Study of the influence of a pelmet type wind deflector on indoor air motion

Abstract

This paper describes a study of the performance of pelmet-type wind deflectors. The influence of dimensions and location of the deflector on the magnitude of indoor air motion at various levels above the floor is discussed. It is observed that the availability of air movement at a working plane 0.4 m above the floor can be enhanced by 30 per cent using a pelmet type deflector (height and width equal to 1/4 and 1/6 of the window height respectively) on the inlet. Air motion indoors is reduced when the deflector is fitted on the outlet but the decrease is negligible for a deflector of these dimensions.