Study on heat dissipation performance of polymer electrolyte membrane fuel cell reactor based on ultra-thin uniform temperature plate

doi:10.19799/j.cnki.2095-4239.2023.0372

Abstract

Abstract:

An ultra-thin homogeneous temperature plate was proposed as the target heat dissipation structure to improve the heat dissipation performance of a polymer electrolyte membrane fuel cell reactor. The calculation model of a hydrogen fuel cell reactor based on the uniform temperature plate was established using the theoretical calculation and experimental verification methods and explored the influence of the heat transfer coefficient of the evaporation section of the uniform temperature plate and the arrangement angle on the heat dissipation performance of the target battery reactor. The results showed that the average temperature and the temperature uniformity index of the target cell stack decrease with the increase of the convective heat transfer coefficient in the condensation section of the temperature homogenizer. The average temperature and temperature uniformity of the battery stack are better than those of the anti-gravity arrangement at gravity and horizontal arrangement angles. With an increase in load, the maximum average temperature of the target battery stack should not exceed 341.15 K, the temperature uniformity index must be less than 1.1, and the maximum temperature difference must be 4.1 K. The ultra-thin temperature equalizing plate can effectively dissipate heat from the target battery stack and has excellent temperature distribution.

Key words: fuel cell, uniform temperature plate, temperature distribution, layout angle, convective heat transfer coefficient

CLC Number:

TK 172

Jianqing YANG, Renhong LUO, Rong CUI, Zhifeng WANG, Yihan LI. Study on heat dissipation performance of polymer electrolyte membrane fuel cell reactor based on ultra-thin uniform temperature plate[J]. Energy Storage Science and Technology, 2023, 12(9): 2962-2970.

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名称	数值
阳极流道深度/mm	0.3
阳极流道宽度/mm	1.1
阳极肋板宽/mm	1.8
阴极流道深度/mm	0.4
阴极流道宽度/mm	1.1
阴极肋板宽/mm	1.0
催化面积/cm²	19.0
气体扩散层厚度/μm	234.0
电池活性面积/cm²	80.0

项目	蒸发段平均温度/K	蒸发段平均温度误差/%	热阻/(K/W)	热阻误差/%
试验值	319.73	1.41	0.88	3.41
计算值	315.21	1.41	0.85	3.41

名称	数值
阳极电流密度/(A/m²)	7.8
阳极电荷转换系数	1.1
阳极浓度指数	1.0
阳极Pt负载量/(mg/cm²)	0.27
H₂O在阳极扩散/(m²/s)	4.0×10^-5
阴极电流密度/(A/m²)	7.2×10^-4
阴极电荷转换系数	1.1
阴极浓度指数	1.0
阴极Pt负载量/(mg/cm²)	0.53
H₂O在阴极扩散/(m²/s)	4.0×10^-5
H₂参考浓度/(mol/m³)	0.89
H₂扩散/(m²/s)	4.0×10^-5
O₂参考浓度/(mol/m³)	0.89
O₂扩散/(m²/s)	4.0×10^-5
扩散层孔隙率	0.7
催化剂层孔隙率	0.5
催化剂层渗透/m²	10¹²
膜当量/(kg/mol)	1.1
集流板导热系数/[W/(m·K)]	100
集流板电导率/(S/cm)	1×10⁴
扩散层导热系数/[W/(m·K)]	10
扩散层电导率/(S/cm)	2.8
催化剂层导热系数/[W/(m·K)]	10
催化极层电导率/(S/cm)	50
聚合物电解质膜导热系数/[W/(m·K)]	0.16

仪器	型号	误差值
数据采集仪	YOGOKAWA	±0.02 ℃/±2 mV
电子负载机	JT6332	±0.0015%
热电偶	GGK-30	±0.02 ℃

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