吸收循环卡诺模型及大温差系统理论效率

Carnot Model and Theoretical Efficiency of Large-Temperature-Difference of Absorption Cycle

为了简化吸收循环热力学分析方法,通过吸收循环和压缩式循环的对比,提出吸收循环卡诺模型分析方法。分析了吸收循环内部的能量转换,提出适合冷水大温差的改进的双蒸发器-双吸收器吸收循环系统,并建立了改进系统的卡诺模型,并推导出其理想循环的理论效率表达式。在此基础上分析了不同热源和相关参数对理论效率的影响,并与简单吸收循环进行了对比分析。结果表明改进系统可以有效提高吸收循环效率。

The Carnot analysis method was proposed for the simplification of the thermodynamic analysis of the absorption cycle, by the comparison of the absorption cycle and the compression cycle. The system with two evaporators and two absorbers that is suitable for the large temperature difference of chilling water was developed through the investigation of the energy conversion in the cycle. In addition, the Camot model of the present system was established and its efficiency of the ideal cycle was obtained. Then the effects of the different heat resources and relevant parameters on the efficiency were evaluated and the efficiency difference between the present system and the simple cycle was compared. The present system with two evaporators and two absorbers may improve the efficiency of the absorption cycle.