2. Renewable energy
Natural resources
These sources are considered renewable because they quickly replenish
themselves
are usually available in a never-
ending supply.
3. Tipes of renewable energy sourcing *
* Some
solar
wind
water.
waves
tides
biomassEarth heat
4. Solar energy
The sun has produced energy for billions of year
Solar energy is the sun's rays (solar radiation) that reach the earth
This energy can be converted into heat and electricity.
5. Wind energy
The unequal heating of the earth by the sun creates wind
Wind can be harnessed to create electricity by
using turbines.
generator
tail
rotator
Made up
of
. As the blades spin they are connected to the generator and creates electricity
The electricity travels to a power inverted box
home
Power grid
6. Hydro energy
Hydropower is the most significant renewable
energy source.
Most hydro electricity is created by water run off that collects
Inside a structure called a powerhouse,
the runoff turns a turbine and creates energy
Then
The water is returned
streams
rivers
lakes
7. Hydro energy : waves Hydro energy: tides
There are several methods of getting these energy
advantanges:
no fuel needed, no waste produced.
Not expensive to operate and maintain.
Can produce a great deal of energy.
Disadvantages
Depends on the waves sometimes you'll get loads of energy,
sometimes almost nothing.
Needs a suitable site, where waves are consistently strong.
Some designs are noisy.
Must be able to withstand very rough weather.
lot of energy in waves on the sea
The hard part is getting it
Waves can make something bob up and down, and that can
drive a generator
tidal energy is a form of hydropower that converts the energy of
the tides into electricity
The tide is created by the gravitational effect of the sun and the
moon
Tidal energy is therefore an entirely predictable form of
renewable energy,
which can be harnessed in two forms:
tidal Range
Tidal Stream
• tidal power belongs to renewable energy sources
• The efficiency of tidal power + 80%
• Tidal power plants cost a lot
• Tidal power is intermittent source of energy that can only
produce electricity around 10 hours each day
advantages
Disadvantages
BUT
8. biomass
is biological material derived from living, or recently living organisms.
In the context of biomass for energy this is often used to mean plant based material
but
biomass can equally apply to both animal and vegetable derived material.
1. The waste wood, tree branches and other scraps are gathered together in big trucks.
2. The trucks bring the waste from factories and from farms to a biomass power plant.
3. then it is dumped into huge hoppers.
4. This is then fed into a furnace where it is burned.
5. The heat is used to boil water in the boiler, and the energy in the steam is used to turn turbines and generators
How it is maded?
9. Earth heat
Geothermal energy has been used for thousands of years in some countries for cooking and heating.
It is simply power derived from the Earth's internal heat. This thermal energy is contained in the rock and fluids beneath Earth's
crust.
It can be found from shallow ground to several miles below the surface, and even farther down to the extremely hot molten
rock called magma.
