ISSN Online: 2377-424X
ISBN CD: 1-56700-226-9
ISBN Online: 1-56700-225-0
International Heat Transfer Conference 13
PERFORMANCE ANALYSIS OF A FIN-TUBE HEAT EXCHANGER UNDER FROSTING CONDTIONS
要約
This paper presents a mathematical model to predict the frosting behavior of a fin-tube heat exchanger. In the model, empirical correlations for average heat transfer coefficients are used for the cold plate and circular-tube surfaces, and the diffusion equation for water-vapor is employed. Numerical results are compared with experimental data for the frost mass and the heat transfer rate of a typical fin-tube heat exchanger. The numerical results are in close agreement with the experimental data. In order to improve the thermal performance and extend the operation time of the fin-tube heat exchanger, optimal values of design parameters under operating conditions of a household refrigerator/freezer are investigated using the Taguchi method. The average heat transfer rate in this optimum model is up to 5.5% higher than that of a reference model. The operation time of the optimum model is up to 12.9% longer than that of a reference model.