1. How is
Used on Earth ?

2. Different ways are used to capture and use the energy of the sun
Different ways are used to capture and use the energy of the sun. The uses of this energy are expanding fast with the development of modern technologies.

3. Rooftop Photovoltaics (PV)
The PV systems convert sunlight directly into electricity using p-n junctions. The system consists of a number of modules connected together and are ideally placed on equator-facing angles, at an inclination slightly less than the site latitude.

4. Large Scale PV Farm
Solar farms that are of larger size have a large number of large PV modules connected together for generating large amounts of solar electricity. For improving the amount of sun captured by the face of PV module some of the farms make use of tracking systems for tracking the sun.

5. Solar Hot Water
The solar hot water systems supply heated water at the point of use by making use of sunlight for generating heat energy and not electricity. Systems can be boosted by electricity or gas to supply heated water when the sun isn’t shining.

6. Remote Area Power Supply (RAPS)
Typical Remote Area Power Supply (RAPS) systems are utilized in remote places in Australia and have a PV panel and battery bank for storing electricity for future usage. A generator set is needed for an emergency backup.

7. Concentrating Solar Power System
Concentrating solar power devices concentrate on the sun’s thermal energy for driving a heat engine or generator. This is done by using mirrors arranged in a trough, tower or dish configuration.

8. Active Solar Heating
Active solar heating system makes use of solar collectors. The solar radiation heats up the collectors, which transfers heat to water or air. This kind of system is used mainly for water and space heating.

9. Passive Solar Heating
Passive solar heating harnesses the natural heat and the sunlight, making use of basic elements of the building like windows, walls, roofs and floors for controlling sun’s energy, which is lost or absorbed in a building and moved through air handling.

10. Solar Ponds
These capture the sun’s heat energy in water. Salt is used for holding more heat energy in deeper parts of the pond. The water’s heat energy is stored in big insulated storage containers and may be used for powering a steam turbine and producing electricity later.

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