Study of Equilibrium Relative Humidity Properties and Hysteresis for Longan

• Main Authors: Hurng, Huaang-Youh, 洪滉祐
• Other Authors: Chen Jiunn-Ming
• Format: Others
• Language: zh-TW
• Published: 1996
• Online Access: http://ndltd.ncl.edu.tw/handle/58415841039802212857

碩士 === 國立中興大學 === 農業機械工程學系 === 84 === This research measured the ERH/EMC of Longan during desorption and adsorption processing under the 11 different temperatures among 5C and 90C. The experimental result was analyzed through the non-linear regression analysis of SAS software.The modified Halsey model was suitable on the two parameters model of ERH/EMC of Longan during desorption and adsorption processing. The modified Oswin model was suitable on the three parameters model of ERH/EMC of Longan during desorption and adsorption processing.The mathematics equations of those two modified models were established on this research.The Hystersis phenomenon of Longan was happened between 5c and 90C during storage.The lowest limit for hysteresis appearance occurred at 0.1 moisture(dry base) and 0.2 RH.The relative humidity range of converging beginning of hystersis loop increase as higher temperature and its moiisture range was between 0.18 and 0.22(dry base)