The Application of Passive Radiative Cooling in Greenhouses

Chia-Hsin Liu, Chyung Ay, Chun-Yu Tsai and Maw-Tien Lee
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Chia-Hsin Liu: Department of Applied Chemistry, National Chia Yi University, Chiayi 60004, Taiwan
Chyung Ay: Department of Biomechatronic Engineering, National Chia Yi University, Chiayi 60004, Taiwan
Chun-Yu Tsai: Program of Agriculture Science, National Chiayi University, Chiayi 60004, Taiwan
Maw-Tien Lee: Department of Applied Chemistry, National Chia Yi University, Chiayi 60004, Taiwan

Sustainability, 2019, vol. 11, issue 23, 1-9

Abstract: At present, greenhouses are used to grow a variety of crops around the world. However, with the change of climate, the increasingly harsh weather makes it more and more disadvantageous for people to work inside, and plants are difficult to grow. Previous research has illustrated that radiative cooling can be realized by using certain nonmetal oxide particles created for emission in an infrared atmospheric transparency window, which is an environmentally friendly cooling method due to reducing energy consumption. Polyethylene (PE)-based formulations with a UV stabilizer and nonmetal oxide particles (NOP) were first granulated and then formed a monolayer film by co-injection molding. The experimental results show that due to passive radiative cooling, under the environmental conditions of 35 °C, and only considering the natural convection heat transfer, the net cooling power of the greenhouse film developed in this study is 28 W·m −2 higher than that of the conventional PE film. The temperature inside the simulated greenhouse cladded with the new greenhouse covering was on average 2.2 °C less than that of the greenhouse with the conventional PE film.

Keywords: covering material; passive cooling; infrared atmospheric transparency window (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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