Experimental study of thermal gradient effect on reverse osmosis process

Document Type : Research Article

Authors

Department of Mechanical Engineering, Faculty of Engineering, University of Hormozgan, Bandar Abbas, Iran

Abstract

In the present work, an experimental study of the thermal gradient effect on the reverse osmosis process is performed to evaluate pure water penetration and water production under the effect of the temperature gradients and the salt concentration. The experimental study uses a novel experimental setup designed and built for the present work. The DOW Filmtec RO membrane, SW30HR, was used in the experimental setup. The results showed that, this process is dependent on salt concentration and temperature gradient between permeate-water and saline-water side. It is observed that in 10.8oC temperature difference between the permeate-water and the saline-water part for 1 gr/lit salt concentration at saline-water part, the Process time is 20 min, water flux is 0.142kg/(m^2 s) and salt concentration in saline-water part varies from 1.04 gr/lit to 1.22 gr/lit. In addition, for 1.5oC temperature difference between permeate-water part and the saline-water part for 1 gr/lit salt concentration at saline-water part, the Process time is 35 min, water flux is 0.043kg/(m^2 s) and salt concentration in saline-water part varies from 1.004 gr/lit to 1.059gr/lit. It can be concluded, while temperature gradient increases, the Process time decreases, and pure water penetration from saline-water to permeate-water part also increases. As a result, the salt concentration and electrical conductivity can increase in the saline-water part.

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AUT Journal of Mechanical Engineering
Volume 8, Issue 2
June 2024
Pages 2-2

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