Abstract: Compared with polyurethane foam, VIP is a more efficient heat preservation and energy saving material. In this paper, heat transfer theory and engineering experience formula were used to analyze the composite two-dimensional heat transfer of polyurethane and VIP. The heat transfer model of the refrigerator was established, and the establishment of thermal load transfer model of refrigerator, through the thin film heat flux sensor test correction, and the prototype verification of energy consumption. The results show that the model predicts the results of heat load and energy consumption test results can be controlled within 6% by considering the difference of foam in different boxes.

Key words: VIP, Two-dimensional heat transfer, Heat transfer model, Heat flow sensor