Performance evaluation of diminutive solar dryer for drying of green coffee beans: In Ethiopian highlands
This Research presents the design and Performance evaluation of a small-scale solar dryer for drying coffee beans in Ethiopia. The unique feature of this dryer is the incorporation of a reflector which significantly enhances solar energy absorption. Unlike conventional solar dryers, this indirect so...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-01-01
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| Series: | Case Studies in Thermal Engineering |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214157X24016848 |
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| author | Addisu Yenesew Kebede Muluken Temesgen Tigabu Asmare Tezera Admase Atrsaw Jejaw Bezie |
| author_facet | Addisu Yenesew Kebede Muluken Temesgen Tigabu Asmare Tezera Admase Atrsaw Jejaw Bezie |
| author_sort | Addisu Yenesew Kebede |
| collection | DOAJ |
| description | This Research presents the design and Performance evaluation of a small-scale solar dryer for drying coffee beans in Ethiopia. The unique feature of this dryer is the incorporation of a reflector which significantly enhances solar energy absorption. Unlike conventional solar dryers, this indirect solar dryer employs the solar powered blower to expedite the drying process while preserving the delicate flavor of roasted coffee beans. The experimental result shows that the temperature within the chamber is rising to a maximum of 70 °C. Using natural drying system, for specific sample coffee beans, 5–7 days are needed. Nevertheless, the new dryer could reduce the moisture content of coffee beans from 60 % to 10 % on a wet basis (W.B.) within a couple of days. This is mainly reducing the energy and time wasted by natural drying system to dry coffee beans. Using the analytical approach, the thermal efficiency of this diminutive solar dryer reaches 35.2 %. The finding of this paper is also important to small-scale coffee growers looking for an affordable and environmentally friendly method of drying coffee beans. Future research should explore further optimizations for drying various agricultural products, expanding the dryer's applicability beyond coffee beans. |
| format | Article |
| id | doaj-art-e6d0680db1b74b8a949f6b3ae6183f55 |
| institution | Kabale University |
| issn | 2214-157X |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Thermal Engineering |
| spelling | doaj-art-e6d0680db1b74b8a949f6b3ae6183f552025-01-08T04:52:47ZengElsevierCase Studies in Thermal Engineering2214-157X2025-01-0165105653Performance evaluation of diminutive solar dryer for drying of green coffee beans: In Ethiopian highlandsAddisu Yenesew Kebede0Muluken Temesgen Tigabu1Asmare Tezera Admase2Atrsaw Jejaw Bezie3Faculty of Mechanical and Industrial Engineering, Bahir Dar Institute of Technology, P.O.BOX 26, Bahir Dar University, Bahir Dar, Ethiopia; Corresponding author.Faculty of Mechanical and Industrial Engineering, Bahir Dar Institute of Technology, P.O.BOX 26, Bahir Dar University, Bahir Dar, Ethiopia; Bahir Dar Energy Center, Bahir Dar Institute of Technology, P.O.BOX 26, Bahir Dar University, Bahir Dar, EthiopiaFaculty of Chemical and Food Engineering, Bahir Dar Institute of Technology, P.O.BOX 26, Bahir Dar University, Bahir Dar, EthiopiaFaculty of Mechanical and Industrial Engineering, Bahir Dar Institute of Technology, P.O.BOX 26, Bahir Dar University, Bahir Dar, EthiopiaThis Research presents the design and Performance evaluation of a small-scale solar dryer for drying coffee beans in Ethiopia. The unique feature of this dryer is the incorporation of a reflector which significantly enhances solar energy absorption. Unlike conventional solar dryers, this indirect solar dryer employs the solar powered blower to expedite the drying process while preserving the delicate flavor of roasted coffee beans. The experimental result shows that the temperature within the chamber is rising to a maximum of 70 °C. Using natural drying system, for specific sample coffee beans, 5–7 days are needed. Nevertheless, the new dryer could reduce the moisture content of coffee beans from 60 % to 10 % on a wet basis (W.B.) within a couple of days. This is mainly reducing the energy and time wasted by natural drying system to dry coffee beans. Using the analytical approach, the thermal efficiency of this diminutive solar dryer reaches 35.2 %. The finding of this paper is also important to small-scale coffee growers looking for an affordable and environmentally friendly method of drying coffee beans. Future research should explore further optimizations for drying various agricultural products, expanding the dryer's applicability beyond coffee beans.http://www.sciencedirect.com/science/article/pii/S2214157X24016848Solar dryerTilt angleWet basisMoisture contentCoffee beansThermal efficiency |
| spellingShingle | Addisu Yenesew Kebede Muluken Temesgen Tigabu Asmare Tezera Admase Atrsaw Jejaw Bezie Performance evaluation of diminutive solar dryer for drying of green coffee beans: In Ethiopian highlands Case Studies in Thermal Engineering Solar dryer Tilt angle Wet basis Moisture content Coffee beans Thermal efficiency |
| title | Performance evaluation of diminutive solar dryer for drying of green coffee beans: In Ethiopian highlands |
| title_full | Performance evaluation of diminutive solar dryer for drying of green coffee beans: In Ethiopian highlands |
| title_fullStr | Performance evaluation of diminutive solar dryer for drying of green coffee beans: In Ethiopian highlands |
| title_full_unstemmed | Performance evaluation of diminutive solar dryer for drying of green coffee beans: In Ethiopian highlands |
| title_short | Performance evaluation of diminutive solar dryer for drying of green coffee beans: In Ethiopian highlands |
| title_sort | performance evaluation of diminutive solar dryer for drying of green coffee beans in ethiopian highlands |
| topic | Solar dryer Tilt angle Wet basis Moisture content Coffee beans Thermal efficiency |
| url | http://www.sciencedirect.com/science/article/pii/S2214157X24016848 |
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