Thermal management of solid oxide fuel cells with liquid metal

冷却液 液态金属 计算机冷却 材料科学 热导率 空气冷却 液体燃料 核工程 热力学 化学 复合材料 机械工程 电子设备和系统的热管理 物理 工程类 有机化学 燃烧
作者
Junhua Fan,Yuqing Wang,Ran Tian,Jixin Shi,Yixiang Shi,Haishan Cao,Ningsheng Cai
出处
期刊:International Journal of Hydrogen Energy [Elsevier BV]
卷期号:48 (28): 10659-10670 被引量:2
标识
DOI:10.1016/j.ijhydene.2022.11.308
摘要

Effective thermal management of SOFCs is necessary for their long life and highly efficient operation, while the conventional method through excess air cooling is limited due to the inherently low thermal conductivity and capacity of air. In this study, a novel temperature control strategy is proposed by using liquid metal as a new kind of coolant that can work in both the stable operation stage and start-stop stage of an SOFC stack. A three-dimensional model is developed considering chemical/electrochemical reactions, mass, momentum and heat transfer processes to assess the effect of liquid metal cooling. The simulation results show that liquid metal has an excellent ability to improve the temperature uniformity and electric performance of the cell unit. The temperature difference of the cell unit cooled by air cooling is 60 K, which can be decreased to 15 K with liquid tin cooling. Furthermore, inlet air has little effect on the performance of the cell unit when liquid metal is chosen as coolant. The pumping powers of the air and liquid metal are compared at different excess air ratios and inlet velocities of liquid metal. The total pumping power consumption could be dramatically decreased when liquid metal is utilized as the coolant. Furthermore, the variations in the conductivity, heat capacity and convective resistance at different liquid metal inlet velocities are discussed.
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