패턴형 이온교환막을 이용한 스택의 셀 수 및 크기에 따른 역전기투석 성능 평가
Evaluation of Reverse Electrodialysis based on the Number of Cell Pairs and Stack Size Using Patterned Ion Exchange Membrane
2
조회
0
다운로드
0
인용
0
참고문헌
키워드
초록
Salinity gradient energy can be generated from a mixture of water streams with different salt concentrations by usingreverse electrodialysis (RED). In this study, we evaluated the effect of stack size and number of cell pairs on the energy efficiency andspecific energy of the RED process. Additionally, we studied the prementioned parameters to maximize the power density of RED. The performance of the RED stack which used a patterned ion exchange membrane, was evaluated as a function of stack size and feedflow rate. Moreover, it was noted that an increase in stack size increased the ion movement through the ion exchange membrane. Furthermore, an increase in feed flow rate led to a reduction in the concentration variation, resulting in an increase in OCV and powerdensity. The energy efficiency and specific energy for 100 cells in the 10 × 10 cm2 stack were the highest at 12% and 0.05 kWh/m3,respectively, while the power density from 0.33 cm/s to 5 × 5 cm2 stack was the highest at 0.53 W/m2. The study showed that the REDperformance can be improved by altering the size of the stack and the number of cell pairs, thereby positively affecting energyefficiency and specific energy.
Abstract
Salinity gradient energy can be generated from a mixture of water streams with different salt concentrations by usingreverse electrodialysis (RED). In this study, we evaluated the effect of stack size and number of cell pairs on the energy efficiency andspecific energy of the RED process. Additionally, we studied the prementioned parameters to maximize the power density of RED. The performance of the RED stack which used a patterned ion exchange membrane, was evaluated as a function of stack size and feedflow rate. Moreover, it was noted that an increase in stack size increased the ion movement through the ion exchange membrane. Furthermore, an increase in feed flow rate led to a reduction in the concentration variation, resulting in an increase in OCV and powerdensity. The energy efficiency and specific energy for 100 cells in the 10 × 10 cm2 stack were the highest at 12% and 0.05 kWh/m3,respectively, while the power density from 0.33 cm/s to 5 × 5 cm2 stack was the highest at 0.53 W/m2. The study showed that the REDperformance can be improved by altering the size of the stack and the number of cell pairs, thereby positively affecting energyefficiency and specific energy.
참고문헌 (19)
- Sharma, R. C., "Energy from the Ocean and Scope of its Utilization in India", International Journal of Environmental Engineering and Management, 4(4), pp.397~404 (2013)
- Micale, G., "Sustainable Energy from Salinity Gradients", pp.1~17 (2016), Elsevier
- Yang, S. C., "R2R fabrication of pore-filling cation-exchange membranes via one-time impregnation and their application in reverse electrodialysis", ACS Sustainable Chem. Eng, 7(14), pp.12200~12213 (2019)
- Kim, H. K., "High power density of reverse electrodialysis with pore-filling ion exchange membranes and a high-open-area spacer", J. Mater. Chem. A, 3(31), pp.16302~16306 (2015)
- Post, J. W., "Energy recovery from controlled mixing salt and fresh water with a reverse electrodialysis system", Environ. Sci. Technol, 42(15), pp.5785~5790 (2008)
- Mehdizadeh, S., "Effect of spacer geometry on membrane and solution compartment resistances in reverse electrodialysis", J. Membr. Sci, 572, pp.271~280 (2019)
- Vermaas, A. D., "Power generation using profiled membranes in reverse electrodialysis", J. Membr. Sci, 385, pp.234~242 (2011)
- Pawlowski, S., "Improved fluid mixing and power density in reverse electrodialysis stacks with chevron-profiled membranes", J. Membr. Sci, 531, pp.111~121 (2017)
- Choi, J. Y., "Ultra-thin pore-filling membranes with mirror-image wave patterns for improved power density and reduced pressure drops in stacks of reverse electrodialysis", J. Membr. Sci, 620, pp.118885~ (2021)
- Kim, H. K., "Optimization of the number of cell pairs to design efficient reverse electrodialysis stack", Desalination, 497, pp.114676~ (2021)
- Nam, J. Y., "Enhanced energy recovery using a cascaded reverse electrodialysis stack for salinity gradient power generation", Water Research, 200, pp.117255~ (2021)
- Pawlowski, S., "Mass transfer in reverse electrodialysis : Flow entrance effects and diffusion boundary layer thickness", J. Membr. Sci, 471, pp.72~83 (2014)
- Luo, X., "Power generation by coupling reverse electrodialysis and ammonium bicarbonate : Implication for recovery of waste heat", Electrochem. commun, 19, pp.25~28 (2012)
- Hulme, A. M., "Scale-up of reverse electrodialysis for energy generation from high concentration salinity gradients", J. Membr. Sci, 627, pp.119245~ (2021)
- Yip, N. Y., "Thermodynamic, energy efficiency, and power density analysis of reverse electrodialysis power generation with natural salinity gradients", Environ. Sci. Technol, 48(9), pp.4925~4936 (2014)
- 나종찬, "RED 전력밀도에 미치는 해수", 담수 유량의 영향, 2014, pp.36(9), 624~628[DOI]
- Veerman, J., "Reverse electrodialysis:Comparison of six commercial membrane pairs on the thermodynamic efficiency and power density", J. Membr. Sci, 343(1-2), pp.7~15 (2009)
- Veerman, J., "Electrical power from sea and river water by reverse electrodialysis : a first step from the laboratory to a real power plant", Environ. Sci. Technol, 44(23), pp.9207~9212 (2010)
- Moreno, J., "Upscaling reverse electrodialysis", Environ. Sci. Technol, 52(18), pp.10856~10863 (2018)