Dimensionless correlations of frost properties on a cold plate |
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Authors: | Dong-Keun Yang Kwan-Soo Lee |
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Affiliation: | a Graduate School, Department of Mechanical Engineering, Hanyang University, 17 Haengdang-dong, Sungdong-gu, Seoul 133-791, South Korea;b School of Mechanical Engineering, Hanyang University, 17 Haengdang-dong, Sungdong-gu, Seoul 133-791, South Korea |
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Abstract: | This study proposes dimensionless correlations for predicting the properties of frost formed on a cold plate. Frosting experiments are carried out to obtain the correlations with various environmental parameters including the air temperature, air velocity, absolute humidity, and cooling plate temperature. The thickness, density, surface temperature, effective thermal conductivity, average heat and mass transfer coefficients of the frost layer are correlated as functions of the Reynolds number, Fourier number, absolute humidity, and dimensionless temperature by using a dimensional analysis. The correlations proposed in this study agree well with the experimental data within a maximum error of 10%, and can be used to predict the average frost properties in the following ranges: the air temperature of 5–15 °C, air velocity of 1.0–2.5 m s−1, absolute humidity of 0.00322–0.00847 kg kga−1, and cooling plate temperature of −35–−15 °C. |
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Keywords: | Frost Frost plate Calculation Correlation Fourier Reynolds Heat transfer Mass transferGivre plaque plane Calcul Corré lation Fourier Reynolds Transfert de chaleur Transfert de masseThermoacoustique Machines thermiques Empilement Ré seaux |
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