NO COST REFRIGERATION WITH LPG GAS

Supply of continuous electricity is still not available in several areas of the country and the world. At such places, this work will be helpful for refrigeration of food, medicines, etc… This paper investigates the result of an experimental study carried out to determine the performance of domestic refrigerators. In this project a new concept for air- conditioning systems by using Liquefied Petroleum Gas (LPG) is proposed. In this work we have investigated the performance of a refrigerator by using LPG as refrigerant as LPG is locally available and is easy to transport anywhere. LPG is a byproduct in petroleum refineries and comprises 24.4% propane, 56.4% butane and 17.2% isobutene which have very low boiling point (lower than 0°C). The purpose of using LPG for refrigeration is because it is environment friendly, since it has no ozone depletion potential (ODP =0) and the combustion products of LPG are CO2 and H2O. In this project we have designed and analyzed a car ac using LPG as refrigerant. LPG is available in cylinders at high pressure. When this high pressure LPG is passed through a small internal diameter of the capillary tube, the pressure of LPG gets dropped due to expansion and phase change of LPG occurs in an isenthalpic process.