Experimental and computer performance study of an automotive air conditioning system with alternative refrigerants

摘要: Abstract A computational model with the objective of simulating performance an ideal automotive air conditioning system, working several refrigerants, is presented. The main function this was to determine most suitable alternative refrigerant for R-12. Some assumptions about losses and irreversibilities were embodied in more realistic results. effects parameters on system compatibility investigated, including evaporating temperature, condensing temperature compressor rotational speed. Five refrigerants studied by model, R-12, R-134a, R-290, R-600a a mixture propane isobutane R290/R600a (62/38, molar percentage). predicted that (R290/R600a) R-12 modifications should be performed when other are used system. major part work experimental investigation use as drop-in prototype Ninety-two (92) tests conducted both study effect four performance. These outdoor cooling load, speed soaking temperature. Three temperatures considered, 35, 40 50 °C. Six speeds employed, 700, 1000, 1500, 2000, 2500 3000 rpm, whereas loads simulated evaporator chamber, 3500 W. chamber soaked at five temperatures, 45, 50, 55, 60 65 Two types performed, single operation mode multi-operation modes tests. There close similarity between superiority pressures, energy consumption COP values, outperformed subcooling, superheating, discharge cooldown time. results showed good agreement theoretical available literature.