Abstract
Energy consumption, husking ratio, crack ratio and broken rice ratio with respect to various rotational speed (N) of the dehulling fan (700-3000rpm) were measured from dehulling experiments of the commercial rice husker with a standard impeller blade and a new type of blade. The new type of blade was so designed as to get less bouncing of paddy grain at the surface of the blade considering normal force distribution.
Energy consumption was proportional to N2, which is agreed with the law of proportion in terms of rotating angular velocity proposed by the first author in the former report (part I).
Husking ratio was expressed by the Weibull distribution function with respect to energy consumption. Crack ratio and broken rice ratio for the newly designed blade, were lower than those for the standard blade.
