Integrated Pressure and Flow Control in SWRO with a HEMI Turbo Booster

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Integrated Pressure and Flow Control in SWRO with a HEMI Turbo Booster

The high pressure hydraulic energy management integration (HP-HEMI) energy recovery device (ERD) centralizes brine hydraulic energy recovery, feed pressure and flow control and brine pressure and flow control into one compact and fully integrated unit. The objective is to dispense with feed pressure control valves (i.e. elimination of throttling losses) as well as a variable frequency drive (VFD) on the high pressure feed pump (HPP) resulting in the twin benefits of a substantial reduction in energy consumption and capital costs. This paper reports on test results of a production HP-HEMI coping with recoveries and pressures that accurately simulate an SWRO system dealing with typical feed temperature and membrane fouling variations.

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