Energy & Green Tech

Technical feasibility of sustainable fuels production demonstrated

Researchers at ETH Zurich have developed the process technology that can produce carbon-neutral transportation fuels from sunlight and air. Now, in a Nature publication, they demonstrate the stable and reliable operation ...

Energy & Green Tech

India, UK to launch global solar grid project at COP26

India and the U.K. will launch a project that aims to create a solar grid connecting countries in different parts of the world at the upcoming U.N. climate talks in Glasgow, Scotland.

Energy & Green Tech

Utilising demand flexibility in electricity distribution networks

The transition to sustainable energy sources like wind and solar and the introduction of electric vehicles and heat pumps are putting a growing strain on our electricity distribution networks. To prevent overloading and reinforcing ...

Energy & Green Tech

New model better predicts solar cell output power in all weather

The world is in dire need of a large-scale transition away from fossil fuels and towards sustainable energy sources to prevent an environmental crisis. Thanks to recent advances in various scientific and engineering disciplines, ...

page 2 from 37

Solar energy

Solar energy is the radiant light and heat from the Sun that has been harnessed by humans since ancient times using a range of ever-evolving technologies. Solar radiation along with secondary solar resources such as wind and wave power, hydroelectricity and biomass account for most of the available renewable energy on Earth. Only a minuscule fraction of the available solar energy is used.

Solar power provides electrical generation by means of heat engines or photovoltaics. Once converted, its uses are limited only by human ingenuity. A partial list of solar applications includes space heating and cooling through solar architecture, potable water via distillation and disinfection, daylighting, hot water, thermal energy for cooking, and high temperature process heat for industrial purposes.

Solar technologies are broadly characterized as either passive solar or active solar depending on the way they capture, convert and distribute sunlight. Active solar techniques include the use of photovoltaic panels and solar thermal collectors (with electrical or mechanical equipment) to convert sunlight into useful outputs. Passive solar techniques include orienting a building to the Sun, selecting materials with favorable thermal mass or light dispersing properties, and designing spaces that naturally circulate air.

This text uses material from Wikipedia, licensed under CC BY-SA