Fixed hydrogen fuel cell cogeneration system
By designing a fixed hydrogen fuel cell co-heating and power supply system, using hydrogen fuel cells and a variety of heat exchange equipment, the problem of low energy utilization efficiency of existing co-heating and power supply systems is solved, and more efficient energy conversion and utilization is achieved.
Patent Information
- Application Number
- CN202420362975.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-27
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2034-02-27
AI Technical Summary
The energy utilization efficiency of the existing co-heat and power supply systems is low and needs to be improved.
Design a fixed hydrogen fuel cell co-heating and power supply system, including hydrogen fuel cell, power supply module and heating module, increase voltage through DC converter, and use heat exchangers, hot water tanks, cold water tanks, geothermal wells and ground source heat pumps Conduct heat energy exchange to provide users with electrical energy and thermal energy, and the control device monitors and adjusts the system operation in real time.
It effectively improves the efficiency of energy utilization, and improves the energy conversion efficiency of the system through boost power supply and various heat exchange methods.
Smart Images
Figure CN222187190U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of heat and power cogeneration, in particular to a fixed hydrogen fuel cell heat and power cogeneration system. Background Art
[0002] Combined heat and power refers to a method by which a thermal power plant outputs both electrical energy and thermal energy to users. One way to achieve combined heat and power is through fuel cells, which directly converts the chemical energy of the fuel into electrical energy through electrochemical reactions. When the fuel cell is working, the heat generated provides heat to the user through the heating device and provides electrical energy to the user through the power supply device. However, the energy utilization efficiency of the current combined heat and power system has room for further improvement. Utility Model Content
[0003] The utility model aims to provide a fixed hydrogen fuel cell cogeneration system to improve the energy utilization efficiency.
[0004] In order to achieve the above object, the utility model provides a fixed hydrogen fuel cell cogeneration system, comprising:
[0005] Hydrogen fuel cells, used to generate electricity and heat;
[0006] A power supply module, comprising a DC converter, a busbar and an energy storage battery, wherein the output end of the DC converter is electrically connected to the energy storage battery through the busbar, the input end of the DC converter is electrically connected to the hydrogen fuel cell and is used to increase the output voltage of the hydrogen fuel cell, and the busbar is used to provide power to the user end;
[0007] A heating module, comprising a heat exchanger, a hot water tank, a cold water tank, a geothermal well and a ground source heat pump, wherein the heat exchanger is connected to the hydrogen fuel cell for heat exchange, the hot water tank and the cold water tank are respectively connected to the heat exchanger pipeline, and when heating is performed, the water in the hot water tank flows to the user end, and then flows from the user end to the cold water tank; the heat exchanger is connected to the geothermal well for heat exchange, the first end of the ground source heat pump is connected to the geothermal well for heat exchange, and the second end of the ground source heat pump is used to provide heating or cooling for the user end; and
[0008] The control device is used to control the hydrogen fuel cell, the power supply module and the heating module, and receive the demand signal generated by the user end.
[0009] In some embodiments, a first ammeter and a first voltmeter are installed between the hydrogen fuel cell and the DC converter, and the first ammeter and the first voltmeter are respectively connected to the control device signal.
[0010] In some embodiments, a second ammeter and a second voltmeter are installed between the bus and the user end, and the second ammeter and the second voltmeter are respectively connected to the control device signal.
[0011] In some embodiments, a first temperature sensor is installed between the heat exchanger and the hot water tank, and a second temperature sensor is installed between the heat exchanger and the cold water tank. The first temperature sensor and the second temperature sensor are respectively connected to the control device by signal.
[0012] In some embodiments, a third temperature sensor is installed between the heat exchanger and the geothermal well, and the third temperature sensor is connected to the control device by signal.
[0013] In some embodiments, the user end is provided with a fourth temperature sensor, and the fourth temperature sensor is signal-connected to the control device.
[0014] In some embodiments, the output voltage of the DC converter is 700-1000V.
[0015] In some embodiments, the heat exchanger is a water-cooled plate heat exchanger.
[0016] The utility model provides a fixed hydrogen fuel cell cogeneration system, which has the following beneficial effects compared with the prior art:
[0017] The electricity generated by the installed hydrogen fuel cell is provided to the user end after being boosted by the power supply module. The installed heat exchanger is connected to the hydrogen fuel cell and the hot well for heat exchange respectively, and the hot water tank and the cold water tank are used to effectively provide heat to the user end. The geothermal well is also connected to the ground source heat pump for heat exchange. The ground source heat pump can provide heating or cooling for the user end, thereby improving the utilization efficiency of energy. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 A schematic diagram of the principle structure of a stationary hydrogen fuel cell cogeneration system provided in an embodiment of the utility model.
[0019] In the figure: 1. hydrogen fuel cell; 2. power supply module; 21. DC converter; 22. busbar; 23. energy storage battery; 3. heating module; 31. heat exchanger; 32. hot water tank; 33. cold water tank; 34. geothermal well; 35. ground source heat pump; 36. first temperature sensor; 37. second temperature sensor; 38. third temperature sensor; 4. control device; 5. user end; 51. fourth temperature sensor; 6. first ammeter; 7. first voltmeter; 8. second ammeter; 9. second voltmeter. DETAILED DESCRIPTION
[0020] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments.
[0021] It should be understood that, in the description of the present application, the terms "upper", "lower", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application 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 a limitation on the present application. The terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated, that is, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In addition, unless otherwise specified, "multiple" means two or more.
[0022] like Figure 1 As shown, the fixed hydrogen fuel cell cogeneration system of the embodiment of the utility model includes a hydrogen fuel cell 1, a power supply module 2, a heating module 3 and a control device 4. The hydrogen fuel cell 1 is used to generate electrical energy and thermal energy; the power supply module 2 includes a DC converter 21, a bus 22 and an energy storage battery 23, the output end of the DC converter 21 is electrically connected to the energy storage battery 23 through the bus 22, the input end of the DC converter 21 is electrically connected to the hydrogen fuel cell 1, and is used to increase the output voltage of the hydrogen fuel cell 1, and the bus 22 is used to provide electrical energy to the user end 5; the heating module 3 includes a heat exchanger 31, a hot water tank 32, a cold water tank 33, a geothermal well 34 and a ground source heat pump 35, the heat exchanger 31 is connected to the hydrogen fuel cell 1 for heat exchange, and the hot water tank 32 is connected to the hot water tank 33, and the hot water tank 33 is connected to the hot water tank 34. The tank 32 and the cold water tank 33 are respectively connected to the pipeline of the heat exchanger 31. When heating is provided, the water in the hot water tank 32 flows to the user end 5, and then flows from the user end 5 to the cold water tank 33; the heat exchanger 31 is connected to the geothermal well 34 for heat exchange, and the first end of the ground source heat pump 35 is connected to the geothermal well 34 for heat exchange, and the second end of the ground source heat pump 35 is used to provide heating or cooling for the user end 5; the control device 4 is used to control the power generation power and time of the hydrogen fuel cell 1, the power supply voltage of the power supply module 2, and the heating temperature and time of the heating module 3, and receive the demand signal generated by the user end 5.
[0023] It should be noted that the working principle of the ground source heat pump 35 is as follows: when operating in summer, the evaporator of the heat pump unit absorbs heat from the building at the user end 5 and reaches the refrigeration air conditioner, while the condenser discharges the heat into the ground through heat exchange with the geothermal well 34; when operating in winter, the evaporator of the heat pump unit absorbs heat from the geothermal well 34 as a heat source, and through the heat pump cycle, the condenser provides hot water to heat the indoor building at the user end 5.
[0024] During operation, the electric energy generated by the hydrogen fuel cell 1 when starting up is boosted by the DC converter 21 and stored in the energy storage battery 23 to provide electric energy to the user end 5. The heat generated by the hydrogen fuel cell 1 is exchanged with the heat exchanger 31 to provide heat to the user end 5 through the hot water tank 32 and the cold water tank 33.
[0025] Based on the above configuration, the fixed hydrogen fuel cell cogeneration system of the utility model effectively improves the energy utilization efficiency.
[0026] In one embodiment, a first ammeter 6 and a first voltmeter 7 are installed between the hydrogen fuel cell 1 and the DC converter 21, and the first ammeter 6 and the first voltmeter 7 are respectively connected to the control device 4 by signals. The first ammeter 6 is used to measure the output current value of the hydrogen fuel cell 1, and the first voltmeter 6 is used to measure the output voltage value of the hydrogen fuel cell 1.
[0027] In one embodiment, a second ammeter 8 and a second voltmeter 9 are installed between the busbar 22 and the user terminal 5, and the second ammeter 8 and the second voltmeter 9 are respectively connected to the control device 4 by signals. The second ammeter 8 is used to measure the current value connected to the user terminal 5, and the second voltmeter 9 is used to measure the voltage value connected to the user terminal 5.
[0028] In one embodiment, a first temperature sensor 36 is installed between the heat exchanger 31 and the hot water tank 32, and a second temperature sensor 37 is installed between the heat exchanger 31 and the cold water tank 33. The first temperature sensor 36 and the second temperature sensor 37 are respectively connected to the control device 4 by signal. The first temperature sensor 36 is used to measure the water flow temperature between the heat exchanger 31 and the hot water tank 32; the second temperature sensor 37 is used to measure the water flow temperature between the heat exchanger 31 and the cold water tank 33.
[0029] In one embodiment, a third temperature sensor 38 is installed between the heat exchanger 31 and the geothermal well 34, and the third temperature sensor 38 is connected to the control device 4 by signal. Two third temperature sensors 38 are provided, which are used to measure the temperature of water flowing into and out of the heat exchanger 31 respectively.
[0030] In one embodiment, the user end 5 is provided with a fourth temperature sensor 51, and the fourth temperature sensor 51 is signal-connected to the control device 4. The fourth temperature sensor 51 is used to obtain the temperature in the building of the user end 5.
[0031] Specifically, the output voltage of the DC converter 21 is 700-1000V, and the DC converter 21 can increase circuit stability and reliability by increasing the voltage.
[0032] Specifically, the heat exchanger 31 is a water-cooled plate heat exchanger, which has the advantages of small size and light weight, and is convenient and reliable to use.
[0033] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principle of the present invention. These improvements and substitutions should also be regarded as the protection scope of the present invention.
Claims
1. A stationary hydrogen fuel cell cogeneration system, characterized in that: include: Hydrogen fuel cells, used to generate electricity and heat; A power supply module, comprising a DC converter, a busbar and an energy storage battery, wherein the output end of the DC converter is electrically connected to the energy storage battery through the busbar, the input end of the DC converter is electrically connected to the hydrogen fuel cell and is used to increase the output voltage of the hydrogen fuel cell, and the busbar is used to provide power to the user end; A heating module, comprising a heat exchanger, a hot water tank, a cold water tank, a geothermal well and a ground source heat pump, wherein the heat exchanger is connected to the hydrogen fuel cell for heat exchange, the hot water tank and the cold water tank are respectively connected to the heat exchanger pipeline, and when heating is performed, the water in the hot water tank flows to the user end, and then flows from the user end to the cold water tank; the heat exchanger is connected to the geothermal well for heat exchange, the first end of the ground source heat pump is connected to the geothermal well for heat exchange, and the second end of the ground source heat pump is used to provide heating or cooling for the user end; and The control device is used to control the hydrogen fuel cell, the power supply module and the heating module, and receive the demand signal generated by the user end.
2. The stationary hydrogen fuel cell cogeneration system according to claim 1, characterized in that: A first ammeter and a first voltmeter are installed between the hydrogen fuel cell and the DC converter, and the first ammeter and the first voltmeter are respectively connected to the control device signal.
3. The stationary hydrogen fuel cell cogeneration system according to claim 1, characterized in that: A second ammeter and a second voltmeter are installed between the busbar and the user end, and the second ammeter and the second voltmeter are respectively connected to the control device signal.
4. The stationary hydrogen fuel cell cogeneration system according to claim 1, characterized in that: A first temperature sensor is installed between the heat exchanger and the hot water tank, and a second temperature sensor is installed between the heat exchanger and the cold water tank. The first temperature sensor and the second temperature sensor are respectively connected to the control device by signal.
5. The stationary hydrogen fuel cell cogeneration system according to claim 1, characterized in that: A third temperature sensor is installed between the heat exchanger and the geothermal well, and the third temperature sensor is connected to the control device by signal.
6. The stationary hydrogen fuel cell cogeneration system according to claim 1, characterized in that: The user end is provided with a fourth temperature sensor, and the fourth temperature sensor is signal-connected to the control device.
7. The stationary hydrogen fuel cell cogeneration system according to claim 1, characterized in that: The output voltage of the DC converter is 700-1000V.
8. The stationary hydrogen fuel cell cogeneration system according to claim 1, characterized in that: The heat exchanger is a water-cooled plate heat exchanger.