Evaluation of the possibility of using propane and hydrofluorolefin group refrigerants as an eco-friendly replacement for R134a in combined heat transformers

Abstract

In connection with the gradual reduction in the use of refrigerants of HFC groups, regulated by the Paris Agreement, its amendments and additions, the question arises of finding environmentally friendly working fluids with high thermodynamic efficiency in the thermal transformer cycle. The article discusses the possibility of using refrigerants from the HFO and propane group as environmentally friendly substitutes for R134a for combined vapor compression thermal transformers. The evaluation of the thermodynamic efficiency of the machines for the joint production of heat and cold, produced on the basis of the entropy method of thermodynamic analysis, is carried out. The results of modeling a single-stage combined heat transformer showed the thermodynamic feasibility of using R290 as a substitute for R134a. The analysis of the results obtained showed the limited possibility of effective use of refrigerants of the HFO group as working bodies of combined heat transformers.