Hydrogen fuel cell waste heat recovery heating system

Abstract

The utility model discloses a hydrogen fuel cell waste heat recovery heating system which comprises a hydrogen fuel cell, a cell radiator and a waste heat recovery device, a plate heat exchanger is connected between the hydrogen fuel cell and the cell radiator, a primary side of the plate heat exchanger is connected with cooling liquid, a secondary side of the plate heat exchanger is connected with the waste heat recovery system, and the waste heat recovery device is connected with the battery radiator. One end of the waste heat recovery system is connected with a fan heater, the waste heat recovery system comprises a heating water inlet pipe, a heating water outlet pipe, a heating water return pipe and a buffer water tank, and the heating water inlet pipe, the heating water outlet pipe and the heating water return pipe are connected to the secondary side of the plate heat exchanger. According to the utility model, the plate heat exchanger is arranged between the battery radiator and the hydrogen fuel battery, the secondary side of the plate heat exchanger is connected with the waste heat recovery system, the primary side of the plate heat exchanger is connected with the heated cooling liquid, and the waste heat of the battery is recycled by utilizing the waste heat recovery system, so that the temperature of the cooling liquid is reduced; and the energy consumption of the battery radiator is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of hydrogen fuel waste heat recovery, in particular to a hydrogen fuel cell waste heat recovery heating system. Background Art

[0002] During the operation of a hydrogen fuel cell, a large amount of heat is generated. And due to the aging brought about by the service life of the hydrogen fuel cell, its power conversion efficiency decreases, and the proportion of heat generation will be even greater. At present, the heat generated during the operation of a hydrogen fuel cell is transported outside the cabin by a cooling circulation system, and a large-volume heat dissipation device is used in cooperation with a high-power fan for heat dissipation. Its structure is complex, the investment is large, and the operation energy consumption is high. Therefore, a waste heat recovery and waste heat heating system is designed, which reduces the energy consumption of the cooling system while utilizing waste heat, and greatly improves the utilization rate of hydrogen fuel cells. Content of the Utility Model

[0003] The purpose of the utility model is to provide a hydrogen fuel cell waste heat recovery heating system. By setting a plate heat exchanger between the battery radiator and the hydrogen fuel cell, the secondary side of the plate heat exchanger is connected to the waste heat recovery system, and the heated coolant is introduced into the primary side of the plate heat exchanger. A circulating water path is formed through the heating inlet pipe, the heating outlet pipe, the heating return pipe and the buffer tank to cool the coolant, so that the water temperature in the circulating water path rises. The heated water body is used to provide heat for heating, which not only recovers and utilizes heat energy, but also reduces the energy consumption of the cooling system, and greatly improves the utilization rate of energy.

[0004] The utility model provides the following technical solution: A hydrogen fuel cell waste heat recovery heating system includes a hydrogen fuel cell, a battery radiator and a waste heat recovery device. A plate heat exchanger is connected between the hydrogen fuel cell and the battery radiator. The primary side of the plate heat exchanger accesses the heated coolant of the battery radiator, and the secondary side of the plate heat exchanger is connected to the waste heat recovery system. One end of the waste heat recovery system is connected to a warm air blower. The waste heat recovery system includes a heating inlet pipe, a heating outlet pipe, a heating return pipe and a buffer tank connected to the secondary side of the plate heat exchanger. The buffer tank is connected to the heating inlet pipe for water supply. The heating outlet pipe is connected to the warm air blower. One end of the heating return pipe is connected to the warm air blower, and the other end is communicated with the buffer tank. The heating outlet pipe is connected to the heating return pipe.

[0005] In order to enable the warm air blower to provide hot air, the warm air blower includes a fan and a circulating pipeline. One end of the circulating pipeline is connected to the heating outlet pipe, and the other end is connected to the heating return pipe.

[0006] In order to keep the pressure of the heating inlet pipe stable, a return water bypass is connected to the heating inlet pipe. The return water bypass is connected to the buffer tank, and a proportional valve and an overflow valve are connected to the return water bypass.

[0007] To regulate the liquid flow rate in the heating inlet pipe, a liquid supply pump is provided between the buffer water tank and the heating inlet pipe. Valves are provided on both sides of the liquid supply pump. A thermometer, a flow meter, and a pressure gauge are connected to the heating inlet pipe, and a pressure gauge and a thermometer are connected to the heating outlet pipe.

[0008] To form a circulating water path for the coolant on the primary side of the plate heat exchanger, an inlet pipe is connected between the battery radiator and the hydrogen fuel cell, an outlet pipe is connected between the hydrogen fuel cell and the plate heat exchanger, and a return pipe is connected between the plate heat exchanger and the battery radiator.

[0009] To directly introduce the qualified coolant into the hydrogen fuel cell, a return liquid bypass pipe is also connected between the return pipe and the inlet pipe.

[0010] To control the coolant temperature of the return pipe, a thermometer is connected to the outlet pipe, and a thermometer and a flow meter are connected to the return pipe.

[0011] Compared with the prior art, the beneficial effects achieved by the present utility model are as follows:

[0012] (1) By providing a plate heat exchanger between the battery radiator and the hydrogen fuel cell, the secondary side of the plate heat exchanger is connected to the waste heat recovery system, and the heated coolant is introduced into the primary side of the plate heat exchanger. A circulating water path is formed through the heating inlet pipe, the heating outlet pipe, the heating return pipe, and the buffer water tank to cool the coolant, increase the water temperature in the circulating water path, and use the heated water body to provide heat for heating. While recovering and utilizing the heat energy, the energy consumption of the cooling system is reduced, and the energy utilization rate is greatly improved;

[0013] (2) By providing a thermometer and a flow meter on the pipeline, the temperature of the coolant is controlled within a certain range. When the coolant is lower than the required value, the temperature of the return pipe on the primary side can be adjusted by controlling the flow rate on the secondary side. Description of the Drawings

[0014] The drawings are used to provide a further understanding of the present utility model and constitute a part of the specification. They are used together with the embodiments of the present utility model to explain the present utility model and do not constitute a limitation to the present utility model. In the drawings:

[0015] Figure 1 is the structural diagram of the present utility model;

[0016] In the figure: 1. Hydrogen fuel cell; 2. Battery radiator; 21. Liquid inlet pipe; 22. Liquid outlet pipe; 23. Return liquid pipe; 24. Return liquid bypass pipe; 3. Plate heat exchanger; 4. Waste heat recovery device; 41. Liquid supply pump; 42. Buffer water tank; 44. Liquid storage tank; 45. Heating outlet water pipe; 46. Heating return water pipe; 48. Return water bypass; 49. Heating inlet water pipe; 5. Warm air blower; 51. Fan; 52. Circulation pipeline; 6. Thermometer; 7. Flowmeter; 8. Pressure gauge; 9. Proportion valve; 10. Relief valve. Specific embodiments

[0017] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0018] Embodiment 1

[0019] Please refer to Figure 1 , the present invention provides a technical solution: a hydrogen fuel cell waste heat recovery heating system, including a hydrogen fuel cell 1, a battery radiator 2 and a waste heat recovery device 4. A plate heat exchanger 3 is connected between the hydrogen fuel cell 1 and the battery radiator 2. The primary side of the plate heat exchanger 3 accesses the heated coolant of the battery radiator 2. The secondary side of the plate heat exchanger 3 is connected to the waste heat recovery system to recover the heat of the coolant. One end of the waste heat recovery system is connected to a warm air blower 5. The waste heat recovery system includes a heating inlet water pipe 49, a heating outlet water pipe 45 and a heating return water pipe 46 connected to the secondary side of the plate heat exchanger 3, and a buffer water tank 42. The buffer water tank 42 is communicated with a liquid storage tank 44. Water is pumped into the buffer water tank 42 through a pump. The buffer water tank 42 is connected to the heating inlet water pipe 49 for water supply. The heating outlet water pipe 45 is connected to the warm air blower 5. One end of the heating return water pipe 46 is connected to the warm air blower 5, and the other end is communicated with the buffer water tank 42. The heating outlet water pipe 45 is connected to the heating return water pipe 46. Through the circulating water path formed by the heating inlet water pipe 49, the heating outlet water pipe 45, the heating return water pipe 46 and the buffer water tank 42, heat is absorbed from the secondary side of the plate heat exchanger 3. The water in the circulating water path is heated by the heat, and the heated water flows through the warm air blower 5 to generate hot air, realizing the utilization of waste heat. At the same time, the utilization of waste heat by the plate heat exchanger 3 will reduce the coolant temperature of the hydrogen fuel cell 1, further reducing the energy consumption of the battery radiator 2.

[0020] The heater 5 includes a fan 51 and a circulation pipeline 52. One end of the circulation pipeline 52 is connected to the heating outlet pipe 45, and the other end is connected to the heating return pipe 46. The heated water body enters the circulation pipeline 52 from the heating outlet pipe 45, and then enters the heating return pipe 46 from the other end of the circulation pipeline 52 to realize the circulation of hot water. Moreover, the fan 51 dissipates heat from the circulation pipeline 52 with the heated water body inside, diffusing the heat outward to realize heating.

[0021] A return water bypass 48 is connected to the heating inlet pipe 49. The return water bypass 48 is connected to the buffer tank 42. A proportional valve 9 and an overflow valve 10 are connected to the return water bypass 48. By opening the overflow valve 10, the return water bypass 48 is communicated to further reduce the pressure in the heating inlet pipe 49. The proportional valve 9 is also used to further maintain the pressure stability of the heating inlet pipe 49.

[0022] A liquid supply pump 41 is arranged between the buffer tank 42 and the heating inlet pipe 49. Valves are arranged on both sides of the liquid supply pump 41. The valves can adjust the water flow in the heating inlet pipe 49. A thermometer 6, a flowmeter 7 and a pressure gauge 8 are connected to the heating inlet pipe 49. A pressure gauge 8 and a thermometer 6 are connected to the heating outlet pipe 45. The thermometer 6 is used to detect the water temperature of the heating inlet pipe 49 and the heating outlet pipe 45 in real time. The pressure gauge 8 is also used to detect the pressure of the heating inlet pipe 49 and the heating outlet pipe 45 in real time, ensuring the pressure stability in the pipeline.

[0023] An inlet liquid pipe 21 is connected between the battery radiator 2 and the hydrogen fuel cell 1. An outlet liquid pipe 22 is connected between the hydrogen fuel cell 1 and the plate heat exchanger 3. A return liquid pipe 23 is connected between the plate heat exchanger 3 and the battery radiator 2. The coolant in the battery radiator 2 is introduced into the hydrogen fuel cell 1 through the inlet liquid pipe 21 to absorb heat and cool the hydrogen fuel cell 1. Then, the heated coolant is introduced into the plate heat exchanger 3 through the outlet liquid pipe 22 to realize heat transfer. Finally, the cooled coolant returns to the battery radiator 2 again through the return liquid pipe 23 to form a circulating water path for the coolant.

[0024] A return liquid bypass pipe 24 is also connected between the return liquid pipe 23 and the inlet liquid pipe 21. The cooled coolant meeting the temperature requirement is directly introduced into the hydrogen fuel cell 1 through the inlet liquid pipe 21 through the return liquid bypass pipe 24 to cool the hydrogen fuel cell 1.

[0025] A thermometer 6 is connected to the liquid outlet pipe 22 to detect the temperature of the coolant in the liquid outlet pipe 22 in real time. A thermometer 6 and a flow meter 7 are connected to the liquid return pipe 23 to also detect the temperature and flow rate of the coolant in the liquid return pipe 23. When the temperature meets the requirements, the liquid return bypass pipe 24 is opened and directly introduced into the liquid inlet pipe 21. When the temperature of the coolant is too low, the flow rate of the heating water inlet pipe 49 is reduced by adjusting the valve to further control the heat recovery.

[0026] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A hydrogen fuel cell waste heat recovery heating system, comprising a hydrogen fuel cell, a battery radiator and a waste heat recovery device, characterized in that: A plate heat exchanger is connected between the hydrogen fuel cell and the battery radiator. The primary side of the plate heat exchanger accesses the heated coolant of the battery radiator, and the secondary side of the plate heat exchanger is connected to the waste heat recovery system. One end of the waste heat recovery system is connected to a warm air blower. The waste heat recovery system includes a heating water inlet pipe, a heating water outlet pipe, a heating water return pipe, and a buffer water tank connected to the secondary side of the plate heat exchanger. The buffer water tank is connected to the heating water inlet pipe for water supply. The heating water outlet pipe is connected to the warm air blower. One end of the heating water return pipe is connected to the warm air blower, and the other end is communicated with the buffer water tank. The heating water outlet pipe is connected to the heating water return pipe.

2. The waste heat recovery heating system of a hydrogen fuel cell according to claim 1, wherein: The warm air blower includes a fan and a circulation pipeline. One end of the circulation pipeline is connected to the heating water outlet pipe, and the other end is connected to the heating water return pipe.

3. The waste heat recovery heating system of a hydrogen fuel cell according to claim 1, characterized in that: A return water bypass is connected to the heating water inlet pipe. The return water bypass is connected to the buffer water tank, and a proportional valve and an overflow valve are connected to the return water bypass.

4. A hydrogen fuel cell waste heat recovery heating system according to claim 1, characterized in that: A liquid supply pump is arranged between the buffer water tank and the heating water inlet pipe. Valves are arranged on both sides of the liquid supply pump. A thermometer, a flow meter, and a pressure gauge are connected to the heating water inlet pipe. A pressure gauge and a thermometer are connected to the heating water outlet pipe.

5. A hydrogen fuel cell waste heat recovery heating system according to claim 1, characterized in that: A liquid inlet pipe is connected between the battery radiator and the hydrogen fuel cell. A liquid outlet pipe is connected between the hydrogen fuel cell and the plate heat exchanger. A liquid return pipe is connected between the plate heat exchanger and the battery radiator.

6. The waste heat recovery heating system of a hydrogen fuel cell according to claim 5, characterized in that: A liquid return bypass pipe is also connected between the liquid return pipe and the liquid inlet pipe.

7. A hydrogen fuel cell waste heat recovery heating system according to claim 5, characterized in that: A thermometer is connected to the liquid outlet pipe. A thermometer and a flow meter are connected to the liquid return pipe.

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