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One of the most important parts of the polymer fuel cell is the bipolar plate, which through the channel paths as the flow field in these plates, the availability of reactive gases to the surface of the catalyst layer is possible to carry out the electrochemical reactions of the fuel cell. So far, many researchers have been designing different flow streams for fuel cells, although each of the models has its own advantages and disadvantages, but a suitable design for the fuel cell flow field, which has a uniform distribution of reactive gases on the surface of the catalyst layer, Access to higher performance and longer fuel cell life is very important. In this paper, we introduce a new flow pattern for fuel cell flow field, and the numerical results obtained with a conventional parallel model are compared. The flow-shaped designs have been modified with a spiral and the total dimensions of the cell are 6400 mm 2, which has allowed access to uniform distribution of reactive gases, flow density and temperature distribution. An increase of 66% was achieved with a limited density and increased 1.7 times the power density by adjusting the arrangement for the flow field. Therefore, considering the design of the fuel cell based on the power density curve presented in the new model, the specific characteristics and power of the fuel cell in an air mission have been addressed and the availability of high specific power that is of particular importance in aerial applications is achieved.

Keywords: Polymer membrane fuel cell, flow field design, fuel cell lifespan, uniform distribution of reactive gases, aerial application

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