Pelton wheel efficiency curve

Pelton wheels have been modified and improved specifically to optimize them for use with SWRO systems. This innovation has resulted in efficiency and other improvements, and Pelton wheels continue to be used with SWRO systems today. Current Pelton wheel devices have overall net transfer efficiencies of 60-88% (Villa Sallangos, 2004). Figure 4.3 is a typical Pelton wheel efficiency curve and shows the device efficiency at 80%. Optimally, a Pelton wheel can teach 88% efficiency, but this efficiency must be multiplied by the SWRO pumping device it is connected to in order to produce the overall net transfer efficiency. For example, an 85% efficient Pelton wheel operating with an 82% efficient SWRO pump would have an overall net transfer efficiency of the reject hydraulic flow to the feed water hydraulic flow of approximately 70%. 

Figure 4.3 Typical Pelton wheel efficiency curve. (From Stover, 2006, p. 23.)...

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