Portable Domestic Refrigerator: A Design Approach

Abstract

This project work is designed mainly for the preservation of foodstuffs, storing of medicines and the cooling of water and drinking fluids in our homes and offices. In the choice of the necessary parameters for the design, Dichlorodifluoromethane, Freone (R12) is used as the refrigerant. An evaporating pressure of 1.237 bar and condensing pressure of 13.66 bar and corresponding temperatures of -25°c and 55°c was considered and the volume of the inside of the refrigerator was fixed at O.2m³ (200litres). The power of the compressor of the refrigerator is 46W. The cooling load as estimated has been assumed and coefficient of performance was calculated arid the various design components such as the compressor, condenser, capillary tube were analyzed. The parameters have indeed facilitated the successful design of this refrigerator.

Keywords: Refrigerator, Compressor, Condenser, Evaporator, Expansion device