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חיפוש מתקדם
Teitel, M., Agricultural Engineering Institute, Agric. Res. Org., Volcani Ctr., P.O., Bet Dagan, Israel
Tanny, J., Ctr. for Technol. Education Holon, P.O. Box 305, 58102, Holon, Israel
A theoretical and experimental study was conducted to investigate the transient response of the greenhouse air temperature and humidity, to the opening of roof windows. A theoretical model, based on non-dimensional mass and energy conservation equations was developed and similarity solutions were obtained. The model was calibrated against the results of experiments conducted in a full-scale greenhouse and the model parameters were identified. The study shows that opening the roof windows results in a decrease with time of the air temperature and humidity ratio and an approach to a steady-state. The effect of various physical parameters such as height of window opening, wind speed and solar radiation on the ventilation process, was studied by the model. The results show that the effect of the ventilation (i.e. the reduction in the temperature and humidity ratio within the greenhouse) increases with the height of the window opening and the wind speed and decreases with the solar radiation.
פותח על ידי קלירמאש פתרונות בע"מ -
הספר "אוצר וולקני"
אודות
תנאי שימוש
Natural ventilation of greenhouses: Experiments and model
96
Teitel, M., Agricultural Engineering Institute, Agric. Res. Org., Volcani Ctr., P.O., Bet Dagan, Israel
Tanny, J., Ctr. for Technol. Education Holon, P.O. Box 305, 58102, Holon, Israel
Natural ventilation of greenhouses: Experiments and model
A theoretical and experimental study was conducted to investigate the transient response of the greenhouse air temperature and humidity, to the opening of roof windows. A theoretical model, based on non-dimensional mass and energy conservation equations was developed and similarity solutions were obtained. The model was calibrated against the results of experiments conducted in a full-scale greenhouse and the model parameters were identified. The study shows that opening the roof windows results in a decrease with time of the air temperature and humidity ratio and an approach to a steady-state. The effect of various physical parameters such as height of window opening, wind speed and solar radiation on the ventilation process, was studied by the model. The results show that the effect of the ventilation (i.e. the reduction in the temperature and humidity ratio within the greenhouse) increases with the height of the window opening and the wind speed and decreases with the solar radiation.
Scientific Publication
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