Application Economics of the Variable Speed

This paper discusses the techniques used to size available submersible pumping equipment to pump in a variable speed, constant head mode. Effects of variable speed, constant head operation on the pump and motor are described with their relation to optimum system performance. Energy-usage calculations for a conventional, constant-speed submersible pump and a variable-speed, constant-head submersible pump are compared. Finally, the economics of the variable speed submersible system are analyzed.