Pseudo Bond Graph Modeling and Experimental Investigation of Thermal Transfers Inside a Household Refrigerator

Abstract

This paper proposes a pseudo bond graph model of thermal transfers by natural convection inside a household refrigerator. It has two inputs: the ambient temperature and the temperature at the level of the evaporator wall. The latter assesses the functioning of the compressor cycles. A performance comparison, with the experimental data, was carried out in order to verify the model, in which, real measurements are used to modulate the evaporator temperature source. The simulation results show the e®ectiveness of the proposed approach.A : Heat exchange surface (m 2 Þ C v : Speci¯c heat capacity of air at 0 C (J/kg K) e : Wall thickness (m) g : Acceleration due to the gravity (m/s 2 Þ h : Heat transfer coe±cient (W/m 2 K) H : Enthalpy (J)