以硝酸钾水溶液为工质的吸收式热变换器的模拟计算

Study of Absorption Heat Transformers Using Alkitrate as the Working Pair

对以硝酸钾水溶液为工质的单级、双级、三级吸收式热变换器循环进行了计算机模拟计算。结果表明在余热温度为１０５ ℃的情况下， 以硝酸钾水溶液为工质的热变换器输出温度可达２５０ ℃， 显示了该工质在高温热变换器领域的良好应用前景。通过与水－ 溴化锂吸收式热变换器循环的比较也表明， 以硝酸钾水溶液为工质的吸收式热变换器循环具有更高的ＣＯＰ。

Absorption heat transformers with Alkitrate as the working pair have been investigated. The performance parameters of single-stage,double-stage and triple-stage cycles are calculated by a computer-simulation model. Under the condition that the waste heat supply temperature is 105℃, it is showed from the result that the output heat temperature is up to 250℃. It is very useful in high temperature heat transformers. A comparison of Alkitrate cycles with H 2O-LiBr cycles is also illustrated. It is concluded that the COPs of Alkitrate cycles are better than those of H 2O-LiBr cycles.