Preliminary study on the performance of the diffusion absorption refrigerator operating with the mixed refrigerant

This paper investigated the performance of a diffusion absorption refrigerator operating with R23/R32/R134a as the mixed refrigerant, DMF (N, N-dimethylformamide) as the absorbent, helium as the auxiliary inert gas and a solution pump. The experimental results show that the high pressure mixed refrigerant can be further cooled and liquefied in the refrigerant recuperator by the low pressure mixed refrigerant, and diffuse into helium at low refrigerating temperature, then the system can reach much low refrigerating temperature, which is also benefitted from the introduce of the component R32. The feasibility of horizontal serpentine tube-in-tube recuperator in the system has been verified in experiment, but the structure of the recuperator needs to be improved as well as the processing technique and installation accuracy of the recuperator in future.