LITERATURE REVIEW ON LPG REFRIGERATION SYSTEM

Abstract

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 refrigerator when a liquefied petroleum gas (LPG) which is
locally available which comprises of 24.4% propane, 56.4% butane and 17.2% isobutene which is varied from company
to company is used as a Refrigerant. The LPG is cheaper and possesses an environmental friendly nature with no Ozone
Depletion Potential (ODP) and no Global Warming Potential (GDP). It is used in world for cooking purposes.
The refrigerator used in the present study is designed to work on LPG. The performance parameters investigated is the
refrigeration effect in certain time. The refrigerator worked efficiently when LPG was used as a refrigerant instead of
R134a.
Also from the experiment which done in atmospheric condition, we can predict the optimum value of cooling effect with
the suitable operating condition of regulating valve and capillary tube of the system. The use of LPG for refrigeration
purpose can be environment friendly since it has no ozone depletion potential (ODP). Usually LPG is used as a fuel for
cooking food in houses, restaurants, hotels, etc..and the combustion products of LPG are CO2 and H2O. In this project we
have designed and analyzed a refrigerator using LPG as refrigerant.
LPG is available in cylinders at high pressure. When this high pressure LPG is passed through the capillary tube of small
internal diameter, the pressure of LPG is dropped due to expansion and phase change of LPG occurs in an isoenthalpic
process. Due to phase change from liquid to gas latent heat is gained by the liquid refrigerant and the temperature drops.
In this way LPG can produce refrigerating effect for a confined space. From experimental investigations, we have found
that the COP of a refrigerator which uses LPG is higher than a domestic refrigerator.This work investigates the result of an
experimental study carried out to determine the performance of domestic refrigerator when a propane-butane mixture
is liquefied petroleum gas (LPG) which is locally available and comprises 24.4% propane, 56.4% butane and 17.2%
isobutene which is very from company to company. The LPG is cheaper and possesses an environmental friendly nature
with no ozone depletion potential (ODP). It is used in world for cooking purposes. The various methods of refrigeration
on the basis of standard refrigerant discussed. He refrigerator used in the present study is of medium size with a gross
capacity of 125 litre and is designed to work on LPG. The performance parameters investigated is the refrigeration effect
in certain time. The refrigerator worked efficiently when LPG was used as refrigerant instead of CFC 12. The evaporator
temperature reached -5 ºC with and an ambient temperature of 12 ºC. Also from the experiment which done in
atmospheric condition, we can predict the optimum value of cooling effect with the suitable operating condition of
regulating valve and capillary tube of the system. The results of the present work indicate the successful use of this
propane-butane mixture as an alternative refrigerant to CFC 12 in domestic refrigerant.