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Heat transfer during frying of potato slices
Date
1999-01-01
Author
Şahin, Serpil
Sastry, SK
Bayindirli, L
Metadata
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This work is licensed under a
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
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The convective heat transfer coefficient during deep-fat-frying of potatoes was determined at different temperatures. The temperature, 0.1 cm below the top and bottom surfaces of a 0.05 x 0.05 x 0.005 m potato sample was monitored over rime. The thermal conductivity and specific heat of the sample were expressed as a function of rime, and the data were analyzed using the heat transfer equation with an explicit finite difference method. Crust formation occurred primarily at the bottom surface of the potato slice. Therefore, the frying was examined at the bottom surface; before and after the crust formation. The convective heat transfer coefficient ranged between 300 to 335 W/m2 degrees C for the top, and 450 to 480 W/m2 degrees C for the bottom surface before crust formation. After dust formation, it varied between 70 to 150 W/m(2)degrees C for the bottom surface within the studied temperature range of 150 to 190 degrees C.
Subject Keywords
Food Science
URI
https://hdl.handle.net/11511/37633
Journal
FOOD SCIENCE AND TECHNOLOGY-LEBENSMITTEL-WISSENSCHAFT & TECHNOLOGIE
DOI
https://doi.org/10.1006/fstl.1998.0494
Collections
Department of Food Engineering, Article