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http://dx.doi.org/10.9713/kcer.2017.55.6.762

Study on the Necessity of Energy Recovery Device in Small Scale Reverse Osmosis Desalination Plant  

Jeon, Jongmin (Department of civil engineering, Pukyong National University)
Kwak, Kyungsup (Department of civil engineering, Pukyong National University)
Kim, Noori (Department of civil engineering, Pukyong National University)
Jung, Jaehak (Department of civil engineering, Pukyong National University)
Son, Dong-Min (Krosys Incorporated)
Kim, Suhan (Department of civil engineering, Pukyong National University)
Publication Information
Korean Chemical Engineering Research / v.55, no.6, 2017 , pp. 762-766 More about this Journal
Abstract
Energy recovery device (ERD) is used to save energy consumption in seawater reverse osmosis processes. However, small-scale ERDs (<$100m^3/d$) are hardly observed in seawater desalination market. In South Korea, most of seawater desalination plants for drinking water production are small-scaled and have been operated in island areas or on ships. Thus, the effect of ERDs for these small-scale SWRO processes should not be neglected. In this work, the small-scale SWRO processes are designed and analyzed in terms of energy consumption with/without ERD. The realistic efficiencies of high pressure pumps are considered for the energy analyses. The unit cost of electricity depending on the application place (e.g., inland and island areas, on ships) is investigated to calculate the energy cost for unit water production in various SWRO applications classified by plant capacity, application place, and the installation of ERD. As a result, the energy cost can be saved up to $1,640.4KRW/m^3$ when ERD is applied, and the saving effect increases at smaller plants on ships. In conclusion, the development of small-scale ERDs are necessary because small-scale SWRO processes are dominant in Korean seawater desalination market, and the electricity saving effect becomes higher at smaller-scaled system.
Keywords
Seawater reverse osmosis (SWRO); Energy recovery device (ERD); Small-scale; Energy cost;
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Times Cited By KSCI : 1  (Citation Analysis)
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