STUDI EKSPERIMENTAL, PENGARUH APLIKASI LIQUID TO SUCTION HEAT EXCHANGER TERHADAP KINERJA SISTEM REFRIGERASI DENGAN REFRIGERAN R 404 A

Study of performance improvement of refrigeration systems with the R404a refrigerant have been experimentally studied using a liquid to suction heat exchanger (LSHX). The use of three LSH X�s wich having each area of heat transfer 62.80 cm 2 , 75.97 cm 2 and 151.94 cm 2 is to test the system with and without LSHX at the cabin temperature setting 0°C,-10 °C and -20°C. The results of tests showed that each LSHX has heat exchange effectiveness in average of 0.35, 0.45 and 0.58. The effect of LSHX usage at refrigeration system is to increase the Coefficient of Performance (COP) with the highest increase in LSHX-1 st application which has the highest. Tests also showed that the LSHX application at low temperature settings (-10 °C and -20 o C) increase the cooling capacity, with the highest increasing in LSHX-2 nd with the medium effectiveness. While the achievement of temperature setting (chilling time) testing with LSHX is longer compared to test without LSHX, with the longest average time achievement on the test with LSHX-2