PERFORMANCE OF R290 AND R1270 FOR R22 APPLICATIONS WITH EVAPORATOR AND CONDENSER TEMPERATURE VARIATION
In this study, thermal performance of 2 hydrocarbon refrigerants of R290 and R1270 is measured in an attempt to substitute R22. They are tested in a heat pump bench tester of 1 ton capacity with a hermetic rotary compressor. Water and water/glycol mixture are employed as the secondary heat transfer fluids in the test bench. All tests are conducted under the same external conditions simulating 3 different air-conditioning and heat pumping conditions. Test results show that the coefficient of performance of these hydrocarbon refrigerants is up to 11.5％ higher than that of R22 under all conditions. Refrigeration capacity of R290 is up to 8.2％ lower than that of R22 under normal air-conditioning and heat pumping conditions. Under extremely cold temperature condition, however, the capacity of R290 is 5％ higher than that of R22. On the other hand, the capacity of R1270 is similar to that of R22 under all conditions. Compressor discharge temperatures of these hydrocarbons are reduced by 14-31℃ as compared with R22. The amount of charge is reduced up to 58％ as compared with R22. Overall, these hydrocarbons provide good performance with reasonable energy savings without any environmental problem and thus can be used as long term alternatives for residential air-conditioning and heat pumping applications.
Yun-Bo SHIM In-Cheol BAEK Ki-Jung PARK Dongsoo JUNG
Graduate student, Inha University, Incheon, 402-751, Korea Department of Mechanical Engineering, Inha University, Incheon, 402-751, Korea
国际会议
The 22nd International Congress of Refrigeration(第22届国际制冷大会)
北京
英文
2007-08-21（万方平台首次上网日期，不代表论文的发表时间）