It's a ppt on solar energy

1. SOLAR ENERGY
Presented by :
Farheen Saba N Gowthami D
Meenakshi D M
2nd sem ECE-B
Sai Vidya Institute of Technology
Learn to Lead….
Rajankunte , Bangalore

2. Introduction
 Solar energy is radiant light and heat from the
sun.
 Harnessed using range of technologies.
 Solar energy is the earth’s most available source of
energy.
 Solar energy generation is able of providing many
times our current energy demand.
 Solar power systems derive clean, pure energy
from the sun.

4. Main parts of flat plate collectors
Absorber plate
 Transparent cover
 Fluid tubes or channels
 Thermal insulation
 Tight container or box

5. Working
Either by gravity flow or forced circulation, water from the cold
water tank enters the solar tank and fills it up.
 The cold water from the solar tank in turns flows in the bottom
header pipe of the absorber and into the copper tubes, until all the
absorber tubes and the header at the top of the absorber are full.
 When the sun rises to a certain level, its energy which falls on
the absorber fins and tubes, begins heating the water contained
there in.
 The heated water being lighter than the cold water rises and via
the top header pipe of the absorber flows into the top of the solar
tank.

7. Advantages
 These systems use solar energy which is a free
and renewable source of energy.
 These systems have low maintenance costs.
 Relatively good payback period.

8. Disadvantages
 Payback times can vary greatly due to regional
sun.
 Relatively low efficiency of passive solar water
heating systems.
 They require excellent overheating and freeze
protection.

10. Definition
 Converts solar energy to electrical energy
 Photovoltaic effect
 Made up of doped silicon

11. Working
 Photons energize the bonded electrons
 Breakage of bond
 Creation of hole
 Flow of electrons and holes
 Current is generated!!!

12. Where is it used??
 Alternative power source to the primary battery in
satellites
 Solar photovoltaic panel for electricity generation
 Consumer products like calculators
 Traffic Signals
 Amplification towers in remote areas
 Refrigeration

13. How does it work

15. Solar pond
Zones of Solar Ponds
a) The Top Zone or UCZ (Upper
Convective Zone)
b) The Bottom Zone or LCZ
(Lower Convective Zone)
c) Gradient zone or NCZ (Non-
Convective Zone)

16. WORKING
 The hot brine solution is taken out without disturbing
existing brine gradient in solar pond.
 The solution taken to heat exchanger to remove heat
from brine solution.
 The vapors are used to run a turbine to generate power.
 The vapors from outlet of a turbine are condensed to
liquid in condenser and pumped to heat exchanger.

18. Conclusion
Solar
heater :
• Electricity generation!! from Solar energy
• Working
• Applications!!!
PV Cell :
• Heat water using natural energy i.e solar energy!
• How??
• Advantages!! & disadvantages
Solar Pond
:
• Zones of solar pond
• How does it work??

19. Thank you