简化Kalina循环系统的热力学分析

提出了一种简化Kalina循环发电系统,该系统以净功率、电力产率、热效率和换热面积比率为性能指标,分析了氨水溶液质量分数、循环倍率、热源温度、冷源温度和换热器端部温差对性能指标的影响。结果表明,氨水溶液的质量分数可以改变循环系统的性能;循环系统存在最佳的循环倍率约为4,对应的氨水溶液质量分数差范围为12%~13%;提高溶液换热器端部温差,可使电力产率增加,但系统热效率降低。

Thermodynamic Analysis of Simplified Kalina Cycle System

A Kalina cycle power system was developed. The net power output, net power output per ton of geofluid, energy efficiency, and heat exchanger area of per net power were determined as the performance criteria of the power system. The influences of ammonia water mass fraction, solution circulation ratio, geofluid temperature, cooling water temperature, and the heat exchanger end temperature difference on performance criteria were analyzed. Results showed that the performance could be changed by adjusting ammonia water mass fraction. The optimal solution circulation ratio value was about 4 and the corresponding ammonia water mass fraction difference was about 12%~13%. The net power output per ton of geofluid increases and energy efficiency decreased by increasing the heat exchanger end temperature difference.