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J Korean Soc Environ Eng > Volume 38(9); 2016 > Article
J Korean Soc Environ Eng 2016;38(9): 476-481. doi: https://doi.org/10.4491/KSEE.2016.38.9.476
나권형 모듈을 이용한 압력지연삼투 공정의 에너지생산에 관한 연구
고길현1, 박태신2, 강임석1
1부경대학교 환경공학과
2GS건설
Assessment of Power Generation by Pressure Retarded Osmosis Process from Spiral-Wound Membrane Pilot-Plant
Gil hyun Go1, Tae shin Park2, Lim seok Kang1
1Department of Environmental Engineering, Pukyong National University
2GS E&C
Corresponding author  Lim seok Kang ,Tel: 051-629-6527, Fax: 051-629-6523, Email: kangls@pknu.ac.kr
Received: January 18, 2016;  Revised: February 4, 2016;  Accepted: August 15, 2016.  Published online: September 30, 2016.
ABSTRACT
Pressure retarded osmosis (PRO) is a quite new technique for power generation using an osmotically driven membrane process. In the PRO process, water permeates through a semipermeable membrane from a low concentration feed solution to a high concentration draw solution due to osmotic pressure. This study carried out to evaluate the performance of the 8 in spiral wound membrane module using reverse osmosis concentrate for a draw solution and reverse osmosis permeate for a feed solution. Three different flowrates of draw and feed solution, such as 2.4 L/min, 5.0 L/min, and 10.0 L/min were used to estimate the power density and water flux under various range of hydraulic pressure differences between 5 bar and 30 bar. In addition, the effects of feed and draw solution concentration, flowrate, and mixing ratio on 8 in spiral wound PRO membrane module performance were investigated in this study. As major results, increases of the draw solution concentration lead to the improvement of power denstiy, and water flux. Also, increase of flowrate resulted in the improvement of power density and water flux. In addition, optimal mixing ratio of draw and feed solution inlet flowrate was found to be 1:1 to attain a maximum power denstiy.
Key Words: Pressure Retarded Osmosis, Water Flux, Power Density, Spiral Wound Module
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