Estimation of salinity power potential in India

V.K. Das, D.V. Ramaraju


Salinity gradient as a source of energy has much potential, but this has been recognized only recently. The energy density of this source is equivalent to about 250 m water head for a salinity difference of 35 ppt. This source exists at the estuaries where freshwater flows into the sea or wherever sources of different salinities exist. In India, the total freshwater discharge from rivers and streams flowing into the seas around amounts to about 23 x 103 m3/sec which could provide a power potential of about 54.8 x 103 MW. Additional sources are done available in the form of salt deposits or salt pans. Only very little work has been on the techniques of extraction of power from salinity gradient


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