Knissel J.
Bibliographic info:
HLH 4/2004, pp 40-45, 6 Fig., 1 Tab., 6 Ref.

The author describes how to improve the usual formula to calculate air flow rate through an opened hopper window.Improvements consist in better taking into account the geometry of such windows when estimating their opened area and also in adapting to this type of windows the model used to take into account the influence of wind and of thermal draught.Improved model gives a good comparison with on site measured data from the literature.