Abstract
This paper deals with a new defrosting method in which a frost layer is melted by radiative heat energy as an energy source. The far-infrared radiative heat energy having a maximum wavelength of 5.5 μm is selected as the optimum radiative heat energy source for melting of the inclined frost-layer. The inclined frost-layer melting experiments using the radiative heat energy with a discharge of melted water on a cooling copper plate are carried out under various environmental parameters (inclination angle of frost-layer, radiative heat energy flux, air temperature, cooling brine temperature) including porosity of frost-layer as a frost structural factor. The dimensionless correlation equations which predict the time taken for complete frost-layer melting are derived as a function of various nondimensional frost-layer melting parameters.
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