CN220209024U - Cascade type fuel cell cogeneration system with high-efficiency heat recovery - Google Patents
Cascade type fuel cell cogeneration system with high-efficiency heat recovery Download PDFInfo
- Publication number
- CN220209024U CN220209024U CN202321725666.4U CN202321725666U CN220209024U CN 220209024 U CN220209024 U CN 220209024U CN 202321725666 U CN202321725666 U CN 202321725666U CN 220209024 U CN220209024 U CN 220209024U
- Authority
- CN
- China
- Prior art keywords
- fuel cell
- heat
- tail gas
- heat exchanger
- cogeneration system
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000000446 fuel Substances 0.000 title claims abstract description 98
- 238000011084 recovery Methods 0.000 title claims abstract description 39
- 238000001816 cooling Methods 0.000 claims abstract description 31
- 230000001105 regulatory effect Effects 0.000 claims abstract description 31
- 230000017525 heat dissipation Effects 0.000 claims abstract description 16
- 239000002826 coolant Substances 0.000 claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000007789 gas Substances 0.000 claims description 41
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 9
- 239000001257 hydrogen Substances 0.000 claims description 9
- 229910052739 hydrogen Inorganic materials 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 4
- 239000008399 tap water Substances 0.000 claims description 3
- 235000020679 tap water Nutrition 0.000 claims description 3
- 239000002918 waste heat Substances 0.000 description 9
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005338 heat storage Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003487 electrochemical reaction Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Fuel Cell (AREA)
Abstract
The utility model discloses a cascade fuel cell cogeneration system with high-efficiency heat recovery, which comprises a plurality of fuel cell subsystems, a main heat exchanger, a heat dissipation device, a circulating pump, a first flow regulating valve and a second flow regulating valve, wherein the fuel cell subsystems comprise an internal circulation cooling pipeline and a tail gas heat exchange device; the outlet of the internal circulation cooling pipeline is respectively connected with the hot side pipeline inlet of the main heat exchanger and the cooling medium input end of the heat dissipation device through a second flow regulating valve, the hot side pipeline outlet of the main heat exchanger and the cooling medium output end of the heat dissipation device are connected with the input end of the circulating pump, and the output end of the circulating pump is connected with the inlet of the internal circulation cooling pipeline; the tail gas discharged by the hot side inlet input subsystem of the tail gas heat exchange device, the tail gas and condensed water are output from the hot side outlet, the external cold source is input from the cold side pipeline inlet, the cold side pipeline outlet is connected with the cold side inlet of the main heat exchanger, and the heated external cold source is output from the cold side outlet of the main heat exchanger. The system can improve the heat recovery efficiency of the fuel cell.
Description
Technical Field
The utility model relates to the technical field of fuel cells, in particular to a cascade type fuel cell cogeneration system with high-efficiency heat recovery.
Background
The hydrogen fuel cell utilizes the electrochemical reaction of hydrogen (or hydrogen-rich gas) and air (or oxygen) to convert chemical energy into electric energy and heat energy, has the advantages of cleanness, environment friendliness, high power generation efficiency, low noise, long service life and the like, and has important significance for conversion of energy structures and systems in China into cleanness, low carbonization and safety. The current fuel cell cogeneration system has the problem of low heat recovery efficiency, or the problem that the control complexity is improved and the heat supply temperature is insufficient due to high recovery efficiency, and in addition, the conditions of high-efficiency heat recovery and user heat demand change during the cascade operation of the fuel cell system are not considered.
The utility model patent application CN114156502A discloses a fuel cell cogeneration system, which comprises a fuel cell stack (41), an air subsystem, a hydrogen subsystem, a cooling subsystem, a waste heat recovery subsystem, an electric subsystem and an auxiliary cooling subsystem, wherein the air subsystem and the hydrogen subsystem are used for supplying oxygen and hydrogen to the fuel cell stack (41), the cooling subsystem is used for carrying out cold and hot circulation with the fuel cell stack (41), the waste heat recovery subsystem is connected with the cooling subsystem, the waste heat recovery subsystem stores heat output by the fuel cell stack (41) and supplies heat to the outside, the electric subsystem is connected with an electric energy output end of the fuel cell stack (41), and the auxiliary cooling subsystem is connected with the electric subsystem and is used for cooling electric devices in the electric subsystem. However, the cogeneration system does not recover the heat of the electrical components and the heat of the exhaust gas.
The utility model patent CN216624353U discloses a thermal cycle management and heating system of a fuel cell combined heat and power system, which comprises a fuel cell pile module radiating waterway, a heat storage system waterway and an auxiliary part radiating waterway, wherein the auxiliary part radiating waterway is used for exchanging heat in parts with the outside, the fuel cell pile module radiating waterway comprises a first cycle radiating system and a second cycle radiating system, and water storage devices are arranged in the heat storage system waterway and the auxiliary part radiating waterway. The first circulating heat dissipation system comprises a galvanic pile module, an electronic thermostat, a pile outlet temperature sensor, a first circulating water pump, a pile inlet temperature sensor, a pile inlet pressure sensor and a drain valve. Although this system recovers heat from electrical components and stacks, no recovery is made to the exhaust heat.
The utility model patent CN218414650U discloses a high-efficiency heat recovery system of a fuel cell cogeneration system, which comprises a main heat exchanger, an auxiliary heat exchanger and a tail gas waste heat recovery device, wherein the main heat exchanger is arranged at a fuel cell stack, the auxiliary heat exchanger is arranged at an inverter, the tail gas waste heat recovery device is arranged near the tail end of a tail gas discharge pipe, water inlets of the tail gas waste heat recovery device, the main heat exchanger and the auxiliary heat exchanger are all connected to a cold water inlet pipe through three branch pipes, a first control valve, a second control valve and a third control valve are respectively arranged on the three branch pipes, water outlets of the tail gas waste heat recovery device and the auxiliary heat exchanger are connected to the water inlet of the main heat exchanger, and a water outlet of the main heat exchanger is connected to a hot water outlet pipe. The cold source of the heat recovery system is divided into three paths, the heat of the tail gas, the electric components and the electric pile is recovered respectively, the cold source heated by the tail gas and the electric components is mixed with the cold source of the electric pile to recover the heat of the electric pile, and the three paths are all regulated by valves, so that the control difficulty is high, and the heat supply temperature cannot be ensured.
Disclosure of Invention
In order to solve the problems, the utility model provides a cascade type fuel cell cogeneration system with high-efficiency heat recovery, which can improve the heat recovery efficiency of a fuel cell and obtain higher heat supply temperature at the same time; the expansion can be performed according to cascade connection of the fuel cell system, and the fuel cell system units can operate under different working conditions; the normal operation of the fuel cell system can be ensured not to be influenced under the working condition that the heat demand of a user changes or no cold source exists.
The technical scheme adopted by the utility model is as follows:
the utility model provides a cascade fuel cell cogeneration system of high-efficient heat recovery, includes a plurality of fuel cell subsystems, main heat exchanger, heat abstractor, circulating pump, first flow control valve and second flow control valve, the fuel cell subsystem includes inner loop cooling pipeline and tail gas heat transfer device.
The outlet of the internal circulation cooling pipeline is respectively connected with the hot side pipeline inlet of the main heat exchanger and the cooling medium input end of the heat dissipating device through a second flow regulating valve, the hot side pipeline outlet of the main heat exchanger and the cooling medium output end of the heat dissipating device are connected with the input end of the circulation pump, and the output end of the circulation pump is connected with the inlet of the internal circulation cooling pipeline.
The hot side inlet of the tail gas heat exchange device inputs tail gas discharged by the fuel cell subsystem, the hot side outlet outputs cooled tail gas and condensed water, the cold side pipeline inlet inputs an external cold source, the cold side pipeline outlet is connected with the cold side inlet of the main heat exchanger, and the cold side outlet of the main heat exchanger outputs a heated external cold source.
Further, the fuel cell subsystem further comprises a fuel cell stack and electric components, wherein the fuel cell stack and the internal circulation cooling pipelines corresponding to the electric components are connected in parallel, and the fuel cell stack and the internal circulation cooling pipelines corresponding to the electric components are connected in parallel with the internal circulation cooling pipelines of the rest fuel cell subsystem after being converged.
Further, the tail gas heat exchange device is configured to perform primary full heat exchange between the tail gas discharged by the fuel cell stack and an external cold source, the heated external cold source performs secondary heat exchange with the main heat exchanger after the heat of the tail gas is recovered, and the cooled tail gas and condensed water are naturally discharged.
Further, the fuel cell subsystem also includes a third flow regulating valve disposed between the circulation pump and the internal circulation cooling line of the fuel cell subsystem.
Further, the third flow regulating valve is configured to regulate the flow of cooling medium into each fuel cell subsystem to accommodate different fuel cell subsystem operating condition requirements.
Further, the second flow regulating valve is configured to regulate the flow of cooling medium into the main heat exchanger and the heat sink to accommodate reduced or no heating demand.
Further, the second flow regulating valve comprises a three-way regulating valve.
Further, the external cold source comprises tap water.
Further, the electrical components of the fuel cell subsystem that require heat dissipation include a dc converter.
Further, the electrical components of the fuel cell subsystem that require heat dissipation include an air compressor, an air compressor controller, and a hydrogen pump controller.
The utility model has the beneficial effects that:
1. the heat generated by the electrical components is recycled without increasing the complexity of the system.
2. The method adopts a two-stage waste heat recovery mode, the latent heat of the vapor in the tail gas is fully utilized by utilizing the low-temperature cold source, and then the heat with higher temperature generated by the electric pile is recovered, so that the heat recovery efficiency is greatly improved.
3. By controlling the flow of the cold source, high-grade heat can be obtained as much as possible while high-efficiency heat recovery is performed.
4. By adjusting the flow of the cooling medium entering the heat dissipation module and the main heat exchanger, the normal operation of the fuel cell system can be ensured not to be influenced while the heat demand is changed.
5. The system can be expanded according to the cascade requirements of the fuel cells, and different fuel cell systems can operate under different working conditions.
Drawings
Fig. 1 is one of the schematic diagrams of a cascade fuel cell cogeneration system for efficient heat recovery in accordance with an embodiment of the utility model.
FIG. 2 is a schematic diagram of a tandem fuel cell cogeneration system with efficient heat recovery according to an embodiment of the utility model.
Reference numerals: 1-a fuel cell subsystem (namely FC 1-FCn), 2-a main heat exchanger, 3-a heat radiating device, 4-a circulating pump, 5-a first flow regulating valve and 6-a second flow regulating valve; 101-a fuel cell stack, 102-an electrical component, 103-an exhaust heat exchange device, 104-a third flow regulating valve.
Detailed Description
Specific embodiments of the present utility model will now be described in order to provide a clearer understanding of the technical features, objects and effects of the present utility model. It should be understood that the particular embodiments described herein are illustrative only and are not intended to limit the utility model, i.e., the embodiments described are merely some, but not all, of the embodiments of the utility model. All other embodiments, which can be made by a person skilled in the art without making any inventive effort, are intended to be within the scope of the present utility model.
As shown in fig. 1, the present embodiment provides a cascade fuel cell cogeneration system with efficient heat recovery, which includes a plurality of fuel cell subsystems 1, a main heat exchanger 2, a heat dissipating device 3, a circulation pump 4, a first flow rate adjusting valve 5 and a second flow rate adjusting valve 6, wherein the fuel cell subsystems 1 include an internal circulation cooling pipeline and an exhaust gas heat exchanging device 103, and the heat dissipating device comprises:
the outlet of the internal circulation cooling pipeline is respectively connected with the hot side pipeline inlet of the main heat exchanger 2 and the cooling medium input end of the heat dissipating device 3 through a second flow regulating valve 6, the hot side pipeline outlet of the main heat exchanger 2 and the cooling medium output end of the heat dissipating device 3 are connected with the input end of the circulating pump 4, and the output end of the circulating pump 4 is connected with the inlet of the internal circulation cooling pipeline.
The hot side inlet of the tail gas heat exchange device 103 inputs the tail gas discharged by the fuel cell subsystem 1, the hot side outlet outputs the cooled tail gas and condensed water, the cold side pipeline inlet inputs an external cold source, the cold side pipeline outlet is connected with the cold side inlet of the main heat exchanger 2, and the cold side outlet of the main heat exchanger 2 outputs the heated external cold source.
Preferably, the fuel cell subsystem 1 further comprises a fuel cell stack 101 and an electrical component 102, the cooling pipelines corresponding to the fuel cell stack 101 and the electrical component 102 are connected in parallel, and after being combined, the cooling pipelines are connected in parallel with the cooling pipelines of the rest of the fuel cell subsystem 1, so that the heat generated by the fuel cell stack 101 and the electrical component 102 is fully recovered. The electric component 102 requiring heat dissipation may be a dc converter, an air compressor controller, a hydrogen pump controller, or the like.
The tail gas heat exchange device 103 is used for performing primary full heat exchange on the tail gas discharged by the fuel cell stack 101 and an external cold source, fully recovering a small amount of sensible heat and a large amount of latent heat of vapor in the tail gas by using the external cold source with low temperature, recovering the heat of the tail gas, performing secondary heat exchange on the heated external cold source and the main heat exchanger 2, and naturally discharging the cooled tail gas and condensed water. In this process, the flow rate of the external cold source can be controlled by adjusting the first flow rate adjusting valve, so as to provide a sufficiently high heat supply temperature for the user, and the heat supply temperature can be equal to the temperature of the fuel cell stack 101 if the end difference of the heat exchanger and the heat preservation limit of the pipeline are not considered in the ideal case.
Preferably, as shown in fig. 2, the tail gas of the fuel cell stack 101 may be mixed and intensively discharged and then subjected to heat exchange by the tail gas heat exchange device 103.
Preferably, the fuel cell subsystem 1 further comprises a third flow regulating valve 104, and the third flow regulating valve 104 is arranged between the circulation pump 4 and the cooling pipeline of the fuel cell subsystem 1, and is used for regulating the flow of cooling medium entering each fuel cell subsystem 1 to adapt to the operating condition requirements of different fuel cell subsystems 1.
Preferably, the second flow regulating valve 6 is configured to regulate the flow of cooling medium into the main heat exchanger 2 and the heat sink 3, adapting to reduced or no heating demand. More preferably, the second flow rate regulating valve 6 may be a three-way regulating valve.
Preferably, the external cold source may be tap water.
In addition, when an external cold source is not provided from the outside or the heat exchange capacity of the main heat exchanger 2 is reduced, the fuel cell subsystem 1 can be operated normally, and the excessive heat can be discharged through the heat sink 3.
The cascade fuel cell cogeneration system of the embodiment has the following characteristics:
1. the two-stage heat recovery is adopted, an external cold source with lower external temperature exchanges heat with the tail gas firstly (the external cold source can exchange heat with the fuel cell subsystem 1 which is connected in parallel respectively, and can exchange heat after the tail gas of the fuel cell subsystem 1 is collected), so that the heat of the tail gas is fully recovered;
2. the cooling pipelines of the electric components 102 are arranged in parallel with the fuel cell stack 101, and the heat generated by the electric components 102 is recovered while the heat dissipation of the electric components 102 is satisfied by the flow distribution through the pipelines;
3. by adjusting the flow of the external cold source, the high heat supply temperature can be ensured while the high-efficiency heat recovery is realized;
4. a third flow regulating valve 104 is provided in the fuel cell subsystem 1 to regulate the flow it requires, and different fuel cell subsystems 1 may operate under different conditions.
5. When no external cold source or no waste heat is required, the flow rate entering the main heat exchanger 2 and the heat dissipation device 3 is regulated through the second flow rate regulating valve 6 (such as a three-way regulating valve or other regulating mechanisms), so that the normal power generation operation of the fuel cell subsystem 1 can be ensured, and at the moment, the tail gas is naturally discharged without heat recovery, so that the power consumption of the heat dissipation device 3 is reduced.
The foregoing is merely a preferred embodiment of the utility model, and it is to be understood that the utility model is not limited to the form disclosed herein but is not to be construed as excluding other embodiments, but is capable of numerous other combinations, modifications and environments and is capable of modifications within the scope of the inventive concept, either as taught or as a matter of routine skill or knowledge in the relevant art. And that modifications and variations which do not depart from the spirit and scope of the utility model are intended to be within the scope of the appended claims.
Claims (10)
1. The cascade fuel cell cogeneration system with high-efficiency heat recovery is characterized by comprising a plurality of fuel cell subsystems, a main heat exchanger, a heat dissipation device, a circulating pump, a first flow regulating valve and a second flow regulating valve, wherein the fuel cell subsystems comprise an internal circulating cooling pipeline and a tail gas heat exchange device;
the outlet of the internal circulation cooling pipeline is respectively connected with the hot side pipeline inlet of the main heat exchanger and the cooling medium input end of the heat dissipation device through a second flow regulating valve, the hot side pipeline outlet of the main heat exchanger and the cooling medium output end of the heat dissipation device are connected with the input end of a circulation pump, and the output end of the circulation pump is connected with the inlet of the internal circulation cooling pipeline;
the hot side inlet of the tail gas heat exchange device inputs tail gas discharged by the fuel cell subsystem, the hot side outlet outputs cooled tail gas and condensed water, the cold side pipeline inlet inputs an external cold source, the cold side pipeline outlet is connected with the cold side inlet of the main heat exchanger, and the cold side outlet of the main heat exchanger outputs a heated external cold source.
2. The cascade type fuel cell cogeneration system with high-efficiency heat recovery according to claim 1, wherein the fuel cell subsystem further comprises a fuel cell stack and an electric component, wherein the internal circulation cooling pipelines corresponding to the fuel cell stack and the electric component are connected in parallel, and the integrated internal circulation cooling pipelines are connected in parallel with the internal circulation cooling pipelines of the other fuel cell subsystems.
3. The cascade fuel cell cogeneration system of claim 1, wherein the tail gas heat exchange device is configured to perform primary full heat exchange between the tail gas discharged from the fuel cell stack and an external cold source, the heated external cold source performs secondary heat exchange with a main heat exchanger after recovering the heat of the tail gas, and the cooled tail gas and condensed water are naturally discharged.
4. The efficient heat recovery cascade fuel cell cogeneration system of claim 1, wherein the fuel cell subsystem further comprises a third flow control valve disposed between the circulation pump and the internal circulation cooling circuit of the fuel cell subsystem.
5. The high efficiency heat recovery cascade fuel cell cogeneration system of claim 4, wherein the third flow control valve is configured to adjust the flow of cooling medium into each fuel cell subsystem to accommodate different fuel cell subsystem operating condition demands.
6. A high efficiency heat recovery cascade fuel cell cogeneration system according to claim 1, wherein said second flow regulating valve is configured to regulate the flow of cooling medium into the primary heat exchanger and the heat sink to accommodate reduced or no heating demand.
7. A high efficiency heat recovery cascade fuel cell cogeneration system according to claim 1, wherein said second flow regulating valve comprises a three-way regulating valve.
8. A high efficiency heat recovery cascade fuel cell cogeneration system according to claim 1, wherein said external heat sink comprises tap water.
9. A cascade fuel cell cogeneration system with efficient heat recovery according to claim 1, wherein the electrical components of said fuel cell subsystem that require heat dissipation comprise a dc converter.
10. The high efficiency heat recovery cascade fuel cell cogeneration system of claim 1, wherein the electrical components of the fuel cell subsystem that require heat dissipation comprise an air compressor, an air compressor controller, and a hydrogen pump controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321725666.4U CN220209024U (en) | 2023-07-03 | 2023-07-03 | Cascade type fuel cell cogeneration system with high-efficiency heat recovery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321725666.4U CN220209024U (en) | 2023-07-03 | 2023-07-03 | Cascade type fuel cell cogeneration system with high-efficiency heat recovery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220209024U true CN220209024U (en) | 2023-12-19 |
Family
ID=89150961
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321725666.4U Active CN220209024U (en) | 2023-07-03 | 2023-07-03 | Cascade type fuel cell cogeneration system with high-efficiency heat recovery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220209024U (en) |
-
2023
- 2023-07-03 CN CN202321725666.4U patent/CN220209024U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109461952B (en) | Marine fuel cell cogeneration system | |
| CN105576269A (en) | Thermal control system of fixed mini-type fuel cell cogeneration device | |
| CN108134113B (en) | Reversible high-temperature SOFC thermoelectric energy intelligent control system and method | |
| CN113851670A (en) | Combined cooling heating and power method based on proton exchange membrane fuel cell | |
| CN109915219B (en) | Energy supply system and method integrating fuel cell and supercritical carbon dioxide solar thermal power generation | |
| WO2007114802A1 (en) | Method and apparatus for operating a fuel cell in combination with an absorption chiller | |
| CN113654233A (en) | Combined system and method of fuel cell and air energy water heater | |
| CN116960396B (en) | Hydrogen fuel cell power generation and heat supply system for chemical production and control method thereof | |
| CN113611894A (en) | Hydrogen fuel cell waste heat utilization system | |
| CN114039065A (en) | Fuel cell cogeneration system and control method | |
| CN220209024U (en) | Cascade type fuel cell cogeneration system with high-efficiency heat recovery | |
| KR101078964B1 (en) | fuel cell system | |
| CN114765266A (en) | SOFC (solid oxide fuel cell) combined heat and power system capable of improving heat efficiency and optimizing water management | |
| CN110739470B (en) | Fuel cell auxiliary system | |
| CN114046615B (en) | Hydrogen fuel cell and heat pump interconnection system | |
| CN213746958U (en) | City energy supply system | |
| CN113818046A (en) | Heat integration method and system for dynamic hydrogen production process | |
| US10804547B2 (en) | Power generation system and a method for operating the same | |
| CN112421073A (en) | Control system and method for rapidly increasing temperature of hydrogen energy automobile galvanic pile of fuel automobile | |
| CN220543961U (en) | Waste heat recovery system based on cogeneration of hydrogen fuel cells | |
| JP5586178B2 (en) | Fuel cell cogeneration system | |
| CN216120380U (en) | Hydrogen fuel cell waste heat utilization system | |
| CN219575682U (en) | Fuel cell cogeneration system | |
| CN216308059U (en) | Combined cooling, heating and power system for building based on proton exchange membrane fuel cell | |
| CN113394431B (en) | Thermal management system and method for improving utilization efficiency of green hydrogen energy system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |