An Effective Moisture Diffusivity of a Hybrid Double Pass Collector-Solar Dryer for Tomato Slices Drying

IF 1.204 Q3 Energy
A. N. Korti, H. Guellil
{"title":"An Effective Moisture Diffusivity of a Hybrid Double Pass Collector-Solar Dryer for Tomato Slices Drying","authors":"A. N. Korti,&nbsp;H. Guellil","doi":"10.3103/S0003701X24602229","DOIUrl":null,"url":null,"abstract":"<p>This study tries to analysis the thermal performance of the newly fabricated compact hybrid double pass collector-solar dryer using a wavy absorber. Energy and exergy efficiencies of the solar collector, drying chamber and drying process were performed during drying of tomato slices and compared with the open sun drying in the same conditions. The experiments were performed during spring seasons with the least available amount of solar energy. Mathematical modelling of drying kinetics was tested and used to evaluate the effective moisture diffusivity. The results show that a tomato slice reaches the equilibrium moisture content of 8.9% (wet basis) after just 7–8 h of operating time, depending to the trays positions. The average effective diffusivity of tomato reaches 1.657 × 10<sup>–10</sup> and 1.518 × 10<sup>–10</sup> m<sup>2</sup>/s for open sun and hybrid solar dryer, respectively. The average exergy efficiencies reach 2.32, 49 and 27% for solar collector, drying chamber and drying process, respectively. Low exergy efficiency is therefore observed in the solar collector which requires more efficient insulation. Exergy efficiencies of drying chamber and drying process decreases significantly during the operating periods of auxiliary system. The thermal energy input becomes important and thermal losses increase.</p>","PeriodicalId":475,"journal":{"name":"Applied Solar Energy","volume":"60 4","pages":"546 - 558"},"PeriodicalIF":1.2040,"publicationDate":"2024-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Applied Solar Energy","FirstCategoryId":"1","ListUrlMain":"https://link.springer.com/article/10.3103/S0003701X24602229","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"Energy","Score":null,"Total":0}
引用次数: 0

Abstract

This study tries to analysis the thermal performance of the newly fabricated compact hybrid double pass collector-solar dryer using a wavy absorber. Energy and exergy efficiencies of the solar collector, drying chamber and drying process were performed during drying of tomato slices and compared with the open sun drying in the same conditions. The experiments were performed during spring seasons with the least available amount of solar energy. Mathematical modelling of drying kinetics was tested and used to evaluate the effective moisture diffusivity. The results show that a tomato slice reaches the equilibrium moisture content of 8.9% (wet basis) after just 7–8 h of operating time, depending to the trays positions. The average effective diffusivity of tomato reaches 1.657 × 10–10 and 1.518 × 10–10 m2/s for open sun and hybrid solar dryer, respectively. The average exergy efficiencies reach 2.32, 49 and 27% for solar collector, drying chamber and drying process, respectively. Low exergy efficiency is therefore observed in the solar collector which requires more efficient insulation. Exergy efficiencies of drying chamber and drying process decreases significantly during the operating periods of auxiliary system. The thermal energy input becomes important and thermal losses increase.

Abstract Image

双通道集热器-太阳能干燥机干燥番茄片的有效水分扩散系数
本研究尝试分析新制造的采用波浪吸收器的紧凑混合式双通道集热器-太阳能干燥器的热性能。对太阳能集热器、干燥室和干燥过程在番茄片干燥过程中的能量和火用效率进行了比较,并与相同条件下的露天日光干燥进行了比较。实验在可利用太阳能最少的春季进行。测试了干燥动力学的数学模型,并用于评估有效水分扩散率。结果表明,根据托盘位置的不同,仅需7-8小时的操作时间,番茄片的平衡含水率即可达到8.9%(湿基)。敞开式和混合式太阳能干燥器对番茄的平均有效扩散系数分别达到1.657 × 10-10和1.518 × 10-10 m2/s。太阳能集热器、干燥室和干燥过程的平均火用效率分别达到2.32%、49%和27%。因此,在需要更有效的绝缘的太阳能集热器中观察到低的能源效率。在辅助系统运行期间,干燥室和干燥过程的火用效率显著降低。热能输入变得重要,热损失增加。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
求助全文
约1分钟内获得全文 求助全文
来源期刊
Applied Solar Energy
Applied Solar Energy Energy-Renewable Energy, Sustainability and the Environment
CiteScore
2.50
自引率
0.00%
发文量
0
期刊介绍: Applied Solar Energy  is an international peer reviewed journal covers various topics of research and development studies on solar energy conversion and use: photovoltaics, thermophotovoltaics, water heaters, passive solar heating systems, drying of agricultural production, water desalination, solar radiation condensers, operation of Big Solar Oven, combined use of solar energy and traditional energy sources, new semiconductors for solar cells and thermophotovoltaic system photocells, engines for autonomous solar stations.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信