Experimental Study On The Cycle Performance Of BY-2#Refrigerant

Since its commercialization in1936, R22has been applied in numerous kinds ofsystems. Until now, no other refrigerant has achieved such a wide range ofcommercial capacities or applications. However, R22has caused the depletion of theozone layer and higher greenhouse effect values. Under the theme of environmentalprotection, according to the Montreal Protocol on Substances that Deplete the OzoneLayer, provisions that R22will be frozen at2015years of consumption level onJanuary1,2016, and banned the production and use on January1,2030, in a word,R22should be accelerating phased out. So, we must seek a suitable alternativerefrigerant.At present, the alternative refrigeration options which have been studied in moredetail include R407C, R32, R410A, and R134a and so on. The flammable refrigerantssuch as R32and R290are also being studied. However, strictly speaking, we have notyet been able to find any single working fluid which shows better performance thanR22.Since we can’t direct find one refrigerant which not only satisfy the requirementsof environmental protection but also has excellent thermal performance, we think weshould take a series gradual steps to research, start the research with the refrigerantwhich both ODP and GWP are less than the R22, optimize it slowly, the BY-2wasborn in this way.This article studied one kind of binary mixtures—BY-2, which had better friendlyenvironmental performance than R22, and good thermophysical properties. In thestandard secondary fluid calorimeter test bench, did test measurement with the samemachine under standard air conditioning condition, the coefficient ofperformance(COP) of BY-2was only1.7%lower than R22, but its cooling capacitywas14.6%higher; compared with R410A and R32, its COP was8%higher. Theexperimental results show that as substitutes of R22it has better thermophysicalproperties. Moreover, the results in low temperature zone show that: whenevaporating temperatures of-10to-20℃, condensation temperature of45℃, theCOP of BY-2#was slightly lower than R22, but its cooling capacity was still higher;when evaporating temperatures of-25to-35℃, R22and R410A couldn’t meet therequirement, while BY-2#still had obvious advantages. And in another test, the refrigeration speed of BY-2#was35.9%faster than R22from10℃to-18℃.Theoretical analysis and experimental results show that the environmentalperformance of BY-2is better than R22; in the low temperature area, the thermalperformance of BY-2is obviously better than R22,it can be applied to freezerefrigerated and frozen field; BY-2’s physical property is close to R22, originalequipment can be used directly without change; the price of BY-2is low, easy toobtain.Therefore, BY-2#could be considered as a promising refrigerant to R22.