Heat recovery system
By designing a heat recovery system, the waste heat generated by fuel cells and electrical equipment is recycled and utilized, which solves the problems of electricity consumption and energy waste in the electric heating of hydrogen storage tanks, and improves the energy utilization and stability of the fuel cell system.
Patent Information
- Application Number
- CN202420418775.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-05
- Publication Date
- 2025-03-07
- Estimated Expiration
- 2034-03-05
AI Technical Summary
In fuel cell systems, hydrogen storage tanks need to be electrically heated to maintain a stable hydrogen discharge, resulting in a large amount of electricity consumption, and the waste heat generated by fuel cells and electrical equipment cannot be effectively recovered, resulting in a decrease in energy utilization.
A heat recovery system is designed to transport the waste heat generated by fuel cells and electrical equipment to the hydrogen storage tank through the heat recovery pipeline to achieve heat recovery and utilization. The system includes a first heat recovery pipeline to heat the hydrogen storage tank to the waste heat of the electrical equipment, and a second heat recovery pipeline to heat the hydrogen storage tank to the waste heat of the electric pile, and control it through the cold water inlet and the waste heat discharge pipeline.
Through the implementation of the heat recovery system, the energy utilization rate of the fuel cell system is improved, the stability of the system is improved, and the precise control of the hydrogen storage tank is achieved, ensuring the stability of the hydrogen gas source.
Smart Images
Figure CN222581192U_ABST
Abstract
Description
Technical Field
[0001] The present disclosure relates to the technical field of waste heat recovery, and in particular to a heat recovery system. Background Art
[0002] A fuel cell is an electrochemical power generation device that directly converts chemical energy into electrical energy. It has high energy conversion efficiency and is pollution-free and noise-free. It is becoming an ideal new generation of energy utilization.
[0003] In actual applications, in order to keep the hydrogen storage tank releasing hydrogen continuously, the hydrogen storage tank needs to be electrically heated to keep the hydrogen storage tank releasing a stable amount of hydrogen, which consumes a lot of electricity. Fuel cells and electrical equipment generate a lot of waste heat during operation, and most of this waste heat is directly released into the air, causing a lot of energy to be wasted and resulting in reduced energy utilization. Utility Model Content
[0004] The purpose of this disclosure is to provide a heat recovery system to solve the technical problems in the related art. The specific solution is as follows:
[0005] The embodiment of the present disclosure provides a heat recovery system, comprising: a power supply module, comprising a hydrogen storage tank and a fuel cell stack, the hydrogen storage tank being used to provide hydrogen to the fuel cell stack; electrical equipment, connected to the power supply module, and used to operate under the action of the power supply module; a heat recovery pipeline, connecting the electrical equipment and the fuel cell stack with the hydrogen storage tank, and used to transport the waste heat of the electrical equipment and the fuel cell stack to the hydrogen storage tank.
[0006] In some embodiments, the heat recovery pipeline includes: a first heat recovery pipeline, which connects the electrical equipment and is wound around the hydrogen storage tank to transport waste heat from the electrical equipment to heat the hydrogen storage tank.
[0007] In some embodiments, the heat recovery pipeline also includes: a second heat recovery pipeline, which is arranged in parallel with the power supply module to transport the waste heat of the fuel cell stack to heat the hydrogen storage tank.
[0008] In some embodiments, one end of the second heat recovery pipeline is in communication with the first heat recovery pipeline.
[0009] In some embodiments, the heat recovery system further includes: a cold water inlet for providing cold water to the fuel cell stack and the electrical equipment respectively, wherein the first heat recovery pipeline is connected to the cold water inlet.
[0010] In some embodiments, the heat recovery system further includes: a waste heat discharge pipeline connected to the first heat recovery pipeline, for providing the waste heat of the first heat recovery pipeline to other heat-using equipment.
[0011] In some embodiments, the first heat recovery pipeline further includes: a solenoid valve, disposed between the hydrogen storage tank and the waste heat recovery pipeline, for controlling the connection and disconnection of the first heat recovery pipeline and the hydrogen storage tank.
[0012] In some embodiments, the heat recovery system further includes: a temperature control module connected to the hydrogen storage tank and used to control the temperature of the hydrogen storage tank.
[0013] In some embodiments, the power supply module further includes: an ejector, disposed between the hydrogen storage tank and the fuel cell stack, for receiving and / or transporting hydrogen.
[0014] In some embodiments, the heat recovery system further includes: a control module, disposed between the power supply module and the electrical device, for adjusting the voltage output by the power supply module to a voltage suitable for the electrical device.
[0015] Compared with the related art, the above solution of the embodiment of the present disclosure has at least the following beneficial effects:
[0016] The heat recovery system provided by the present disclosure includes a heat recovery pipeline, which can take out the heat generated by the battery stack and the electrical equipment and transport it to the hydrogen storage tank. Through the setting of the heat recovery pipeline, the heat generated by the battery stack and the electrical equipment can be recycled, which improves the energy utilization rate of the fuel cell, and at the same time improves the stability of the fuel cell, realizes the precise control of the hydrogen discharge temperature of the hydrogen storage tank, ensures the stability of the hydrogen gas source, and improves the stability of the system operation.
[0017] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] The drawings herein are incorporated into the specification and constitute a part of the specification, showing embodiments consistent with the present disclosure, and together with the specification, are used to explain the principles of the present disclosure. Obviously, the drawings described below are only some embodiments of the present disclosure, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:
[0019] Figure 1 It is a structural schematic diagram of a heat recovery system according to an exemplary embodiment.
[0020] Figure 2 It is a schematic structural diagram of another heat recovery system according to an exemplary embodiment. Description of the drawings:
[0022] A first heat recovery pipeline 100 , a second heat recovery pipeline 200 , and a residual heat recovery pipeline 300 . DETAILED DESCRIPTION
[0023] In order to make the purpose, technical solutions and advantages of the present disclosure clearer, the present disclosure will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.
[0024] The terms used in the embodiments of the present disclosure are only for the purpose of describing specific embodiments, and are not intended to limit the present disclosure. The singular forms "a", "said" and "the" used in the embodiments of the present disclosure and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings, and "multiple" generally includes at least two, and other quantifiers are similar.
[0025] It should be understood that, although the terms first, second, third, etc. may be used to describe in the disclosed embodiments, these descriptions should not be limited to these terms. These terms are only used to distinguish the described objects. For example, without departing from the scope of the disclosed embodiments, the first may also be referred to as the second, and similarly, the second may also be referred to as the first. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.
[0026] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship. The singular forms "a", "the" and "the" are also intended to include the plural forms, unless the context clearly indicates other meanings.
[0027] In the description of the present disclosure, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0028] It should also be noted that the term "includes", "comprising" or any other variation thereof is intended to cover non-exclusive inclusion, so that a commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprising a ..." do not exclude the existence of other identical elements in the commodity or device including the elements.
[0029] In the related art, in order to keep the hydrogen storage tank releasing hydrogen continuously, the hydrogen storage tank needs to be electrically heated to keep the hydrogen storage tank releasing hydrogen at a stable rate, which consumes a lot of electricity. Fuel cells and electrical equipment generate a lot of waste heat during operation, and most of this waste heat is directly released into the air, causing a lot of energy to be wasted, resulting in reduced energy utilization.
[0030] Therefore, the present disclosure provides a heat recovery system for recovering waste heat of electrical equipment and fuel cell, including: a power supply module, including a hydrogen storage tank and a fuel cell stack, the hydrogen storage tank is used to provide hydrogen to the fuel cell stack; electrical equipment, connected to the power supply module, and used to operate under the action of the power supply module; a heat recovery pipeline, connecting the electrical equipment and the fuel cell stack with the hydrogen storage tank, and used to transport the waste heat of the electrical equipment and the fuel cell stack to the hydrogen storage tank.
[0031] The heat recovery system provided by the present disclosure can effectively recover and utilize the heat generated by the fuel cell and the electrical equipment. The optional embodiments of the present disclosure are described in detail below in conjunction with the accompanying drawings.
[0032] An embodiment of the present disclosure provides a heat recovery system, including: a power supply module, an electrical device, and a heat recovery pipeline, wherein the heat recovery pipeline includes a first heat recovery pipeline 100 and a second heat recovery pipeline 200 .
[0033] The power supply module includes a hydrogen storage tank and a stack. The hydrogen storage tank has a preset temperature T0. At the preset temperature T0, the hydrogen storage tank can stably provide hydrogen to the stack to ensure the stable output of the fuel cell. The stack has a water inlet and a water outlet. The water inlet of the stack is used to connect to an external cold water inlet to cool the stack by external cold water. After the cold water enters the stack through the water inlet, it exchanges heat with the stack. Furthermore, the cold water is discharged from the stack through the water outlet.
[0034] In some embodiments, the power supply module further includes an ejector for receiving and / or delivering hydrogen.
[0035] Specifically, the ejector is arranged between the hydrogen storage tank and the fuel cell stack, and is used to provide the hydrogen in the hydrogen storage tank to the fuel cell stack. At the same time, the ejector can suck out the unreacted hydrogen in the fuel cell stack and reflux it, and then re-supply the unreacted hydrogen sucked out and refluxed with the hydrogen supplied by the hydrogen tank to ensure sufficient flow, achieve a higher anode stoichiometric ratio and anti-flooding effect.
[0036] Since the ejector has no moving parts, does not require lubrication, and has low vibration, the ejector has the advantages of stable transmission and low maintenance cost compared with the fuel cell hydrogen circulation pump used in the related art.
[0037] In some embodiments, Figure 1 As shown, the electrical equipment is connected to the power supply module and is used to operate under the action of the power supply module. A control module is also provided between the power supply module and the electrical equipment to provide an applicable voltage for the electrical equipment. Figure 2 As shown, the control module includes a controller, a battery and an inverter. The control module is connected in series with the battery stack and the electrical device so that the battery stack can stably supply power to the electrical device.
[0038] A plate heat exchanger is provided inside the electrical equipment, and the inlet and outlet ends of the plate heat exchanger are respectively connected to the cold water inlet and the first heat recovery pipeline 100. The cold water flows through the plate heat exchanger for heat exchange, brings out the heat generated in the electrical equipment, and is transported along the first heat recovery pipeline 100 toward the direction of the hydrogen storage tank.
[0039] In some embodiments, the first heat recovery pipeline 100 connects the electrical equipment with the hydrogen storage tank to transport the waste heat of the electrical equipment to the hydrogen storage tank. The first heat recovery pipeline 100 is wound around the hydrogen storage tank, and the extended end of the first heat recovery pipeline 100 is connected to the cold water inlet. When external cold water is released from the cold water inlet, the water circulating in the first heat recovery pipeline 100 can enter the plate heat exchanger of the battery stack or the electrical equipment together with the external cold water to cool the battery stack or the electrical equipment.
[0040] In some embodiments, the second heat recovery pipeline 200 is arranged in parallel with the power supply module, and the two ends of the second heat recovery pipeline 200 are respectively connected to the water outlet of the fuel cell stack and the first heat recovery pipeline 100, so as to transport the waste heat discharged from the fuel cell stack along the first heat recovery pipeline 100 to the hydrogen storage tank.
[0041] like Figure 1As shown, cold water flows through the first heat recovery pipeline 100 connected to the electrical equipment and the second heat recovery pipeline 200 connected to the stack, respectively cooling the electrical equipment and the stack, and the external cold water flows along the first heat recovery pipeline 100 and the second heat recovery pipeline 200 with the heat exchange heat to the direction of the hydrogen storage tank after heat exchange. Since the second heat recovery pipeline 200 is connected to the first heat recovery pipeline 100, and the first heat recovery pipeline 100 is wound around the hydrogen storage tank, the liquid in the second heat recovery pipeline 200 will be collected in the first heat recovery pipeline 100, and together with the liquid in the first heat recovery pipeline 100, heat the hydrogen storage tank, and further flow to the cold water inlet.
[0042] In some embodiments, the heat recovery system further includes a temperature control module, which is connected to the hydrogen storage tank and is used to control the temperature of the hydrogen storage tank so that the temperature of the hydrogen storage tank is maintained at a preset temperature T0 to ensure that the hydrogen storage tank releases hydrogen stably.
[0043] In some embodiments, the heat recovery system further includes: a waste heat discharge pipeline 300, which is connected to the first heat recovery pipeline 100 and is used to provide waste heat of the first heat recovery pipeline 100 to other heat-using equipment.
[0044] Specifically, a solenoid valve is provided on one side of the waste heat discharge pipeline 300 adjacent to the first heat recovery pipeline 100 for controlling the connection and disconnection between the first heat recovery pipeline 100 and the hydrogen storage tank.
[0045] In response to the detection result T1>T0 of the temperature control module, the solenoid valve is in the first working position, and the liquid in the first heat recovery pipeline 100 and the second heat recovery pipeline 200 flows to the residual heat discharge pipeline 300. At this time, the liquid in the first heat recovery pipeline 100 and the second heat recovery pipeline 200 does not heat the hydrogen storage tank. The liquid in the first heat recovery pipeline 100 flows to other heat-using equipment instead of flowing through the cold water inlet.
[0046] In response to the detection result T1≤T0 of the temperature control module, the solenoid valve is in the second working position, and the liquid in the first heat recovery pipeline 100 and the second heat recovery pipeline 200 flows to the cold water inlet via the hydrogen storage tank. At this time, the liquid in the first heat recovery pipeline 100 and the second heat recovery pipeline 200 heats the hydrogen storage tank to increase the temperature of the hydrogen storage tank. Furthermore, the liquid in the first heat recovery pipeline 100 does not flow to other heat-consuming equipment, but flows through the cold water inlet, and cools the battery stack or the electrical equipment together with the external cold water entering.
[0047] In summary, the heat recovery system provided in the present disclosure includes a recovery pipeline that can take out the heat generated by the battery stack and electrical equipment and transport it to the hydrogen storage tank. By setting up the recovery pipeline, the heat generated by the battery stack and electrical equipment can be recycled, which improves the energy utilization rate of the fuel cell, while improving the system stability, achieving precise control of the hydrogen discharge temperature of the hydrogen storage tank, ensuring the stability of the hydrogen gas source, and improving the stability of the system operation. The specific structure, working principle, and beneficial effects of the heat recovery system provided in the embodiments of the present disclosure can refer to the heat recovery system described in any of the above embodiments, and will not be repeated here.
[0048] Finally, it should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other. For the system or device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part description.
[0049] The above embodiments are only used to illustrate the technical solutions of the present disclosure, rather than to limit them. Although the present disclosure has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present disclosure.
Claims
1. A heat recovery system for recovering waste heat from electrical equipment and fuel cells, characterized in that: include: A power supply module, comprising a hydrogen storage tank and a fuel cell stack, wherein the hydrogen storage tank is used to provide hydrogen to the fuel cell stack; An electrical device connected to the power supply module and configured to operate under the action of the power supply module; A heat recovery pipeline connects the electrical equipment and the fuel cell stack with the hydrogen storage tank, and is used to transport the waste heat of the electrical equipment and the fuel cell stack to the hydrogen storage tank.
2. The heat recovery system according to claim 1, characterized in that: The heat recovery pipeline comprises: The first heat recovery pipeline connects the electrical equipment and is wound around the hydrogen storage tank, and is used to transport the waste heat of the electrical equipment to heat the hydrogen storage tank.
3. The heat recovery system according to claim 2, characterized in that: The heat recovery pipeline also includes: The second heat recovery pipeline is arranged in parallel with the power supply module to transport the waste heat of the fuel cell stack to heat the hydrogen storage tank.
4. The heat recovery system according to claim 3, characterized in that: One end of the second heat recovery pipeline is in communication with the first heat recovery pipeline.
5. The heat recovery system according to claim 2, characterized in that: Also includes: A cold water inlet is used to provide cold water to the battery stack and the electrical equipment respectively, wherein the first heat recovery pipeline is connected to the cold water inlet.
6. The heat recovery system according to claim 2, characterized in that: Also includes: The waste heat discharge pipeline is connected to the first heat recovery pipeline and is used to provide the waste heat of the first heat recovery pipeline to other heat-using equipment.
7. The heat recovery system according to claim 6, characterized in that: The first heat recovery pipeline also includes: The solenoid valve is arranged between the hydrogen storage tank and the first heat recovery pipeline, and is used to control the connection and disconnection between the first heat recovery pipeline and the hydrogen storage tank.
8. The heat recovery system according to claim 7, characterized in that: Also includes: A temperature control module is connected to the hydrogen storage tank and is used to control the temperature of the hydrogen storage tank.
9. The heat recovery system according to claim 1, characterized in that: The power supply module also includes: The ejector is arranged between the hydrogen storage tank and the fuel cell stack, and is used for receiving and / or transporting hydrogen.
10. The heat recovery system according to claim 1, characterized in that: Also includes: The control module is arranged between the power supply module and the power-consuming device, and is used for adjusting the voltage output by the power supply module to a voltage suitable for the power-consuming device.