AIRFLOW PATTERNS AND ASSOCIATED VENTILATION FUNCTION IN LARGE-SCALE MULTI-SPAN GREENHOUSES

摘要

Understanding airflow patterns in greenhouses is essential for developing optimal natural ventilation systems. Experiments of air velocity distributions in the vertical and horizontal planes were conducted in a large multi-span greenhouse using a customized multi-point, two-dimensional sonic anemometer system. The experimental results showed that the vertical and horizontal profiles of normalized interior air velocities were well described by simple linear functions (R2 = 0.55-0.92). Based on the knowledge of airflow patterns within the greenhouse, a widely used nondimensional ventilation function was revised and then compared with those of similar studies in the literature.