Transcript solar energy - EngTech

Engineering
Technology…
Team member:
1) Ayra Umayrah
2) Ahlam Awateef
3) Waseem Akram
4) Ameerul Ahwaz
4 MODEM
THE PRODUCTION OF
ELECTRICAL ENERGY
o The sun is another main source of energy on
earth.
o It is believed that the sun temperature is
about 15 million Kelvin.
o SOLAR RADIATION
The released energy makes its way to the
sun’s surface (photosphere) and then to outer
space in the form of electromagnetic
radiation (electric wave and magnetic field).
o Electricity is generated when solar radiation
is directed to a voltaic photocell.
o The electrical energy is limited and small in
quantity depending on the amount of
radiation.
o Electricity cannot be obtained in the dark.
o Solar energy is used, e.g , in calculators and
watches.
o Bigger electricity generation systems that
use solar panels to collect heat by heating
liquid in the panel tubes.
o Liquid will turn into high pressure steam.
o The steam is then conveyed to the turbine to
turn the generator, thus generating
electricity.
o Batteries are installed into the system to
retain the electrical energy when there is no
solar (at night).
o Batteries are only functional in the absence
of the sun.
o All the control processes are made automatic.
o Usually, solar panel are installed on rooftops.
o Solar energy can also be used to supply hot
water in a building.
o Hot water produced is collected in a special
tank and is released when required.
ELECTRICAL POWER
STATION
TYPE OF
STATION
SOLAR
LOCATION
ADVANTAGES
DISADVANTAGES
• Any place
where there
is sunlight.
• Very
appropriate
for remote
areas.
• Free source of
energy.
• Energy is
renewable.
• No pollution.
• Equipment to
convert energy is
expensive.
• Energy depends on
the sunlight.