综合智慧能源2026，Vol.48Issue(6)：92-104,13.DOI:10.3969/j.issn.2097-0706.2026.06.008
基于IBC的常压SOFC-GT系统构建及热力学分析
Construction and thermodynamic analysis of an IBC-based atmospheric-pressure SOFC-GT system
摘要
Abstract
Traditional pressurized solid oxide fuel cell-gas turbine(SOFC-GT)hybrid power generation systems require high-pressure vessels and sophisticated high-temperature sealing structures,and the working conditions of atmospheric-pressure solid oxide fuel cells(SOFC)can hardly match those of conventional Brayton cycle,leading to low waste heat utilization rate and limited industrial application scenarios.To address the technical bottlenecks above,taking efficient recovery of high-temperature exhaust waste heat from SOFC under atmospheric pressure and simplification of system equipment configuration as the research objectives,an atmospheric-pressure SOFC-GT hybrid power generation system based on the inverted Brayton cycle(IBC)characterized by expansion prior to cooling and compression was constructed.The system consisted of three main parts:a fuel/air pretreatment process,an IBC waste heat recovery system,and a SOFC module.Thermodynamic equations for components including turbines,compressors,heat exchangers and afterburners were derived the electrochemical model of SOFC,and an evaluation system centered on total output power,thermal efficiency and exergy efficiency was constructed.The system simulation was completed using EBSILON software.According to the rated operating condition determined by temperature gradient,carbon deposition prevention steam-to-carbon ratio and compressor surge margin,the key parameter sensitivity analysis as well as system exergy balance calculation were carried out simultaneously.Thermodynamic analysis results based on EBSILON software showed that under the given operating conditions,the SOFC AC power generation efficiency reached 58.78%,the net output power of the IBC waste heat utilization system was 33.53 kW,the system's exergy efficiency reached 60.84%,and the total output efficiency reached 72.86%.The hybrid power generation system is demonstrated to have a lower equipment cost and operational difficulty without pressure vessels and complex sealing structures,and its power generation performance is significantly superior to that of the traditional atmospheric-pressure coupling configuration.Although various irreversible processes cause considerable exergy loss and there is still room for optimization in the system's exergy utilization,the total efficiency of 72.86%fully verifies the superior performance of the IBC-based SOFC-GT hybrid power generation system.关键词
固体氧化物燃料电池/倒置布雷顿循环/SOFC-GT混合发电系统/热力学分析Key words
solid oxide fuel cells/inverted Brayton cycle/SOFC-GT hybrid power generation system/thermodynamic analysis分类
能源科技引用本文复制引用
樊小朝,周凯,史瑞静,张志豪..基于IBC的常压SOFC-GT系统构建及热力学分析[J].综合智慧能源,2026,48(6):92-104,13.基金项目
国家自然科学基金项目(52266018) （52266018）
新疆维吾尔自治区重大科技专项(2024A01005-1,20252150060-3) （2024A01005-1,20252150060-3）
新疆青年科技拔尖人才项目(2022TSYCCX0051,2022TSYCCX 0053)National Natural Science Foundation of China(52266018) （2022TSYCCX0051,2022TSYCCX 0053）
Major Science and Technology Special Project of Xinjiang Uygur Autonomous Region(2024A01005-1,20252150060-3) （2024A01005-1,20252150060-3）
Xinjiang Youth Science and Technology Top-notch Talent Project(2022TSYCCX0051,2022TSYCCX0053) （2022TSYCCX0051,2022TSYCCX0053）
