High Energy Efficiency Air Conditioning

摘要: This project determined the performance of a new high efficiency refrigerant, Ikon B, in residential air conditioner designed to use R-22. The refrigerant R-22, used and small commercial conditioners, is being phased out production developed countries beginning this year because concerns regarding its ozone depletion potential. Although replacement R-410A, available, it operates at much higher pressure than R-22 requires equipment. conditioners will continue be for many years come. Air conditioning large part expensive summer peak power parts U.S. Previous testing computer simulations B indicated that would have 20 - 25% coefficient (COP, amount cooling obtained per energy used) an air-cooled conditioner. In project, typical was obtained, installed environmental chamber, instrumented, run both with original charge then B. controlled temperature humidity could maintained obtain repeatable comparable results. Tests included runs andmore » without controller, extended several months subsequent analyses check compatibility materials lubricant. Baseline measured 90 deg F 100 F. After changeover larger expansion orifice, proved about 19% COP 26% versus had 20% lower capacity 17% system. All results over multiple were within 1% relative standard deviation (RSD). these values agree well previous not concern unless particular near maximum application. Typically, oversized A/C systems are by contractors cover contingencies. which lasted 4.5 ambient 68% compressor on time, performed no significant loss efficiency. Post-run analysis lubricant oil, compressor, outlet tubing, filter/dryer showed minor effects but nothing considered significant. very successful. objectives achieved, indicates can easily retrofitted into give 15 savings 1 3 payback retrofit costs depending location use. has potential successful product.« less