Volume 37, Issue 7 pp. 1010-1019
Article

Experimental Investigation of Operating Parameters in Power Generation by Lab-Scale Reverse Electro-Dialysis (RED)

Insoo Choi

Insoo Choi

Fuel Cell Research Center, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea

Division of Energy Engineering, Kangwon National University, Samcheok 25913, Republic of Korea

These authors contributed equally to the paper.Search for more papers by this author
Jun Young Han

Jun Young Han

Fuel Cell Research Center, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea

These authors contributed equally to the paper.Search for more papers by this author
Sung Jong Yoo

Sung Jong Yoo

Fuel Cell Research Center, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea

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Dirk Henkensmeier

Dirk Henkensmeier

Fuel Cell Research Center, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea

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Jin Young Kim

Jin Young Kim

Fuel Cell Research Center, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea

Green School, Korea University, Seoul 02841, Republic of Korea

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So Young Lee

So Young Lee

Fuel Cell Research Center, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea

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Jonghee Han

Jonghee Han

Fuel Cell Research Center, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea

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Suk Woo Nam

Suk Woo Nam

Fuel Cell Research Center, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea

Green School, Korea University, Seoul 02841, Republic of Korea

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Hyoung-Juhn Kim

Corresponding Author

Hyoung-Juhn Kim

Fuel Cell Research Center, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea

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Jong Hyun Jang

Corresponding Author

Jong Hyun Jang

Fuel Cell Research Center, Korea Institute of Science and Technology (KIST), Seoul 02792, Republic of Korea

Green School, Korea University, Seoul 02841, Republic of Korea

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First published: 30 June 2016
Citations: 13

Abstract

The reverse electro-dialysis (RED) is a renewable technology to produce electricity by mixing of differently concentrated water. In this study, the authors fabricated lab-scale RED, and attempted to evaluate the RED performance upon different operating parameters. Firstly, the effect of salinity ratio on the RED performance was examined by varying the concentration of low-salinity water. The performance was optimized by an increase in open circuit voltage (OCV) and cell resistance with salinity ratio. Individual resistances were analyzed by electrochemical impedance spectroscopy, and their impacts on power output were addressed. Second, the effect of flow rate of salinity solutions was studied, and it was found to affect the concentration polarization in RED. Lastly, the effect of the flow rate of electrode rinse solution was investigated, which increased the ionic shortcut current and decreased boundary layer resistance accordingly. Consequently, estimations on the trends in power output by changing operating parameters were made to determine the effective operation of RED.

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