氨水工质浓度可调型功冷联供循环  

AMMONIA-WATER POWER/REFRIGERATION COGENERATION SYSTEM WITH ADJUSTABLE CONCENTRATIONS

作　　者：张娜[1] 刘猛[1,2] 赵洪滨[3] 

机构地区：[1]中国科学院工程热物理研究所,北京100190 [2]中国科学院研究生院,北京100039 [3]中国石油大学,北京102249

出　　处：《工程热物理学报》2008年第5期726-730,共5页Journal of Engineering Thermophysics

基　　金：国家自然科学基金(No．50576096)

摘　　要：本文提出一个新型氨水工质功冷联供循环,由氨水Rankine子循环和氨吸收式制冷子循环通过吸收、分离及换热过程耦合而成,可采用燃气轮机排烟等中低温热源驱动.通过设置分流、吸收式冷凝实现系统内氨水工质浓度变换,兼顾动力子循环加热蒸发和冷凝过程不同的浓度需求,达到改善换热过程匹配和提高透平作功能力的目的.计算表明,当透平进气温度为450℃时,循环热效率达25%～28%。(火用)效率达45%～53%;且存在最佳分流比使热效率及(火用)效率达到最佳.A novel ammonia-water system for power and refrigeration cogeneration is proposed and investigated. In this system, an ammonia-water Rankine-like subcycle and an ammonia absorption refrigeration subcycle are interconnected by absorbers, splitters and heat exchangers; the low/middle level temperature heat energy, including the gas turbine exhaust heat can be used to drive the system. In order to achieve better heat transfer performance and higher specific work output, the concentrations of ammonia-water are adjusted to accommodate the different concentration requirements in the heat addition and rejection processes of power subcycle. Calculation results indicate that the system thermal and exergy efficiencies reach 25%-28% and 45%-53%, respectively, with the turbine inlet temperature of 450℃; in addition, it is found that there are optimum splitting fractions at which the thermal and exergy efficiencies reach their maximums.

关 键 词：分流比 浓度调节 氨水工质 功冷联供 

分 类 号：TK123[动力工程及工程热物理—工程热物理]