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Αποτελέσματα 11-20 από 69
The effect of vent configuration and insect screens on greenhouse microclimate
(2005)
The influence of insect screens and vent configurations on airflow and temperature patterns in an arched plastic covered greenhouse used for cultivating tomatoes was analysed using a commercial computational fluid dynamics ...
Improving the efficiency of insect screens in greenhouses
(2009)
A CFD code was used in order to study the influence of different types of insect screens on greenhouse microclimate and natural ventilation performance. The validity of the code was checked against experimental data. The ...
Dispersion of pesticides from a naturally ventilated greenhouse: A CFD approach
(2006)
A methodology of application of a numerical technique in order to simulate the dispersion of pesticides from greenhouses is presented. The proposed simulation approach is based on preliminary calculations that concern the ...
Analysis of airflow through experimental rural buildings: Sensitivity to turbulence models
(2007)
Full-scale experimental data and computational fluid dynamics (CFD) methods are used to determine the accuracy of four different turbulence models [standard k-ε, k-ε renormalisation group (RNG), k-ε realisable, Reynolds ...
Numerical simulation of the airflow and temperature patterns in a greenhouse equipped with insect-proof screen in the openings
(2002)
An analysis of the ventilation process in a tunnel greenhouse equipped with an insect-proof screen in the side openings was performed with the use of a commercial computational fluid dynamics (CFD) package (CFD2000®). The ...
Influence of the heating method on greenhouse microclimate and energy consumption
(2005)
The influence of the heating system method on greenhouse microclimate was investigated overnight, using an experimental greenhouse tunnel with a tomato crop. The heating system consisted of plastic heating pipes located ...
Numerical and experimental analysis of convective heat transfer in a heated greenhouse
(2008)
Internal convective flows, resulted from buoyancy forces, in a greenhouse tunnel were numerically and experimentally analysed and discussed. Experiments were performed in an experimental arc type tunnel greenhouse with a ...
Influence of whitening on greenhouse microclimate and crop energy partitioning
(2001)
The influence of whitening a greenhouse roof on microclimate and canopy behaviour was studied during summer in a greenhouse located in the coastal area of eastern Greece. Measurements of microclimate variables, intercepted ...
Crop-climate coupling in greenhouses. characterization and analysis
(2005)
The present work analyses the degree of coupling between a greenhouse rose crop and the internal climate as a function of crop characteristics (leaf area index, LAI) and greenhouse climate functions (natural and forced ...
Influence of vent design on greenhouse microclimate during dehumidification with simultaneous heating and ventilation
(2006)
The influence of greenhouse vent configuration on greenhouse microclimate and energy consumption when natural ventilation was used for greenhouse dehumidification was numerically analysed using a computational fluid dynamics ...