Journal: BIOSYSTEMS ENGINEERING.
Author: Rack-woo Kim, Se-woon Hong, In-Bok Lee, Kyeong-seok Kwon
Abstract
Revision of greenhouse design standards is required to ensure the structural safety of greenhouses in strong wind environments. The wind pressure coefficients (Cp) of various greenhouses must be evaluated to revise the newly modified greenhouse design standards. In this study, the Cp values of multi-span greenhouses that are typical in South Korea, e.g., wide-span, Venlo, and 1-2W type greenhouses, were estimated using the developed computational fluid dynamics (CFD) model from the first paper. In particular, the CFDcomputed Cp values were analysed with consideration of the wind directions, number of spans, and greenhouse design factors, such as the roof slope and roof curvature radius. Based on the analysed results, the CFD-computed Cp values of multi-span greenhouses were suggested for use in structural and cladding designs based on the defined sections of the greenhouse surface, various wind directions, number of spans and design factors. The Cp values for structural design were analysed for wind blowing in the direction perpendicular to the ridge (0) and in the direction of the ridge (90). In addition, the maximum Cp values were examined for cladding design with consideration of every wind direction.
Keywords : Computational fluid dynamics, Greenhouse, Multi-span, Wind pressure coefficient,
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https://doi.org/10.1016/j.biosystemseng.2017.09.011