LNG冷能用于天然气电厂二级循环发电的研究  

Study on Secondary Cycle Power Generation Using LNG Cold Energy in Natural Gas Power Plant

作　　者：韩逸骁 管延文[1] 刘文斌[1] 卢鉴莹 杨云[1] 蔡磊[1] 郭启华 吴勇 HAN Yixiao GUAN Yanwen LIU Wenbin LU Jianying YANG Yun CAI Lei GUO Qihua WU Yong

机构地区：[1]华中科技大学环境科学与工程学院,湖北武汉430074 [2]中国市政工程中南设计研究总院有限公司,湖北武汉430010

出　　处：《煤气与热力》2017年第3期49-53,共5页Gas & Heat

摘　　要：通过ASPEN PLUS软件构建新型二级循环发电系统,一级循环(蒸汽循环)的循环工质水通过换热器吸收烟气中的余热后进入蒸汽轮机做功,LNG作为二级循环(CO_2循环)的冷源,将蒸汽循环中水蒸气乏汽的余热作为CO_2循环的热源。通过敏感度分析对系统工况进行优化,二级循环发电系统净发电效率达到78.2%,与单级循环发电系统相比,系统净发电效率绝对值提高32.4%。A novel secondary cycle power gen- eration system is built by the ASPEN PLUS software. The cycle fluid in the primary cycle （steam cycle ） works in the turbine after absorption of residual heat from the flue gas in the heat exchanger. The LNG is taken as the cold source of the secondary cycle （CO2 cycle）, and the residual heat from waste steam in steam cycle is taken as the heat source of CO2 cycle. The system operating conditions are optimized by sensi- tive analysis. The net power generation efficiency of the secondary cycle power generation system reaches 78.2%, and is 32.4% more than that of the single cycle power generation system.

关 键 词：LNG冷能 ASPEN PLUS软件模拟 二级循环发电 循环工质 

分 类 号：TM611[电气工程—电力系统及自动化]