Journal of Jilin University(Engineering and Technology Edition) ›› 2022, Vol. 52 ›› Issue (9): 1971-1981.doi: 10.13229/j.cnki.jdxbgxb20220355

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Sensitivity analysis of operating parameters for proton exchange membrane fuel cells

Zi-rong YANG1,2(),Yan LI1,3,Xue-feng JI1,2,Fang LIU3,Dong HAO1,2()   

  1. 1.CATARC New Energy Vehicle Test Center （Tianjin） Co. ，Ltd. ，Tianjin 300399，China
    2.China Automotive Technology and Research Center Co. ，Ltd. ，Tianjin 300399
    3.School of Mechanical Engineering，Hebei University of Technology，Tianjin 300401，China
  • Received:2022-03-31 Online:2022-09-01 Published:2022-09-13
  • Contact: Dong HAO E-mail:yangzirong@catarc.ac.cn;haodong@catarc.ac.cn

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Abstract:

A one-dimensional transient multiphase fuel cell model and a global sensitivity analysis model were established to investigate the effects of operating temperature， relative humidity， stoichiometry， and pressure on output performances. The result shows that the variation of operating temperature leads to more significant performance fluctuations at high load conditions. Increasing gas pressure and stoichiometry is beneficial to performance enhancement. The membrane dehydration phenomena caused by low relative humidity becomes more severe in small current density regions. Based on the quantitative sensitivity analysis， the nine operating parameters are classified as very sensitive， rather sensitive， and not sensitive parameter. With current density rising， cathode stoichiometry， anode inlet relative humidity， and cathode inlet relative humidity are more sensitive， which also show a typically upward trend.

Key words: power engineering and engineering thermophysics, proton exchange membrane fuel cell, operating parameter, transient mechanism model, global sensitivity analysis

CLC Number: 

  • TM911.42

Table 1

Fuel cell structural properties and operating conditions"

参数数值单位
有效反应面积25cm2
质子交换膜、催化层、微孔层、气体扩散层、流道、极板的厚度0.025，0.01，0.03，0.2，1，2mm
质子交换膜、催化层、微孔层、气体扩散层、极板的密度1980，1000，1000，1000，1000kg·m-3
质子交换膜、催化层、微孔层、气体扩散层、极板的比热容833，3300，568，2000，1580J/（kg·K）
质子交换膜、催化层、微孔层、气体扩散层、极板的热导率0.95，1.0，1.0，1.0，20W/（m·K）
催化层、微孔层、气体扩散层、极板的电导率3000，3000，3000，5000S/m
催化层中聚合物的体积分数0.45-
催化层、微孔层、气体扩散层的接触角100，120，120°
催化层、微孔层、气体扩散层的孔隙率0.3，0.4，0.7-
环境对流传热系数20W/（m2·K）
进气化学计量比1.5-
进气压强151 988Pa
运行温度80℃
进气相对湿度0.8-
进气温度80℃

Table 2

Governing equations"

方程计算表达式求解域
膜态水守恒方程ρPEMEW?ωλ?t=ρPEMEW??Dmweff??λ+Smw质子交换膜、催化层
液态水守恒方程?ερlqslq?t=??ρlqKlqμlq??pl+Slq催化层、扩散层、微孔层
气体守恒方程??tε1-slqρgYi=??ρgDieff?Yi+Si,??in??CL,MPL,GDL??tρgYi+??ρgugYi=Si,???inCH催化层、扩散层、微孔层、流道
能量守恒方程??tρcpfl,sleffT=??kfl,sleff??T+ST整个燃料电池区域
输出电压

Vout=Vnernst-Vact-Vohmic-Vconc

Vnernst=ΔG2F+ΔS2FT-Tref+RT2FlnPH2Pref,a+12lnPO2Pref,c

-

Fig.1

Trajectory diagram in the input space for k=3"

Fig.2

Comparison between model simulation results and experimental data"

Table 3

Simulation conditions"

工况温度/℃压强/Pa化学计量比相对湿度
180151 9881.50.8
290151 9881.50.8
370151 9881.50.8
460151 9881.50.8
580121 5901.50.8
680202 6501.50.8
780253 3121.50.8
880151 9881.30.8
980151 9882.00.8
1080151 9882.50.8
1180151 9881.50.2
1280151 9881.50.3
1380151 9881.50.4
1480151 9881.50.6
1580151 9881.51.0

Fig.3

Fuel cell performances when the operating temperature is 60，70，80， and 90 ℃"

Fig.4

Fuel cell performances when the operating pressure is different"

Fig.5

Fuel cell performances when stoichiometry is 1.3， 1.5， 2.0 and 2.5"

Fig.6

Fuel cell performances when the relativehumidity is different"

Table 4

Value of fuel cell operating parameters"

参数符号取值
燃料电池运行温度/℃Tcell60~80
阳极进气温度/℃Tin，a60~80
阴极进气温度/℃Tin，c60~80
阳极进气湿度RHa0.1~1.0
阴极进气湿度RHc0.1~1.0
阳极进气化学计量比STa1.0~3.0
阴极进气化学计量比STc1.0~3.0
阳极进气压强/PaPa101 325~303 975
阴极进气压强/PaPc101 325~303 975

Fig.7

Sensitivity index of operating parameters at 1.0 A·cm-2"

Table 5

Sensitivity classification of operating parameters"

分类运行工况参数
高敏感参数STc、RHa、RHc
较敏感参数Pc、Pa、STa
不敏感参数Tcell、Tin，a、Tin，c

Fig.8

Output voltage when high sensitivity parameters and insensitivity parameters change"

Fig.9

Sensitivity index of operating parameters atdifferent current densities"

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