PAT selection

Abstract

A simple methodology for PAT selection starting from the performance of the pump in direct mode is given, based on a number of studies on PAT behavior present in expert literature. The expected errors in terms of head and PAT efficiency between the results of this methodology and the experimental data are also discussed, and the possibility of introducing correction factors based on the internal pump geometry is considered. The reader will be introduced to the design procedure of the PAT in small hydropower plants. In particular, simple methods for the selection of the pump to be used in inverse mode and on the modification of the PAT impeller geometry will be presented, together with the speed necessary to obtain the match between the required design parameters and the PAT working conditions.