碳中和背景下高温固体氧化物电解制氢的过程建模与热力学分析

发电技术

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碳中和背景下高温固体氧化物电解制氢的过程建模与热力学分析

王丹丹，李亚楼，李芳，孙璐

电网安全与节能国家重点实验室(中国电力科学研究院有限公司)，北京市海淀区 100192

Process Modelling and Thermodynamic Analysis of Hydrogen Production by High Temperature Solid Oxide Electrolysis under the Background of Carbon Neutralization

WANG Dandan, LI Yalou, LI Fang, SUN Lu

State Key Laboratory of Power Grid Safety and Energy Conservation (China Electric Power Research Institute), Haidian, Beijing 100192

摘要/Abstract

摘要： 电解制氢能够将不稳定的可再生能源转化为氢能，实现大规模、季节性储能，是助力实现我国“碳中和”目标的关键手段之一。对高温固体氧化物电解水制氢技术进行了探讨与研究，介绍了高温固体氧化物电解的工作原理；针对其实际运行特性，建立了电解过程电化学模型与热力学模型，并通过与实验数据对比验证了模型的有效性；进一步地，分析了电流密度和操作温度对高温固体氧化物电解极化损失的影响，并研究了高温电解过程热力学性能的变化情况。结果显示，在高温下对固体氧化物电解进行整体热集成与热管理，有利于减少电能消耗；若将高温电解过程与其他工业过程结合，利用低品位的工业余热或废热，则能够进一步提升高温固体氧化物电解的整体能效。

关键词: 可再生能源制氢, 高温固体氧化物电解, 电化学模型, 热力学分析

Abstract: Water electrolysis can transform unstable renewable energy into the hydrogen energy and realize large-scale and seasonal energy storage, which is one of the key means to achieve the goal of “carbon neutralization” in China. In this paper, the technology of high temperature solid oxide electrolysis cell (SOEC) was discussed and studied, and the working principle of the high temperature solid oxide electrolysis was introduced. According to its actual operation characteristics, the electrochemical model and thermodynamic model of electrolysis process were established, and the models were verified by comparing with the experimental data. Furthermore, the effects of current density and operating temperature on the high temperature solid oxide electrolysis were analyzed, and the thermodynamic analysis was conducted. The results show that the thermal integration and management of SOEC at high temperature will be conducive to reduce the power consumption. If the high-temperature electrolysis process is combined with other industrial processes and utilized the low-grade industrial waste heat, the overall efficiency of high-temperature solid oxide electrolysis is expected to be further improved.

Key words: hydrogen production from renewable energy, high temperature solid oxide electrolysis, electrochemical model, thermodynamic analysis

王丹丹, 李亚楼, 李芳, 孙璐. 碳中和背景下高温固体氧化物电解制氢的过程建模与热力学分析[J]. 发电技术.

WANG Dandan, LI Yalou, LI Fang, SUN Lu. Process Modelling and Thermodynamic Analysis of Hydrogen Production by High Temperature Solid Oxide Electrolysis under the Background of Carbon Neutralization[J]. Power Generation Technology.