Heat-driven absorption refrigeration technology is an important approach for solar-energy utilization and industrial-waste heat recovery. Among them

the generation and absorption heat exchange (GAX) absorption cycle exhibits a high efficiency whose coefficient of performance (COP) can vary with the heat-source temperature. This paper proposes the use of an ionic liquid–water working pair without crystallization risk for the GAX absorption cycle. The NRTL model is utilized to calculate the thermal physical properties of the ionic liquid–water working pair

and the performance of the GAX absorption refrigeration cycle is calculated based on the working-pair properties. The results showed that the [DMIM][DMP]/water solution can be used in the GAX absorption cycle and achieves a COP of 1.02

which is 27.5% higher than that in a single-effect cycle. In addition

the results show that the ionic liquid–water absorption cycle achieves better performance than the LiBr–water absorption cycle.