In order to achieve efficient heat management of high temperature solid oxide electrolysis cell(SOEC)under fluctuating voltage input,a heat management strategy based on phase change material(PCM)was proposed.A three-dimensional multiphysics model for co-electrolysis of H2O/CO2 in SOEC was established to analyze the impact of PCM-based thermal management strategies on SOEC temperatures,current densities,and chemical reaction rates.The results indicate that using PCM for thermal management can effectively suppress temperature fluctuations inside the SOEC under fluctuating voltage input,preventing drastic temperature changes while significantly improving temperature uniformity.During a dynamic input process from 1.34 V to 1.50 V and then down to 1.10 V,the use of PCM reduces the maximum temperature of the cell from 1 205 K to 1 151 K,a decrease of 4.45%.The minimum temperature,on the other hand,increases from 1 114 K to 1 142 K,a 2.46%increase.The temperature uniformity of the SOEC can also be improved up to 90.13%.The use of PCM-based thermal management strategies is beneficial for ensuring the long-term stable operation of SOEC.
关键词
电制合成燃料/固体氧化物电解池/共电解/热管理/相变材料
Key words
electro-synthetic fuel/solid oxide electrolysis cell/co-electrolysis/thermal management/phase change material
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