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Energy Efficiency in Greenhouse Evaporative Cooling Techniques: Cooling Boxes versus Cellulose Pads

Opened Access Energy Efficiency in Greenhouse Evaporative Cooling Techniques: Cooling Boxes versus Cellulose Pads

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Autor: Franco Salas, Antonio
Valera, Diego L.
Peña, Araceli
Departamento: Universidad de Sevilla. Departamento de Ingeniería Aeroespacial y Mecánica de Fluidos
Fecha: 2014
Publicado en: Energies, 2014 (7(3)), 1427-1447.
Tipo de documento: Artículo
Resumen: Evaporative cooling systems using a combination of evaporative pads and extractor fans require greenhouses to be hermetic. The greatest concentration of greenhouses in the world is located in southeast Spain, but these tend not to be hermetic structures and consequently can only rely on fogging systems as evaporative cooling techniques. Evaporative cooling boxes provide an alternative to such systems. Using a low-speed wind tunnel, the present work has compared the performance of this system with four pads of differing geometry and thickness manufactured by two different companies. The results obtained show that the plastic packing in the cooling unit produces a pressure drop of 11.05 Pa at 2 m·s−1 , which is between 51.27% and 94.87% lower than that produced by the cellulose pads. This pressure drop was not influenced by increases in the water flow. The evaporative cooling boxes presented greater saturation efficiency at the same flow, namely 82.63%, as opposed to an aver...
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Cita: Franco Salas, A., Valera, D.L. y Peña, A. (2014). Energy Efficiency in Greenhouse Evaporative Cooling Techniques: Cooling Boxes versus Cellulose Pads. Energies, 2014 (7(3)), 1427-1447.
Tamaño: 1.143Mb
Formato: PDF

URI: http://hdl.handle.net/11441/46282

DOI: 10.3390/en7031427

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