冷前回热式Kalina循环系统(KCS)34g的热力学分析

提出冷前回热式KCS34g,根据热力学第一定律和第二定律,利用EES软件对该循环进行热力性能分析,并与基本KCS34g进行相同条件下的性能对比,研究透平进口压力、氨质量分数和透平出口压力变化对冷前回热式KCS34g性能的影响。研究结果表明:在额定工况下,冷前回热式KCS34g的热效率为11.93%,比基本KCS34g高0.99%;效率为52.26%,比基本KCS34g高4.34%;随着氨质量分数增大和透平出口压力降低,冷前回热式KCS34g热效率、发电量和效率均增大;随着透平进口压力增加,冷前回热式KCS34g热效率逐渐增加,发电量和效率在29 bar时达到最大。

Thermodynamic analysis of regeneration-before-condensation type KCS34g

A regeneration-before-condensation type KCS34g（Kalina cycle system34g）is proposed.Based on the first and second law of thermodynamics,the thermodynamics performance of the proposed cycle is simulated and analyzed using the EES software,and its performance is compared with the basic KCS34 g at the same condition.This type cycle＇s influencing factors are also studied,including the inlet pressure of turbine,mass fraction of ammonia-water mixture and the outlet pressure of turbine.The results indicate that the thermal efficiency and the exergy efficiency of regeneration-before-condensation type KCS34 g are 11.93% and 52.26%,increased by 0.99%,4.34% compared with basic KCS34 g,respectively,under the rated conditions.Its thermal efficiency,power output and exergy efficiency can be improved by increasing the mass fraction of ammonia-water mixture or decreasing the outlet pressure of turbine.Its thermal efficiency increases as the inlet pressure of turbine increases,and the power output and exergy efficiency reach the maximum value when the inlet pressure of turbine is 29 bar.