本研究藉由實驗探討高熱傳導石墨膜對於質子交換膜燃料電池堆性能以及熱管理的影響。石墨膜具有高熱傳導以及質量輕薄的特性使其作為一個熱管理機制不但能縮小散熱系統的體積與重量，讓電池內部溫度較均勻避免局部熱點產生而破壞電池。本實驗採用十級電池堆，將石墨膜裁剪成流道形式，置於電池堆中央部份，探討不同散熱鳍片型式以及在不同操作條件下對電池堆性能的影響，並使用熱電耦作電池溫度量測。實驗結果顯示加入石墨膜能有效地使得電池堆性能提昇，而石墨膜在配合使用風扇作為散熱系統的情況，能使得所需風扇的回功降低，不但能縮小散熱系統的體積與重量，也使得整個燃料電池發電系統體積與重量縮小。本實驗結果也證實了石墨膜應用於中小型燃料電池堆的可行性。

This work experimentally investigates the effects of the pyrolytic graphite sheets (PGS) on the performance and thermal management of a proton exchange membrane fuel cell (PEMFC) stack. These PGS with the features of light weight and high thermal conductivity serve as heat spreaders in the fuel cell stack for the first time to reduce the volume and weight of cooling systems, and homogenizes the temperature in the reaction areas to avoid hot spot which might damage the membrane. In this study, A PEMFC stack with 10 cells in series is constructed. PGS are cut into the shape of flow channel and inserted in cathode side of the stack to investigate the effects on performance of the fuel cell stack in different operating conditions. Temperature variation in the stack is estimated by K-type thermalcouples. It is shown that the maximum power of the stack increase with PGS attached, and PGS with fan serves as cooling system could reduce the back work ratio from the stack to the fan. PGS could reduce the volume and weight of cooling system, and it means reduce the volume and weight of the whole fuel cell stack. Results of this study demonstrate the feasibility of application of PGS to the thermal management of a small-to-medium-sized fuel cell stack.

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