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Article

Dynamic Energy Exchange Modelling for a Plastic-Covered Multi-Span Greenhouse Utilizing a Thermal Effluent from Power Plant

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Department of Rural Systems Engineering, Research Institute for Agriculture and Life Sciences, College of Agriculture and Life Sciences, Seoul National University, Gwanakno 1, Gwanakgu, Seoul 08826, Korea
2
Research Institute for Agriculture and Life Sciences, College of Agriculture and Life Sciences, Seoul National University, Gwanakno 1, Gwanakgu, Seoul 08826, Korea
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Department of Smart Farm Engineering, College of Industrial Sciences, Kongju National University, 54 Daehak-ro, Yesan-eup, Yesan-gun 32439, Korea
4
Department of Agricultural and Biosystems Engineering, College of Engineering, Mariano Marcos State University, Batac 2906, Philippines
*
Author to whom correspondence should be addressed.
Academic Editor: Miguel-Ángel Muñoz-García
Agronomy 2021, 11(8), 1461; https://doi.org/10.3390/agronomy11081461
Received: 31 May 2021 / Revised: 16 July 2021 / Accepted: 20 July 2021 / Published: 22 July 2021
To utilize the energy in the thermal effluent, many attempts have been made to use the thermal effluent for agricultural facilities such as greenhouses. As the first step, it is important to estimate the energy loads of the greenhouse for deciding a suitable scale for the heating and cooling. Then, it is available to estimate the energy efficiency of the thermal effluent heat pump system installed in the greenhouse. Therefore, the main objectives of this study were to design and validate an energy model of the experimental greenhouse growing Irwin mangoes and to estimate the annual and maximum energy loads using building energy simulation (BES). Field experiments were conducted in a multi-span plastic-covered greenhouse growing Irwin mangoes to measure the internal environments of the greenhouse and crop characteristics. The energy exchange model of the greenhouse considering crop, cladding, heat pump was developed using BES. The BES model was validated using the data measured at field experiments. The designed model was found to be able to provide satisfactory estimates of the changes of the internal air temperature of the greenhouse (R2 = 0.94 and d = 0.97). The hourly energy loads computed by using the validated model were used to analyse the periodic and maximum energy loads according to the growth stage of the cultivated crops. Finally, the energy costs were compared according to the type of energy source based on the calculated annual energy loads. The average energy cost when using the thermal effluent—heat pump system was found to be 68.21% lower than that when a kerosene boiler was used. View Full-Text
Keywords: crop energy exchange; dynamic energy model; greenhouse; information and communication technology; thermal effluent crop energy exchange; dynamic energy model; greenhouse; information and communication technology; thermal effluent
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MDPI and ACS Style

Lee, S.-y.; Lee, I.-b.; Lee, S.-n.; Yeo, U.-h.; Kim, J.-g.; Kim, R.-w.; Decano-Valentin, C. Dynamic Energy Exchange Modelling for a Plastic-Covered Multi-Span Greenhouse Utilizing a Thermal Effluent from Power Plant. Agronomy 2021, 11, 1461. https://doi.org/10.3390/agronomy11081461

AMA Style

Lee S-y, Lee I-b, Lee S-n, Yeo U-h, Kim J-g, Kim R-w, Decano-Valentin C. Dynamic Energy Exchange Modelling for a Plastic-Covered Multi-Span Greenhouse Utilizing a Thermal Effluent from Power Plant. Agronomy. 2021; 11(8):1461. https://doi.org/10.3390/agronomy11081461

Chicago/Turabian Style

Lee, Sang-yeon, In-bok Lee, Seung-no Lee, Uk-hyeon Yeo, Jun-gyu Kim, Rack-woo Kim, and Cristina Decano-Valentin. 2021. "Dynamic Energy Exchange Modelling for a Plastic-Covered Multi-Span Greenhouse Utilizing a Thermal Effluent from Power Plant" Agronomy 11, no. 8: 1461. https://doi.org/10.3390/agronomy11081461

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