Modifying the hydraulic turbocharger of the desalination unit using the reverse osmosis method according to the change in the process conditions

Document Type : Research Article

Author

Payame Noor University - Faculty of Engineering

Abstract

Today, the production of fresh water using reverse osmosis method is the affordable options in many countries. One of the problems of this method is the reduction of the amount of permeate water due to increase of salinity and temperature of raw water throughout the year. In this article, a method for redesigning the hydraulic turbocharger rotor has been discussed so that the amount of permeate water can be kept relatively constant without. For this purpose, firstly, the performance of a working plant was investigated, then using computational fluid dynamics and similarity relations in turbomachinery, two new rotors were designed and manufactured for the existing turbocharger to be used in two modes of high and low membrane pressure. To verify the validity, the design parameters have been compared with the test data. The results show that despite the change in the membrane, replacing new rotors The new rotor design has made the water production unchanged. The efficiency has also increased in one of the cases more than 4% and energy recovery about 2%. So, it can be concluded that this method can be used in seasons when the pressure change of the membranes is noticeably higher or lower than the initial design pressure.

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

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