Hydrogen energy storage cogeneration system

Abstract

The invention relates to a hydrogen energy storage cogeneration system. The hydrogen energy storage heat and power cogeneration system comprises a hydrogen storage tank, a hydrogen storage tank and a heat pump, wherein the hydrogen storage tank comprises a hydrogen inlet and a hydrogen outlet; the electrolytic bath device is communicated with the hydrogen inlet; the fuel cell device is communicated with the hydrogen outlet; the hot water tank comprises a first inlet, a second inlet and a first outlet, the first inlet is communicated with the fuel cell device, and the second inlet is communicated with the electrolytic cell device; the cold water tank comprises a third inlet, a second outlet and a third outlet, the second outlet is communicated with the fuel cell device, and the third outlet is communicated with the electrolytic cell device; hot water from the first outlet flows back to the third inlet after passing through the heat exchanger, and the heat exchanger is used for exchanging heat with heat supply load equipment.

Description

Technical Field

[0001] The present application relates to the field of hydrogen production technology, and in particular to a hydrogen energy storage cogeneration system. Background Art

[0002] Hydrogen energy storage first produces hydrogen through the electrolysis of water, then stores the hydrogen, and generates electricity through hydrogen-oxygen fuel cells when electricity is needed, thus realizing energy storage and transfer. At present, the heat generated by the operation of the electrolyzer in the hydrogen charging state and the heat generated by the operation of the fuel cell in the hydrogen discharge state are dissipated and not effectively recycled. Summary of the invention

[0003] The present application provides a hydrogen energy storage cogeneration system to address the deficiencies in the related art.

[0004] According to a first aspect of an embodiment of the present application, a hydrogen energy storage cogeneration system is provided, comprising:

[0005] A hydrogen storage tank, the hydrogen storage tank comprising a hydrogen inlet and a hydrogen outlet;

[0006] an electrolyzer device, the electrolyzer device being connected to the hydrogen inlet;

[0007] A fuel cell device, the fuel cell device being connected to the hydrogen outlet;

[0008] A hot water tank, the hot water tank comprising a first inlet, a second inlet and a first outlet, the first inlet being connected to the fuel cell device, and the second inlet being connected to the electrolyzer device;

[0009] A cold water tank, the cold water tank comprising a third inlet, a second outlet and a third outlet, the second outlet being connected to the fuel cell device, and the third outlet being connected to the electrolyzer device;

[0010] A heat exchanger, wherein the hot water from the first outlet flows back to the third inlet after passing through the heat exchanger, and the heat exchanger is used for heat exchange with a heating load device.

[0011] Optionally, the heat exchanger includes a water source heat pump, which includes an evaporator end and a condenser end. The hot water from the first outlet is cooled by the evaporator and then flows back to the third inlet. The condenser end is used to heat the stored liquid and exchange heat with the heating load equipment.

[0012] Optionally, the hot water tank includes a fourth outlet, the fourth outlet is connected to the fuel cell device, and the hot water from the fourth outlet is used to keep the fuel cell device warm or preheat it.

[0013] Optionally, the cold water tank includes a fourth inlet connected to the fuel cell device, and the cold water in the fuel cell device is recovered to the cold water tank through the fourth inlet.

[0014] Optionally, the hot water tank includes a fifth outlet, the fifth outlet is connected to the electrolytic cell device, and the hot water from the fifth outlet is used to keep the electrolytic cell device warm or preheat it.

[0015] Optionally, the cold water tank includes a fifth inlet connected to the fuel cell device, and the cold water in the fuel cell device is recovered to the cold water tank through the fifth inlet.

[0016] Optionally, a heating component is also included;

[0017] The cold water tank includes a sixth outlet, the hot water tank includes a sixth inlet, the heating component is connected in series between the sixth outlet and the sixth inlet, and the heating component is used to heat the cold water from the sixth outlet and then pass it into the sixth inlet.

[0018] Optionally, the heating component includes an air source heat pump.

[0019] Optionally, the fuel cell device and the electrolyzer device are in a non-operating state, the fuel cell device is disconnected from the water path between the hot water tank and the cold water tank, and the electrolyzer device is disconnected from the water path between the hot water tank and the cold water tank.

[0020] Optionally, the water paths between the hot water tank and the water source heat pump, between the water source heat pump and the cold water tank, between the cold water tank and the heating component, and between the heating component and the hot water tank are all connected.

[0021] The technical solution provided by the embodiments of the present application may have the following beneficial effects:

[0022] It can be seen from the above embodiments that the hydrogen energy storage cogeneration system in the present application utilizes hot water tanks and cold water tanks to recover and allocate waste heat generated by the operation of the electrolyzer device and the fuel cell device, and utilizes a water source heat pump to improve the quality of thermal energy while outputting thermal energy to users, thereby improving resource utilization.

[0023] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0025] Figure 1It is a piping schematic diagram of a hydrogen energy storage cogeneration system according to an exemplary embodiment.

[0026] Figure 2 It is a piping schematic diagram of another hydrogen energy storage cogeneration system according to an exemplary embodiment.

[0027] Figure 3 It is a piping schematic diagram of another hydrogen energy storage cogeneration system according to an exemplary embodiment. DETAILED DESCRIPTION

[0028] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0029] The terms used in this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The singular forms of "a", "said" and "the" used in this application and the appended claims are also intended to include plural forms unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0030] It should be understood that although the terms first, second, third, etc. may be used in the present application to describe various information, these information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining".

[0031] Figure 1 is a structural schematic diagram of a hydrogen energy storage cogeneration system according to an exemplary embodiment. Figure 1 As shown, the hydrogen energy storage cogeneration system includes a hydrogen storage tank 1, an electrolyzer device 2 and a fuel cell device 3. The hydrogen storage tank 1 includes a hydrogen outlet and a hydrogen inlet. The hydrogen outlet is connected to the fuel cell device 3 to provide hydrogen for the power generation of the fuel cell device 3; the hydrogen inlet is connected to the electrolyzer device 2, so that the hydrogen obtained by electrolyzing water by the electrolyzer device 2 is stored in the hydrogen storage tank 1. Among them, the electrolyzer device 2 may include a battery stack and an accessory system. Figure 1The electrolyzer device can be an alkaline electrolyzer or a proton exchange membrane electrolyzer. The fuel cell device includes a stack, a hydrogen supply system, an air supply system, a water heat management system, etc. Figure 1 Represented as a whole.

[0032] Furthermore, the hydrogen energy storage cogeneration system further includes a hot water tank 4, a cold water tank 5 and a heat exchanger 6, wherein the hot water tank 4 includes a first inlet 41, a second inlet 42 and a first outlet 43, wherein the first inlet 41 is connected to the fuel cell device 3, and the second inlet 42 is connected to the electrolyzer device 2; the cold water tank 5 includes a third inlet 51, a second outlet 52 and a third outlet 53, wherein the second outlet 52 is connected to the fuel cell device 3, and the third outlet 53 is connected to the electrolyzer device 2. The hot water from the first outlet 43 flows back to the third inlet 51 after passing through the heat exchanger, and the heat exchanger 6 can be used for heat exchange with the heating load equipment, for example, it can be applied to some domestic hot water application scenarios, such as heating water supply.

[0033] However, since the heat that can be generated by the electrolyzer device 2 and the fuel cell device 3 is limited, the temperature that can be heated by the waste heat is limited, so the application for some hot water scenes is limited. In some embodiments, the heat exchanger 6 may include a water source heat pump, which includes an evaporator end and a condenser end. The hot water from the first outlet 43 is cooled by the evaporator and then flows back to the third inlet 51. The heat of the hot water from the first outlet 43 is transferred to the liquid stored at the condenser end through the water source heat pump circulation to heat it. Moreover, the condenser end is also used to heat the stored liquid and heat exchange with the heating load equipment. The improvement of the quality of thermal energy by the water source heat pump can achieve higher temperature heating. With the different selection of compressors, it can meet the needs of 80 to 120 ° C on the user side, and can be used in food, printing and dyeing, pharmaceuticals, chemicals, etc. Compared with only exchanging heat between the hot water from the first outlet 43 and the heating load equipment, which can only be used in limited scenes such as daily heating and domestic water, the application scenarios of the hydrogen energy storage cogeneration system in this application can be greatly expanded.

[0034] In this arrangement, when the electrolytic cell device 2 is in working condition, the cold water in the cold water tank 5 can flow into the electrolytic cell device 2 through the third outlet 53, and the electrolytic cell device 2 is cooled by the cold water. At the same time, the heated hot water can flow back to the hot water tank 4 through the second inlet 42. The hot water in the hot water tank 4 can be heat exchanged with the heating load equipment through the water source heat pump, thereby realizing the heat generation reuse during the working process of the electrolytic cell device 2 and improving resource utilization.

[0035] The hydrogen energy storage cogeneration system in the present application utilizes a hot water tank 4 and a cold water tank 5 to recover and allocate waste heat generated by the operation of the electrolyzer device 2 and the fuel cell device 3, and utilizes a water source heat pump to improve the quality of thermal energy while outputting thermal energy to users, thereby improving resource utilization.

[0036] Similarly, when the fuel cell device 3 is in working state, the cold water in the cold water tank 5 can flow into the fuel cell device 3 through the second outlet 52, and the fuel cell device 3 is cooled by the cold water. At the same time, the heated hot water can flow back to the hot water tank 4 through the first inlet 41. The hot water in the hot water tank 4 can be heat exchanged with the heating load equipment through the water source heat pump, thereby realizing the heat generation reuse during the working process of the fuel cell device 3 and improving resource utilization.

[0037] It should be noted that the cold water and hot water described in the above embodiments are only used to illustrate that there is a temperature difference between the two, such as water at 35°C is cold water and water at 43°C is hot water, or water at 43°C is cold water and water at 47°C is hot water. In some embodiments, the hot water in the hot water tank 4 can be between 37°C and 45°C, and the cold water in the cold water tank 5 can be between 30°C and 35°C.

[0038] In some embodiments, Figure 2 As shown, the hot water tank 4 also includes a fourth outlet 44, which is connected to the fuel cell device 3, and the hot water from the fourth outlet 44 is used to keep the fuel cell device warm or preheat. For example, during the operation of the electrolyzer device 2, the fuel cell device 3 needs to be kept warm, so that the subsequent start of the fuel cell device 3 is smoother. Therefore, after the hot water heated during the operation of the electrolyzer device 2 enters the hot water tank 4 through the second inlet 42, it can flow to the fuel cell device 3 through the fourth outlet 44 to keep the fuel cell device 3 warm; or in other cases, such as when the fuel cell device 3 is cold started, that is, when the fuel cell device 3 is started under some low temperature conditions, the hot water can be first introduced into the fuel cell device 3 through the fourth outlet 44 before starting to preheat the fuel cell device 3. In this way, the waste heat generated during the operation of the electrolyzer device 2 and the fuel cell device 3 can be further utilized. Furthermore, the cold water tank 5 includes a fourth inlet 54 connected to the fuel cell device 3 , through which the cold water in the fuel cell device 3 is recovered to the cold water tank 5 , thereby forming a water circuit circulation without the need for manual water reduction operation for the fuel cell device 3 .

[0039] In some other embodiments, Figure 2As shown, the hot water tank 4 also includes a fifth outlet 45, which is connected to the electrolyzer device 2, and the hot water from the fifth outlet 45 is used to keep the electrolyzer device 2 warm or preheat. For example, during the operation of the fuel cell device 3, the electrolyzer device 2 needs to be kept warm, so that the subsequent start of the electrolyzer device 2 is smoother. Therefore, after the hot water heated during the operation of the fuel cell device 3 enters the hot water tank 4 through the first inlet 41, it can flow to the electrolyzer device 2 through the fifth outlet 45 to keep the electrolyzer device 2 warm; or in other cases, such as when the electrolyzer device 2 is cold started, that is, when the electrolyzer device 2 is started under some low temperature conditions, the hot water can be first introduced into the electrolyzer device 2 through the fifth outlet 45 before starting, so as to preheat the electrolyzer device 2. In this way, the waste heat generated during the operation of the fuel cell device 3 and the electrolyzer device 2 can be further utilized. Furthermore, the cold water tank 5 includes a fifth inlet 55 connected to the electrolytic cell device 2 , and the cold water in the electrolytic cell device 2 is recovered to the cold water tank 5 through the fifth inlet 55 , thereby forming a water circuit circulation without the need for manual water reduction operation for the electrolytic cell device 2 .

[0040] In some other embodiments, Figure 3 As shown, the cold water tank 5 also includes a sixth outlet 56, the hot water tank 4 includes a sixth inlet 46, and the hydrogen energy storage and cogeneration system also includes a heating component 8, which is connected in series between the sixth outlet 56 and the sixth inlet 46. The cold water from the sixth outlet 56 is heated by the heating component 8 and then passed into the sixth inlet 46, and then refluxed into the hot water tank 4, so that the water path between the hot water tank 4 and the cold water tank 5 can be connected. Moreover, through the connection between the hot water tank 4 and the cold water tank 5 in this application, when the heat demand of the heating load equipment is large and the heat generated by the operation of the electrolyzer device 2 or the fuel cell device 3 is insufficient, hot water can be supplemented through the loop between the hot water tank 4-water source heat pump-cold water tank 5-heating component 8. Among them, the heating component 8 can include an air source heat pump. The air source heat pump can include four parts: an evaporator, a compressor, a condenser, and an expansion valve. The flow rate of the working fluid can be adjusted by the compressor frequency to control the heating amount of the heat pump.

[0041] Further, when the fuel cell device 3 and the electrolyzer device 2 are in a non-operating state, the water paths between the fuel cell device 3 and the hot water tank 4 and the cold water tank 5 are disconnected, and the water paths between the electrolyzer device 2 and the hot water tank 4 and the cold water tank 5 are disconnected. The adjustment is specifically performed by a valve or other flow control element. Further, when the fuel cell device 3 and the electrolyzer device 2 are in a non-operating state, the water paths between the hot water tank 4 and the water source heat pump, between the water source heat pump and the cold water tank 5, between the cold water tank 5 and the heating assembly 8, and between the heating assembly 8 and the hot water tank 4 are all connected. At this time, in the entire hydrogen energy storage cogeneration system, the water path between the hot water tank 4 and the cold water tank 5 can be connected through the air source heat pump, and the hot water in the hot water tank 4 can be used to heat the heating load equipment through the water source heat pump. That is, the heat supply of the hydrogen energy storage cogeneration system does not depend on the working heat generation of the fuel cell device 3 and the electrolyzer device 2. The above-mentioned circuit can provide heat when the fuel cell device 3 and the electrolyzer device 2 are in a non-working state, thereby increasing the application scenarios of the hydrogen energy storage cogeneration system.

[0042] In order to control the temperature of each link and maintain the normal operation of the electrolyzer device 2, the hydrogen storage tank and the fuel cell device 3, the flow of the cold water circuit, the hot water circuit and the heat pump circuit can be adjusted to control the heat exchange amount at each point in the circuit and the heating amount of the heat pump. Among them, the cold water circuit refers to the circuit of the liquid with relatively low circulation temperature; the hot water circuit refers to the circuit of the liquid with relatively high circulation temperature.

[0043] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the disclosure disclosed herein. The present application is intended to cover any modification, use or adaptation of the present application, which follows the general principles of the present application and includes common knowledge or customary techniques in the art that are not disclosed in the present application. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present application are indicated by the following claims.

[0044] It should be understood that the present application is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A hydrogen energy storage cogeneration system, characterized in that: include: A hydrogen storage tank, the hydrogen storage tank comprising a hydrogen inlet and a hydrogen outlet; an electrolyzer device, the electrolyzer device being connected to the hydrogen inlet; A fuel cell device, the fuel cell device being connected to the hydrogen outlet; A hot water tank, the hot water tank comprising a first inlet, a second inlet and a first outlet, the first inlet being connected to the fuel cell device, and the second inlet being connected to the electrolyzer device; A cold water tank, the cold water tank comprising a third inlet, a second outlet and a third outlet, the second outlet being connected to the fuel cell device, and the third outlet being connected to the electrolyzer device; A heat exchanger, wherein the hot water from the first outlet flows back to the third inlet after passing through the heat exchanger, and the heat exchanger is used for heat exchange with a heating load device.

2. The hydrogen energy storage cogeneration system according to claim 1, characterized in that: The heat exchanger includes a water source heat pump, which includes an evaporator end and a condenser end. The hot water from the first outlet is cooled by the evaporator and then flows back to the third inlet. The condenser end is used to heat the stored liquid and exchange heat with the heating load equipment.

3. The hydrogen energy storage cogeneration system according to claim 1, characterized in that: The hot water tank comprises a fourth outlet, the fourth outlet is in communication with the fuel cell device, and the hot water from the fourth outlet is used to keep the fuel cell device warm or preheat it.

4. The hydrogen energy storage cogeneration system according to claim 3, characterized in that: The cold water tank includes a fourth inlet connected to the fuel cell device, and the cold water in the fuel cell device is recovered to the cold water tank through the fourth inlet.

5. The hydrogen energy storage cogeneration system according to claim 1, characterized in that: The hot water tank comprises a fifth outlet, the fifth outlet is in communication with the electrolytic cell device, and the hot water from the fifth outlet is used to keep the electrolytic cell device warm or preheat it.

6. The hydrogen energy storage cogeneration system according to claim 5, characterized in that: The cold water tank includes a fifth inlet communicated with the fuel cell device, and cold water in the fuel cell device is recovered to the cold water tank through the fifth inlet.

7. The hydrogen energy storage cogeneration system according to claim 2, characterized in that: Also included is a heating assembly; The cold water tank includes a sixth outlet, the hot water tank includes a sixth inlet, the heating component is connected in series between the sixth outlet and the sixth inlet, and the heating component is used to heat the cold water from the sixth outlet and then pass it into the sixth inlet.

8. The hydrogen energy storage cogeneration system according to claim 7, characterized in that: The heating assembly includes an air source heat pump.

9. The hydrogen energy storage cogeneration system according to claim 7, characterized in that: The fuel cell device and the electrolyzer device are in a non-operating state, the fuel cell device is disconnected from the water path between the hot water tank and the cold water tank, and the electrolyzer device is disconnected from the water path between the hot water tank and the cold water tank.

10. The hydrogen energy storage cogeneration system according to claim 9, characterized in that: The water paths between the hot water tank and the water source heat pump, between the water source heat pump and the cold water tank, between the cold water tank and the heating component, and between the heating component and the hot water tank are all connected.

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