Document Detail

A review of thin layer drying of foods: theory, modeling, and experimental results.
MedLine Citation:
PMID:  20373189     Owner:  NLM     Status:  MEDLINE    
Drying is a complicated process with simultaneous heat and mass transfer, and food drying is especially very complex because of the differential structure of products. In practice, a food dryer is considerably more complex than a device that merely removes moisture, and effective models are necessary for process design, optimization, energy integration, and control. Although modeling studies in food drying are important, there is no theoretical model which neither is practical nor can it unify the calculations. Therefore the experimental studies prevent their importance in drying and thin layer drying equations are important tools in mathematical modeling of food drying. They are practical and give sufficiently good results. In this study first, the theory of drying was given briefly. Next, general modeling approaches for food drying were explained. Then, commonly used or newly developed thin layer drying equations were shown, and determination of the appropriate model was explained. Afterwards, effective moisture diffusivity and activation energy calculations were expressed. Finally, experimental studies conducted in the last 10 years were reviewed, tabulated, and discussed. It is expected that this comprehensive study will be beneficial to those involved or interested in modeling, design, optimization, and analysis of food drying.
Zafer Erbay; Filiz Icier
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Review    
Journal Detail:
Title:  Critical reviews in food science and nutrition     Volume:  50     ISSN:  1549-7852     ISO Abbreviation:  Crit Rev Food Sci Nutr     Publication Date:  2010 May 
Date Detail:
Created Date:  2010-04-07     Completed Date:  2010-06-29     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8914818     Medline TA:  Crit Rev Food Sci Nutr     Country:  England    
Other Details:
Languages:  eng     Pagination:  441-64     Citation Subset:  IM    
Graduate School of Natural and Applied Sciences, Food Engineering Branch, Ege University, Izmir, Turkey.
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MeSH Terms
Food Analysis*
Food Handling / methods*
Food Preservation / methods*
Models, Theoretical
Water / chemistry*
Reg. No./Substance:

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