A comparative study on the reducing flow rate design method for a desalination energy recovery pump as turbine

The energy recovery and utilization of high-pressure brine are the key to reduce cost. Reducing flow rate method (RFM) was put forward firstly adapt pump as turbine (PAT) a wide range operating conditions in this paper. In order validate advantages new method, three different designs PAT were obtained, respectively, based on methods, which were, selection design curved RFM. Based numerical external characteristics, axial force internal patterns PATs analyzed. Results show that matching blade inlet angle at leading edge has great influence directly related efficiency PAT. A designed by RFM improves both hydraulic shaft power under partial load conditions. Moreover, is reduced, can improve reliability operation with high rotating speed.