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Numerical Prediction of Water Content Distribution of Catalyst Coated Membrane of Fuel Cell Stack using Simulation

Article of Honda R&D Technical Review Vol.28 No.1

Summary

The distribution of the water content of catalyst-coated membranes (CCM) is a factor that affects the durability of polymer electrolyte fuel cells. Because the in-plane distribution of the water content of the CCM in fuel cell stacks changes with changes in fuel cell operating conditions such as the coolant inlet temperature and the cathode electrode gas inlet flow rate, the setting of appropriate operating conditions is important in helping to ensure fuel cell durability.
The research discussed in this paper therefore developed a simulation making it possible to accurately predict operating conditions in a short period, and studied the effect of operating conditions on the in-plane distribution of the water content of the CCM. The results of this study indicated that the in-plane distribution of water content could be controlled via three operating condition parameters: the coolant inlet temperature, the cathode gas inlet pressure, and the cathode gas inlet flow rate.
Using the developed simulation and the results of the study of the effect of operating conditions on the in-plane distribution of the water content of the CCM made it possible to maintain the in-plane distribution within the upper and lower limit values and reduced variation in the distribution. It was also possible to apply accurate operating conditions in the 2016 FCV fuel cell stack in a period of several days.

Reference

(1) Saito, N., Kikuchi, H., Nakao, Y.: New Fuel Cell Stack for FCX Clarity, Honda R&D Technical Review, Vol. 21, No. 1, p. 16-23
(2) Nishikawa, N.: Nenryodenchi no Gijyutsu -Kotaikoubunshigata no Kadai to Taisaku-, Tokyo Denki University Press, p. 84-113, (2010) (in Japanese)
(3) Sato, M., Chiba, H., Inoue, M.: Development of CCM Water Content Distribution Measurement System for Fuel Cell Stack, Honda R&D Technical Review, Vol. 28, No. 1, p. 16-25
(4) Iwanari, T., Miyajima, K., Furusawa, K., Inoue, M.: Real-time Measurement of Water Content of CCM in On-board Fuel Cell Stack System, Honda R&D Technical Review, Vol. 28, No. 1, p. 34-40
(5) Yoneda, M., Tago, Y., Suzuki, K., Takimoto, M., Ejiri, E.: Macroscopic Modeling and Simulation for Polymer Electrolyte Membrane Fuel Cells, ECS Transactions, 11-1, p. 1105-1114, (2006)
(6) Kimura, K., Kawasaki, T., Atsumi, Y., Ohmura, T., Shimizu, K.: Development of New Fuel Cell Vehicle CLARITY FUEL CELL, Honda R&D Technical Review, Vol. 28, No.1, p. 1-8

Author (organization or company)

Kenji NAGUMO(Automobile R&D Center)、Masajiro INOUE(Automobile R&D Center)

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