Presentation on Solar Energy application as per prescribed textbook Richard T. Wright – Environmental Science Most relevant for Christ University BBA (honors)

1. APPLICATION
OF SOLAR
ENERGY
T. Samuel Pongen
Christ University

2. Solar Energy
• Solar energy refers to the use of solar
radiation for practical ends.
• Solar energy originates from thermonuclear
fusion in the sun.
• Solar energy reaches the earth at 1366 watts
per square meter, half this energy reaches
the earth surface while 30% is reflected and
20% is absorbed by the atmosphere, thus full
sunlight can deliver 700 watt per square
meter.

4. Germany 44%
Rest of the
World, 6%
South Korea,
2%
Other EU, 2%
Belgium, 2%
China, 2%
France, 3%
Czech
Republic, 5%
US, 6%Italy, 9%Japan , 9%
Spain, 10%
Solar Energy consumption 2010

5. Passive Solar - Passive solar techniques include
selecting materials with favourable thermal
properties, designing spaces that naturally circulate
air, and referencing the position of a building to the
Sun.
Active Solar - Active solar technologies are employed
to convert solar energy into another more useful
form of energy. This would normally be a conversion
to heat or electrical energy.

6. Solar Thermal
Solar thermal energy (STE) is an innovative technology
for harnessing solar energy for thermal energy.
Solar Thermal Technologies :-
Solar Water Heating
Solar Space Heating
Water treatment
Cooking

7. Solar Water Heating

8. Solar Space Heating

9. • Solar Water Treatment –
Solar water disinfection (SODIS) involves exposing
water-filled plastic bottles to sunlight for several
hours. It is recommended by the WHO as a viable
method for household water treatment and safe
storage.
• Cooking –
Solar cookers use sunlight for cooking, drying
and pasteurization. They can be grouped into three
broad categories: box cookers, panel cookers and
reflector cookers. A basic box cooker consists of an
insulated container with a transparent lid. It can be
used effectively with partially overcast skies and will
typically reach temperatures of 90–150 °C.

11. Solar Power
The conversion of sunlight into electricity, either
directly using photovoltaic's (PV), or indirectly
using concentrated solar power (CSP).
Photovoltaic Cells
A solar cell is an electrical device that converts the
energy of light directly into electricity by
the photovoltaic effect. It is a form of photoelectric
cell which, when exposed to light, can generate and
support an electric current without being attached to
any external voltage source.

13. SOLAR CELL
1)Used in pocket calculators and
watches
2)PV cells provide power for
rural homes, irrigation
pumps, traffic signals, radio
transmitters, lighthouses, offshore oil drilling
platforms, Earth orbiting satellites and other
installations.
3)Power stations using Photovoltaic Cells to power
modules and inverters.

14. Concentrated Solar Power
CSP use’s mirrors or lenses to concentrate a large
area of sunlight, onto a small area. Electrical
power is produced when the concentrated light
is converted to heat, which drives a heat
engine (usually a steam turbine) connected to
an electrical power generator.

15. Solar Trough
Solar trough consists of trough shaped
reflectors, titled towards the sun.
A solar trough facility have about one-third the
capacity of a large nuclear plant and converts
22% of incoming sunlight to solar energy at
cost of 12 cents per kilowatt and hour.
Solar trough is also cost effective.

16. Solar Power Tower
A power tower is an array of sun-tracking mirrors that
focus sunlight falling on several acres of land onto a
receiver mounted on a tower in the centre.

17. Dish Engine System
• Consists of a set of parabolic concentrators
dishes that focus sunlight onto a receiver on the
dish.
• This system can achieve higher temperatures due
to higher
concentration of light.
• They have demonstrated
30% higher efficiency
and generate 5 to 40 kW
of electricity.

18. Other Uses