Wind-Induced Heat Transfer Coefficients from Glasshouses

ABSTRACT WIND heat transfer coefficients from a pentagonal-shaped model glasshouse were investigated. A large blow-down type of wind tunnel was used. Spires were employed to create thick boundary layers. Velocity pro-files resembling those over grassland terrain were created by spreading corrugated cardboard throughout the wind tunnel floor. Wind velocities were varied from 4 to 18 m/s. Effects of wind direction were investigated. Under the above conditions, mean average wind coefficients are represented by the following correlation: where h is in W/m2 °C. The present investigation gives values of the heat transfer coefficient higher than those reported by earlier workers for flow parallel to flat walls.