Renewable energies their contribution for future plans What are their significance Why is it necessary

2. RENEWABLE ENERGY
 Renewable energy is generally defined as energy that
comes from resources which are naturally replenished
on a human timescale.
 Renewable energy —
wind, solar, geothermal, hydroelectric, and biomass —
provides substantial benefits for our climate, our health,
and our economy:
1. Little to No Global Warming Emissions
2. Improved Public Health and Environmental Quality
3. A Vast and Inexhaustible Energy Supply
4. Jobs and Other Economic Benefits
5. Stable Energy Prices
6. A More Reliable and Resilient Energy System

3. SOLAR ENRGY BY-PHOTO VOLTIC CELLS
 Solar power cells convert sunlight into electricity,
using the energy of speeding photons to create an
electrical current within a solar panel.
 Photons are created in the center of the sun by the
fusion of atoms. It takes a photon about a million
years to work its way to the surface of the sun, but
once free it is hurled through space so fast that it
reaches earth in just eight minutes - after traveling
93 million miles.

4.  Solar energy

5. HYDRO ENERGY
 Hydro-power or water power is power derived
from the energy of falling water and running water,
which may be harnessed for useful purposes.
 Since ancient times, hydro-power has been used
for irrigation and the operation of various
mechanical devices, such
as watermills,sawmills, textile mills, dock cranes,
domestic lifts, power houses and paint making.

6.  Hydro energy

7. WIND ENERGY
 Wind power is the conversion of wind energy into a
useful form of energy, such as using wind
turbines to produce electrical power,windmills for
mechanical power, windpumps for water
pumping or drainage, or sails to propel ships.
 Wind turbines operate on a simple principle. The
energy in the wind turns two or three propeller-like
blades around a rotor. The rotor is connected to the
main shaft, which spins a generator to create
electricity.

8.  Wind energy

9. GEOTHERMAL ENERGY
 Geothermal energy is thermal energy generated
and stored in the Earth. Thermal energy is the
energy that determines thetemperature of matter.
 The geothermal energy of the
Earth's crust originates from the original formation
of the planet (20%) and from radioactive decay of
minerals (80%).

10.  Geothermal energy

11. TIDAL ENERGY
 Tidal power, also called tidal energy, is a form
of hydropower that converts the energy of tides into
useful forms of power, mainly electricity.
 tidal power has potential for future electricity generation.
Tides are more predictable than wind energy andsolar
power.
 Tidal power traditionally involves erecting a dam across
the opening to a tidal basin. The dam includes a sluice
that is opened to allow the tide to flow into the basin; the
sluice is then closed, and as the sea level drops,
traditional hydropower technologies can be used to
generate electricity from the elevated water in the
basin.

12.  Tidal energy

13. USES OF SOLAR ENERGY
 The most obvious use of solar energy is to generate
electricity for your home. You can choose a full solar
electrical system and completely remove yourself from
the grid local power company
 Solar systems can heat the water in your home to fill
your hot-water tank. These tanks must be well-insulated
to maintain the hot water temperature once the sun
goes down.
 More cities are turning to solar-powered road signs to let
you know how fast you're going or to convey messages
of accidents ahead.
 Satellites that link us to most mass forms of media
directly or indirectly use the sun's rays to power them.

14. USES OF GEOTHERMAL ENERGY
 one of the uses of geothermal energy technologies
is to allow you in hot times to take heat from your
house, send it down pipes into the ground , and
return it to your house . The technology typically
uses a liquid like antifreeze as a carrier of that heat,
which is moved about in a closed-loop piping
system.
 Geothermal heating can help farmers keep
growing, all winter long. geothermal heat is used to
keep fish farms’ water temperatures warm, even
with glaciers all around.

15. USES OF TIDAL ENERGY
 Like other forms of Energy , the main usage of Tidal
Energy is in the generation of Electricity. Tidal
Energy is being used in France to generate 240
MW of Tidal Electricity at very low costs.
 Tidal Energy has been used for hundreds of years .
Just like Wind Mills , Tidal Energy was used for the
mechanical crushing of grains in Grain Mills . The
movement of Turbines due to Tidal Energy was
used in the crush Grains.
 Tidal Barrages can prevent Damage to the Coast
during High Storms and also provide an easy
transport method between the 2 arms of a Bay or
an Estuary on which it is built.

16. USES OF HYDRO POWER
 Hydroelectric energy is electricity and is put on the
national grid for use bythe public.
 it is used for pretty much every modern process of
anything, in someway or another.

17. USES OF WIND ENERGY
 it has been to travel the world
 manufacture products
 manufacture products

18. INNOVATIVE IDEAS FOR ENERGY PRODUCTION: A
COMPUTER-CONTROLLED KITE STRUCTURE
FLOATING AROUND 2000FT FOR GENERATING
POWER
 Joby Energy Inc., exploring wind turbine
technology, has developed a computer-controlled
multi-winged kite-like structure which floats around
2000ft height for generating power. Mr Bevirt is the
inventor of this aerial kite. The DC power generated
is transferred to ground through tether to a ground
station to be converted to AC power ready for
consumption via a power grid.
 Mr. Bevirt said, “Operating at five times the height
of a conventional turbine increases both wind
speed and consistency resulting in more power,
more often.”

19. INNOVATIVE IDEAS FOR ENERGY
PRODUCTION:ENGINNERS TAP ALGAE FOR
ELECTRICITY
 With the help of photosynthesis plants convert light
energy to chemical energy. This chemical energy is
stored in the bonds of sugars they use for food.
Photosynthesis happens inside a chloroplast.
Chloroplasts are considered as the cellular
powerhouses that make sugars and impart leaves and
algae a green hue. During photosynthesis water is split
into oxygen, protons and electrons. When sunrays fall
on the leaves and reach the chloroplast, electrons get
excited and attain higher energy level. These excited
electrons are caught by proteins. The electrons are
passed through a series of proteins.
 They intercepted the electrons just after they had been
excited by light and were at their highest energy levels.
They put the gold electrodes inside the chloroplasts of
algae cells, and tapped the electrons to create a tiny
electrical current.