A prototype pump performance converted from that of a model pump shows an increase in efficiency. This paper
discusses whether such increase is related to an increase in pump head and/or to a decrease in input power, based on the
relationship between ...
A prototype pump performance converted from that of a model pump shows an increase in efficiency. This paper
discusses whether such increase is related to an increase in pump head and/or to a decrease in input power, based on the
relationship between the tangential force on impeller blades, head loss and input power. This study revealed that the
efficiency increase was brought about not only by an increase in head, but also by a decrease in input power, as the
tangential force on the blades constitutes a part of the input power of a pump. A solution is proposed on how the
hydraulic efficiency increase of a prototype pump should be related to its head and input power.