Title: Error of single-phase proton exchange membrane fuel cell model based on Brinkman-Darcy's law in different flow fields
Authors: Shizhong Chen; Zhongxian Xia; Xuyang Zhang; Yuhou Wu
Addresses: School of Mechanical Engineering, Shenyang Jianzhu University, 9 Hunnan East Road, Hunnan District, Shenyang, Liaoning, 110168, China ' School of Mechanical Engineering, Shenyang Jianzhu University, 9 Hunnan East Road, Hunnan District, Shenyang, Liaoning, 110168, China ' College of Engineering, University of Miami, 1251 Memorial Drive, Coral Gables, Miami, FL 33146, USA ' National-Local Joint Engineering Laboratory of NC Machining Equipment and Technology of High-Grade Stone, Shenyang Jianzhu University, 9 Hunnan East Road, Hunnan District, Shenyang, Liaoning, 110168, China
Abstract: Proton exchange membrane (PEM) fuel cell is an auspicious energy device for the future with high energy efficiency and zero emissions. PEM fuel cell performance can be improved by optimising the flow field using numerical models based on Brinkman-Darcy's law. However, errors made by applying Brinkman-Darcy's law cannot be avoided; errors should be carefully investigated for different flow fields. In this paper, a single-phase PEM fuel cell model based on Brinkman-Darcy's law was developed, considering the effects of flow field on both local electrochemical active area (ECA) and effective permeability. The results showed that the model well predicted the performance of the flow field with a high resolution land width, such as 1 mm, but it over-estimated the performance under the low voltage region when the land width was 2 mm or larger, since the high mass transfer loss was under-estimated by the model.
Keywords: Brinkman-Darcy's law; flow fields; under-land cross-flow; proton exchange membrane fuel cell.
International Journal of Simulation and Process Modelling, 2019 Vol.14 No.5, pp.399 - 406
Received: 09 Aug 2018
Accepted: 25 Dec 2018
Published online: 09 Dec 2019 *