Journal article
Exergy Analysis-Potential of Salinity Gradient Energy Source
- Emdadi, Arash Energy Center, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, 1015, Switzerland e-mail:
- Zenouzi, Mansour Fellow ASME Department of Mechanical Engineering & Technology, Wentworth Institute of Technology, Boston, MA 02115 e-mail:
- Lak, Amir Mechanical Engineering Department, Gazi University, Anakra 06560, Turkey e-mail:
- Panahirad, Behzad Mechanical Engineering Department, Eastern Mediterranean University, Famagusta 10, Northern Cyprus, Cyprus e-mail:
- Emami, Yunus Mechanical Engineering Department, Urmia University of Technology, Urmia 57166-17165, West Azerbaijan, Iran e-mail:
- Lak, Farshad Mechanical Engineering Department, Urmia University of Technology, Urmia 57166-17165, West Azerbaijan, Iran e-mail:
- Kowalski, Gregory J. Fellow ASME Mechanical and Industrial Engineering Department, Northeastern University, Boston, MA 02115 e-mail:
- 2018-2-15
Published in:
- Journal of Energy Resources Technology. - ASME International. - 2018, vol. 140, no. 7
Fuel Technology
Mechanical Engineering
Renewable Energy, Sustainability and the Environment
Energy Engineering and Power Technology
Geochemistry and Petrology
English
Mixing of fresh (river) water and salty water (seawater or saline brine) in a controlled environment produces an electrical energy known as salinity gradient energy (SGE). Two main conversion technologies of SGE are membrane-based processes: pressure retarded osmosis (PRO) and reverse electrodialysis (RED). Exergy calculations for a representative river-lake system are investigated using available data in the literature between 2000 and 2008 as a case study. An exergy analysis of an SGE system of sea-river is applied to calculate the maximum potential power for electricity generation. Seawater is taken as reference environment (global dead state) for calculating the exergy of fresh water since the sea is the final reservoir. Aqueous sodium chloride solution model is used to calculate the thermodynamic properties of seawater. This model does not consider seawater as an ideal solution and provides accurate thermodynamics properties of sodium chloride solution. The chemical exergy analysis considers sodium chloride (NaCl) as main salt in the water of this highly saline Lake with concentration of more than 200 g/L. The potential power of this system is between 150 and 329 MW depending on discharge of river and salinity gradient between the Lake and the River based on the exergy results. This result indicates a high potential for constructing power plant for SGE conversion. Semipermeable membranes with lifetime greater than 10 years and power density higher than 5 W/m2 would lead to faster development of this conversion technology.
- Language
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- English
- Open access status
- closed
- Identifiers
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- DOI 10.1115/1.4038964
- ISSN 0195-0738
- Persistent URL
- https://sonar.ch/global/documents/230860
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