一种新型的串联型三效溴化锂吸收式制冷循环的分析

Analysis on a new triple - effect lithium bromide absorption cycle with series solution circuit

为了缓解基本的串联三效溴化锂吸收式制冷循环中的高温溶液腐蚀问题,本文提出一种新型的串联型三效溴化锂吸收式制冷循环,即在基本的串联三效循环的中压和低压发生器之间加一个压缩装置,并对该循环进行优化计算。计算结果表明,这种新型的循环可以大幅度降低循环的最高溶液温度至低于180℃,COP可达1.59,循环的COP随着高发出口溶液温度的增加而增加,随着压缩比的增加而减少。

The conventional triple - effect absorption chiller using the lithium bromide - based working fluid has been greatly hindered by the corrosion problem caused by the high temperature. To solve the problem, a new triple - effect lithium bromide absorption cycle with series solution circuit, which is combined with an additional vapor compression device, has been carried out. The analysis based on optimization shows that it can notably reduce the highest temperature of solution in the cycle to a value lower than 180°C ,and achieve a higher COP of 1.59. The COP of the new cycle increases with increasing GH temperature, and decreases with increasing compression ratio.