A series of water-filled trays, each 222 mm long,
Chapter 7, Problem 7.119(choose chapter or problem)
A series of water-filled trays, each 222 mm long, expe-riences an evaporative drying process. Dry air atT??300 K flows over the trays with a velocity of15 m/s, while radiant heaters maintain the surface tem- perature at Ts?330 K.(a) What is the evaporative flux (kg/s?m2) at a dis-tance 1 m from the leading edge?(b) What is the irradiation (W/m2) that should be sup-plied to the tray surface at this location to maintainthe water temperature at 330 K?(c) Assuming the water temperature is uniform overthe tray at this location, what is the evaporation rate(kg/s?m) from the tray per unit width of the tray?(d) What irradiation should be applied to each of thefirst four trays such that the corresponding evapo-ration rates are identical to that found in part (c)?
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