solar energy notes1

HARNESSING SOLAR ENERGY

Hello!

I am the Sun. I am very useful.

The energy from the Sun Is calledSolar Energy.

Solar Energy – Its Huge!• Solar is the only renewable energy source that is

everywhere enough to serve as a foundation of a global energy economy in nearly all the locations where energy is required.

The energy in sunlight striking the earth for 40 minutes = worldwide energy use for 1 year.

There is far more solar energy received by a small part of public lands in the desert areas.

Methods of Harnessing Solar Energy• Passive: requires building design that captures solar

energy heat and light when needed, and excludes it when excessive (usually by seasons). Many elements of passive solar design are not costly.

• Active: harnessing solar energy to store it or convert it for other applications. Some types: – Thermal: hot water for cooking, heating, or purification, industrial

heat for melting, or electricity generation through steam turbines

Photovoltaic: direct electricity generation utilizing panels or film

Concentrating solar applications use mirrors or lenses to focus sunlight – and can be thermal or photovoltaic.

What does it cost to make solar electricity?

Its free!

What are some things that solar electricity can provide power for?

• anything we currently use electricity for

• plug-in cars, making it possible to kick the petroleum habit in personal transportation, at least

Solar powered car

Indian Railways using Solar power