Dynamic response of the direct methanol fuel cell under variable load conditions

被引:55
作者
Argyropoulos, P [1 ]
Scott, K [1 ]
Taama, WM [1 ]
机构
[1] Newcastle Univ, Dept Chem & Proc Engn, Newcastle Upon Tyne NE1 7RU, Tyne & Wear, England
基金
英国工程与自然科学研究理事会;
关键词
direct methanol fuel cell; dynamic response; transient behaviour;
D O I
10.1016/S0378-7753(99)00475-9
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The transient response of the direct methanol fuel cell (DMFC) is of paramount importance when it is used for transportation applications. With the aid of a computer-controlled load unit we have applied a variety of loading cycles on a small-scale single DMFC in order to evaluate the effect of the loading pattern and operating conditions on the cell's response time and performance. The cell responds rapidly, and reversibly, to changes in magnitude and rate of change of load. Under dynamic operation the cell voltage response can be significantly better than that achieved under steady state operation. Open circuit potentials are also increased, by up to 100 mV, by imposing a dynamic loading strategy. This improvement, accredited, in part, to a reduction in the effect of methanol crossover, is potentially attractive in vehicle applications where higher power density and fuel efficiency can be realised. (C) 2000 Elsevier Science S.A. All rights reserved.
引用
收藏
页码:153 / 161
页数:9
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