Energy & Green Tech

Stable solar cells from perovskite

Perovskite is a promising material. It captures the sun's rays and efficiently converts them into solar energy. It is also much cheaper than the current generation of silicon solar cells. But why are the Dutch rooftops not ...

Energy & Green Tech

The world's slow transition to cleaner energy

The transition towards cleaner energy has made progress but not quick enough to limit global warming to well below 2 degrees Celsius, as agreed in the 2015 Paris climate agreement.

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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