Articles
CLIMATE DISTRIBUTION IN A FAN AND PAD EVAPORATIVE COOLED GREENHOUSE: A CFD APPROACH
Article number
1008_24
Pages
185 – 190
Language
English
Abstract
Climate distribution in an evaporative (fan and pad) cooled greenhouse was numerically assessed with the use of a computational fluids dynamic model.
For the simulations needs a 3D model was built representing a typical Mediterranean greenhouse (plastic tunnel with arc walls) with a tomato crop, 1.5 m high.
The numerical model was first validated against experimental data and then it was used for case studies aiming to improve the design of evaporative cooling systems.
In general a good agreement was found between simulated and measured results with their differences not exceed the limit of (4%). An increase of 16.5% of fan airflow rate, leads to a 18% decrease of inside air temperature and to a 22% decrease of air relative humidity.
In parallel mean air velocity inside the greenhouse was increased by 15%.
For the simulations needs a 3D model was built representing a typical Mediterranean greenhouse (plastic tunnel with arc walls) with a tomato crop, 1.5 m high.
The numerical model was first validated against experimental data and then it was used for case studies aiming to improve the design of evaporative cooling systems.
In general a good agreement was found between simulated and measured results with their differences not exceed the limit of (4%). An increase of 16.5% of fan airflow rate, leads to a 18% decrease of inside air temperature and to a 22% decrease of air relative humidity.
In parallel mean air velocity inside the greenhouse was increased by 15%.
Authors
T. Bartzanas, D. Fidaros, C. Baxevanou , C. Kittas
Keywords
air speed profiles, air temperature, CFD modelling, greenhouse climate heterogeneity, relative humidity
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