The major reason for the depletion of the ozone layer is refrigerants from to refrigeration system, instead of that to hydrocarbons(HC) like liquefied petroleum gas(LPG) is proposed as working fluid in refrigeration system .The hydrocarbons while used as a refrigerant posses many good characteristics such as:-very low cost, nontoxic, zero ozone layer depletion potential, strong compact ability. To safeguard the depleting ozone layer LPG is the perfect option. This system works by the expansion of LPG from its form to gaseous form resulting in decrease of pressure and increase in volume of the LPG. By this the temperature drop occurs and makes a refrigerant effect. This cooling effect can be utilized for refrigeration work. For heating purposes the same gas is again utilized after the cooling cycle.