关键词: 卡琳娜循环, 基液氨浓度, 热效率, 经济性能, 综合性能

Abstract: In order to study the effect of ammonia concentration of base solution on comprehensive performance of the Kalina cycle system,thermal efficiency ef,economic parameter of heat exchanger AP,size parameter of turbine TP,economic parameter of system ECO,comprehensive performance parameter Obj were taken for analysis. When analyzing the changes of economic performance and comprehensive performance,the linear weighting method belonging to the optimization theory was used to discuss the effect. Ammonia concentration had different effects on different performance parameters. As ammonia concentration increased,thermal efficiency ef would first increase and then decrease,turbine parameters TP increased,but parameter AP,ECO and Obj would first decrease and then increase with increasing ammonia concentration. There was an optimum ammonia concentration which matched with each optimal performance. At the same time,the optimal ammonia concentration was different under different objective functions. When turbine inlet pressure P₁ remained constant,the relationship of the optimal ammonia concentrations corresponding to different objective functions was a_TP< a_ECO< a_Obj< a_ef< a_AP. And with increasing pressure,optimal concentration increased. When P₁ was 1.5MPa,2MPa and 2.5MPa,ammonia concentration of base solution corresponding to comprehensive performance of system was 0.44,0.52 and 0.62 respectively.

Key words: Kalina cycle, ammonia concentration of base solution, thermal efficiency, economic performance, comprehensive performance