NDLI: Equilibrium moisture content and latent heat of vaporization of grapes

Content Provider	IEEE Xplore Digital Library
Author	Enayet, M.M. El-Ghetany, H.H.
Copyright Year	2002
Description	Author affiliation: Mech. Eng. Dept., Cairo Univ., Egypt (Enayet, M.M.)
Abstract	Drying process is a heat and mass transfer phenomenon where water migrates from the interior of the drying product on to the surface from where it evaporates. The equilibrium moisture content is used to determine whether a product will gain or lose moisture under a given set of temperature and relative humidity conditions. The grapes are in equilibrium with their surrounding conditions of temperature and relative humidity when the vapor pressures or the surrounding air are in equal with the vapor pressures corresponding to the saturation temperatures of water inside the grapes. In the present study, two empirical equations for equilibrium moisture content and latent heat of vaporization of grapes are presented. A test rig has been designed and constructed to obtain the available experimental data used to fit the empirical equations. These two formulae are very important to evaluate the drying rate of the grapes at a particular condition and also to calculate the correct values of latent heat of grapes as a function of equilibrium moisture content.
Starting Page	664
Ending Page	667
File Size	269385
Page Count	4
File Format	PDF
ISBN	0780372964
DOI	10.1109/IECEC.2002.1392125
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2002-07-29
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Moisture Pipelines Temperature Water heating Humidity Heat transfer Equations Power engineering and energy Solar energy Testing
Content Type	Text
Resource Type	Article

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