Fundamental Theory of Phosphoric Acid Fuel Cell Engineering

本研究的目的是从材料的性质、电池或堆的结构以及燃料电池的工作条件出发，发展和扩展计算燃料电池内电压电流分布、温度分布和气体浓度分布的理论。该理论适用于烟囱的优化设计、改进操作方法或防止腐蚀情况。1991年，对电池元件在空气/氢气、氢/氢气、氮/氢气、空气/氮气、氮/氮气、空气/空气作为阴极/阳极的气体组合等各种气体条件下的基本性能进行了测量，这对于分析电池在启停、负载变化、热备用、冷停机等各种情况下的性能是必不可少的。1992年，在大型实际规模电池中测量了快速负载跟随条件下的瞬态性能分布。随着燃料供应延迟时间的增加，电池内出现燃料缺乏区域，并检测到理论预测的局部腐蚀循环电流。提出了一种随动载荷允许极限理论，并通过实验验证。从1991年后期开始，人们开始研究细胞内的蒸汽输送机制。提出了包括蒸汽输送机理在内的磷酸燃料电池性能分析的扩展精确理论。在此资助期内进行了两项绩效分析的应用研究。一是研究细胞局部短路的检测方法，二是研究长期运行后的异常现象。这些结果被报道为trass . i.i.e.的6篇全文。日本。

Purpose of this research is to develop and expand theories for calculating voltage-current distributions, temperature distributions and gas concentration distributions in fuel cells from properties of materials, configurations of cells or a stack, and fuel cells operating conditions. The theory is applicable to optimizing design of the stack, improving operating methods, or preventing corrosive circumstances.1. In 1991, fundamental performances of the cell elements at various gas conditions such as air/hydrogen, hydrogen/hydrogen, nitrogen/hydrogen, air/ nitrogen, nitrogen/nitrogen, and air/air as gas combination of cathode/anode were measured, which were indispensable to analyzing cell performances at various circumstances such as start-stop, load change, hot-standby, or cold halt.2. In 1992, transient performance distributions in a large practical scale cell at fast load following conditions were measured. As the delay time of the fuel supply increased, fuel lack area appeared in the cell and local corrosive circulating current were detected as predicted by theories.An allowable limit theory for load following operation was developed and certified by the experiments.3. From the late 1991, steam transport mechanism in a cell was investigated.Expanded precise theory of performance analysis for phosphoric acid fuel cells including steam transport mechanism was developed.4. Two applied research of performance analysis were carried out for this grant-in-aid period. One was research for detecting method of local short circuit in cells, and the other was research on abnormal phenomena after long term operation.These results were reported as 6 full papers of the Tras.I.I.E. of Japan.