Limitations of osmotic gradient resource and hydraulic pressure on the efficiency of dual stage PRO process

Altaee, A; Zaragoza, G; Millar, GJ; Sharif, AO; Alanezi, AA

Limitations of osmotic gradient resource and hydraulic pressure on the efficiency of dual stage PRO process

Altaee, A

Zaragoza, G Millar, GJ Sharif, AO Alanezi, AA

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Publication Type:: Journal Article
Citation:: Desalination and Water Treatment, 2018, 105 pp. 11 - 22
Issue Date:: 2018-02-01

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Field	Value	Language
dc.contributor.author	Altaee, A https://orcid.org/0000-0001-9764-3974	en_US
dc.contributor.author	Zaragoza, G	en_US
dc.contributor.author	Millar, GJ	en_US
dc.contributor.author	Sharif, AO	en_US
dc.contributor.author	Alanezi, AA	en_US
dc.date.available	2020-05-25T19:03:00Z
dc.date.issued	2018-02-01	en_US
dc.identifier.citation	Desalination and Water Treatment, 2018, 105 pp. 11 - 22	en_US
dc.identifier.issn	1944-3994	en_US
dc.identifier.uri	http://hdl.handle.net/10453/132121
dc.description.abstract	© 2018 Desalination Publications. All rights reserved. A dual stage PRO process has been proposed for power generation from a salinity gradient across a semi-permeable membrane. Both closed-loop and open-loop dual stage PRO system were evaluated using 2 M NaCl and Dead Sea as draw solutions, whereas the feed solution was either fresh water or seawater. The impact of feed salinity gradient resource and feed pressure on the net power generation and water flux were evaluated. The results showed that power density in stage one reached a maximum amount at ΔP = p/2, but the maximum net power generation occurred at ΔP = p/2. This result was mainly attributed to the variation of net driving pressure in stage one and two of the PRO process. The dual stage PRO process was found to perform better at high osmotic pressure gradient across the PRO membrane, for example when Dead Sea brine or highly concentrated NaCl was the draw solution. Total power generation in the dual stage PRO process was up to 40% higher than that in the conventional PRO process. This outcome was achieved through harvesting the rest of the energy remaining in the diluted draw solution. Therefore, a dual stage PRO process has the potential of maximizing power generation from a salinity gradient resource.	en_US
dc.relation.ispartof	Desalination and Water Treatment	en_US
dc.relation.isbasedon	10.5004/dwt.2018.22128	en_US
dc.title	Limitations of osmotic gradient resource and hydraulic pressure on the efficiency of dual stage PRO process	en_US
dc.type	Journal Article
utslib.citation.volume	105	en_US
utslib.for	090404 Membrane and Separation Technologies	en_US
utslib.for	0904 Chemical Engineering	en_US
utslib.for	0905 Civil Engineering	en_US
utslib.for	0907 Environmental Engineering	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
pubs.organisational-group	/University of Technology Sydney/Strength - CTWW - Centre for Technology in Water and Wastewater Treatment
utslib.copyright.status	open_access
pubs.publication-status	Published	en_US
pubs.volume	105	en_US

Abstract:

© 2018 Desalination Publications. All rights reserved. A dual stage PRO process has been proposed for power generation from a salinity gradient across a semi-permeable membrane. Both closed-loop and open-loop dual stage PRO system were evaluated using 2 M NaCl and Dead Sea as draw solutions, whereas the feed solution was either fresh water or seawater. The impact of feed salinity gradient resource and feed pressure on the net power generation and water flux were evaluated. The results showed that power density in stage one reached a maximum amount at ΔP = p/2, but the maximum net power generation occurred at ΔP = p/2. This result was mainly attributed to the variation of net driving pressure in stage one and two of the PRO process. The dual stage PRO process was found to perform better at high osmotic pressure gradient across the PRO membrane, for example when Dead Sea brine or highly concentrated NaCl was the draw solution. Total power generation in the dual stage PRO process was up to 40% higher than that in the conventional PRO process. This outcome was achieved through harvesting the rest of the energy remaining in the diluted draw solution. Therefore, a dual stage PRO process has the potential of maximizing power generation from a salinity gradient resource.

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http://hdl.handle.net/10453/132121