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Modeling for predicting frosting behavior of a fin-tube heat exchanger
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DOI：10.1016/j.ijheatmasstransfer.2005.09.022.png)
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Abstract
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A mathematical model is proposed to evaluate the frosting behavior of a fin-tube heat exchanger under frosting conditions. Empirical correlations of the heat transfer coefficients for the plate and tube surfaces and a diffusion equation for the frost layer are used to establish the model. The correlations for the heat transfer coefficients, derived from various experimental data, were obtained as functions of the Reynolds number and Prandtl number. The proposed model is validated by comparing the numerical results with experimental data for the frost thickness, frost accumulation, and heat transfer rate. The numerical results agree well with the experimental data. It is also found that this model can be applied to evaluate the thermal performance of a common fin-tube heat exchanger under frosting conditions. (c) 2005 Elsevier Ltd. All rights reserved.
Keywords:
heat and mass transfer
frost
fin-tube heat exchanger
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