CN219575682U - Fuel cell cogeneration system - Google Patents
Fuel cell cogeneration system Download PDFInfo
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- CN219575682U CN219575682U CN202320420919.0U CN202320420919U CN219575682U CN 219575682 U CN219575682 U CN 219575682U CN 202320420919 U CN202320420919 U CN 202320420919U CN 219575682 U CN219575682 U CN 219575682U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
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Abstract
The utility model provides a fuel cell cogeneration system, which comprises a fuel cell system and a heat recovery system, wherein the fuel cell system comprises a hydrogen supply system, an air supply system, a stack heat management system, a tail row system and at least one fuel cell stack; the heat recovery system comprises an external heat recovery system, wherein the external heat recovery system comprises a heat exchange medium circulation pipeline, a heat recovery main heat exchanger, a tail heat recovery heat exchanger, a circulating hydrogen heat recovery heat exchanger and a terminal heat exchanger, and the heat recovery main heat exchanger is arranged on the heat exchange medium circulation pipeline and a pile cooling liquid circulation pipeline of the pile heat management system at the same time; the tail heat extraction and recovery heat exchanger is arranged on the heat exchange medium circulation pipeline and a tail exhaust pipeline of the tail exhaust system at the same time; the circulating hydrogen heat recovery heat exchanger is arranged on the heat exchange medium circulating pipeline and the hydrogen circulating pipeline of the hydrogen supply system at the same time; the terminal heat exchanger is arranged on the heat exchange medium circulation pipeline; wherein the recycle hydrogen heat recovery heat exchanger is upstream of a gas-water separator of the hydrogen supply system in the hydrogen recycle line.
Description
Technical Field
The utility model relates to the technical field of fuel cells, in particular to a heat and power cogeneration system of a fuel cell.
Background
A fuel cell is a power generation device that converts chemical energy in fuel into electric energy through an electrochemical reaction, and is gradually widely used in various fields since it is not limited by carnot cycle.
Fuel cells, in particular Proton Exchange Membrane Fuel Cells (PEMFC), use hydrogen as fuel and oxygen as oxidant, wherein hydrogen atoms electrochemically react at the anode and lose electrons, which circulate through an external circuit, power the load and return to the cathode, and positively charged hydrogen ions can pass through the electrolyte (proton exchange membrane) to the cathode to combine with oxygen to form water. The process not only converts chemical energy into electric energy, but also generates heat, so that the fuel cell can continuously and normally work, irreversible damage to the proton exchange membrane caused by overhigh temperature is prevented, and heat of the fuel cell must be timely dissipated, for example, the air-cooled fuel cell dissipates heat by adopting a fan, and the water-cooled fuel cell takes away the heat by cooling liquid. When the fuel cell system is used in a power system, it is limited in size and weight, and the above heat cannot be comprehensively and effectively recycled, and this waste of heat is necessarily acceptable. Conversely, in certain applications where size and weight are not limited, such as in stationary power plants, it is necessary to fully and efficiently recycle the heat. Therefore, the technical focus of the cogeneration system of the fuel cell is one of the key focus directions in the field of fuel cells.
At present, the existing fuel cell cogeneration system focuses the power points on the heat recovery, for example, the application of the Chinese utility model with the application number of CN202111442348.2 discloses a technical scheme for comprehensively recovering the heat generated by a fuel cell, which divides circulating cooling water into three branches connected in parallel, and is respectively used for recovering the heat in a cooling liquid cavity of a fuel cell stack, the heat carried by air compressed by an air compressor and the heat carried by cathode tail gas of the fuel cell stack, and temporarily stores the total heat in a hot water buffer tank, and finally, the storage and the utilization of hot water are completed through a buffer water transfer pump and a hot water storage tank. Since the parallel branch circuit radiates and cools the fuel cell stack, and the parallel branch circuit radiates and cools the supplied air, the flow rate change of the cooling water of each branch circuit can affect each other during dynamic adjustment, which causes that the temperature of the fuel cell stack and the temperature and humidity of the supplied air are difficult to be commonly maintained in a proper range, thereby affecting the efficiency of the fuel cell and even shortening the service life of the fuel cell. Obviously, in the fuel cell cogeneration system, the power generation of the fuel cell system should be mainly used, the heat recovery of the heat recovery system should be used as an auxiliary, the heat management of the fuel cell stack and the temperature and humidity management of the air should not be negatively influenced for recovering the heat, and the service life of the fuel cell should not be influenced. That is, the heat recovery system should be configured to facilitate operation of the fuel cell system, or at least not interfere with the proper operation of the fuel cell system. In addition, existing fuel cell cogeneration systems recover heat entirely to the domestic water for use by the user, without regard to the possibility of the heat being used in the fuel cell system itself.
Disclosure of Invention
The main advantage of the present utility model is to provide a fuel cell cogeneration system comprising a fuel cell system and a heat recovery system, wherein the heat recovery system is capable of performing a comprehensive heat recovery without interfering with the normal operation of the fuel cell system, or at least without interfering with the proper operation of the fuel cell system.
Another advantage of the present utility model is to provide a fuel cell cogeneration system in which an external heat recovery system of the heat recovery system can achieve gradient heat recovery from low to high in temperature, improving heat recovery efficiency.
Another advantage of the present utility model is to provide a fuel cell cogeneration system wherein the internal heat recovery system of the heat recovery system is capable of recovering and applying heat to the fuel cell system itself.
Other advantages and features of the present utility model will become apparent from the following detailed description.
Accordingly, according to the present utility model, a fuel cell cogeneration system having at least one of the above-described advantages includes:
a fuel cell system, wherein the fuel cell system comprises a hydrogen gas supply system, an air supply system, a stack thermal management system, a tail row system, and at least one fuel cell stack; and
a heat recovery system, wherein the heat recovery system comprises an external heat recovery system, wherein the external heat recovery system comprises a heat exchange medium circulation line, a heat recovery main heat exchanger, a tail heat rejection heat exchanger, a recycle hydrogen heat exchanger, and a terminal heat exchanger, wherein,
the heat recovery main heat exchanger is arranged on the heat exchange medium circulation pipeline and the pile cooling liquid circulation pipeline of the pile heat management system at the same time; the tail heat extraction and recovery heat exchanger is arranged on the heat exchange medium circulation pipeline and a tail exhaust pipeline of the tail exhaust system at the same time; the circulating hydrogen heat recovery heat exchanger is arranged on the heat exchange medium circulating pipeline and the hydrogen circulating pipeline of the hydrogen supply system at the same time; the terminal heat exchanger is arranged on the heat exchange medium circulation pipeline; wherein the recycle hydrogen heat recovery heat exchanger is upstream of a gas-water separator of the hydrogen supply system in the hydrogen recycle line.
In one embodiment, the tail heat rejection heat exchanger is upstream of the heat recovery main heat exchanger in the heat exchange medium circulation line.
In one embodiment, the external heat recovery system further comprises a first flow adjustment mechanism disposed in the heat exchange medium circulation line for adjusting the flow rate of the heat exchange medium flowing through the circulating hydrogen heat recovery heat exchanger in the heat exchange medium circulation line.
In one embodiment, the external heat recovery system further comprises a second flow adjustment mechanism provided in the heat exchange medium circulation line for adjusting the flow rate of the heat exchange medium flowing through the heat recovery main heat exchanger in the heat exchange medium circulation line.
In one embodiment, the recycle hydrogen heat recovery heat exchanger is located in the heat exchange medium recycle line upstream of both the heat recovery main heat exchanger and the tail heat rejection heat exchanger.
In one embodiment, the heat recovery system further comprises an internal heat recovery system, wherein the internal heat recovery system comprises a first internal heat recovery heat exchanger, wherein the first internal heat recovery heat exchanger is disposed between the stack coolant circulation line of the stack heat management system and an air transfer line of the air supply system, wherein the air transfer line is connected between the fuel cell stack and an air outlet of a humidification tank of the air supply system.
In one embodiment, the internal heat recovery system further comprises a second internal heat recovery heat exchanger, wherein the second internal heat recovery heat exchanger is disposed at the stack coolant circulation line of the stack thermal management system and at the humidification water circulation line of the air supply system, wherein both ends of the humidification water circulation line are connected to the humidification tank.
In one embodiment, the first internal heat recovery heat exchanger is upstream of both the second internal heat recovery heat exchanger and the heat recovery main heat exchanger in the stack coolant circulation line.
In one embodiment, the second internal heat recovery heat exchanger is upstream of the heat recovery main heat exchanger in the stack coolant circulation line.
The foregoing and other advantages of the utility model will become more fully apparent from the following description and appended drawings.
The above and other advantages and features of the present utility model are readily apparent from the following detailed description of the utility model and the accompanying drawings.
Drawings
Fig. 1 is a schematic structural view of a fuel cell cogeneration system according to an embodiment of the utility model.
Detailed Description
The following description is presented to enable one of ordinary skill in the art to practice the utility model. Other obvious substitutions, modifications and changes will occur to one of ordinary skill in the art. Thus, the scope of the utility model should not be limited by the exemplary embodiments described herein.
It will be understood by those of ordinary skill in the art that the terms "a" or "an" should be understood as "at least one" or "one or more" unless specifically indicated herein, i.e., in one embodiment, the number of elements may be one, and in other embodiments, the number of elements may be multiple.
It will be appreciated by those of ordinary skill in the art that unless specifically indicated herein, the terms "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," etc., refer to an orientation or position based on that shown in the drawings, merely for convenience of description of the present utility model, and do not denote or imply that the devices or elements involved must have a particular orientation or position. Accordingly, the above terms should not be construed as limiting the present utility model.
Referring to fig. 1 of the drawings of the specification, a fuel cell cogeneration system according to an embodiment of the utility model is illustrated. The fuel cell cogeneration system comprises a fuel cell system 1 and a heat recovery system 2, wherein the fuel cell system 1 is used for enabling hydrogen and oxygen to undergo electrochemical reaction to convert chemical energy into electric energy to supply power outwards, and the heat recovery system 2 is used for recovering heat generated in the electrochemical reaction process. The fuel cell system 1 includes a hydrogen gas supply system 11, an air supply system 12, a stack thermal management system 13, a tail row system 14, and at least one fuel cell stack 10, wherein the hydrogen gas supply system 11 is configured to supply hydrogen gas to the fuel cell stack 10, and the air supply system 12 is configured to supply air to the fuel cell stack 10; the stack thermal management system 13 is configured to perform temperature management on the fuel cell stack 10, for example, to dissipate heat from the fuel cell stack 10 by using circulated stack cooling liquid, so that the temperature thereof can be maintained within a suitable temperature range; the tail gas discharging system 14 is mainly used for discharging the oxygen which is not completely reacted, the residual gas except the oxygen in the air and the water generated by the electrochemical reaction.
According to an embodiment of the present utility model, the heat recovery system 2 includes an external heat recovery system 21, wherein the external heat recovery system 21 includes a heat exchange medium circulation line 210, a heat recovery main heat exchanger 211, a tail heat rejection heat exchanger 212, a circulating hydrogen heat recovery heat exchanger 213, and a terminal heat exchanger 214, wherein the heat recovery main heat exchanger 211 is simultaneously disposed in the heat exchange medium circulation line 210 and the stack cooling liquid circulation line 130 of the stack heat management system 13, so that heat carried by the stack cooling liquid flowing in the stack cooling liquid circulation line 130 can be recovered to the heat exchange medium flowing in the heat exchange medium circulation line 210; the tail heat recovery heat exchanger 212 is disposed at both the heat exchange medium circulation line 210 and the tail line 140 of the tail system 14 so that heat carried by the fluid discharged through the tail system 14 can be recovered to the heat exchange medium flowing in the heat exchange medium circulation line 210; the circulating hydrogen heat recovery heat exchanger 213 is disposed in both the heat exchange medium circulation line 210 and the hydrogen circulation line 110 of the hydrogen supply system 11, so that heat carried by the hydrogen circulated through the hydrogen circulation line 110 can be partially recovered to the heat exchange medium flowing in the heat exchange medium circulation line 210; the terminal heat exchanger 214 is disposed in the heat exchange medium circulation line 210 so that heat recovered by the heat exchange medium can be transferred to water in the water storage device 200 for a user to use. Accordingly, the heat recovery process of the external heat recovery system 21 is realized, and the heat generated by the electrochemical reaction is comprehensively recovered.
Specifically, in the heat exchange medium circulation line 210 of the external heat recovery system 21, the upstream and downstream are defined by the flow direction and path of the heat exchange medium flowing in the heat exchange medium circulation line 210, and the tail heat recovery heat exchanger 212 is located upstream of the heat recovery main heat exchanger 211, so that the heat exchange medium can exchange heat with the fluid with a relatively low temperature discharged through the tail heat recovery system 14, and then exchange heat with the stack coolant with a relatively high temperature, thereby realizing gradient heat recovery from low temperature to high temperature and improving heat recovery efficiency.
It should be noted that, the application of the circulating hydrogen heat recovery heat exchanger 213 in the co-generation system of the fuel cell and the arrangement thereof at least simultaneously achieve the following two advantages, namely, the heat recovery of the co-generation system of the fuel cell is more comprehensive, the utilization rate of waste heat is improved, the temperature of the circulating hydrogen is reduced, the gaseous water carried by the circulating hydrogen is easier to condense, thereby enhancing the separation effect of the gas-water separator 111 of the hydrogen supply system 11, reducing the absolute humidity of the circulating hydrogen, avoiding the generation of liquid water when the circulating hydrogen and the newly supplied low-temperature hydrogen are mixed as much as possible, and further preventing the anode flooding of the fuel cell stack 10. In order to achieve the above-mentioned advantages, in the hydrogen circulation line 110 of the hydrogen supply system 11, the flow direction and path of the circulating hydrogen are defined as upstream and downstream, and the circulating hydrogen heat recovery heat exchanger 213 is located upstream of the gas-water separator 111, so that the circulating hydrogen can flow through the circulating hydrogen heat recovery heat exchanger 213 to be cooled, and then flow through the gas-water separator 111 to perform gas-water separation.
Further, the external heat recovery system 21 further includes a first flow adjusting mechanism 2101 disposed on the heat exchange medium circulation pipeline 210, where the first flow adjusting mechanism 2101 can adjust the flow of the heat exchange medium flowing through the circulating hydrogen heat recovery heat exchanger 213 in the heat exchange medium circulation pipeline 210, so that the heat recovery amount of the circulating hydrogen heat recovery heat exchanger 213 is controllable, so as to cool the circulating hydrogen to a suitable temperature, thereby realizing temperature regulation and control of the circulating hydrogen. It will be appreciated that the first flow regulating mechanism 2101 shown in the drawings of the present utility model includes a three-way valve and a parallel bypass, which are provided by way of illustration only and not to be construed as limiting the scope of the utility model, and that other embodiments of the first flow regulating mechanism 2101, such as including more than two mutually cooperating adjustable valves and at least one parallel bypass, or any manner of achieving flow control by cooperating adjustable valves via parallel bypasses, are contemplated as alternative embodiments of the present utility model.
In order to maximize the temperature regulation range of the recycle hydrogen heat recovery heat exchanger 213 for recycle hydrogen, it is preferable that the recycle hydrogen heat recovery heat exchanger 213 is located upstream of the heat recovery main heat exchanger 211 and the tail heat recovery heat exchanger 212 in the heat exchange medium circulation pipeline 210 at the same time, so that the heat exchange medium enters the recycle hydrogen heat recovery heat exchanger 213 before being heated by the heat recovery main heat exchanger 211 and the tail heat recovery heat exchanger 212, so as to increase the upper limit of the heat exchange amount of the recycle hydrogen heat recovery heat exchanger 213, that is, enable the recycle hydrogen to be cooled to a lower temperature, expand the adjustable temperature range, and regulate the flow of the heat exchange medium flowing into the recycle hydrogen heat recovery heat exchanger 213 by the first flow regulating mechanism 2101, thereby realizing the temperature regulation of the recycle hydrogen.
Further, the external heat recovery system 21 further includes a second flow adjustment mechanism 2102 disposed in the heat exchange medium circulation pipeline 210, where the second flow adjustment mechanism 2102 can adjust the flow of the heat exchange medium flowing through the heat recovery main heat exchanger 211 in the heat exchange medium circulation pipeline 210, so that the heat recovery amount of the heat recovery main heat exchanger 211 is controllable, so as to cool the stack cooling liquid to a suitable temperature, thereby realizing temperature adjustment of the stack cooling liquid, and eliminating the need for additional heating or additional heat dissipation of the heater after the stack cooling liquid flows out of the heat recovery main heat exchanger 211, so as to realize reasonable heat recovery, and avoid excessive heat recovery or insufficient heat recovery. It will be appreciated that the second flow adjustment mechanism 2102 depicted in the present figures includes a three-way valve and a parallel bypass, which are only illustrative and not intended to limit the scope of the present utility model, and that other embodiments of the second flow adjustment mechanism 2102, such as including more than two mutually-engaged adjustable valves and at least one parallel bypass, or any manner of achieving flow control by engaging adjustable valves via parallel bypasses, are contemplated as alternative embodiments of the present utility model.
Since the heat recovery main heat exchanger 211 and the recycle hydrogen heat recovery heat exchanger 213 are disposed in the heat exchange medium circulation line 210 in series, when the flow rates of the heat exchange medium flowing through the heat recovery main heat exchanger 211 and the recycle hydrogen heat recovery heat exchanger 213 are respectively adjusted, both are adjusted downward on the premise of the same total flow rate, and do not affect or interfere with each other. Therefore, the external heat recovery system 21 can perform temperature control on the circulating hydrogen and the stack coolant in a heat recovery manner through the circulating hydrogen heat recovery heat exchanger 213 and the heat recovery main heat exchanger 211, respectively, and the control processes of the two do not affect or interfere with each other. In summary, the external heat recovery system 21 can perform heat recovery on the premise that the temperature of the stack coolant, the temperature and the humidity of the circulated hydrogen gas are adjusted to the optimum state, thereby avoiding excessive or insufficient heat recovery.
In particular, the heat recovery system 2 further comprises an internal heat recovery system 22, wherein the internal heat recovery system 22 is capable of recovering and applying heat to the fuel cell system 1 itself, in particular to the air supply system 12 of the fuel cell system 1. The internal heat recovery system 22 comprises a first internal heat recovery heat exchanger 221, wherein the first internal heat recovery heat exchanger 221 is arranged between the stack coolant circulation line 130 of the stack thermal management system 13 and the air transfer line 120 of the air supply system 12, wherein the air transfer line 120 is connected between the fuel cell stack 10 and the air outlet of the humidification tank 121 of the air supply system 12 for transferring humidified air to the fuel cell stack 10. As will be appreciated by those skilled in the art, after air is supplied to the humidification tank 121 of the air supply system 12, it is humidified to saturation in the humidification tank 121, such as by bubbling humidification and/or spraying humidification, etc., and is preheated to a preheating temperature by the humidification water in the humidification tank 121, so that the air flowing into the air delivery line 120 from the air outlet of the humidification tank 121 is saturated humid air having a temperature reaching the preheating temperature, and then the saturated humid air having the preheating temperature is further heated to a set temperature by passing through the first internal heat recovery heat exchanger 221 while its relative humidity is changed to the set relative humidity as its temperature is changed, thereby enabling the temperature and humidity of the air supplied to the fuel cell stack 10 to be commonly regulated to a suitable range. Accordingly, the first internal heat recovery heat exchanger 221 of the internal heat recovery system 22 can recover heat carried by the stack cooling liquid flowing in the stack cooling liquid circulation line 130 and use the heat for heating the saturated humid air flowing in the air transfer line 120.
Further, the internal heat recovery system 22 further includes a second internal heat recovery heat exchanger 222, wherein the second internal heat recovery heat exchanger 222 is provided at the stack cooling liquid circulation line 130 of the stack thermal management system 13 and the humidification water circulation line 122 of the air supply system 12, wherein both ends of the humidification water circulation line 122 are connected to the humidification tank 121 for circulating the humidification water within the humidification tank 121. It will be appreciated by those skilled in the art that in order for air to be preheated to the preheat temperature by the humidification water, the temperature of the humidification water should be maintained at not less than the preheat temperature. Accordingly, the second internal heat recovery heat exchanger 222 of the internal heat recovery system 22 can recover heat carried by the stack cooling liquid flowing in the stack cooling liquid circulation line 130 and use the heat for heating the humidification water flowing in the humidification water circulation line 122.
Specifically, in the stack cooling liquid circulation line 130 of the stack heat management system 13, the first internal heat recovery heat exchanger 221 is located upstream of the second internal heat recovery heat exchanger 222 and the heat recovery main heat exchanger 211 at the same time, so as to raise the upper limit of the heat exchange amount of the first internal heat recovery heat exchanger 221, that is, to enable the saturated humid air in the air transmission line 120 to be heated to a higher temperature, and to expand the adjustable temperature range, as the flow direction and path of the stack cooling liquid flowing in the stack cooling liquid circulation line 130 are defined upstream and downstream. In addition, the second internal heat recovery heat exchanger 222 is located upstream of the heat recovery main heat exchanger 211 in the stack coolant circulation line 130, so that heat carried by the stack coolant flowing in the stack coolant circulation line 130 can be recovered to the air supply system 12 first and then recovered by the external heat recovery system 21, thereby enabling the recovered heat to be utilized in time so as not to be wasted.
In general, the fuel cell cogeneration system of the utility model aims to preferentially ensure that the fuel cell system can be in proper operation conditions, such as the temperature and relative humidity of air, the temperature and absolute humidity of circulated hydrogen and/or the temperature of stack cooling liquid, and the like, and then fully and effectively perform heat recovery, namely mainly ensuring the power generation efficiency of the fuel cell system and the service life of the fuel cell stack, rather than blindly pursuing to recover more heat.
It is noted that the first and second are used herein only to name and distinguish between different components (or elements) of the present utility model, which themselves do not have a somewhat sequential or numerical meaning.
It will be appreciated by persons skilled in the art that the embodiments described above and shown in the drawings are only for the purpose of illustrating the utility model and are not to be construed as limiting the utility model. All equivalent implementations, modifications and improvements within the spirit of the present utility model are intended to be included within the scope of the present utility model.
Claims (10)
1. A fuel cell cogeneration system, comprising:
a fuel cell system, wherein the fuel cell system comprises a hydrogen gas supply system, an air supply system, a stack thermal management system, a tail row system, and at least one fuel cell stack; and
a heat recovery system, wherein the heat recovery system comprises an external heat recovery system, wherein the external heat recovery system comprises a heat exchange medium circulation line, a heat recovery main heat exchanger, a tail heat rejection heat exchanger, a recycle hydrogen heat exchanger, and a terminal heat exchanger, wherein,
the heat recovery main heat exchanger is arranged on the heat exchange medium circulation pipeline and the pile cooling liquid circulation pipeline of the pile heat management system at the same time; the tail heat extraction and recovery heat exchanger is arranged on the heat exchange medium circulation pipeline and a tail exhaust pipeline of the tail exhaust system at the same time; the circulating hydrogen heat recovery heat exchanger is arranged on the heat exchange medium circulating pipeline and the hydrogen circulating pipeline of the hydrogen supply system at the same time; the terminal heat exchanger is arranged on the heat exchange medium circulation pipeline; wherein the recycle hydrogen heat recovery heat exchanger is upstream of a gas-water separator of the hydrogen supply system in the hydrogen recycle line.
2. The fuel cell cogeneration system of claim 1, wherein said tail heat rejection heat exchanger is upstream of said heat recovery main heat exchanger in said heat exchange medium circulation line.
3. The fuel cell cogeneration system of claim 2, wherein the external heat recovery system further comprises a first flow adjustment mechanism disposed in the heat exchange medium circulation line for adjusting the flow of heat exchange medium in the heat exchange medium circulation line through the circulating hydrogen heat recovery heat exchanger.
4. A fuel cell cogeneration system according to claim 3, wherein said external heat recovery system further comprises a second flow adjustment mechanism disposed in said heat exchange medium circulation line for adjusting the flow of heat exchange medium in said heat exchange medium circulation line through said heat recovery main heat exchanger.
5. The fuel cell cogeneration system of any one of claims 1 to 4, wherein the circulating hydrogen heat recovery heat exchanger is located in the heat exchange medium circulation line upstream of both the heat recovery main heat exchanger and the tail heat rejection heat exchanger.
6. The fuel cell cogeneration system of any one of claims 1 to 4, wherein the heat recovery system further comprises an internal heat recovery system, wherein the internal heat recovery system comprises a first internal heat recovery heat exchanger, wherein the first internal heat recovery heat exchanger is disposed between the stack coolant circulation line of the stack heat management system and an air transfer line of the air supply system, wherein the air transfer line is connected between the fuel cell stack and an air outlet of a humidification tank of the air supply system.
7. The fuel cell cogeneration system of claim 6, wherein the internal heat recovery system further comprises a second internal heat recovery heat exchanger, wherein the second internal heat recovery heat exchanger is disposed at both ends of the stack coolant circulation line of the stack heat management system and the humidification water circulation line of the air supply system, wherein both ends of the humidification water circulation line are connected to the humidification tank.
8. The fuel cell cogeneration system of claim 7, wherein the first internal heat recovery heat exchanger is upstream of both the second internal heat recovery heat exchanger and the heat recovery main heat exchanger in the stack coolant circulation line.
9. The fuel cell cogeneration system of claim 8, wherein said second internal heat recovery heat exchanger is upstream of said heat recovery main heat exchanger in said stack coolant circulation line.
10. The fuel cell cogeneration system of claim 9, wherein the circulating hydrogen heat recovery heat exchanger is located in the heat exchange medium circulation line upstream of both the heat recovery main heat exchanger and the tail heat rejection heat exchanger.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202320420919.0U CN219575682U (en) | 2023-03-07 | 2023-03-07 | Fuel cell cogeneration system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202320420919.0U CN219575682U (en) | 2023-03-07 | 2023-03-07 | Fuel cell cogeneration system |
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| CN219575682U true CN219575682U (en) | 2023-08-22 |
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| CN202320420919.0U Active CN219575682U (en) | 2023-03-07 | 2023-03-07 | Fuel cell cogeneration system |
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