Energy and Exergy Analyses of Rice Drying in a Novel Electric Stationary Bed Grain-Drying System with Internal Circulation of the Drying Medium
In our study, we developed a system to reduce both energy consumption and pollutant discharge during the drying process. We present a new technology, a stationary bed grain-drying test device based on the internal circulation of the drying medium (ICODM). A rice-drying experiment was carried out ins...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-12-01
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| Series: | Foods |
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| Online Access: | https://www.mdpi.com/2304-8158/11/1/101 |
| _version_ | 1827668522162978816 |
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| author | Guiying Wang Wenfu Wu Daping Fu Wen Xu Yan Xu Yaqiu Zhang |
| author_facet | Guiying Wang Wenfu Wu Daping Fu Wen Xu Yan Xu Yaqiu Zhang |
| author_sort | Guiying Wang |
| collection | DOAJ |
| description | In our study, we developed a system to reduce both energy consumption and pollutant discharge during the drying process. We present a new technology, a stationary bed grain-drying test device based on the internal circulation of the drying medium (ICODM). A rice-drying experiment was carried out inside of it, and the influences of air temperature (AT) and air velocity (AV) on the energy and exergy efficiencies (EEE) as well as the improvement potential rate (IPR) and the sustainability index (SI) of the rice-drying process were studied. The following conclusions were obtained: when the rice was dried at a temperature of below 55 °C and an AV across the grain layer of 0.5 m/s, the average EEE during the drying process was 48.27–72.17% and 40.27–71.07%, respectively, demonstrating an increasing trend as the drying medium temperature increased. When the rice was dried using an AV across the grain layer in the range of 0.33–0.5 m/s and a temperature of 40 °C, the two values were 39.79–73.9% and 49.66–71.04%, respectively, demonstrating a decreasing trend as the drying medium flow velocity increased. IPR and SI were 4.1–8.5 J/s and 1.9–2.7, respectively, at a drying temperature of 30–55 °C and an AV of 0.33–0.5 m/s. These conclusions can provide helpful guidance for the optimization and control of the rice-drying process in terms of saving energy. |
| first_indexed | 2024-03-10T03:41:59Z |
| format | Article |
| id | doaj.art-e4b5eba898124031b008508e16405f94 |
| institution | Directory Open Access Journal |
| issn | 2304-8158 |
| language | English |
| last_indexed | 2024-03-10T03:41:59Z |
| publishDate | 2021-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Foods |
| spelling | doaj.art-e4b5eba898124031b008508e16405f942023-11-23T11:31:29ZengMDPI AGFoods2304-81582021-12-0111110110.3390/foods11010101Energy and Exergy Analyses of Rice Drying in a Novel Electric Stationary Bed Grain-Drying System with Internal Circulation of the Drying MediumGuiying Wang0Wenfu Wu1Daping Fu2Wen Xu3Yan Xu4Yaqiu Zhang5College of Biological and Agricultural Engineering, Jilin University, 5988 Renmin Road, Changchun 130025, ChinaCollege of Biological and Agricultural Engineering, Jilin University, 5988 Renmin Road, Changchun 130025, ChinaCollege of Biological and Agricultural Engineering, Jilin University, 5988 Renmin Road, Changchun 130025, ChinaJilin Business and Technology College, 1666 Cullen Lake Road, Changchun 130507, ChinaCollege of Biological and Agricultural Engineering, Jilin University, 5988 Renmin Road, Changchun 130025, ChinaCollege of Biological and Agricultural Engineering, Jilin University, 5988 Renmin Road, Changchun 130025, ChinaIn our study, we developed a system to reduce both energy consumption and pollutant discharge during the drying process. We present a new technology, a stationary bed grain-drying test device based on the internal circulation of the drying medium (ICODM). A rice-drying experiment was carried out inside of it, and the influences of air temperature (AT) and air velocity (AV) on the energy and exergy efficiencies (EEE) as well as the improvement potential rate (IPR) and the sustainability index (SI) of the rice-drying process were studied. The following conclusions were obtained: when the rice was dried at a temperature of below 55 °C and an AV across the grain layer of 0.5 m/s, the average EEE during the drying process was 48.27–72.17% and 40.27–71.07%, respectively, demonstrating an increasing trend as the drying medium temperature increased. When the rice was dried using an AV across the grain layer in the range of 0.33–0.5 m/s and a temperature of 40 °C, the two values were 39.79–73.9% and 49.66–71.04%, respectively, demonstrating a decreasing trend as the drying medium flow velocity increased. IPR and SI were 4.1–8.5 J/s and 1.9–2.7, respectively, at a drying temperature of 30–55 °C and an AV of 0.33–0.5 m/s. These conclusions can provide helpful guidance for the optimization and control of the rice-drying process in terms of saving energy.https://www.mdpi.com/2304-8158/11/1/101internal circulation of the drying mediumelectric powerrice dryingenergy and exergy analyses |
| spellingShingle | Guiying Wang Wenfu Wu Daping Fu Wen Xu Yan Xu Yaqiu Zhang Energy and Exergy Analyses of Rice Drying in a Novel Electric Stationary Bed Grain-Drying System with Internal Circulation of the Drying Medium Foods internal circulation of the drying medium electric power rice drying energy and exergy analyses |
| title | Energy and Exergy Analyses of Rice Drying in a Novel Electric Stationary Bed Grain-Drying System with Internal Circulation of the Drying Medium |
| title_full | Energy and Exergy Analyses of Rice Drying in a Novel Electric Stationary Bed Grain-Drying System with Internal Circulation of the Drying Medium |
| title_fullStr | Energy and Exergy Analyses of Rice Drying in a Novel Electric Stationary Bed Grain-Drying System with Internal Circulation of the Drying Medium |
| title_full_unstemmed | Energy and Exergy Analyses of Rice Drying in a Novel Electric Stationary Bed Grain-Drying System with Internal Circulation of the Drying Medium |
| title_short | Energy and Exergy Analyses of Rice Drying in a Novel Electric Stationary Bed Grain-Drying System with Internal Circulation of the Drying Medium |
| title_sort | energy and exergy analyses of rice drying in a novel electric stationary bed grain drying system with internal circulation of the drying medium |
| topic | internal circulation of the drying medium electric power rice drying energy and exergy analyses |
| url | https://www.mdpi.com/2304-8158/11/1/101 |
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