Modified ozone-friendly refrigerant mixtures as substitutes for R22

Abstract
New modified ozone-friendly mixed refrigerants have been offered to replace the ozone-destroying R22 in refrigerating equipment: 0.8RC318/0.2E170,  0.96R507a/0.04E170 and  0.8R507a/0.2E170. A constant-volume piezometer was used to study the pressure of mixed refrigerants on the boiling line in the unit with a liquid expansion thermostat. A heat pump bench was used to test the performance of the modified refrigerants employing mineral and synthetic refrigerator oils. The offered way to modify ozone-friendly refrigerants makes it possible to expand the assortment of known ozone-friendly refrigerant mixtures for the working refrigerating equipment. The results of this research will help to considerably cut down the expenses for retrofitting such refrigerating equipment.