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dc.contributor.authorMolina Aiz, Francisco Domingo 
dc.contributor.authorValera Martínez, Diego Luis 
dc.contributor.authorPeña Fernández, Ana Araceli 
dc.contributor.authorLópez Martínez, Alejandro 
dc.date.accessioned2023-11-28T11:52:25Z
dc.date.available2023-11-28T11:52:25Z
dc.date.issued2009-07-16
dc.identifier.issn1537-5110
dc.identifier.issn1537-5129
dc.identifier.urihttp://hdl.handle.net/10835/14688
dc.description.abstractThe wind coefficient of an Almería-type greenhouse has been calculated from direct estimation of airflow at the openings by means of three-dimensional sonic anemometry. Measurements were taken with a strong northeast wind (Levante) and with a weak westerly wind (Poniente). For the model considering only the wind effect, the coefficient of effectiveness obtained was EV = CdCw0.5 = 0.050, and the values of the mean and turbulent wind coefficients were Cw = 0.066 and Cw′ = 0.029, respectively. Two important characteristics of the Almería-type greenhouse analysed in this work make natural ventilation difficult: the presence of mature tomato plants inside the greenhouse and of an obstacle close to one of the side openings, which affected the air movement throughout it. Discharge coefficients due to the presence of screens in the greenhouse (Cd,φ = 0.156–0.245) were calculated from wind-tunnel measurements, obtaining a total discharge coefficient of Cd = 0.193. Use of the anti-aphid screen in the openings can cause an approximately 71% reduction of Cd and consequently of the wind-related coefficient EV. Winds perpendicular to the axis produce an inflow through the side opening free of obstacles and an outflow through the roof vents. In qualitative terms, this airflow pattern is in good agreement with previous simulations using Computational Fluid Dynamics.es_ES
dc.language.isoenes_ES
dc.relationProyecto AGL2006-09068/AGRes_ES
dc.titleA study of natural ventilation in an Almería-type greenhouse with insect screens by means of tri-sonic anemometryes_ES
dc.typeinfo:eu-repo/semantics/articlees_ES
dc.rights.accessRightsinfo:eu-repo/semantics/openAccesses_ES
dc.identifier.doihttps://doi.org/10.1016/j.biosystemseng.2009.06.013


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