Multiple Phase Change Materials for Performance Enhancement of a Solar Dryer with Double Pass Collector

作     者：Ahmed J.Hamad Fawziea M.Hussien Johain J.Faraj 

作者机构：Engineering Technical CollegeMiddle Technical UniversityBaghdadIraq 

出 版 物：《Energy Engineering》 (能源工程（英文）)

年 卷 期：2021年第118卷第5期

页      面：1483-1497页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

主　　题：Solar dryer double pass indirect dryer multiple PCM drying rate 

摘      要：The fluctuation in drying temperature influences the food products’quality and drying time significantly during the drying process using an indirect solar *** of the effective methods to reduce these variations in the temperature is based on thermal storage materials to control the drying *** experimental investigation is presented in this study to evaluate the performance of an indirect solar dryer with air double pass using multiple phase change materials(PCM)as thermal storage *** PCMs with different melting points are used to store the available heat energy during peak sunshine periods and reduce the drying temperature *** tests on a food product sample are conducted in three cases,the first was without PCMs using natural *** second and third cases are based on forced convection with and without using multiple PCMs under Baghdad city *** results showed that;approximately a steady temperature of hot drying air was obtained during relatively low ambient temperatures when the dryer was incorporated with multiple *** drying time of the product sample for the natural,forced convection without PCMs and forced with PCMs was 87,72 and 47 h,*** higher performance of the dryer was for the forced convection with *** reduction percentage in drying time was about 17.2%and 46%for the forced convection without and with PCMs respectively compared with natural *** average drying rate for the natural,forced without PCMs and forced convection with PCMs was 0.0093,0.0135 and 0.0172 kg/h,*** enhancement in thermal efficiency of the solar collector and drying chamber with multiple PCMs was 43%and 25.5%,respectively,compared with a typical solar dryer.