Abstract

Experiments were carried out to determine pressure losses in a 6 ft cube bin of wheat ventilated with various types of lateral duct. The ducts were placed to represent 6 ft and 3 ft centre-to-centre spacings and data established which may be applied directly to the design of floor-duct systems. Pressure drop was shown to depend on the air escape area provided by the ducts and on their spacing: the distribution of the escape area also had an effect. Drying fronts were predicted from isobars and air flow lines for three types of duct at 3 ft centres. A drying test confirmed the general form of the predicted drying fronts.

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