低基液氨质量分数对卡琳娜循环系统(kcs-34)理论循环效率的影响

Effect of Low Ammonia Mass Fraction of the Base Solution on Theoretical Cycle Efficiency of Kalina Cycle System(kcs-34)

为探究卡琳娜循环系统(kcs-34)的热源进出口温度及质量流量均不发生变化的情况下,低基液氨质量分数a(<0.66)的变化对系统理论循环效率η的影响。通过改变蒸发器工质侧进口温度T8和富氨蒸气氨质量分数b,得出系统理论循环效率η与低基液氨质量分数a之间的关系。结果表明,在b不变的情况下,随着T8的增大,系统最大理论循环效率ηmax增大,a的取值区间呈减小趋势;在T8不变的情况下,随着b的增大,系统最大理论循环效率ηmax增大,系统最大理论循环效率ηmax对应的a值也逐渐增大,并且a的取值区间也呈增大趋势,同时,当T8保持不变并且a<0.36时,系统理论循环效率η会随着b的增大而减小,而当a>0.4时,系统理论循环效率η则会随着b的增大而增大。

In order to explore the effect of low ammonia concentration of the base solution a（0.66） on theoretical cycle efficiency of Kalina cycle system（kcs-34） η in the case of maintaining the import and export temperature and quality flow of heat source unchanged.By changing the inlet temperature of working fluid at evaporator T8 and the ammonia concentration of the rich ammonia solution b,it is obtained the relationship between the theoretical cycle efficiency η and the ammonia concentration of the base solution a.The results show that,when b is unchanged,with the increase of T8,the biggest theoretical cycle efficiency ηmax will increase,but the feasible range of a shows the tendency of decrease.When T8 is unchanged,with the increase of b,the biggest theoretical cycle efficiency ηmax and the corresponding a will both increase,and the feasible range of a also shows the tendency of increase as well,at the same time,When T8 remains unchanged and a is less than 0.36,the theoretical cycle efficiency η decreases with the increase of b,and when a is more than 0.4,the theoretical cycle efficiency η increases with the increase of b.