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ISSN Online: 2377-424X
ISBN Print: 0-89116-559-2
International Heat Transfer Conference 8
MODEL STUDIES OF EVAPORATION UNDER COMBINED MICROWAVE AND CONVECTIVE HEATING
要約
A simple analytical model has been formulated to investigate the relative influence of various operating variables in evaporation under the influence of combined microwave and convective heating. A discussion of the physical mechanisms driving the system is presented and two regimes of microwave-assisted drying are defined: saturated (or boiling-point) drying and subcooled drying. The model described here concentrates on the subcooled regime. Parametric studies were carried out to explore the effects of changes in microwave power density, and air temperature, velocity, and relative humidity on temperature-time history and evaporation rate of moisture from a free surface representative of the laboratory environment. Effects of temperature-dependence of the dielectric loss factor and non-constant input power density are also investigated.