American Journal of Applied Sciences

Mathematical Modeling of Drying Characteristics of Chilies in a Rotating Fluidized Bed Technique

Kittichai Triratanasirichai, Watcharin Dongbang and Worachest Pirompugd

DOI : 10.3844/ajassp.2011.979.983

American Journal of Applied Sciences

Volume 8, Issue 10

Pages 979-983

Abstract

Problem statements: The present study investigates experimentally the thin layer drying of chilies in the Rotating Fluidized Bed (RFB) technique and its mathematical modeling. Approach: The layer’s height was fixed at 4±0.5 cm. In addition, the drying air velocity and centrifugal acceleration ratio were fixed at 2 m sec-1 and G = 2.5 (106 rpm), respectively. With 6 data sets for drying air temperature between 70 and 120°C, the samples were dried from 350±5%db down to 10±1%db. Results: The drying time was in the range of 69-257 min. The chilies from sunlight appear light red. On the other hand, from the RFB, they appear dark red but can be marketable. Conclusion: The comparisons of five outstanding models are predicted. The Modified Page model gives good agreement with prediction of change in moisture ratio.

Copyright

© 2011 Kittichai Triratanasirichai, Watcharin Dongbang and Worachest Pirompugd. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.