Kinetic and thermodynamic characteristics of seaweed dried in the convective air drier

Rosalam Sarbatly, and Wong, Tracy and Awang Bono, and Krishnaiah, Duduku (2010) Kinetic and thermodynamic characteristics of seaweed dried in the convective air drier. International Journal of Food Engineering, 6 (5). p. 7. ISSN 1556-3758

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Official URL: http://dx.doi.org/10.2202/1556-3758.1600

Abstract

This study reveals the drying kinetics, specific heat and enthalpy of seaweed dried in the convective air drier. Comparison between convective hot air and sun drying process was also studied. At 50°C air temperature with 23.45 percent relative humidity and 1.55 ms-1air flow rate, it has been found that the moisture removal required 4 hours to reach moisture content of 19.66 percent wet basis with its drying rate at 0.28 × 10-3 kg water h-1. The data of drying rate showed that the drying process took place in the falling rate period. The specific heat and initial enthalpy were found to be 1.3842 kJkg-1°C-1 and 1672.69 kJkg-1, respectively. It was observed that the drying kinetics, specific heat, and enthalpy values vary significantly as functions of air temperature which seem to have more effect when compared to air flow rate and seaweed loading. Hence, the best method for seaweed drying was to use convective air system rather than sun drying because it required less drying time and has better drying efficiency. © 2010 Berkeley Electronic Press. All rights reserved.

Item Type:Article
Uncontrolled Keywords:Air flow-rate, Air Systems, Air temperature, Drying efficiency, Drying kinetic, drying kinetics, drying methods, Drying process, Drying rates, Drying time, Falling-rate period, Hot air, Moisture contents, Moisture removal, Relative humidities, Sun drying, Thermodynamic characteristics
Subjects:?? SH393 ??
Divisions:SCHOOL > School of Engineering and Information Technology
ID Code:2154
Deposited By:IR Admin
Deposited On:09 Mar 2011 18:07
Last Modified:18 Feb 2015 12:07

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