifth temperature sensor 17, a water storage tank 18, a third water pump 19 and an electronic thermostat 20, wherein the first water pump 6 is used for transmitting the high-temperature industrial wastewater stored in the wastewater storage tank 21 to the first heat exchange device 1, the first water pump 6 is connected with the left port of the first three-way valve 9 through the first temperature sensor 7 and the first flow sensor 8, the right port of the first three-way valve 9 is connected with one input end of the first heat exchange device 1, one output end of the first heat exchange device 1 is connected with the left port of the third three-way valve 11 through the second three-way valve 10, an upper port of the first three-way valve 9 is connected with an upper port of a third three-way valve 11, and a right port of the third three-way valve 11 is connected with one output end of the third heat exchange device 3; the second water pump 12 is used for transmitting industrial water to the first heat exchange device 1, the second water pump 12 is connected with the other input end of the first heat exchange device 1 through a second temperature sensor 13 and a second flow sensor 14, the other output end of the first heat exchange device 1 is connected with one input end of the second heat exchange device 2 through a third temperature sensor 15, one output end of the second heat exchange device 2 is connected with the other input end of the third heat exchange device 3 through a fourth temperature sensor 16, the other output end of the third heat exchange device 3 is connected with a water storage tank 18 through a fifth temperature sensor 17, and the water storage tank 18 is used for storing the heated industrial water for later use; the inlet end of the hydrogen fuel cell system 4 is connected with the lower port of the electronic thermostat 20 through the third water pump 19, the upper port of the electronic thermostat 20 is connected with the input end of the other path of the second heat exchange device 2, the outlet end of the hydrogen fuel cell system 4 is connected with the right port of the electronic thermostat 20 and the output of the other path of the second heat exchange device 2, the hydrogen fuel cell system 4 is connected with the fuel cell controller 22, and the hydrogen fuel cell system 4 is a water-cooling proton exchange membrane fuel cell system.
Through first three-way valve 9, second three-way valve 10 and the cooperation of third three-way valve 11, can realize two kinds of industrial waste water utilization schemes, specifically do:
in the scheme 1, a first heat exchange device 1 and a third heat exchange device 3 are arranged in series along the industrial wastewater transmission direction, and the first heat exchange device 1, a second heat exchange device 2 and the third heat exchange device 3 are sequentially arranged along the industrial wastewater transmission direction; during the use, industrial waste water flows to the left port of first three-way valve 9 from the waste water storage tank under the drive of first water pump 6, then flows out from the right-hand member mouth of first three-way valve 9 to in first heat transfer device 1, after the heat transfer, flows to the left port of second three-way valve 10 from first heat transfer device 1, then flows out from the right-hand member mouth of second three-way valve 10, and to the left port of third three-way valve 11, then flows out from the right-hand member mouth of third three-way valve 11, and in entering third heat transfer device 3, after accomplishing the heat transfer, industrial waste water is discharged outward from third heat transfer device 3 export all the way.
According to the scheme 2, a first heat exchange device 1 and a third heat exchange device 3 are arranged in parallel along the industrial wastewater transmission direction, and the first heat exchange device 1, the second heat exchange device 2 and the third heat exchange device 3 are sequentially arranged along the industrial wastewater transmission direction; when the heat exchanger is used, industrial wastewater flows from the wastewater storage tank to the left port of the first three-way valve 9 under the driving of the first water pump 6, then flows out from the upper port and the right port of the first three-way valve 9 respectively, the industrial wastewater flowing out from the upper port of the first three-way valve 9 flows to the upper port of the third three-way valve 11, then flows out from the right port of the third three-way valve 11, and enters the third heat exchanger 3, and after heat exchange is completed, the industrial wastewater is discharged from one output end of the third heat exchanger 3; industrial wastewater flowing out of the right port of the first three-way valve 9 enters the first heat exchange device 1, and after heat exchange is completed, the industrial wastewater flows to the left port of the second three-way valve 10 from the first heat exchange device 1 and is discharged outside from the upper port of the second three-way valve 10.
The first heat exchange device 1 mainly carries out convection heat exchange of cold and hot fluids, the temperature and the flow of industrial water are determined by a user, the temperature of industrial wastewater is known, a matched industrial wastewater flow value can be calculated by a mass conservation and energy conservation equation, and the accurate control of the industrial wastewater flow is realized by controlling the rotating speed of the first water pump 6.
As shown in FIG. 2, in control algorithm A, the industrial water flow is at the second flow sensor 14
And the temperature of the industrial water at the second temperature sensor 13
The temperature of the industrial waste water at the first temperature sensor 7 is determined by the user's demand
The first flow sensor 8 is the flow of industrial wastewater, which is known as the input flow
For the output, the first water pump 6 is the controlled object. Because the heat of the industrial wastewater is sufficient and the flow is large, the temperature of the industrial water can be considered to be infinitely close to the temperature of the industrial wastewater under the conditions that the flow of the industrial water is saturated and the heat exchange is sufficient.
The second heat exchange device 2 mainly exchanges heat between the hydrogen fuel cell system 4 and the heat exchanger, heat generated by the fuel cell during working is used for secondary heating of industrial water, the fuel cell controller 22 receives three signals of inlet end temperature of the hydrogen fuel cell system 4, target outlet end temperature of the hydrogen fuel cell system 4 and flow of the industrial water, and further adjusts load current of the electric pile and the electronic thermostat 20, on the basis of ensuring that the temperature of the electric pile is in a proper working temperature range and improving inlet and outlet temperature difference, the power requirement of the heat pump system 5 is met as much as possible, redundant electric energy is stored or merged into a power grid, and the lacking electric energy is supplemented by the power grid. The electronic thermostat 20 is connected with the second heat exchange device 2 and the hydrogen fuel cell system 4 in two paths to respectively form an inner circulation and an outer circulation, and a control signal is sent by a fuel cell controller 22 to ensure that the temperature of the fuel cell is in a proper working temperature range.
The relationship between the electrical energy and the thermal energy generated by the hydrogen fuel cell system 4 can be described as:
further:
in the formula, k represents the efficiency of the hydrogen fuel cell system 4;
represents the total energy [ J ] generated by the hydrogen fuel cell system 4 burning hydrogen]；
Represents the electric energy [ J ] discharged from the hydrogen fuel cell system 4]；
Represents the thermal energy [ J ] released from the hydrogen fuel cell system 4]。
Because the output power of the fuel cell is limited, when the power required by the heat pump is less than the rated power of the fuel cell, the fuel cell works at low power, the power supply requirement of the heat pump is just met, or the rated power of the fuel cell works, and redundant electric energy is transferred or connected to the grid; when the power required by the heat pump is larger than the rated power of the fuel cell, the rated power of the fuel cellThe lacking electric energy is supplemented by the power grid, and the supply and demand relationship can be described as follows:
in the formula (I), the compound is shown in the specification,
for the power demand of the heat pump [ kW)]；
Rated power [ kW ] for fuel cell]；
Exchanging power for the grid [ kW)]。
As shown in fig. 3, in the control algorithm B, the temperature of the process water at the third temperature sensor 15 is set for the hydrogen fuel cell system 4
The flow rate of the industrial water at the second flow sensor 14
Optimizing the index
Hydrogen price
Price of electricity
For input, current load
Is the output quantity.
The third heat exchange device 3 mainly exchanges heat between the heat pump system 5 and the heat exchanger, recovers heat in a large amount of industrial wastewater through the heat pump and is used for heating industrial water for three times, input signals of a controller of the heat pump system 5 are input electric power and an industrial water outlet target temperature value, a feedforward correction link is added for two disturbance quantities, namely industrial water flow and industrial water temperature, and a negative feedback link is added to reduce deviation of a temperature output value and a target expected value.
As shown in FIG. 4, in control algorithm B, for the heat pump system 5, the temperature of the process water at the fourth temperature sensor
The flow rate of the industrial water at the second flow sensor 14
For disturbing the amount, current load
For input, the temperature of the process water at the fifth temperature sensor 17
Is a controlled quantity.
The traditional industrial water heating mode is heating by burning natural gas, and the average price of domestic natural gas is 3.5 yuan/m3，1m3The energy of the natural gas can be generated by 33MJ, and the energy price of the obtained natural gas is 9.4 MJ/yuan. If the boiler efficiency is 80%, 1m3The energy of 26.4MJ after the natural gas is combusted can be directly used for heating industrial water, so the actual energy price of the natural gas is 11.75 MJ/yuan; the price of domestic hydrogen is 30 yuan/kg, the rated efficiency of the proton exchange membrane fuel cell is generally more than 50%, if the fuel cell consumes 1kg of hydrogen, 16kWH electric energy and 16kWH heat energy can be generated by the fuel cell, if the efficiency cop of the heat pump is 4, 64kWH heat energy can be recovered by the 16kWH electric energy, 80kWH heat energy, namely 288MJ, can be obtained by the system when consuming 1kg of hydrogen, and the energy price of the obtained hydrogen is 9.6 MJ/yuan and is slightly lower than that of natural gas. Therefore, the economic benefit of the interconnected system of the invention is slightly higher than that of the natural gas combustion heating mode.
Finally, it should be noted that the above embodiments are merely representative examples of the present invention. It is obvious that the invention is not limited to the above-described embodiments, but that many variations are possible. Any simple modification, equivalent change and modification made to the above embodiments in accordance with the technical spirit of the present invention should be considered to be within the scope of the present invention.
Claims (6)
1. A hydrogen fuel cell and heat pump interconnection system is characterized by comprising a first heat exchange device, a second heat exchange device, a third heat exchange device, a hydrogen fuel cell system, a heat pump system, a control algorithm A and a control algorithm B, wherein the first heat exchange device is used for heating industrial water for the first time by utilizing heat of the industrial wastewater, the second heat exchange device is connected with the hydrogen fuel cell system, the second heat exchange device is used for heating the industrial water for the second time by utilizing heat energy generated by the hydrogen fuel cell system, the third heat exchange device is connected with the heat pump system, the heat pump system is used for recovering heat energy of the industrial wastewater by utilizing electric energy generated by the hydrogen fuel cell system, and the industrial water is heated to a target temperature by the third heat exchange device; the control algorithm A is used for adjusting the industrial wastewater flow according to the industrial water flow, the industrial water temperature and the industrial wastewater temperature; and the control algorithm B is used for adjusting the load current of the hydrogen fuel cell system and the extra required power from the power grid according to the industrial wastewater flow, the temperature of the industrial water at the inlet end of the hydrogen fuel cell system and the target temperature of the industrial water at the outlet end of the hydrogen fuel cell system so as to ensure the electric energy requirement of the heat pump system and ensure that the temperature of the industrial water at the outlet end of the third heat exchange device reaches the target temperature.
2. The interconnected system of hydrogen fuel cell and heat pump as claimed in claim 1, wherein the first heat exchange device and the third heat exchange device are arranged in series or in parallel along the industrial wastewater transmission direction, and the first heat exchange device, the second heat exchange device and the third heat exchange device are arranged in sequence along the industrial wastewater transmission direction.
3. The interconnected system of hydrogen fuel cell and heat pump as claimed in claim 2, further comprising a first water pump, a first temperature sensor, a first flow sensor, a first three-way valve, a second three-way valve, a third three-way valve, a second water pump, a second temperature sensor, a second flow sensor, a third temperature sensor, a fourth temperature sensor, a fifth temperature sensor, a water storage tank, a third water pump, and an electronic thermostat, wherein the first water pump is connected with the left port of the first three-way valve through the first temperature sensor and the first flow sensor, the right port of the first three-way valve is connected with one input end of the first heat exchange device, one output end of the first heat exchange device is connected with the left port of the third three-way valve through the second three-way valve, and the upper port of the first three-way valve is connected with the upper port of the third three-way valve, the right port of the third three-way valve is connected with one input end of the third heat exchange device; the second water pump is connected with the other input end of the first heat exchange device through a second temperature sensor and a second flow sensor, the other output end of the first heat exchange device is connected with the other input end of the second heat exchange device through a third temperature sensor, the other output end of the second heat exchange device is connected with the other input end of the third heat exchange device through a fourth temperature sensor, and the other output end of the third heat exchange device is connected with the water storage tank through a fifth temperature sensor; the outlet end of the hydrogen fuel cell system is connected with the lower port of the electronic thermostat through a third water pump, the upper port of the electronic thermostat is connected with the input end of the other path of the second heat exchange device, the inlet end of the hydrogen fuel cell system is connected with the right port of the electronic thermostat and the output end of the other path of the second heat exchange device, and the hydrogen fuel cell system is connected with the fuel cell controller.
4. The interconnected system of hydrogen fuel cell and heat pump as claimed in claim 3, wherein in the control algorithm A, the flow rate of the industrial water at the second flow sensor, the temperature of the industrial water at the second temperature sensor and the temperature of the industrial wastewater at the first temperature sensor are input quantities, the flow rate of the industrial wastewater at the first flow sensor is an output quantity, the first water pump is a controlled object, and the first water pump performs rotation speed adjustment according to the flow rate of the industrial wastewater.
5. The interconnected system of hydrogen fuel cell and heat pump as claimed in claim 3, wherein in the control algorithm B, for the hydrogen fuel cell system, the temperature of the industrial water at the third temperature sensor, the flow rate of the industrial water at the second flow rate sensor, the optimization index, the price of hydrogen gas and the price of electricity are input quantities, and the current load is output quantity.
6. The interconnected system of hydrogen fuel cell and heat pump as claimed in claim 3, wherein in the control algorithm B, for the heat pump system, the temperature of the industrial water at the fourth temperature sensor, the flow rate of the industrial water at the second flow sensor are disturbance values, the current load is an input value, and the temperature of the industrial water at the fifth temperature sensor is a controlled value.
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