Drying rates of some fruits and vegetables with passive solar dryers

作     者：A.F.Alonge O.A.Adeboye 

作者机构：Department of Agricultural and Food EngineeringUniversity of UyoUyoNigeria Department of Agricultural and Biosystems EngineeringUniversity of IlorinIlorinNigeria 

出 版 物：《International Journal of Agricultural and Biological Engineering》 (国际农业与生物工程学报（英文）)

年 卷 期：2012年第5卷第4期

页      面：83-90页

核心收录：

学科分类：0202[经济学-应用经济学] 02[经济学] 020205[经济学-产业经济学] 

主　　题：drying rate passive solar dryer moisture content design 

摘      要：Two passive solar dryers were designed and constructed with available local *** passive solar dryers which were direct and indirect types were tested with pepper(Capsicum annum L.),okro(Abelmoschus esculentus L.)and vegetables(Amaranthus hybridus L.)in order to evaluate the drying rate of these *** moisture content of 78.9%(w.b.)for 180 g freshly harvested peppers was reduced to 24.0%(w.b.).The drying rate in the direct passive solar dryer was found to be higher than the indirect passive solar *** initial moisture content of 92%(w.b.)for 1000 g okro was reduced to 20%(w.b.).The drying rate in the direct passive solar dryer was also found to be higher than in the indirect passive solar *** initial moisture content of 90%(w.b.)for 400 g vegetable was reduced to 20%(w.b.).The drying rate with the direct passive solar dryer was found to be higher than that with indirect passive solar *** the course of drying,after each crop was kept inside the drying system,the temperature of the drying was monitored at an-hour interval;the moisture content was also monitored at a three-hour interval until there was no more change in the weight of the *** crops dried faster with the direct passive solar dryer than with the indirect passive solar *** a result of the highest temperature attained in the direct passive solar dryer,the rate of moisture removal was the highest in this dryer.