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COMPUTATIONAL FLUID DYNAMICS AND PERFORMANCE EVALUATION OF A CHIMNEY SOLAR DRYER FOR CHILLI PEPPER CIGR Journal
Kumi, Francis.
The postharvest losses of agricultural produce in Ghana and other developing countries is high. Efforts to promote shelf-life extension of the fresh produce is centred around temperature and moisture management. Moisture control by drying is suited to a number of crops as it inhibits microbial decay and physiological processes of deterioration. However, there are often inefficient drying infrastructure in developing countries. Thus, the focus of this research was to structurally modify a chimney solar dryer originally designed by the Horticulture Innovation Laboratory of the University of California, Davis and include sea pebbles in the collector base to enhance its heating system and drying performance.  A computational fluid dynamics analysis using ANSYS...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Chimney; Dryer; Computational fluid dynamics; Simulation; Moisture content.
Ano: 2022 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/7005
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Estimating okra leaf area index using unmanned aerial vehicle imagery CIGR Journal
Kumi, Francis; Adade, Richard; Darko, Ransford Opoku; Ekumah, Bernard; Osei, Gilbert.
The study aimed at estimating the leaf area index of okra using vegetative indices obtained by analysing image data obtained from a low-cost Unmanned Aerial Vehicle (UAV) in Ghana. Additionally, the work also assessed which of the two indices commonly used (excess green (ExG) and normalized green-red difference index (NGRDI) ) gave a better estimation of leaf area indices. The study was conducted in Cape Coast in southern Ghana at the experimental site located on the University of Cape Coast’s Teaching and Research Farm. The experiment was arranged in a randomised complete block design (RCBD) with four treatments (2cm, 3cm, 5cm and 7cm sowing depths) and four replicate blocks. This resulted in sixteen (16) plots each measuring 3 m by 3m. Overall, it was...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Unmanned aerial vehicle; Geographic information system; Vegetative index; Leaf area; Okra.
Ano: 2021 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/6031
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