The determination of natural ventilation efficiency and chatacteristics in banana greenhouse in Anamur region

The main objective of this study is to determine the natural ventilation efficiency and climatic properties of the banana greenhouses in Anamur region. Structural and functional properties of the different greenhouses where banana are grown were determined with survey studies. Air temperature and relative humidity values at different locations and heights were measured in two types of greenhouses which represent the banana greenhouses in the Anamur region. Natural ventilation rates per floor area were calculated in low and high types banana greenhouses. Natural ventilation openings ratios in the banana greenhouses were calculated according to Anamur climate. In winter period during the day time, the air temperature at 1.5 m height in low and high types greenhouses were changed in 26.839.8 C and 2734.6 C, respectively. The air temperature differences at 1.5 m height and gutter height were 5.2 C and 2.9 C in low and high greenhouses, respectively. In winter period during the day time, the average relative humidity was 79.3% and 86.4 in low and high type greenhouses. The natural ventilation rate was varied in the range of 43.188.4 m3/s in low type greenhouse while it was changed between 41.7 m3/s and 67.3 m3/s in high type greenhouse. Specific ventilation rate was calculated as 1.37 m3/m2 min and 1.01 m3/m2 min in low and high type greenhouses. An average air exchange number was found to be 16.11 and 8.74 in low and high type greenhouses. For the banana greenhouses the minimum ventilation opening ratio based on the greenhouse ground surface was found to be 8.7% for winter conditions of Anamur region. Key Words: Natural Ventilation, Greenhouse, Anamur, Banana