Effects of ventilator configuration on the flow pattern of a naturally-ventilated three-span Mediterranean greenhouse
| Autor: | José Antonio Torres, Alejandro López, Diego L. Valera, F.D. Molina-Aiz, Araceli Peña, Karlos Espinoza |
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| Rok vydání: | 2017 |
| Předmět: |
0106 biological sciences
Mediterranean climate Meteorology Airflow Microclimate Soil Science Greenhouse Natural ventilation 04 agricultural and veterinary sciences Atmospheric sciences 01 natural sciences Volumetric flow rate law.invention Control and Systems Engineering law Ventilation (architecture) 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Environmental science Agronomy and Crop Science Roof 010606 plant biology & botany Food Science |
| Zdroj: | Biosystems Engineering. 164:13-30 |
| ISSN: | 1537-5110 |
| DOI: | 10.1016/j.biosystemseng.2017.10.001 |
| Popis: | Natural ventilation used in agricultural greenhouses is important to control greenhouse microclimate. The effect of the ventilator configuration on the flow pattern of a three-span Mediterranean greenhouse with an obstacle to airflow (a neighbouring greenhouse) was investigated. Two different ventilator configurations, two or three half-arch roof vents with two roll-up side vents, were evaluated using sonic anemometry. It was observed that the flow pattern through the greenhouse depends of the ventilation surfaces distribution and the obstruction to the ventilation system. Moreover, the magnitude and distribution of ventilation surface affected the overall ventilation rate and the ventilation rate at plant level. The ventilator configuration with two roof and two side vents improved air movement at the plant level, although the overall volumetric flow rate was lower than that with three roof and two side vents. |
| Databáze: | OpenAIRE |
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