Abstract: Taking geothermal heat as the heat source, KCS⁃11, KCS⁃34 and KSG⁃1 as the bottom cycles respectively, the thermodynamic and thermoeconomic performance of three systems combining flash⁃Kalina cycle and absorption refrigeration cycle (F⁃KCS11⁃ARC, F⁃KCS34⁃ARC, F⁃KSG1⁃ARC) were compared and analyzed. The results show that the total exergy loss of the F⁃KCS11⁃ARC system is 5.3% and 2.7% lower than that of the F⁃KCS34⁃ARC system and the F⁃KSG1⁃ARC system,respectively,and the component with the largest exergy loss is the heat exchanger 1. The F⁃KCS34⁃ARC system has the highest thermal efficiency, but the F⁃KCS11⁃ARC system has the highest heat recovery efficiency when the geothermal source temperature is in the range of 155～220 °C, and the smaller geothermal source temperature and flash pressure can make the system obtain higher heat recovery efficiency.Thermal economic analysis shows that pump 1 is the most expensive component in all three systems, the next is steam turbine 2. The F⁃KCS11⁃ARC system has the lowest cost, the highest annual net income, and the smallest investment recovery period, with values of 2.09×106 $, 6.61×105 $ and 3.72 years, respectively.

Key words: Geothermal, Thermodynamics, Thermoeconomics, Kalina cycle, Absorption refrigeration

摘要： 以地热为热源，分别以KCS⁃11、KCS⁃34和KSG⁃1作为底循环，针对闪蒸⁃Kalina循环与吸收式制冷循环结合的三种冷热电联供系统（F⁃KCS11⁃ARC、F⁃KCS34⁃ARC、F⁃KSG1⁃ARC），进行了热力学和热经济学性能对比分析。结果表明，F⁃KCS11⁃ARC系统的总㶲损比F⁃KCS34⁃ARC系统和F⁃KSG1⁃ARC系统分别低5.3%和2.7%，其㶲损最大的组件是换热器1。F⁃KCS34⁃ARC系统的热效率最高，但地热源温度为155～220 ℃时，F⁃KCS11⁃ARC系统的热回收效率最大，且较小的地热源温度和闪蒸压力能使该系统获得更高的热回收效率。热经济学分析表明，泵1在三个系统中是成本最高的组件，其次为汽轮机2。F⁃KCS11⁃ARC系统的成本最低，年净收入最高，而且投资回收年限最小，其值分别为2.09×106美元、6.61×105美元和3.72 a。

关键词: 地热, 　热力学, 　热经济学, 　Kalina循环, 　吸收式制冷