Heat management method for proton exchange membrane fuel cell based on array heat pipe phase change heat transfer

A proton exchange membrane, fuel cell technology, applied in fuel cells, fuel cell additives, circuits, etc., can solve the hidden danger of unsafe battery operation, reduce the energy conversion efficiency of battery packs, etc., achieve optimal design, ensure stability, The effect of ensuring safety

Inactive Publication Date: 2014-04-09
JILIN JIANZHU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the water is polluted and the conductivity increases, a little electrolysis will occur in the public pipes of the battery pack's cooling water path, resulting in and , causing unsafe hidden dangers in battery operation; at the same time, a certain amount of internal leakage will be generated, which will reduce the energy conversion efficiency of the battery pack

Method used

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  • Heat management method for proton exchange membrane fuel cell based on array heat pipe phase change heat transfer
  • Heat management method for proton exchange membrane fuel cell based on array heat pipe phase change heat transfer
  • Heat management method for proton exchange membrane fuel cell based on array heat pipe phase change heat transfer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The size of the cross-section of the selected heat pipe is on two parallel copper panels of 82mm×30mm×0.3mm. 10 rectangular copper strips parallel to each other are welded by laser welding, and the rectangular copper strips are welded every 1.7 Inlaid between two copper plates at equal distances of mm, and the four circles of copper plates are sealed. Therefore, the adjacent copper bars and the upper and lower copper plates form a rectangular flow channel with an area of ​​1.50mm×0.80mm. The thickness of the upper and lower heat pipe cover plates is 0.3mm. The thin cover plate can well reduce the thermal resistance of the heat pipe itself. Heat production. In order to ensure the welding quality of the heat pipe, high-precision laser welding is adopted. The length of the heat pipe evaporation section is 30mm, the insulation section is 20mm and the condensation section is 30mm.

[0043] The pipe diameters are different, but the number of pipes is the same;

[0044] ...

Embodiment 2

[0048] like Figure 5-8 As shown, the number of tubes is different, the number of heat tubes is different when the tube diameter is the same and 0.3cm is used, and the heat dissipation is very different. In this experiment, 3, 5, 7 and 9 heat pipes were used in turn for comparative analysis.

[0049]

[0050] The results are clear, with temperatures dropping from an average of 55.15 degrees to 46.96 degrees. Therefore, it has been proved that the number of heat pipes has a great influence on the heat dissipation effect, so the array heat pipes should be used as much as possible to dissipate heat when cooling the fuel cell.

Embodiment 3

[0052]

[0053] from Figure 9-11 It can be seen that there is almost no change in temperature. It can be proved that the angle has no obvious influence on the heat dissipation effect, so in the heat pipe heat dissipation design of the fuel cell, in order to save space, an angled heat pipe can be used for design. When a large number of heat pipes are used, the temperature of the fuel cell has an obvious downward trend, which proves that the heat pipe can effectively and evenly release the waste heat generated by the fuel cell during operation, and reduce the temperature to keep it running at a good temperature. And the number of heat pipes has a great influence on the heat dissipation effect.

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Abstract

The invention relates to a heat management method for a proton exchange membrane fuel cell based on array heat pipe phase change heat transfer. The heat management method for the proton exchange membrane fuel cell is characterized by comprising the following step of tightly inlaying array micro-channel heat pipes, which are connected in parallel, onto a fuel cell plate, wherein the pipe diameter of each heat pipe is 0.3cm-0.5cm. The proton exchange membrane fuel cell heat management method provided by the invention has the advantages that the fire-new heat pipe manner is adopted to carry out heat management, a cell is internally radiated through the heat pipes, and the problems that the local overheating is processed and the like are solved; the total temperature drop of the heat pipes is the sum of temperature drop of all parts of a steam flowing channel, an evaporation section and a condensation section, the volume of a wick of each heat pipe is very small, the temperature drop of vapor stream is not large, and the thermodynamic property is good.

Description

technical field [0001] The invention relates to a proton exchange membrane fuel cell heat management method based on phase change heat transfer of array heat pipes, which is applied to the field of heat dissipation for fuel cells. Background technique [0002] Proton exchange membrane fuel cell is an electrochemical development and application device, which is very different from conventional batteries. Fuel cells convert chemical energy directly into electrical energy electrochemically and isothermally. It has no heat engine process, so it is not limited by the Carnot cycle, and has extremely high energy conversion efficiency; it is friendly to the environment and basically does not emit sulfur oxides and nitrogen oxides; it is precisely because of these superior characteristics that the fuel cell technology The improvement and research and development have been recognized by every government and enterprise in the world, and it is regarded as the preferred pollution-free a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/04
CPCY02E60/50H01M8/04074
Inventor 孙世梅石瑶
Owner JILIN JIANZHU UNIVERSITY
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