Mathematical model for steady-state regime in domestic refrigeration

Abstract

Domestic refrigeration is responsible for more than 10% of the consumption of the electricity in Brazil. This explains the efforts of the industry to produce more efficient domestic refrigerators and freezers. Moreover, better efficiency is the key to improve their share of the consumer market. Mathematical modeling is the first step for the developing of a computational code able to simulate all operations of a domestic refrigerator. The present work analyses each of the basic parts of a refrigeration system: compressor, condenser, capillary tube, suction-line heat exchanger and evaporator. The conservation equations are applied to mass and energy and the equations for entropy are used to entropy generation and exergy destruction analyze, besides the heat transfer equations.