COMPARATIVE ANALYSIS OF THE MICRO-ENVIRONMENTS OF SINGLE-SPAN TRIPLE-LAYERED GREENHOUSES UNDER DIFFERENT AIRFLOW SYSTEMS

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dc.contributor.authorTimothy Denen Akpenpuun
dc.contributor.authorQazeem Opeyemi Ogunlowo
dc.contributor.authorWook-Ho Na
dc.contributor.authorAnis Rabiu
dc.contributor.authorMisbaudeen Aderemi Adesanya
dc.contributor.authorPrabhat Dutta
dc.contributor.authorEzatullah Zakir
dc.contributor.authorOluwasegun Moses Ogundele
dc.contributor.authorHyun-Woo Lee
dc.date.accessioned2024-04-24T10:13:20Z
dc.date.available2024-04-24T10:13:20Z
dc.date.issued2023
dc.description.abstractThe microclimate within indoor production systems is intricately linked to the macroclimate of their surrounding environment, resulting in dynamic fluctuations over time. This study investigated the variations in thermal conditions within two adjacent single-span tunnel greenhouses, each utilizing distinct airflow systems: one equipped with circular airflow fans (HUMITEM-GH) and the other with horizontal airflow fans (Conv-GH). Temperature (Ta), relative humidity (RH), vapor pressure difference (VPD), solar radiation (SR), and carbon dioxide (CO2) levels were monitored using standard methods, and data analysis was conducted using MINITAB software. Statistical analysis included descriptive statistics, analysis of variance (ANOVA), and t-tests. The results of the experiment showed that in the HUMITEM-GH and Conv-GH, the minimum daytime Ta, RH, VPD, SR, and CO2 were 6.24°C, 39.22%, 0.04 kPa, 0.37 W/m², and 318 ppm, and 5.57°C, 19.73%, 0.03 kPa, 0.69 W/m², and 355 ppm, respectively. Whereas the maximum daytime Ta, RH, VPD, SR, and CO2 were 26.81°C, 97.20%, 2.07 kPa, 520.74 W/m², and 2083 ppm, and 26.20°C, 97.79%, 2.25 kPa, 448.68 W/m², and 1514 ppm, respectively. In the same context, climate parameters at night ranged from 6.07°C to 23.77°C, 46.28% to 97.86%, 0.03 kPa to 1.57 kPa, and 344 ppm to 2669 ppm, respectively, for the HUMITEM-GH, and from 5.57°C to 20.84°C, 20.76% to 97.75%, 0.03 kPa to 1.73 kPa, and 356 ppm to 1081 ppm, respectively, for the Conv-GH. There were significant differences between the two greenhouses both in the daytime and nighttime, with the HUMITEM-GH having higher and near-optimal climate parameters than the Conv-GH. These results have shown that the newly developed HUMITEM air circulation fan has superior air circulation and flow capabilities compared to conventional air circulation fans. This information may be of interest to farmers, horticulturists, and researchers involved in protected crop/plant production, offering valuable guidance for optimizing greenhouse environments.
dc.description.sponsorshipThis study was supported by the Korea Institute of Planning, and Evaluation for Technology in Food, Agriculture, Forestry, and Fisheries (IPET) through the Agriculture, Food, and Rural Affairs Convergence Technologies Program for Educating Creative Global Leaders, funded by the Ministry of Agriculture, Food, and Rural Affairs (MAFRA) (717001-7). This research was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (NRF-2019R1I1A3A01051739).
dc.identifier.urihttps://uilspace.unilorin.edu.ng/handle/123456789/12757
dc.language.isoen
dc.publisherJournal of Agricultural Engineering and Technology (JAET)
dc.relation.ispartofseries28; 2
dc.subjectHUMITEM
dc.subjectAir-circulation
dc.subjectDistribution
dc.subjectMonitor
dc.subjectHorizontal airflow
dc.titleCOMPARATIVE ANALYSIS OF THE MICRO-ENVIRONMENTS OF SINGLE-SPAN TRIPLE-LAYERED GREENHOUSES UNDER DIFFERENT AIRFLOW SYSTEMS

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