Open AccessOptimum Process Parameters and Thermal Properties of Moisture Content Reduction in Water Yam Drying
Author(s) -
Christian Henry,
T. Nwabanne Jospeh,
E. Onu Chijioke,
O. Nwajinka Charles
Publication year - 2021
Publication title -
asian journal of chemical sciences
Language(s) - English
Resource type - Journals
ISSN - 2456-7795
DOI - 10.9734/ajocs/2021/v9i419080
Subject(s) - water content , thermal diffusivity , moisture , gravimetric analysis , airspeed , materials science , pulp and paper industry , environmental science , composite material , chemistry , thermodynamics , physics , geotechnical engineering , organic chemistry , engineering
The determination of optimum process parameters for moisture content reduction in water yam drying using a hot air dryer was the aim of this work. Gravimetric method was used to determine the moisture content. Design of experiment was used with slice thickness, airspeed and temperature as the independent factors. Thermal properties such as effective moisture diffusivity and activation energy were determined. The result showed that slice thickness, airspeed and temperature have significant influence on the moisture content reduction. The effective moisture diffusivity ranged from 2.84 x 10-5 m2/s to 8.10 x 10-5 m2/s. The activation energy was 30.592kJ/mol. Minimum moisture content value of 11.98% was obtained at slice thickness of 2mm, airspeed of 2 m/s and temperature of 70oC. The quadratic model best described the drying process. The hot air dryer can conveniently be used for moisture content reduction in water yam slices which will increase its shelf life.