보리의 평형함수율/평형상대습도에 관한 연구
Equilibrium moisture content/equilibrium relative humidity of barley
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초록
Desorption equilibrium moisture content (EMC)/equilibrium relative humidity (ERH) experiments were performed on two cultivars (Sae naked and Hin-chal naked) of barley (Hordeum vulgare L.) at 5, 15, 25, 35, and 45℃ for moisture contents between 9.51 and 29.13%,db. The method employed involved measuring the ERH of air in contact with the grain under static conditions, using an electronic hygrometer. The effects of temperature and moisture contents were investigated, and the measured values were fitted to the modified Henderson model, the modified Chung-Pfost model, the modified Halsey model, the modified Oswin model, and the modified GAB model. The ERHs of barleys decreased with decreasing moisture content and temperature, and the EMCs increased with decreasing temperature and increasing relative humidity. The increase in moisture content with increasing relative humidity at a given temperature is not linear: the moisture content increased rapidly at high relative humidities, and the differences between ERH values at different temperature (5-45℃) were insignificant at high relative humidity (>80%). The effect of the cultivars on EMC/ERH was insignificant at the same temperature. The modified Halsey model was found to be the best in describing the EMC/ERH of barleys.
Abstract
Desorption equilibrium moisture content (EMC)/equilibrium relative humidity (ERH) experiments were performed on two cultivars (Sae naked and Hin-chal naked) of barley (Hordeum vulgare L.) at 5, 15, 25, 35, and 45℃ for moisture contents between 9.51 and 29.13%,db. The method employed involved measuring the ERH of air in contact with the grain under static conditions, using an electronic hygrometer. The effects of temperature and moisture contents were investigated, and the measured values were fitted to the modified Henderson model, the modified Chung-Pfost model, the modified Halsey model, the modified Oswin model, and the modified GAB model. The ERHs of barleys decreased with decreasing moisture content and temperature, and the EMCs increased with decreasing temperature and increasing relative humidity. The increase in moisture content with increasing relative humidity at a given temperature is not linear: the moisture content increased rapidly at high relative humidities, and the differences between ERH values at different temperature (5-45℃) were insignificant at high relative humidity (>80%). The effect of the cultivars on EMC/ERH was insignificant at the same temperature. The modified Halsey model was found to be the best in describing the EMC/ERH of barleys.
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