This document discusses blue energy, also known as reverse electro-dialysis, which is an emerging renewable energy source that uses the difference in salt concentration between salt water and fresh water to generate electricity. It explains the processes of reverse osmosis and reverse electro-dialysis to produce energy. Parameters from an existing blue energy plant in the Netherlands are provided, showing it can generate 250kW of power. Advantages include being renewable, pollution-free, and able to generate power continuously. Disadvantages include high initial costs and maintaining membranes. The future prospects of blue energy reducing costs and providing 40% of worldwide energy demand are mentioned.

1. Blue Energy
The Renewable Source
Prepared By
Ruchir Oza(08EE030)
LDRP-ITR
Mayur Parekh(08BEE031)
NIRMA UNIVERSITY

2. Flow Of The Presentation
 Blue Energy
 Reverse Osmosis
 Reverse Electro-Dialysis
 Advantages And Disadvantages
 Future Prospects

3. Blue Energy
 Energy available from the difference in
the salt concentration between sea
water and river water.
 It is also known as “Reverse Electro-
Dialysis” (RED).

4. Reverse Osmosis

5. Reverse Electro-Dialysis

6. Dissociation of NaCl

7. Reverse Electro-Dialysis

8. Analogy With Electrical Circuit
LOAD
ANODE CATHOE
+
E
_
I

9. A Unit Containing Membranes

10. Units in Series

11. Courtesy : www.climatetechwiki.org

12. Parameters
 Energy Produced = 250kW
(It can go up to 4.5 GW)
 Size Of The Plant = 90 meter square
 Working Pressure = 11 – 15 bar
 Water quantity required per second on average = 3300
cubic meter
THE DATA IS DERIVED FROM THE RUNNING PLANT IN THE NETHERLANDS

13. River Delta
 The River Delta is a place where a river and an
ocean or a sea meets.
 Example of such ‘River Deltas’ are
(i) Rhine River Delta in the Netherlands
(ii) Sundarban in India

14. Courtesy : www.forumgarden.com

15. Courtesy : Encyclopedia Britannica

16. Comparison With
Other Renewable Sources
Parameters Solar Energy Wind Energy Blue Energy
Continuity of
power
Discontinuous Discontinuous Continuous
Cost High High Low
Energy Generation Low Low High

17. Advantages
 Renewable source of energy
 Efficiency found to be 85 to 90%
 Energy can be got 24 hours continuously
 Almost Pollution free technique
 Large availability of ‘river-deltas’ in the world

18. Disadvantages
 Salinity fluctuation
 Initial high cost of membranes and construction
 Conversion of DC to AC
 Maintenance of membranes

19. Future Prospects
 The project is under research and efforts are
being put to reduce the cost of the
membrane.
 Researchers have estimated that it can render
to 40% of the world wide demand.

20. References
 Ross, R., and Krijgsman, J. “New Ionomer Membranes for
Blue Energy”, an IEEE Paper
 http://en.wikipedia.org/wiki/BlueEnergy
 http://en.wikipedia.org/wiki/Reverse_osmosis
 http://powerplants.einnews.com/netherlands/
 Dr. Mark Krinker, and Professor Aron Goykadosh “Renewable
and Sustainable Energy Replacement Sources”
 http://www.odemagazine.com/doc/61/blue-energy/
 http://www.bluenergy.com/Ecological.htm
 http://www.sciencedirect.com/
 http://en.wikipedia.org/wiki/River_delta/
 http://en.wikipedia.org/wiki/BlueEnergy/
 http://www.elsevier.com/