Heat and Mass Transfer Coefficients in Drying: Compilation of Literature Data

Recently reported heat and mass transfer coefficient data in drying were retrieved from literature and were classified per dryer type and material. Most of the data were available in the form of empirical equations using dimensionless numbers. All available empirical equations were transformed in the form of Heat or Mass Transfer Factors versus Reynolds Number (jH = aRe n or jM = aRe n ). In the case that more than one equations were reported for the same dryer type, a new similar equation was re-fitted to consolidate the existing literature equations. It is expected that the resulting equations are more representative and predict more accurately the heat and mass transfer coefficients. Equations for each dryer type are also proposed.