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Radiant Energy
19% energy absorbed by vapor, ozone,
dust, etc. 8% energy dispersed in the atmosphere
17 % energy reflected by clouds4% energy absorbed by clouds
6% energy reflected by the Earth’s surface
46% energy absorbed by the Earth
o Drying Agricultural Productso Heating Watero Space Heatingo Generating Electrical Energy
Major Uses of Solar Energy
Solar Technologies
o Daylighting &Passive Solar Heating
o Active Solar Heating
o Photovoltaics (PV) o Concentrated
Solar Thermal
PV Array Component
s
o PV Cellso Moduleso Arrays Solar cells can be found on many small
appliances, like calculators, and even on spacecraft.
They were first developed in the 1950s for use on U.S. space satellites.
They are made of silicon, a special type of melted sand.
Photovoltaic Solar Cells
Photovoltaic cells convert energy from the sun directly into electricity.
In this movie, engineers Beth Richards and Miguel Contreras give your students a clear and engaging "101" on this renewable energy technology, and demonstrate the basic math and science behind it.
In Our Backyard
CSU, San Bernardino has installed solar arrays on many of its buildings. It also has an on-ground solar array.
Concentrating Solar Thermal
GemaSolar Spain features a tower that is heated by the sun using the 2,493 mirrors that surround it,
Molten salt pumped through the tower is heated up to over 1,100 degrees F.
Some of the superheated liquid salt generates steam to run a turbine generator, while the rest is stored in giant pools so it can run the turbine when it's dark out.
At around 20 million watts, the plant generates enough electricity for about 25,000 homes.
In Our Backyard
The Ivanpah Solar Electric Generating System is now under construction in California’s Mohave desert
Ivanpah utilizes proven solar thermal technology and a low environmental impact design to power California’s clean energy economy with cost-competitive and reliable solar power.