Heat Transfer in Convection Drying

Water Molar weight Mp =18 kg/kmol Evaporation enthalpy 0°C Melting enthalpy 

Mean specific heat of liquid water Mean specific heat of ice 

The Mollier h-X diagram is not the only diagram in practical use. Details of other diagrams are found in [0.17] and [5.13]. 

With the knowledge of the appropriate substance properties for several moisture systems with dry gas h-X diagrams are calculated and plotted as ready-to-use programs [5.14]. 

In convection or evaporative drying, heat is transferred from the preheated drying gas to the wet product. This heat is used to evaporate moisture from the product into 

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Mass and Heat Transfer in Convection Drying 331 Table 5-4. Required physical characteristics of air and water to evaluate the enthalpy equations. 

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