以逆向熱傳法推算燃料電池內部溫度精確度之影響因素研究

Investigation of the Factors Influential to the Numerical Accuracy on Predicting the Temperature Distribution in the Fuel Cell Using Inverse Heat Transfer Method

張鴻明(Hong-Ming Jang) ； 張立中(L.C. Chang)

《華岡工程學報》 21期 (2007/06) Pp. 41-48

https://doi.org/10.29987/CCUHKJE.200706.0007

摘要

質子交換膜燃料電池運作時，由於電化學反應與歐姆阻抗等作用會由內部不斷發熱，此時其膜電極組是否能保持在容許溫度範圍內運作攸關其效能。惟由於膜電極組相當薄，又包封在內部，其溫度之直接監測並不容易。最可行的方式乃是由量測電池外殼之表面溫度然後透過逆向熱傳方法來推算其膜電極組表面之溫度。本研究結合了熱流分析套裝軟體ANSYS CFX的熱傳導模式與共軛梯度法(CGM)以進行逆向熱傳分析。分析範圍由外而內包含質子交換膜燃料電池端版、襯墊、集電板、流道板等，探討之重點初步包含起始值、溫度場型態、外表監測點數目與位置等因素對質子交換膜燃料電池內部溫度分佈推測精度之影響效應。

關鍵字

燃料電池 ； 共軛梯度法 ； 數值模擬 ； 逆向熱傳

並列摘要

Due to the electrochemical reaction and Ohmic resistance, the proton exchange membrane fuel cell (PEMFC) would generate heat internally as it is working. To keep the membrane-electrode assembly (MEA) working at appropriate temperature is essential for maintaining good performance. However, the MEA is very thin, 0.1㎜ approximately, it is not appropriate to monitor the temperature distribution by direct measurement. Therefore, an inverse heat transfer method is proposed to calculate the surface temperature distribution of the MEA from the temperature measured at some locations on the outer surface of the fuel cell. In this article, the package, ANSYS CFX, is incorporated with the Conjugate Gradient Method (CGM) to form the inverse-heat transfer calculation procedure. The domain includes the end plate, gasket, current collector, and carbon plate. Investigation focuses on how much the numerical accuracy may be affected by the factors including the initial values, type of temperature field, and the locations on the surface where temperature are measured.

並列關鍵字

Fuel cell ； Conjugate-gradient method ； Numerical simulation ； Inverse heat transfer method