Date
2022-02-15Subject
600 Technology 630 Agriculture Erneuerbare EnergienKonzentrator <Solartechnik>Reflektor <Lichttechnik>KaffeeverarbeitungMetadata
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Aufsatz
Development and Experiments on a Batch-Type Solar Roaster—An Innovative Decentralized System for Coffee Roasting
Abstract
About 70% of the harvested coffee is exported to the industrialized nations for value addition due to lack of processing and logistic facilities in developing coffee producer countries, thus leaving behind a marginal economic return for the growers. This research was conducted to investigate the roasting capacity of an innovatively developed batch-type directly solar radiated roasting system for the decentralized processing of coffee using solar energy. Central composite rotatable design (CCRD) was employed to design the experiments to optimize the coffee roasting process. Experimental results revealed that with an average solar direct normal irradiance (DNI) of 800 W/m2, the roaster was capable of roasting a batch of 2 kg coffee beans in 20, 23, and 25 min subjected to light roasts, medium roasts, and dark roasts, respectively at a drum speed of two revolutions per minute (rpm). The batch-type solar roaster has the capacity to roast 28.8–36 kg of coffee beans depending on dark to light roasting conditions on a clear sunny day with DNI ranging from 650 to 850 W/m2. The system thermal efficiency during coffee roasting was determined to be 62.2%, whereas the roasting efficiency at a corresponding light roast, medium roast, and dark roast was found to be 97.5%, 95.2%, and 91.3%, respectively. The payback period of the solar roaster unit was estimated to be 1038 working sunshine hours, making it viable for commercialization.
Citation
In: Sustainability Volume 14 / Issue 4 (2022-02-15) eissn:2071-1050Sponsorship
Gefördert durch den Publikationsfonds der Universität KasselCitation
@article{doi:10.17170/kobra-202204216066,
author={Majeed, Faizan and Raza, Ali and Munir, Anjum and Hensel, Oliver},
title={Development and Experiments on a Batch-Type Solar Roaster—An Innovative Decentralized System for Coffee Roasting},
journal={Sustainability},
year={2022}
}
0500 Oax 0501 Text $btxt$2rdacontent 0502 Computermedien $bc$2rdacarrier 1100 2022$n2022 1500 1/eng 2050 ##0##http://hdl.handle.net/123456789/13791 3000 Majeed, Faizan 3010 Raza, Ali 3010 Munir, Anjum 3010 Hensel, Oliver 4000 Development and Experiments on a Batch-Type Solar Roaster—An Innovative Decentralized System for Coffee Roasting / Majeed, Faizan 4030 4060 Online-Ressource 4085 ##0##=u http://nbn-resolving.de/http://hdl.handle.net/123456789/13791=x R 4204 \$dAufsatz 4170 5550 {{Erneuerbare Energien}} 5550 {{Konzentrator <Solartechnik>}} 5550 {{Reflektor <Lichttechnik>}} 5550 {{Kaffeeverarbeitung}} 7136 ##0##http://hdl.handle.net/123456789/13791
2022-04-26T14:32:30Z 2022-04-26T14:32:30Z 2022-02-15 doi:10.17170/kobra-202204216066 http://hdl.handle.net/123456789/13791 Gefördert durch den Publikationsfonds der Universität Kassel eng Namensnennung 4.0 International http://creativecommons.org/licenses/by/4.0/ renewable energy Scheffler concentrator reflector batch-type solar roaster response surface methodology coffee roasting 600 630 Development and Experiments on a Batch-Type Solar Roaster—An Innovative Decentralized System for Coffee Roasting Aufsatz About 70% of the harvested coffee is exported to the industrialized nations for value addition due to lack of processing and logistic facilities in developing coffee producer countries, thus leaving behind a marginal economic return for the growers. This research was conducted to investigate the roasting capacity of an innovatively developed batch-type directly solar radiated roasting system for the decentralized processing of coffee using solar energy. Central composite rotatable design (CCRD) was employed to design the experiments to optimize the coffee roasting process. Experimental results revealed that with an average solar direct normal irradiance (DNI) of 800 W/m2, the roaster was capable of roasting a batch of 2 kg coffee beans in 20, 23, and 25 min subjected to light roasts, medium roasts, and dark roasts, respectively at a drum speed of two revolutions per minute (rpm). The batch-type solar roaster has the capacity to roast 28.8–36 kg of coffee beans depending on dark to light roasting conditions on a clear sunny day with DNI ranging from 650 to 850 W/m2. The system thermal efficiency during coffee roasting was determined to be 62.2%, whereas the roasting efficiency at a corresponding light roast, medium roast, and dark roast was found to be 97.5%, 95.2%, and 91.3%, respectively. The payback period of the solar roaster unit was estimated to be 1038 working sunshine hours, making it viable for commercialization. open access Majeed, Faizan Raza, Ali Munir, Anjum Hensel, Oliver doi:10.3390/su14042217 Erneuerbare Energien Konzentrator <Solartechnik> Reflektor <Lichttechnik> Kaffeeverarbeitung publishedVersion eissn:2071-1050 Issue 4 Sustainability Volume 14 false 2217
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