Where Does Solar Energy Come From Wikipedia

Solar power is the conversion of energy from sunlight into electricity either directly using photovoltaics pv indirectly using concentrated solar power or a combination concentrated solar power systems use lenses or mirrors and solar tracking systems to focus a large area of sunlight into a small beam.

Where does solar energy come from wikipedia. Human action eg trees cut down for bio fuel are replaced by. There is considerable academic and commercial interest. Solar power the production of electricity from solar energy is performed either directly through photovoltaics or indirectly using concentrated solar power csp. The term solar vehicle usually implies that solar energy is used to power all or part of a vehicle s propulsion.

A renewable energy resource is one that is being or can be replenished as it is used. A solar vehicle is an electric vehicle powered completely or significantly by direct solar energy. It is an essential source of renewable energy and its technologies are broadly characterized as either passive solar or active solar depending. Solar energy is the transformation of heat the energy that comes from the sun it has been used for thousands of years in many different ways by people all over the world.

The oldest uses of solar energy is for heating cooking and drying today it is also used to make electricity where other power supplies are not there such as in places far away from where people live and in outer space. Renewable resources are replenished either by. Gemasolar in spain was the first to provide 24 hour power. The sun emits em radiation across most of the electromagnetic spectrum although the sun produces gamma rays as a result of the nuclear fusion process internal absorption and thermalization convert these super high energy photons to lower energy photons before they reach the sun s.

Photovoltaic cells convert light into an electric current using the photovoltaic effect. Many solar cookers currently in use are relatively inexpensive low tech devices although some are as powerful or as expensive as traditional stoves and advanced large scale solar cookers can cook for hundreds of people. The spectrum of the sun s solar radiation is close to that of a black body with a temperature of about 5 800 k. Usually photovoltaic pv cells contained in solar panels convert the sun s energy directly into electric energy.

The state is required to obtain at least 33 of its electricity from renewable resources by 2020 and 50 by 2030 excluding large hydro. One advantage that csp has is the ability to add thermal storage and provide power up to 24 hours a day.