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

摘要： 为了探究基液氨浓度a对卡琳娜循环综合性能的影响,提出了分别以系统热效率ef、换热器经济参数AP、汽轮机尺寸参数TP、系统经济性能参数ECO和系统综合性能参数Obj作为目标函数时,基液氨浓度对其的影响.在分析经济性能和综合性能的变化情况时,采用了最优化理论中的线性加权和法对其进行了讨论.结果表明:浓度变化对不同性能参数的影响不同,随着浓度的增大,热效率ef先增大后减小,汽轮机参数TP越来越大,而参数AP、ECO、 Obj却随浓度的增大先降后升,存在最佳浓度使得各性能达到最优.同时通过对比得出不同目标函数下所对应的最佳浓度不同.汽轮机入口压力P₁一定时,各目标函数所对应的最佳浓度之间的关系为a_TP< a_ECO< a_Obj< a_ef< a_AP,且压力越大,最佳浓度越大.当P₁为1.5MPa、2MPa、2.5MPa时,系统综合性能最优,所对应的基液氨浓度分别为0.44、0.52、0.62.

关键词: 卡琳娜循环, 基液氨浓度, 热效率, 经济性能, 综合性能