基于空气布雷顿循环的海上油气平台发电燃气轮机余热回收系统热力性能分析  

Thermodynamics analysis of air Brayton cycle for waste heat recovery of the gas turbine on off-shore platforms

作　　者：张强 宁帅晴 陈晨 ZHANG Qiang;NING Shuaiqing;CHEN Chen(School of Energy and Power Engineering,Jiangsu University of Science and Technology,Zhenjiang 212003,China)

机构地区：[1]江苏科技大学能源与动力学院,镇江212003

出　　处：《江苏科技大学学报（自然科学版）》2019年第1期39-44,共6页Journal of Jiangsu University of Science and Technology:Natural Science Edition

基　　金：江苏科技大学博士科研启动基金资助项目(635321302)

摘　　要：针对海上油气平台某发电用燃气轮机排气余热源,设计了以空气为工质的布雷顿循环余热回收系统.在建立二级压缩中间冷却余热利用系统的热力学、经济学分析模型基础上,计算时考虑了空气的变比热特性,分析了系统余热回收工作过程的热力性能,获得了涡轮进口空气温度、压气机总压比和压气机压比分配对系统性能参数的影响规律.结果表明,系统最优的动力性指标和经济性指标对应的压气机总压比不同,当压气机压比分配比例为6∶4时,系统可以较好地兼顾动力性和经济性性能指标.The thermal design scheme based on air Brayton cycle is proposed to recover the waste heat of a gas turbine in off-shore platforms. Thermodynamic and economic analysis models with two stage compressors and intercooling are built. Thermodynamic analysis of working process considering the variation of air specific heat is conducted in detail. The effects of the total pressure ratio, turbine inlet temperatures, and compressor pressure ratio distribution on system performance are obtained parametrically. Results based on process simulation show that the total pressure ratio for the optimal thermodynamic performance is different from the value calculated using the economic performance as optimal objective. The system could get better trade-off between thermodynamic and economic performances when the compressor pressure ratio distribution is 6∶4.

关 键 词：布雷顿循环 燃气轮机 余热利用 海上油气平台 模拟 

分 类 号：TK421.8[动力工程及工程热物理—动力机械及工程]