Effects of baffle position in serpentine flow channel on the performance of proton exchange membrane fuel cells

作     者：Guodong Xia Xiaoya Zhang Dandan Ma Guodong Xia;Xiaoya Zhang;Dandan Ma

作者机构：MOE Key Laboratory of Enhanced Heat Transfer and Energy ConservationBeijing Key Laboratory of Heat Transfer and Energy ConversionBeijing University of TechnologyBeijing 100124China 

出 版 物：《Chinese Journal of Chemical Engineering》 (中国化学工程学报（英文版）)

年 卷 期：2024年第69卷第5期

页      面：250-262页

核心收录：

学科分类：0808[工学-电气工程] 0709[理学-地质学] 070901[理学-矿物学、岩石学、矿床学] 080103[工学-流体力学] 0817[工学-化学工程与技术] 08[工学] 0807[工学-动力工程及工程热物理] 0703[理学-化学] 0801[工学-力学（可授工学、理学学位）] 

基　　金：financially supported by the Science&Technology Project of Beijing Education Committee(KM202210005013) National Natural Science Foundation of China(52306180) 

主　　题：Proton exchange membrane fuel cell Baffle position Mass transfer Net power Uniformity Voltage increment 

摘      要：This study used a three-dimensional numerical model of a proton exchange membrane fuel cell with five types of channels:a smooth channel(Case 1);eight rectangular baffles were arranged in the upstream(Case 2),midstream(Case 3),downstream(Case 4),and the entire cathode flow channel(Case 5)to study the effects of baffle position on mass transport,power density,net power,***,the effects of back pressure and humidity on the voltage were *** showed that compared to smooth channels,the oxygen and water transport facilitation at the diffusion layer-channel interface were added 11.53%-20.60%and 7.81%-9.80%at 1.68 A·cm^(-2)by adding *** closer the baffles were to upstream,the higher the total oxygen flux,but the lower the flux uniformity the worse the water *** oxygen flux of upstream baffles was 8.14%higher than that of downstream baffles,but oxygen flux uniformity decreased by 18.96%at 1.68 A·cm^(-2).The order of water removal and voltage improvement was Case 4Case 5Case 3Case 2Case *** power of Case 4 was 9.87%higher than that of the smooth *** the Case 4,when the cell worked under low back pressure or high humidity,the voltage increments were *** potential increment for the back pressure of 0 atm was 0.9%higher than that of 2 atm(1 atm=101.325 kPa).The potential increment for the humidity of 100%was 7.89%higher than that of 50%.