Πλοήγηση ανά Συγγραφέα "Bartzanas, T."
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Influence of two new greenhouse covering materials on greenhouse microclimate and cooling load
Kitta, E.; Bartzanas, T.; Katsoulas, N. (2012)Aim of this paper was to study the effects of a new polyethylene (PE) film with high reflectance and absorption in near infrared radiation (NIR-PE) and of a new PE film with low transmittance in infrared radiation IR ... -
Influence of vent design on greenhouse microclimate during dehumidification with simultaneous heating and ventilation
Bartzanas, T.; Kittas, C. (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 ... -
Investigation of flow patterns in a greenhouse with mechanically assisted ventilation
Fidaros, D.; Baxevanou, C.; Bartzanas, T.; Kittas, C. (2011)In the present work, the effect of fan ventilation in an arc type tunnel greenhouse under the encumbering action of solar radiation is studied. Results are accrued for the air velocity, temperature, pressure, vapour and ... -
Measurements and modelling of tracer gas distribution in a naturally ventilated greenhouse for pesticide dispersion determination
Kittas, C.; Bartzanas, T.; Katsoulas, N.; Sapounas, A. A. (2006)In this study numerical and experimental results concerning the dispersion of a tracer gas (N2O) inside an experimental greenhouse with a tomato crop were presented and analyzed. The proposed simulation concerns a greenhouse ... -
Microclimate Distribution in a Greenhouse Cooled by a Fog System
Katsoulas, N.; Kittas, C.; Bartzanas, T. (2012)The aim of this study was to characterise the microclimate distribution in a greenhouse cooled by a mist system in comparison to the microclimate distribution of a roof ventilated greenhouse. For this purpose, air temperature, ... -
Microclimate of a pepper crop under screenhouse conditions
Rigakis, N.; Katsoulas, N.; Kittas, C.; Kitta, E.; Bartzanas, T. (2012)In the present study, the influence of three different shading nets with different colour, shading intensity and porosity on the screenhouse and crop microclimate was experimentally investigated. The experiments were carried ... -
Minimizing environmental impact from applying selected inputs in plant production
Sørensen, C. G.; Bochtis, D. D.; Bartzanas, T.; Katsoulas, N.; Kittas, C. (2012) -
Monitoring particulate matter levels and climate conditions in a Greek sheep and goat livestock building
Papanastasiou, D. K.; Fidaros, D.; Bartzanas, T.; Kittas, C. (2011)Atmospheric pollutants from livestock operations influence air quality inside livestock buildings and the air exhausted from them. The climate that prevails inside the building affects human and animal health and welfare, ... -
Numerical and experimental analysis of convective heat transfer in a heated greenhouse
Bartzanas, T.; Tadj, N.; Draoui, B.; Kittas, C. (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 ... -
Numerical and experimental assessment of the airflow field and ventilation rates in a naturally ventilated free cubical cattle house with large openings
Bartzanas, T.; Zhang, G.; Norton, T.; Wu, W.; Papanastasiou, D. K.; Kittas, C. (2013)An efficient natural ventilation system in dairy cattle buildings is essential both for animal welfare and for environmental issues since the naturally ventilated livestock buildings are a major source of greenhouse gas ... -
Numerical modelling and experimental measurements of pesticides dispersion in a naturally ventilated greenhouse
Kittas, C.; Katsoulas, N.; Tsiropoulos, N.; Bartzanas, T.; Sapounas, A. A. (2008)In the present study a commercial CFD code was used in order to investigate the dispersion of a pesticide inside an arch type tunnel greenhouse with continuous side vents. The greenhouse was cultivated with a tomato crop ... -
Numerical simulation of the airflow and temperature distribution in a tunnel greenhouse equipped with insect-proof screen in the openings
Bartzanas, T.; Boulard, T.; Kittas, C. (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(R)). ... -
Numerical simulation of the airflow and temperature patterns in a greenhouse equipped with insect-proof screen in the openings
Bartzanas, T.; Kittas, C.; Boulard, T. (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 ... -
Numerical simulation of thermal behavior of a ventilated arc greenhouse during a solar day
Fidaros, D. K.; Baxevanou, C. A.; Bartzanas, T.; Kittas, C. (2010)In the present study the transport phenomena occurring inside a ventilated arc type tunnel greenhouse are simulated during a solar day taking into account the optical properties of plants only in the photosynthetic active ... -
Pepper crop production under shading and insect proof screenhouses
Rigakis, N.; Katsoulas, N.; Belitsiotis, P.; Kittas, C.; Bartzanas, T. (2014)Aim of this study was to experimentally investigate the effect of three different shading and insect proof nets on pepper crop development and production. Three screenhouses were used; two of them were covered by a 50 mesh ... -
Performance test of a Na+ accumulation model as part of a decision support system for closed hydroponic systems management
Katsoulas, N.; Kakavikakis, G.; Kittas, C.; Bartzanas, T.; Savvas, D. (2012)The recycling of greenhouse effluents in soilless cultivation systems is environment-friendly, since the waste of water and the disposal of nutrients to the environment is drastically reduced or even eliminated. However, ... -
Preliminary findings on seasonal heat stress of sheep
Papanastasiou, D. K.; Bartzanas, T.; Panagakis, P.; Kittas, C. (2012)This paper studies the heat stress conditions imposed onto sheep housed in a naturally ventilated sheep barn during the four seasons of a year. The barn is located near the east coast of central Greece. Heat stress is ... -
A simple model for ventilation rate determination in screenhouses
Rigakis, N.; Katsoulas, N.; Teitel, M.; Bartzanas, T.; Kittas, C. (2015)The objective of this work was to study and model the ventilation rate in screenhouses. Thus, microclimate variables and crop transpiration as well as the air velocity were measured in three screenhouses covered by different ... -
Solar radiation distribution in a tunnel greenhouse
Baxevanou, C.; Bartzanas, T.; Fidaros, D.; Kittas, C. (2008)A commercial computational fluid dynamics code was used in order to investigate numerically the effect of solar radiation in an arc type tunnel greenhouse equipped with continuous side vents with a tomato crop. For the ... -
Solar radiation distribution in screenhouses: A CFD approach
Bartzanas, T.; Katsoulas, N.; Kittas, C. (2012)In this paper the effect of solar radiation distribution in a typical screenhouse was numerically investigated, taking into account the thickness and aerodynamic properties of the screen and its spectral, optical and thermal ...