INCREASED SUMP CAPACITY - A MODEL STUDY.

Increasing pump sump capacity by mere addition of more pumps is limited by the generation of vortices. In most cases the costs for changing sump dimensions to increase capacity are prohibitive. In a sump model for which three pumps would satisfy the Hydraulic Institute Standards, three arrangements were tested with five pumps to determine their acceptance for the increased load. These arrangements were the echelon, the inverted 'Vee', and the upright 'Vee' as shown in the paper.