【摘要】 为了实现波动电压输入下高温固体氧化物电解池（solid oxide electrolysis cell,SOEC）的有效热管理，提出了基于相变材料（phase change material, PCM）的热管理策略。建立了SOEC共电解水和二氧化碳的三维多物理场耦合模型，分析了基于PCM的热管理策略对SOEC温度、电流密度和化学反应速率等的影响。结果表明：使用PCM进行热管理能够有效抑制波动电压输入下SOEC内部的温度波动，避免SOEC内部产生剧烈的温度变化，同时能够显著提升温度均匀性。在电压从1.34 V增加至1.50 V再降至1.10 V这一动态输入过程中，使用PCM能够使电解池的最大温度从1 205 K降至1 151 K，降低了4.48%，最小温度则从1 114 K增加到了1 142 K，增加了2.51%,SOEC温度均匀性最大可达90.13%。基于PCM的热管理策略有利于SOEC长期稳定运行。更多还原

【Abstract】 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.更多还原