综合智慧能源 ›› 2026, Vol. 48 ›› Issue (6): 92-104.doi: 10.3969/j.issn.2097-0706.2026.06.008

• 储能与调峰技术 • 上一篇    下一篇

基于IBC的常压SOFC-GT系统构建及热力学分析

樊小朝1,2,3(), 周凯1,*(), 史瑞静1(), 张志豪3()   

  1. 1 新疆工程学院 能源工程学院乌鲁木齐 830023
    2 天山实验室新疆绿氢制储用技术重点实验室乌鲁木齐 830023
    3 新疆大学 智能科学与技术学院乌鲁木齐 830017
  • 收稿日期:2025-04-08 修回日期:2025-12-16 出版日期:2026-06-25
  • 通讯作者: *周凯(1997),男,助教,硕士,从事新能源发电与故障诊断技术等方面的研究,1505548230@qq.com
  • 作者简介:樊小朝(1979),男,教授,博士生导师,博士,从事新能源发电及储能技术等方面的研究,297546366@qq.com
    史瑞静(1980),女,教授,博士,从事新能源发电及储能技术等方面的研究,fxc0102@126.com
    张志豪(2003),男,硕士生,从事综合能源系统方面的研究,107552504969@stu.xju.edu.cn
  • 基金资助:
    国家自然科学基金项目(52266018);新疆维吾尔自治区重大科技专项(2024A01005-1);新疆维吾尔自治区重大科技专项(20252150060-3);新疆青年科技拔尖人才项目(2022TSYCCX0051);新疆青年科技拔尖人才项目(2022TSYCCX0053)

Construction and thermodynamic analysis of an IBC-based atmospheric-pressure SOFC-GT system

FAN Xiaochao1,2,3(), ZHOU Kai1,*(), SHI Ruijing1(), ZHANG Zhihao3()   

  1. 1 School of Energy EngineeringXinjiang Institute of EngineeringUrumqi 830023, China
    2 Xinjiang Key Laboratory of Green Hydrogen ProductionStorage and Utilization Technology, Tianshan LaboratoryUrumqi 830023, China
    3 School of Intelligent Science and TechnologyXinjiang UniversityUrumqi 830017, China
  • Received:2025-04-08 Revised:2025-12-16 Published:2026-06-25
  • Supported by:
    National Natural Science Foundation of China(52266018);Major Science and Technology Special Project of Xinjiang Uygur Autonomous Region(2024A01005-1);Major Science and Technology Special Project of Xinjiang Uygur Autonomous Region(20252150060-3);Xinjiang Youth Science and Technology Top-notch Talent Project(2022TSYCCX0051);Xinjiang Youth Science and Technology Top-notch Talent Project(2022TSYCCX0053)

摘要:

针对传统加压固体氧化物燃料电池-燃气轮机(SOFC-GT)混合发电系统需配置高压容器、密封结构复杂,常压固体氧化物燃料电池(SOFC)难以直接匹配常规布雷顿循环、余热利用率低、工业化应用受限的技术难题,以常压下高效回收SOFC高温尾气余热、简化系统设备构型为研究目的,依托倒置布雷顿循环(IBC)先膨胀后冷却压缩的循环特性,构建基于IBC的常压SOFC-GT混合发电系统,该系统由3个主要部分组成:燃料/空气预处理过程、IBC余热利用系统和SOFC模块。建立SOFC电化学模型,推导透平、压气机、换热器、后燃烧室等部件热力学方程,搭建以总输出功率、热效率、㶲效率为核心的评价体系;采用EBSILON软件完成系统仿真,结合温度梯度、防积碳水碳比、压缩机喘振裕度等约束确定额定工况,同时开展关键参数敏感性分析与全系统㶲平衡计算。基于EBSILON软件的热力学分析结果表明,在给定工况下,SOFC交流发电效率为58.78%,IBC余热利用系统净输出功率为33.53 kW,系统的有效能效率达60.84%,总输出效率达72.86%。结果证明,该系统无需压力容器与复杂密封,大幅降低设备成本与运维难度,发电性能显著优于传统常压耦合方案。虽然各类不可逆过程造成较大㶲损耗,系统㶲利用仍有优化空间,但72.86%的总效率充分验证了基于IBC的SOFC-GT混合发电系统的优越性能。

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

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.

Key words: solid oxide fuel cells, inverted Brayton cycle, SOFC-GT hybrid power generation system, thermodynamic analysis

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