TIDAL POWER Generation of Electricity Using Tidal Energy Presented by : *Nishant Kumar Reg. No. 0701209350 Electrical & Electronics Engineering Silicon institute of technology , Bhubaneswar
IntroductionTidal barrageElectricity GenerationPumpingAdvantages and DisadvantagesConclusion
Why do the tides come and go ?It is all to do with the gravitational force of the Moon and Sun, and also the rotation of the EarthThe gravitational force of the moon causes the oceans to bulge along an axis pointing directly at the moon. The magnitude of this attraction depends on the mass of the object and its distance away
Spring TidesWhen the sun and moon are in a line their gravitational attraction on the earth combine and cause a spring tides
Neap TidesWhen they are as positioned in 90 from each other, their gravitational attraction each pulls water in different directions, causing a neap tides
TIDAL BARRAGEBarrage is built across an estuary or bay that experiences an adequate tidal rangeThe barrage blocks the incoming and out-going tides of a coastal basinThe water trapped within the basin creats a hydrostatic head
Generating SystemA dam (barrage) is built across the mouth of an estuary.Sluice gates allow incoming tides to fill the basin.As the tide ebbs, the water is forced through a turbine system to generate electricity.
Different Types of Generating SystemBulb Turbine System
Rim Turbine System
Oscillating water column System
Bulb Turbine SystemA bulb turbine is one in which water flows around the turbine
Rim Turbine SystemThe generator is mounted at right angles to the turbine blades, making access easier
Oscillating water column SystemIncoming waves force air up column to turn the turbineOutgoing waves suck air down column to turn the turbine
The turbines in the barrage can be used to pump extra water into the basin at periods of low demand, generally at night when demand is low, extra water is pumped in and then power is generated at times of high demand
Tidal Power in IndiaGulf of Cambay (7000 MW )Gulf of Kutch (1200 MW ) The techno-economic feasibility report is now being examined
ADVANTAGES * Once you've built it, tidal power is free It produces no green-house gases or other waste It needs no fuel Not expensive to maintain Permits the simultaneous use of the dam for a road or rail road
Provides a non-polluting and inexhaustible supply of energy
DISADAVANTAGESBuilding of barrage is expensive
Needs a wide area
Few suitable sites available
La Rance tidal power station ( 240 MW )
CONCLUSIONTidal power is a proven technology and has the potential to generate significant amounts of electricity at certain sites around the worldAlthough, our entire electricity needs could never be met by tidal power alone, it can be invaluable source of renewable energy
References:www.google.com (papers on Tidal power generation ).
IEEE papers on Tidal power in India.