Abstract
A numerical study to propose a design methodology for the optimal design of the hot water preheating path for the refrigerator foaming jig has been conducted. The zero-dimensional prediction program based on the lumped-capacitance method was developed for the preliminary design of the flow path. Three design procedures for determining the flow path and flow rate were examined. Detailed flow path design was achieved by using the three-dimensional Computational Fluid Dynamics (CFD) procedure. Calculated results of temperature variation over time from the 0D solver were compared with those from the 3D calculations. The experimental results were also used to validate the present numerical methods. Finally, the optimal design of the flow path having a semi-parallel flow path showed the improvement of the temperature uniformity less than 5 degrees, compared with the conventional design path system. Details of the design methodology, corresponding quantitative results, and comparison with experimental data are summarized.
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