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

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dc.contributor.authorAkpenpuun, Timothy
dc.date.accessioned2023-05-02T12:05:18Z
dc.date.available2023-05-02T12:05:18Z
dc.date.issued2022-03-08
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%, 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.en_US
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].en_US
dc.identifier.otherhttps://doi.org/10.1016/j.biosystemseng.2022.03.002
dc.identifier.uriwww.elsevier.com/locate/issn/15375110
dc.identifier.urihttps://uilspace.unilorin.edu.ng/handle/20.500.12484/9461
dc.publisherBiosystems Engineeringen_US
dc.relation.ispartofseries217;
dc.subjectThermal screen; Permeability; Airflow; TRNSYS; Hotboxen_US
dc.titleDETERMINATION OF OVERALL HEAT TRANSFER COEFFICIENT FOR GREENHOUSE ENERGY-SAVING SCREEN USING TRNSYS AND HOTBOXen_US
dc.typeArticleen_US

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