Every year, around 300 million m3 of seawater is desalinated & lots of researches are involved in the same domain. Various methods & techniques were invented to rise up the level of water purity. One of the largest used techniques in this domain is the Reverse Osmosis, which is a simulation to the natural phenomena called Osmosis that depends on high pressure pumping of the conducted seawater to the RO modules, in order to desalinate the water from salt. However, obstacles were always facing researchers during the realization & also preventing the dispositive from damage while facing the immense seawater pressure (50 to 62 bars). But the worst obstacle is corrosion problem! Due to the high salt concentration in the seawater, what did extend the challenge to find more solutions to increase the yield & decrease the energy consumption with assuring a long-life for desalination dispositive. In 1992, Energy Recovery, Inc.(ERI) was established and manufactured ultra-high efficiency recovery products and technology, specifically the ERI Pressure Exchanger (PX) that is among the enabling technologies driving the rapid growth in seawater reverse osmosis (SWRO) using the alumina Al2O3 , known with a thick oxide layer that protects the metal from oxidation. For the first time, a predicted design of the ERI pressure exchanger’s geometry was built, analyzed & verified with a numerical simulation to show the long life time of the ERI PX (up to 20 years & more) & explain the strength, high pressure & corrosion resistance of its forming materials.Keywords: Pressure Exchanger, Corrosion resistance, Seawater desalination
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