Numerical Analysis of Ventilation Efficiency of a Korean Venlo-Type Greenhouse with Continuous Roof Vents
A Venlo-type greenhouse with a continuous roof vent (CR-Venlo greenhouse) was proposed by the Ministry of Agriculture, Food and Rural Affairs, South Korea (2019) for natural ventilation even during summers. It is ventilated through the buoyancy effect of the heated air using the high eave elevation....
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| Format: | Article |
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MDPI AG
2022-08-01
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| Series: | Agriculture |
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| Online Access: | https://www.mdpi.com/2077-0472/12/9/1349 |
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| author | Se-Jun Park In-Bok Lee Sang-Yeon Lee Jun-Gyu Kim Young-Bae Choi Cristina Decano-Valentin Jeong-Hwa Cho Hyo-Hyeog Jeong Uk-Hyeon Yeo |
| author_facet | Se-Jun Park In-Bok Lee Sang-Yeon Lee Jun-Gyu Kim Young-Bae Choi Cristina Decano-Valentin Jeong-Hwa Cho Hyo-Hyeog Jeong Uk-Hyeon Yeo |
| author_sort | Se-Jun Park |
| collection | DOAJ |
| description | A Venlo-type greenhouse with a continuous roof vent (CR-Venlo greenhouse) was proposed by the Ministry of Agriculture, Food and Rural Affairs, South Korea (2019) for natural ventilation even during summers. It is ventilated through the buoyancy effect of the heated air using the high eave elevation. However, the CR-Venlo greenhouse was not distributed domestically, and its ventilation efficiency was not quantitatively evaluated. We aimed to analyze the natural ventilation efficiency of the greenhouse according to the eave height, using computational-fluid-dynamics. The simulation model was analyzed for hot summer conditions. The target greenhouse is ventilated only through the roof vent with all roof windows open; therefore, the air introduced through the roof window is easily exhausted. To evaluate the efficiency of ventilation, the external air entering through the roof window was calculated and evaluated. The amount of incoming air varied greatly with the location of the span and average temperature of the greenhouse; The temperature of the crop zone decreased lognormally with increasing height of the eave. Moreover, the ventilation efficiency of CR-Venlo greenhouse could be increased by improving the ventilation structure such as a shape, position or combination of roof window. |
| first_indexed | 2024-03-10T01:02:14Z |
| format | Article |
| id | doaj.art-144b0a55b60b414f9a6a798b59b074e7 |
| institution | Directory Open Access Journal |
| issn | 2077-0472 |
| language | English |
| last_indexed | 2024-03-10T01:02:14Z |
| publishDate | 2022-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Agriculture |
| spelling | doaj.art-144b0a55b60b414f9a6a798b59b074e72023-11-23T14:32:30ZengMDPI AGAgriculture2077-04722022-08-01129134910.3390/agriculture12091349Numerical Analysis of Ventilation Efficiency of a Korean Venlo-Type Greenhouse with Continuous Roof VentsSe-Jun Park0In-Bok Lee1Sang-Yeon Lee2Jun-Gyu Kim3Young-Bae Choi4Cristina Decano-Valentin5Jeong-Hwa Cho6Hyo-Hyeog Jeong7Uk-Hyeon Yeo8Department of Rural Systems Engineering, Research Institute for Agriculture and Life Sciences, College of Agriculture and Life Sciences, Seoul National University, 1, Gwanakno, Gwanak-gu, Seoul 08826, KoreaDepartment of Rural Systems Engineering, Research Institute for Agriculture and Life Sciences, Global Smart Farm Convergence Major, College of Agriculture and Life Sciences, Seoul National University, 1, Gwanakno, Gwanak-gu, Seoul 08826, KoreaDepartment of Rural Systems Engineering, Research Institute for Agriculture and Life Sciences, College of Agriculture and Life Sciences, Seoul National University, 1, Gwanakno, Gwanak-gu, Seoul 08826, KoreaDepartment of Rural Systems Engineering, Research Institute for Agriculture and Life Sciences, College of Agriculture and Life Sciences, Seoul National University, 1, Gwanakno, Gwanak-gu, Seoul 08826, KoreaDepartment of Rural Systems Engineering, Research Institute for Agriculture and Life Sciences, College of Agriculture and Life Sciences, Seoul National University, 1, Gwanakno, Gwanak-gu, Seoul 08826, KoreaDepartment of Rural Systems Engineering, Research Institute for Agriculture and Life Sciences, College of Agriculture and Life Sciences, Seoul National University, 1, Gwanakno, Gwanak-gu, Seoul 08826, KoreaDepartment of Rural Systems Engineering, Research Institute for Agriculture and Life Sciences, College of Agriculture and Life Sciences, Seoul National University, 1, Gwanakno, Gwanak-gu, Seoul 08826, KoreaDepartment of Rural Systems Engineering, Research Institute for Agriculture and Life Sciences, College of Agriculture and Life Sciences, Seoul National University, 1, Gwanakno, Gwanak-gu, Seoul 08826, KoreaAgriculture, Animal & Aquaculture Intelligence Research Center, Electronics and Telecommunications Research Institute, 218 Gajeong-ro, Yuseong-gu, Daejeon 34129, KoreaA Venlo-type greenhouse with a continuous roof vent (CR-Venlo greenhouse) was proposed by the Ministry of Agriculture, Food and Rural Affairs, South Korea (2019) for natural ventilation even during summers. It is ventilated through the buoyancy effect of the heated air using the high eave elevation. However, the CR-Venlo greenhouse was not distributed domestically, and its ventilation efficiency was not quantitatively evaluated. We aimed to analyze the natural ventilation efficiency of the greenhouse according to the eave height, using computational-fluid-dynamics. The simulation model was analyzed for hot summer conditions. The target greenhouse is ventilated only through the roof vent with all roof windows open; therefore, the air introduced through the roof window is easily exhausted. To evaluate the efficiency of ventilation, the external air entering through the roof window was calculated and evaluated. The amount of incoming air varied greatly with the location of the span and average temperature of the greenhouse; The temperature of the crop zone decreased lognormally with increasing height of the eave. Moreover, the ventilation efficiency of CR-Venlo greenhouse could be increased by improving the ventilation structure such as a shape, position or combination of roof window.https://www.mdpi.com/2077-0472/12/9/1349computational fluid dynamics (CFD)eave heightnatural ventilationvenlo greenhouse |
| spellingShingle | Se-Jun Park In-Bok Lee Sang-Yeon Lee Jun-Gyu Kim Young-Bae Choi Cristina Decano-Valentin Jeong-Hwa Cho Hyo-Hyeog Jeong Uk-Hyeon Yeo Numerical Analysis of Ventilation Efficiency of a Korean Venlo-Type Greenhouse with Continuous Roof Vents Agriculture computational fluid dynamics (CFD) eave height natural ventilation venlo greenhouse |
| title | Numerical Analysis of Ventilation Efficiency of a Korean Venlo-Type Greenhouse with Continuous Roof Vents |
| title_full | Numerical Analysis of Ventilation Efficiency of a Korean Venlo-Type Greenhouse with Continuous Roof Vents |
| title_fullStr | Numerical Analysis of Ventilation Efficiency of a Korean Venlo-Type Greenhouse with Continuous Roof Vents |
| title_full_unstemmed | Numerical Analysis of Ventilation Efficiency of a Korean Venlo-Type Greenhouse with Continuous Roof Vents |
| title_short | Numerical Analysis of Ventilation Efficiency of a Korean Venlo-Type Greenhouse with Continuous Roof Vents |
| title_sort | numerical analysis of ventilation efficiency of a korean venlo type greenhouse with continuous roof vents |
| topic | computational fluid dynamics (CFD) eave height natural ventilation venlo greenhouse |
| url | https://www.mdpi.com/2077-0472/12/9/1349 |
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