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Numerical Analysis of Ventilation Efficiency of a Korean Venlo-Type Greenhouse with Continuous Roof Vents

Author

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  • Se-Jun Park

    (Department 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, Korea)

  • In-Bok Lee

    (Department 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, Korea
    Research Institute of Green Eco Engineering, Institute of Green Bio Science and Technology, Seoul National University, 1477, Pyeongchang-daero, Daehwa-myeon, Pyeongchang-gun 25354, Korea)

  • Sang-Yeon Lee

    (Department 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, Korea)

  • Jun-Gyu Kim

    (Department 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, Korea)

  • Young-Bae Choi

    (Department 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, Korea)

  • Cristina Decano-Valentin

    (Department 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, Korea
    Department of Agricultural and Biosystems Engineering, College of Engineering, Mariano Marcos State University, Batac 2906, Philippines)

  • Jeong-Hwa Cho

    (Department 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, Korea)

  • Hyo-Hyeog Jeong

    (Department 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, Korea)

  • Uk-Hyeon Yeo

    (Agriculture, Animal & Aquaculture Intelligence Research Center, Electronics and Telecommunications Research Institute, 218 Gajeong-ro, Yuseong-gu, Daejeon 34129, Korea)

Abstract

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.

Suggested Citation

  • 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, 2022. "Numerical Analysis of Ventilation Efficiency of a Korean Venlo-Type Greenhouse with Continuous Roof Vents," Agriculture, MDPI, vol. 12(9), pages 1-22, August.
    • Handle: RePEc:gam:jagris:v:12:y:2022:i:9:p:1349-:d:903298
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    References listed on IDEAS

    as
    1. Fidaros, D.K. & Baxevanou, C.A. & Bartzanas, T. & Kittas, C., 2010. "Numerical simulation of thermal behavior of a ventilated arc greenhouse during a solar day," Renewable Energy, Elsevier, vol. 35(7), pages 1380-1386.
    2. Uk-Hyeon Yeo & Sang-Yeon Lee & Se-Jun Park & Jun-Gyu Kim & Young-Bae Choi & Rack-Woo Kim & Jong Hwa Shin & In-Bok Lee, 2022. "Rooftop Greenhouse: (1) Design and Validation of a BES Model for a Plastic-Covered Greenhouse Considering the Tomato Crop Model and Natural Ventilation Characteristics," Agriculture, MDPI, vol. 12(7), pages 1-25, June.
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