Evaluation expErimentale du R134a et de son frigorigEne alternatif A faible GWP R513A
Experimental assessment of R134a and its lower GWP alternative R513A
Abstract Lower GWP refrigerants are essential to mitigate the impact of refrigeration systems on climate change. HFO/HFC mixtures are currently considered to replace HFCs in refrigeration and air conditioning systems. The aim of this paper is to present the main operating and performance differences between R513A (GWP of 573) and R134a (GWP of 1300), the most used refrigerants for medium evaporation temperature refrigeration systems and mobile air conditioners. To perform the experimental comparison, 36 tests are carried out with each refrigerant at evaporating temperatures between −15 and 12.5°C and condensing temperatures between 25 and 35°C. The conclusion of the experimental comparison is that R513A can substitute R134a with only a thermostatic expansion valve adjustment, achieving better performance and higher cooling capacity. The discharge temperature of R513A is always lower than that of R134a. Highlights R513A is experimentally compared with R134a in a refrigeration test bench. Evaporation temperatures are varied between −15 and 12.5°C. R513A presents higher mass flow rate and cooling capacity than R134a. Despite higher power consumption, R513A COP is always above than that of R134a. R513A can substitute R134a with lower system modifications.
Refrigeration system . HFO/HFC mixtures . Drop-in replacement . Global warming potential . Energy efficiency . Climate change . Système frigorifique . Mélanges HFO/HFC . Remplacement immédiat . Potentiel de réchauffement planétaire . Efficacité énergétique . Changement climatique.
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