Mathematical modeling and performance investigation of mixed-mode and indirect solar dryers for natural rubber sheet drying

被引：65
作者：
Dejchanchaiwong, Racha [1 ,2 ]
Arkasuwan, Auk [1 ,3 ]
Kumar, Anil [1 ,3 ]
Tekasakul, Perapong [1 ,3 ]
机构：
[1] Prince Songkla Univ, Energy Technol Res Ctr, Fac Engn, Hat Yai 90112, Songkhla, Thailand
[2] Prince Songkla Univ, Dept Chem Engn, Fac Engn, Hat Yai 90112, Songkhla, Thailand
[3] Prince Songkla Univ, Dept Mech Engn, Fac Engn, Hat Yai 90112, Songkhla, Thailand
来源：
ENERGY FOR SUSTAINABLE DEVELOPMENT | 2016年 / 34卷
关键词：
Rubber drying; Solar dryer; Mixed-mode dryer; Air-dried sheet; Mathematical model; OPTIMIZATION; KINETICS; AIR;
D O I：
10.1016/j.esd.2016.07.003
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Smallholder rubber producers typically dry rubber in the open air, a process that takes about seven days, allowing the rubber to deteriorate and thus decreasing the price obtained by the producers. Solar dryers decrease the drying time by 2-3 days, thereby yielding a higher quality product. In this study, performances of mixed-mode and indirect solar drying systems have been investigated for 30 natural rubber sheets. Drying efficiency of the mixed mode dyer is 15.4% which is higher than the indirect solar dryer (13.3%). The moisture contents of rubber sheets are reduced from 32.3 to 2.0% and 29.4 to 8.0% on a wet basis for mixed-mode and indirect solar drying, respectively, in 4 days. Hii et al. model is the combination of the Page and Two-term drying model. This model is found to best describe the natural rubber sheet drying behavior in both mixed-mode and indirect solar dryers. Coefficient of determination and root mean square error for mixed-mode and indirect solar drying of natural rubber are 0.998 & 0.0096 and 0.996 & 0.0109, respectively. Performance of the mixed-mode dryer is superior to the indirect solar dryer. Therefore, mixed-mode solar dryers are recommended for natural rubber sheet drying to smallholders. (C) 2016 International Energy Initiative. Published by Elsevier Inc. All rights reserved.
引用
收藏
页码：44 / 53
页数：10
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