| Autor: |
جهرمی, مهبد معین, کرمانی, محمد جعفر, موحد, سعید |
| Zdroj: |
Modares Mechanical Engineering; 2017, Vol. 17 Issue 6, p67-78, 12p |
| Abstrakt: |
Degradation of Fuel Cell (FC) components under dynamic loads is one of the biggest bottlenecks in FC commercialization. A novel experimental based model is presented to predict the Catalyst Layer (CL) performance loss under a given cyclic load. It consists of two sub-models: Model 1 computes CL Electro-Chemical Surface Area (ECSA) under an N-cyclic load with the aid of an analogy with fatigue phenomena of carbon steel by using some correction factors. Ostwald ripening of agglomerate particles in the CL is also modeled. Model 1 validation shows good agreements between its outputs and a large number of experiments with maximum 7% error. Model 2 is an already-completed task in an earlier study which uses the agglomerate model to calculate the CL performance for a given ECSA. Combination of Models 1 & 2 predicts the CL performance under a dynamic load. A set of parametric studies was performed to investigate the effects of operating parameters on the Voltage Degradation Rate (VDR). The results show that temperature is the most influential parameter, an increase from 60oC to 80oC leads to 20.26% VDR increase, and pressure is the least effective one, an increase from 2atm to 4atm leads to 1.41% VDR rise. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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