Energy & Green Tech

Stability assessment and reporting for perovskite photovoltaics

Improving the long-term stability of perovskite solar cells, which is crucial for the use of this pioneering technology—this is the topic of a paper published in the journal Nature Energy by an international research team, ...

Energy & Green Tech

Declining renewable costs drive focus on energy storage

An oft-repeated refrain—the sun doesn't always shine, and the wind doesn't always blow—is sometimes seen as an impediment to renewable energy. But it's also an impetus toward discovering the best ways to store that energy ...

Energy & Green Tech

Trump administration says it will approve largest solar farm in US

Federal officials plan to approve a massive solar farm with energy storage in the desert outside Las Vegas, paving the way for a $1-billion project that will provide electricity to Nevada residents served by billionaire Warren ...

Energy & Green Tech

Suitable energy mix for smaller communities

Solar thermal, geothermal, photovoltaic—what form of energy supply is most suitable for a particular municipality? Representatives of smaller communities are overwhelmed by a huge amount of information, which tends to exacerbate ...

Engineering

New hybrid device can both capture and store solar energy

Researchers from the University of Houston have reported a new device that can both efficiently capture solar energy and store it until it is needed, offering promise for applications ranging from power generation to distillation ...

Energy & Green Tech

Distributed solar prices fall annually by 5% to 7%

The latest edition of Lawrence Berkeley National Laboratory's (Berkeley Lab's) annual Tracking the Sun report finds that prices for distributed solar power systems continued to fall in 2018, that industry practices continued ...

Energy & Green Tech

How do solar panels work?

How do solar panels work? – Nathan, age 5, Melbourne, Australia.

Engineering

New technique lets researchers map strain in next-gen solar cells

People can be good at hiding strain, and we're not alone. Solar cells have the same talent. For a solar cell, physical strain within its microscopic crystalline structure can interrupt its core function—converting sunlight ...

Energy & Green Tech

Farewell, oil: It's time to turn our backs on an old friend

They heat our homes, power the coffee maker and keep the factories that make our clothes running. They serve as raw material for our yogurt cups, transport us to work and bring food to the shops. Fossil fuels—oil, coal ...

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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