Redesign of energy recovery device to keep the production recovery constant

Document Type : Research Article

Author

Payame Noor University - Faculty of Engineering

Abstract

One of the problems of producing fresh water by reverse osmosis is its sensitivity to process conditions. In this article, a method for redesigning the hydraulic turbocharger rotor as an energy Recovery device in desalination units has been discussed. For this purpose, firstly, the performance of a desalination unit in operation is investigated. Then, using turbomachinery similarity relations and CFD, two new rotors have been designed for two high- and low-pressure modes and replaced with the primary rotor. The validated results with the test show that despite changing membrane inlet pressure, the amount of produced water was not changed, the total efficiency has increased by more than 4% and the energy recovery has increased by about 2% in the high-pressure mode, which shows that this method can be used in situations where the pressure change of the membranes is noticeably higher or lower than the initial design pressure.

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References

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Amirkabir Journal of Mechanical Engineering
Volume 56, Issue 5
2024
Pages 651-678

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