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Energy and Environment, 1995

ISBN Imprimer:
1-56700-052-5

THEORETICAL AND EXPERIMENTAL RESEARCHES ON A HOUSEHOLD REFRIGERATOR-FREEZER USING R12 AND R134A

GuoLiang Ding
Institute of Refrigeration and Cryogenics, Shanghai Jiao Tong University, Shanghai 200240, China

ZhiJiu Chen
Institute of Refrigeration and Cryogenics, Shanghai Jiao Tong University, Shanghai

Résumé

A systematic study of the dynamic simulation of a household refrigerator-freezer with R12 and R134a has been made. Basic analysis method of the dynamic simulation is discussed. New evaporator and condenser models are developed by introducing void fraction. A simplified model of capillary tube can decrease calculation time and guarantee the accuracy. A refined compressor model is set up. The thermal insulation layer of a small-scale refrigerator is treated as a multi-layer thermal system. Proper calculation methods for system simulation are approached, and a software for dynamic simulation of a small-scale refrigeration appliance is developed, which can simulate different working process. Experiments has been done on a household refrigerator-freezer charged with R12 and R134a separately. The result shows that the theoretical model fits the actual system well.