Establishment method for total-cell three-dimensional two-phase model of proton exchange membrane fuel cell

A proton exchange membrane, fuel cell technology, applied in solid electrolyte fuel cells, electrical digital data processing, special data processing applications, etc., can solve the problem of difficult to truly reflect the internal transmission process of proton exchange membrane fuel cells.

Active Publication Date: 2018-11-06
TIANJIN UNIV
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Problems solved by technology

[0004] Due to the complexity of the internal transport process of the proton exchange membrane fuel cell and the limitation of computing power, the traditional fuel cel

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  • Establishment method for total-cell three-dimensional two-phase model of proton exchange membrane fuel cell
  • Establishment method for total-cell three-dimensional two-phase model of proton exchange membrane fuel cell
  • Establishment method for total-cell three-dimensional two-phase model of proton exchange membrane fuel cell

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Embodiment Construction

[0160] The design scheme of the present invention will be further described below in conjunction with the accompanying drawings and examples. It should be noted that this example is a narrative description for clearly explaining the modeling steps, and does not limit the scope of protection of the present invention.

[0161] For the convenience of description, the three-dimensional two-phase full battery numerical model constructed includes: constructing the overall conservation equation, constructing the conservation equation related to the distribution of liquid water, constructing the conservation equation related to the electrochemical reaction, introducing the polymer model of the catalytic layer, and expressing the source term of the conservation equation The formula has 5 parts. Among them, the polymer model that reflects the real structure of the catalytic layer can be used for the performance of proton exchange membrane fuel cells, the prediction of internal mass and h...

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Abstract

The invention discloses an establishment method for a total-cell three-dimensional two-phase model of a proton exchange membrane fuel cell. The model construction method comprises the steps of constructing a global conservation equation, constructing a liquid water distribution relevant conservation equation, constructing an electrochemical reaction relevant conservation equation, introducing a catalyst layer agglomerate model and constructing an expression of conservation equation source items. Relevant equations are established according to the steps, and through numerical solving calculation, gas concentration distribution, liquid water volume fraction distribution, membrane water distribution and cell performance in the proton exchange membrane fuel cell under a catalyst particle volume fraction and an electrolyte volume fraction in catalyst layers can be obtained. Most traditional models ignore liquid water in channels or do not consider the influence of gas-liquid phase change inthe channels. According to the model, a liquid water saturation equation is solved in the channels, and the gas-liquid phase change process is considered; and after liquid water distribution in the channels is obtained, the influence of liquid water on gas flowing in the channels is reflected through correction of a viscosity value in a gas momentum equation, and therefore a good data basis is provided for further research.

Description

technical field [0001] The invention belongs to the field of electrochemical fuel cells, and in particular relates to a method for establishing a calculation model for a proton exchange membrane fuel cell. Background technique [0002] Proton exchange membrane fuel cell (PEMFC) is widely considered as a promising clean energy technology due to its high power density, fast start-up, and high conversion efficiency. In recent years, proton exchange membrane fuel cells have made great progress in terms of performance improvement, fuel storage, power supply, etc., but some technical difficulties still hinder the commercialization of proton exchange membrane fuel cells. The proton exchange membrane fuel cell is a device that directly converts the chemical energy in the fuel (hydrogen) into electrical energy through an internal electrochemical reaction. It involves complex mass transfer, heat transfer and reaction mechanisms. The derived water heat management, The limitations of r...

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Application Information

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IPC IPC(8): G06F17/50H01M8/10
CPCH01M8/10G06F30/20Y02E60/50
Inventor 焦魁张国宾谢彪
Owner TIANJIN UNIV
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