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Influence of osmotic energy recovery/osmotic dilution on seawater desalination energy demand

Marjolein Vanoppen UGent, Sebastiaan Derese UGent, Annelise Bakelants and Arne Verliefde UGent (2013) IWA BeNeLux Regional Young Water Professionals Conference, 3rd, Papers.
abstract
Supplying fresh, potable water to an ever increasing world population is becoming a major challenge. One possibility is to produce fresh water from seawater by Reverse Osmosis (RO), a process that is very energy intensive. To reduce the energy demand of this process, osmotic dilution (OD)/osmotic energy recovery (OER) systems can be used as pre-treatment. Both Reverse Electrodialysis (RED) and Pressure Retarded Osmosis (PRO) and their non energy-producing counterparts short-circuited RED/ Forward Osmosis (scRED/FO) and assisted RED/FO (ARED/AFO) were modelled as OD/OER devices for RO, in a thermodynamic way. Different mixing ratios of impaired versus salt water (0.5, 1 and 2) were compared at a realistic RO recovery of 50%. A realistic approach for the RED/PRO-RO hybrid process was also modelled incorporating some major losses, to gain a more realistic insight into its possibilities. The thermodynamic modelling revealed that a significant reduction of the SEC is possible with all hybrid processes. The reduction in SEC is less for the non energy-producing systems, but these have the added advantage of requiring a lower membrane area to achieve a similar extent of seawater dilution. From preliminary results of the more realistic modelling, it seems that RED-RO scores better when losses are incorporated. Further thermodynamic and realistic modelling will focus on different RO recoveries, capital cost calculations based on membrane requirements and sensitivity analysis of the different parameters implemented.
Please use this url to cite or link to this publication:
author
organization
year
type
conference (meetingAbstract)
publication status
published
subject
keyword
Osmotic Dilution, Osmotic Energy Recovery, Pressure Retarded Osmosis, Reverse Electrodialysis, Reverse Osmosis, Desalination
in
IWA BeNeLux Regional Young Water Professionals Conference, 3rd, Papers
pages
9 pages
publisher
International Water Association (IWA)
conference name
3rd IWA BeNeLux Regional Young Water Professionals Conference
conference location
Belval, GD Luxembourg
conference start
2013-10-02
conference end
2013-10-04
language
English
UGent publication?
yes
classification
C1
copyright statement
I have transferred the copyright for this publication to the publisher
id
5781209
handle
http://hdl.handle.net/1854/LU-5781209
date created
2014-12-12 09:11:15
date last changed
2018-05-18 13:00:16
@inproceedings{5781209,
  abstract     = {Supplying fresh, potable water to an ever increasing world population is becoming a major challenge. One possibility is to produce fresh water from seawater by Reverse Osmosis (RO), a process that is very energy intensive. To reduce the energy demand of this process, osmotic dilution (OD)/osmotic energy recovery (OER) systems can be used as pre-treatment. Both Reverse Electrodialysis (RED) and Pressure Retarded Osmosis (PRO) and their non energy-producing counterparts short-circuited RED/ Forward Osmosis (scRED/FO) and assisted RED/FO (ARED/AFO) were modelled as OD/OER devices for RO, in a thermodynamic way. Different mixing ratios of impaired versus salt water (0.5, 1 and 2) were compared at a realistic RO recovery of 50\%. A realistic approach for the RED/PRO-RO hybrid process was also modelled incorporating some major losses, to gain a more realistic insight into its possibilities. The thermodynamic modelling revealed that a significant reduction of the SEC is possible with all hybrid processes. The reduction in SEC is less for the non energy-producing systems, but these have the added advantage of requiring a lower membrane area to achieve a similar extent of seawater dilution. From preliminary results of the more realistic modelling, it seems that RED-RO scores better when losses are incorporated. Further thermodynamic and realistic modelling will focus on different RO recoveries, capital cost calculations based on membrane requirements and sensitivity analysis of the different parameters implemented.},
  author       = {Vanoppen, Marjolein and Derese, Sebastiaan and Bakelants, Annelise and Verliefde, Arne},
  booktitle    = {IWA BeNeLux Regional Young Water Professionals Conference, 3rd, Papers},
  keyword      = {Osmotic Dilution,Osmotic Energy Recovery,Pressure Retarded Osmosis,Reverse Electrodialysis,Reverse Osmosis,Desalination},
  language     = {eng},
  location     = {Belval, GD Luxembourg},
  pages        = {9},
  publisher    = {International Water Association (IWA)},
  title        = {Influence of osmotic energy recovery/osmotic dilution on seawater desalination energy demand},
  year         = {2013},
}

Chicago
Vanoppen, Marjolein, Sebastiaan Derese, Annelise Bakelants, and Arne Verliefde. 2013. “Influence of Osmotic Energy Recovery/osmotic Dilution on Seawater Desalination Energy Demand.” In IWA BeNeLux Regional Young Water Professionals Conference, 3rd, Papers. International Water Association (IWA).
APA
Vanoppen, M., Derese, S., Bakelants, A., & Verliefde, A. (2013). Influence of osmotic energy recovery/osmotic dilution on seawater desalination energy demand. IWA BeNeLux Regional Young Water Professionals Conference, 3rd, Papers. Presented at the 3rd IWA BeNeLux Regional Young Water Professionals Conference, International Water Association (IWA).
Vancouver
1.
Vanoppen M, Derese S, Bakelants A, Verliefde A. Influence of osmotic energy recovery/osmotic dilution on seawater desalination energy demand. IWA BeNeLux Regional Young Water Professionals Conference, 3rd, Papers. International Water Association (IWA); 2013.
MLA
Vanoppen, Marjolein, Sebastiaan Derese, Annelise Bakelants, et al. “Influence of Osmotic Energy Recovery/osmotic Dilution on Seawater Desalination Energy Demand.” IWA BeNeLux Regional Young Water Professionals Conference, 3rd, Papers. International Water Association (IWA), 2013. Print.