DETERMINATION OF OVERALL HEAT TRANSFER COEFFICIENT FOR GREENHOUSE ENERGY-SAVING SCREEN USING TRNSYS AND HOTBOX

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dc.contributor.authorRabiu, Anis
dc.contributor.authorNa, Wook Ho
dc.contributor.authorAkpenpuun, Timothy Denen
dc.contributor.authorAdesanya, Misbaudeen Aderemi
dc.contributor.authorOgunlowo, Qazeem Opeyemi
dc.contributor.authorKim, Hyeon-Tae
dc.contributor.authorLee, Hyun-Woo
dc.date.accessioned2024-04-17T09:00:30Z
dc.date.available2024-04-17T09:00:30Z
dc.date.issued2022
dc.description.abstractThe high energy consumption in the greenhouse during the winter season necessitates the development of various thermal screens for energy-saving purposes. However, there is limited data on the precise properties of thermal screens, while little research has investigated a methodological approach for measuring the screen's energy-saving capacity for greenhouse energy efficiency. This research aims to determine the thermophysical, radiative, and aerodynamic properties of selected commercial greenhouse thermal screens. The transient system simulation (TRNSYS) model was used to simulate the heat flux and derive the thermal retention qualities of the thermal screens through their measured properties. The model was validated by comparing the simulated and experimental heat transfer coefficients, expressed as the overall heat transfer coefficient (U-value), thereby determining the thermal retention of the screens. In addition, the simulated U-value was compared to the experimental U-value in material permeability to investigate the influence of screen porosity on heat loss. The statistical analysis t-test was conducted to compare the U-values obtained from the simulation and the experimental hotbox. The simulated Uvalues (for computed permeability) indicated that samples M1 and M3 exhibited the lowest U-value of 4.4 W m 2 K 1, while white polyester, Luxous, PH-super, PH-66, M2, Clima45 (0), and New-Lux showed higher U-values of 82%, 105%, 161%, 123%, 41%, 102%, and 118%,Uvalde respectively. Because of their low material porosity, M1, M2, and M3 samples showed better greenhouse thermal retention over others. Conclusively, the permeability features of the greenhouse energy screen materials have a substantial impact on their U-values.
dc.description.sponsorshipThis work was supported by the Korea Institute of Planning and Evaluation for Technology in Food, Agriculture, Forestry (IPET) through Agriculture, Food and Rural Affairs Convergence Technologies Program for Educating Creative Global Leader, funded by Ministry of Agriculture, Food and Rural Affairs (MAFRA) (717001-7). This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF), funded by the Ministry of Education [NRF-2019R1I1A3A01051739].
dc.identifier.otherhttps://doi.org/10.1016/j.biosystemseng.2022.03.002
dc.identifier.urihttps://uilspace.unilorin.edu.ng/handle/123456789/12105
dc.language.isoen
dc.publisherBiosystems Engineering
dc.relation.ispartofseries217
dc.subjectThermal screen
dc.subjectPermeability
dc.subjectAirflow
dc.subjectTRNSYS
dc.subjectHotbox
dc.titleDETERMINATION OF OVERALL HEAT TRANSFER COEFFICIENT FOR GREENHOUSE ENERGY-SAVING SCREEN USING TRNSYS AND HOTBOX
dc.typeArticle

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