Application concept of variable effective surface film conductance for simultaneous heat and mass transfer analysis during air blast cooling of food

Heat and mass transfer analyses are made from exposed food during air blast cooling by using the concept of temperature dependent surface film conductance. An empirical correlation, developed and reported by the first author and his co-workers earlier, was used to calculate the surface film conducta...

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Bibliographic Details
Published in:Energy conversion and management 1999-03, Vol.40 (5), p.567-574
Main Authors: Ansari, F.A., Khan, S.Y.
Format: Article
Language:English
Subjects:
Biological and medical sciences
Effective film conductance
Food
Food engineering
Food industries
Fundamental and applied biological sciences. Psychology
General aspects
Heat transfer
Mass transfer
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Summary:Heat and mass transfer analyses are made from exposed food during air blast cooling by using the concept of temperature dependent surface film conductance. An empirical correlation, developed and reported by the first author and his co-workers earlier, was used to calculate the surface film conductance of fruit and vegetable samples through transient temperature time measurements. Its effective value was found to decrease with diminishing temperature. The variation was regressed to obtain a linear correlation. When this was used to solve the one-dimensional heat conduction equation with pure convection surface boundary condition equation, a good overall agreement was observed between the computed and the measured temperature variations. The proposed concept simplifies the solution of simultaneous heat and mass transfer problems.
ISSN:0196-8904
1879-2227
DOI:10.1016/S0196-8904(98)00129-0