Effective moisture diffusivity, moisture sorption, thermo-physical properties and infrared drying kinetics of germinated paddy
Temperature and relative humidity (RH) dependence of moisture sorption phenomena for agricultural products provide valuable information related to the thermodynamics of the system. So the equilibrium moisture contents (EMC), effective moisture diffusivity (Deff) and thermo-physical properties in t...
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doaj-1d4ef50073574d19a56490d6c0fecfd92020-11-25T00:38:13ZengPrince of Songkla UniversitySongklanakarin Journal of Science and Technology (SJST)0125-33952014-02-01361115124Effective moisture diffusivity, moisture sorption, thermo-physical properties and infrared drying kinetics of germinated paddySupawan Tirawanichakul0Supanee Wanthong1Yutthana Tirawanichakul2Department of Chemical Engineering, Faculty of Engineering, Prince of Songkla University, Hat Yai, Songkhla, 90110 Thailand.Department of Chemical Engineering, Faculty of Engineering, Prince of Songkla University, Hat Yai, Songkhla, 90110 Thailand.Plasma and Energy Technology Research Laboratory, Department of Physics, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla, 90110 Thailand.Temperature and relative humidity (RH) dependence of moisture sorption phenomena for agricultural products provide valuable information related to the thermodynamics of the system. So the equilibrium moisture contents (EMC), effective moisture diffusivity (Deff) and thermo-physical properties in terms of void fraction, specific heat capacity, and the apparent density of germinated non-waxy Suphanburi 1 paddy were evaluated. Five commonly cited EMC equations were fitted to the experimental data among temperatures of 40-60°C correlating with RH of 0-90%. The results showed that the modified GAB equation was the best function for describing experimental results while those evaluated thermo-physical properties depended on moisture content. To determine drying kinetics model, the simulated values using Midilli et al. (2002) model and Page’s model was the best fitting to exact drying kinetics values for infrared (IR) and hot air (HA) drying, respectively. Finally, the Deff value of paddy dried with IR and HA sources were also evaluated and the calculated Deff value of both HA and IR drying was in order of 10-9 m2/s.http://rdo.psu.ac.th/sjstweb/journal/36-1/36-1-15.pdfGABA ricedrying modelingeffective diffusivitylong-grain ricethermo-physical properties |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Supawan Tirawanichakul Supanee Wanthong Yutthana Tirawanichakul |
spellingShingle |
Supawan Tirawanichakul Supanee Wanthong Yutthana Tirawanichakul Effective moisture diffusivity, moisture sorption, thermo-physical properties and infrared drying kinetics of germinated paddy Songklanakarin Journal of Science and Technology (SJST) GABA rice drying modeling effective diffusivity long-grain rice thermo-physical properties |
author_facet |
Supawan Tirawanichakul Supanee Wanthong Yutthana Tirawanichakul |
author_sort |
Supawan Tirawanichakul |
title |
Effective moisture diffusivity, moisture sorption, thermo-physical properties and infrared drying kinetics of germinated paddy |
title_short |
Effective moisture diffusivity, moisture sorption, thermo-physical properties and infrared drying kinetics of germinated paddy |
title_full |
Effective moisture diffusivity, moisture sorption, thermo-physical properties and infrared drying kinetics of germinated paddy |
title_fullStr |
Effective moisture diffusivity, moisture sorption, thermo-physical properties and infrared drying kinetics of germinated paddy |
title_full_unstemmed |
Effective moisture diffusivity, moisture sorption, thermo-physical properties and infrared drying kinetics of germinated paddy |
title_sort |
effective moisture diffusivity, moisture sorption, thermo-physical properties and infrared drying kinetics of germinated paddy |
publisher |
Prince of Songkla University |
series |
Songklanakarin Journal of Science and Technology (SJST) |
issn |
0125-3395 |
publishDate |
2014-02-01 |
description |
Temperature and relative humidity (RH) dependence of moisture sorption phenomena for agricultural products
provide valuable information related to the thermodynamics of the system. So the equilibrium moisture contents (EMC),
effective moisture diffusivity (Deff) and thermo-physical properties in terms of void fraction, specific heat capacity, and the
apparent density of germinated non-waxy Suphanburi 1 paddy were evaluated. Five commonly cited EMC equations were
fitted to the experimental data among temperatures of 40-60°C correlating with RH of 0-90%. The results showed that the
modified GAB equation was the best function for describing experimental results while those evaluated thermo-physical
properties depended on moisture content. To determine drying kinetics model, the simulated values using Midilli et al. (2002)
model and Page’s model was the best fitting to exact drying kinetics values for infrared (IR) and hot air (HA) drying, respectively.
Finally, the Deff value of paddy dried with IR and HA sources were also evaluated and the calculated Deff value of both
HA and IR drying was in order of 10-9 m2/s. |
topic |
GABA rice drying modeling effective diffusivity long-grain rice thermo-physical properties |
url |
http://rdo.psu.ac.th/sjstweb/journal/36-1/36-1-15.pdf |
work_keys_str_mv |
AT supawantirawanichakul effectivemoisturediffusivitymoisturesorptionthermophysicalpropertiesandinfrareddryingkineticsofgerminatedpaddy AT supaneewanthong effectivemoisturediffusivitymoisturesorptionthermophysicalpropertiesandinfrareddryingkineticsofgerminatedpaddy AT yutthanatirawanichakul effectivemoisturediffusivitymoisturesorptionthermophysicalpropertiesandinfrareddryingkineticsofgerminatedpaddy |
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