3. The earth receives 174 pet watts
(pw) of incoming solarenergy
radiation.Approximately 30% is
reflected backto space
4. • Earth's land surface, oceans and
atmosphere absorb solar radiation, and
this raises their temperature.
HOW DOES IT HAPPEN?HOW DOES IT HAPPEN?
5. The total solar energy absorbed by
Earth's atmosphere, oceans and land
masses in one hour is more than the
world used in one year.
6. Solar Panels are fitted to your
roof collecting energy from
the sun. This is then turned
into heat and collected via a
manifold that sits above the
evacuated tubes. It is then
piped into the hot water
system where it joins the heat
produced by your standard
domestic boiler (or biomass
boiler). An electronic
controller constantly
compares the temperature of
the solar panels with the
temperature of the water in
the cylinder. On a sunny days
the energy from the sun can
provide all an average house's
7. Solar technologies are broadly characterized as either
passive or active depending on the way they capture,
convert and distribute sunlight.
. 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.
8. Average pricing information divides in
three pricing categories: those buying small
quantities, mid-range buyers, and large
quantity buyers.
In the real world prices depend a great
deal on local weather conditions.
9. India is densely populated and has high solarIndia is densely populated and has high solar
insolation, an ideal combination for using solarinsolation, an ideal combination for using solar
power in India.power in India.India unveiled a US$19 billion plan to produce 20India unveiled a US$19 billion plan to produce 20
GW ofGW of
solar power by 2020.solar power by 2020.
