Thin-Layer Moisture Adsorption Studies of Barley
2003
Basunia, M. A. | Abe, T.
Thin-layer moisture adsorption data were measured for barley at temperature ranging from 5.7°C to 46.3°C and for relative humidities ranging from 48.2% to 88.6%. Thirty-three tests were conducted, and each test lasted for about a week. The re-wetting data were fitted to the Page model, based on the ratios of the differences between the initial and final moisture contents and the equilibrium moisture content. The Page model was chosen because it is both effective and relatively simple, and when incorporated into a deep-bed simulation model requires less computing time than the theoretical diffusion moisture transfer model. The model gave a very good fit for the moisture content with an average standard error of 0.176% dry-basis. The model parameter K is a function of re-wetting air temperature, relative humidity, and re-wetting time. The parameter N can be simply represented as a product-dependent constant without any considerable error in simulating the re-wetting rate of barely. It is not necessary to relate the re-wetting parameters with the initial moisture content of the sample. The results presented here are useful in calculating the moisture transfer process occurring during low-temperature drying and ventilated storage.
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