Tidal Energy Video Lecture - Class 10

tidal power tidal power is a form of
hydropower that converts the energy from
the natural rise and fall of the tides
into electricity tides are caused by the
combined effects of gravitational forces
exerted by the moon the Sun and the
rotation of the earth
tidal plants can only be installed along
coastlines coastlines often experience
two high tides and two low tides on a
daily basis the difference in water
levels must be at least five meters high
to produce electricity
tidal electricity can be created from
several technologies the main ones being
tidal barrages tidal fences and tidal
turbines tidal barrages are the most
efficient tidal energy sources a tidal
barrage is a dam that utilizes the
potential energy generated by the change
in height between high and low tides
this energy turns a turbine or
compresses air which in turn creates
electricity tidal fences are turbines
that operate like giant turnstiles
whereas tidal turbines are similar to
wind turbines only under water in both
cases electricity is generated when the
mechanical energy of tidal currents
turns turbines connected to a generator
the generator produces electricity ocean
currents generate relatively more energy
than air currents because ocean water is
832 times more dense than air and
therefore applies greater force on the
turbines tidal power is easy to install
and renewable having no direct
greenhouse gas emissions and a low
environmental impact because the oceans
tidal patterns are well understood tidal
energy is a very predictable energy
source making it highly attractive for
electrical grid management this sets it
apart from other renewables that can be
more unpredictable
however adoption of tidal technologies
has been slow and so far the amount of
power generated using tidal power plants
is very small
this is due largely to the very specific
site requirements necessary to produce
title electricity
additionally tide cycles do not always
match the daily consumption patterns of
electricity and therefore do not provide
sufficient capacity to satisfy demand
that's tidal power