一种新型吸收式热泵开路循环的性能分析

Performance analysis of a new open AHT cycle

对作者提出的一种可将中低温余热转化为有用蒸汽的新型吸收式热泵开路循环进行了进一步的性能分析。结果表明:发生器输出过热蒸汽的压力随发生器溶液浓度的减小(亦即冷却结晶温度的降低)而线性增大;吸收器输出饱和蒸汽的压力随吸收器溶液浓度的增加而线性增大,而投入蒸发器低温余热的温度随吸收器溶液浓度的增加而线性降低。该循环由于具有吸收溶液的冷却结晶过程,原理上可利用温度50℃左右的低温余热制取0.2MPa的饱和蒸汽。

The performance of a new open AHT cycle that author has proposed was investigated,which could generate useful process steam from medium and low temperature waste heat.Study results show that the steam pressure of generator＇s output is linearly rising with lowering of generator＇s solution concentration,or the temperature of crystallizer.The steam pressure of absorber＇s output is rising linearly with raising of absorber＇s solution concentration,and the needed temperature of waste heat supplying to evaporator is down linearly with raising of absorber＇s solution concentration.Because of heaving a step of crystallization,the new cycle can generate steam of 0.2MPa from waste heat with a temperature down to 50℃ theoretically.