Sonic Anemometry to Measure Natural Ventilation in Greenhouses
The present work has developed a methodology for studying natural ventilation in Mediterranean greenhouses by means of sonic anemometry. In addition, specific calculation programmes have been designed to enable processing and analysis of the data recorded during the experiments. Sonic anemometry all...
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MDPI AG
2011-10-01
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Online Access: | http://www.mdpi.com/1424-8220/11/10/9820/ |
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doaj-99ff3b54dc0841d6a5e590bc9404ba6e2020-11-25T00:44:44ZengMDPI AGSensors1424-82202011-10-0111109820983810.3390/s111009820Sonic Anemometry to Measure Natural Ventilation in GreenhousesFrancisco Molina-AizDiego Luis ValeraAlejandro LópezThe present work has developed a methodology for studying natural ventilation in Mediterranean greenhouses by means of sonic anemometry. In addition, specific calculation programmes have been designed to enable processing and analysis of the data recorded during the experiments. Sonic anemometry allows us to study the direction of the airflow at all the greenhouse vents. Knowing through which vents the air enters and leaves the greenhouse enables us to establish the airflow pattern of the greenhouse under natural ventilation conditions. In the greenhouse analysed in this work for Poniente wind (from the southwest), a roof vent designed to open towards the North (leeward) could allow a positive interaction between the wind and stack effects, improving the ventilation capacity of the greenhouse. The cooling effect produced by the mass of turbulent air oscillating between inside and outside the greenhouse at the side vents was limited to 2% (for high wind speed, uo ≥ 4 m s−1) reaching 36.3% when wind speed was lower (uo = 2 m s−1).http://www.mdpi.com/1424-8220/11/10/9820/sonic anemometrygreenhouseventilationinsect-proof screens |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Francisco Molina-Aiz Diego Luis Valera Alejandro López |
spellingShingle |
Francisco Molina-Aiz Diego Luis Valera Alejandro López Sonic Anemometry to Measure Natural Ventilation in Greenhouses Sensors sonic anemometry greenhouse ventilation insect-proof screens |
author_facet |
Francisco Molina-Aiz Diego Luis Valera Alejandro López |
author_sort |
Francisco Molina-Aiz |
title |
Sonic Anemometry to Measure Natural Ventilation in Greenhouses |
title_short |
Sonic Anemometry to Measure Natural Ventilation in Greenhouses |
title_full |
Sonic Anemometry to Measure Natural Ventilation in Greenhouses |
title_fullStr |
Sonic Anemometry to Measure Natural Ventilation in Greenhouses |
title_full_unstemmed |
Sonic Anemometry to Measure Natural Ventilation in Greenhouses |
title_sort |
sonic anemometry to measure natural ventilation in greenhouses |
publisher |
MDPI AG |
series |
Sensors |
issn |
1424-8220 |
publishDate |
2011-10-01 |
description |
The present work has developed a methodology for studying natural ventilation in Mediterranean greenhouses by means of sonic anemometry. In addition, specific calculation programmes have been designed to enable processing and analysis of the data recorded during the experiments. Sonic anemometry allows us to study the direction of the airflow at all the greenhouse vents. Knowing through which vents the air enters and leaves the greenhouse enables us to establish the airflow pattern of the greenhouse under natural ventilation conditions. In the greenhouse analysed in this work for Poniente wind (from the southwest), a roof vent designed to open towards the North (leeward) could allow a positive interaction between the wind and stack effects, improving the ventilation capacity of the greenhouse. The cooling effect produced by the mass of turbulent air oscillating between inside and outside the greenhouse at the side vents was limited to 2% (for high wind speed, uo ≥ 4 m s−1) reaching 36.3% when wind speed was lower (uo = 2 m s−1). |
topic |
sonic anemometry greenhouse ventilation insect-proof screens |
url |
http://www.mdpi.com/1424-8220/11/10/9820/ |
work_keys_str_mv |
AT franciscomolinaaiz sonicanemometrytomeasurenaturalventilationingreenhouses AT diegoluisvalera sonicanemometrytomeasurenaturalventilationingreenhouses AT alejandrolopez sonicanemometrytomeasurenaturalventilationingreenhouses |
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