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Modeling method of proton exchange membrane fuel cell cooling system

A technology of proton exchange membrane and fuel cell, which is applied in the direction of fuel cell, fuel cell additive, fuel cell control, etc. It can solve the problems of numerous calculation efficiency of model grids, poor heat transfer capacity, and inability to couple fuel cell stack models.

Active Publication Date: 2019-08-16
TIANJIN UNIV
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Problems solved by technology

Commonly used automobile radiators include two types, one is a tube-and-belt radiator, and the other is a shell-and-tube radiator. The shell-and-tube radiator has better rigidity, but the manufacturing process is complicated and the heat transfer capacity is poor. Therefore, in the limited space of the car power cabin, the tube-belt heat exchanger is more reasonable
At present, the simulation research on the tube strip finned radiator is mainly concentrated in the 3D model, but this kind of model has many meshes and low calculation efficiency, and cannot be directly coupled with the fuel cell stack model, and is not suitable for a complete fuel cell stack model. Battery system simulation tool development

Method used

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  • Modeling method of proton exchange membrane fuel cell cooling system
  • Modeling method of proton exchange membrane fuel cell cooling system
  • Modeling method of proton exchange membrane fuel cell cooling system

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Embodiment Construction

[0063] The method of the invention and the specific steps of model establishment are described in detail below through calculation examples.

[0064] The present invention utilizes the tube strip finned heat exchanger to cool the fuel cell, wherein the establishment of the heat exchanger model is based on the gas-liquid heat exchange, and the structural diagram of the radiator is as follows Figure 1-4 As shown, the specific model calculation steps are as follows:

[0065] The main parameters involved in the implementation of the calculation example are as follows:

[0066] The structural parameters of the radiator are as follows: flat tube width D m 1.5mm, flat tube length T d 16mm, tube wall thickness δ is 0.25mm, flat tube spacing T p 6.5mm, number of flat tubes n t is 58, fin thickness δ f 0.06mm, fin spacing F p 1.115mm, fin length F l 5mm, number of fins n f is 266, the louver spacing L p 0.805mm, shutter length L l is 4.56mm, the louver angle θ is 30°, and the...

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Abstract

The invention discloses a modeling method of a proton exchange membrane fuel cell cooling system, a fuel cell is cooled by using a tubular strip-shaped finned heat exchanger, and the establishment ofa heat exchanger model is based on gas-liquid heat exchange, establishment of a specific model of the cooling system comprises seven steps of establishing an energy conservation equation, calculatingthe efficiency of a radiator, calculating the convective heat transfer between cooling liquid and a flat tube, calculating the heat conduction inside the tube wall, calculating the convective heat transfer between the outside of the flat tube and air, calculating the fin efficiency and calculating the heat transfer between the cooling liquid and an electric pile. The defects that an existing three-dimensional radiator model is low in calculation efficiency and cannot be directly used in a system model are overcome. The radiator model is based on efficiency-heat transfer unit number method, does not need an image logarithm average temperature difference method for iterative calculation, the calculation efficiency of the model is high, and enough model precision can be guaranteed.

Description

technical field [0001] The invention is applied to the field of proton exchange membrane fuel cells, and in particular relates to a modeling method for a perfect cooling system of the proton exchange membrane fuel cells. Background technique [0002] Proton exchange membrane fuel cell (PEMFC) has the advantages of high energy density, high energy conversion efficiency, low operating temperature and zero emission, and is considered to be one of the clean energy sources that can be used in the future transportation industry. Proton exchange membrane fuel cell system includes fuel cell stack, gas supply system, humidification system, thermal management system and control system, and the coordination and cooperation among auxiliary subsystems ensures the efficient and stable operation of the system. [0003] The electrochemical reaction inside the fuel cell is accompanied by the generation of a large amount of heat. If the heat dissipation is too slow, the temperature of the sta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50H01M8/04298
CPCH01M8/04305G06F30/20Y02E60/50
Inventor 杜青杨子荣罗威范立超焦魁
Owner TIANJIN UNIV
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