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Researchers have developed a device that can disrupt the relationship between the absorption and emission efficiencies of an object, essentially violating Kirchhoff’s law of thermal radiation. This law, in place for over 150 years, states that an object’s ability to absorb and emit energy is equal at each wavelength and angle of incidence. This breakthrough could significantly impact sustainable energy harvesting systems and certain types of camouflage technology. (Artist’s concept.) ********************************************** Scientists have developed a device that can break the principles of Kirchhoff’s law of thermal radiation, disrupting the traditional relationship between absorption and emission efficiencies in an object. This...

FAYETTEVILLE, Ark. – A team of University of Arkansas physicists has successfully developed a circuit capable of capturing graphene's thermal motion and converting it into an electrical current. “An energy-harvesting circuit based on graphene could be incorporated into a chip to provide clean, limitless, low-voltage power for small devices or sensors,” said Paul Thibado, professor of physics and lead researcher in the discovery.The findings, titled "Fluctuation-induced current from freestanding graphene," and published in the journal Physical Review E, are proof of a theory the physicists developed at the U of A three years ago that freestanding graphene — a single...

Quantum batteries could one day revolutionize energy storage through what seems like a paradox – the bigger the battery, the faster it charges. For the first time, a team of scientists has now demonstrated the quantum mechanical principle of superabsorption that underpins quantum batteries in a proof-of-concept device. The quirky world of quantum physics is full of phenomena that seem impossible to us. Molecules, for instance, can be become so entwined that they begin acting collectively, and this can lead to a range of quantum effects. That includes superabsorption, which boosts a molecule’s ability to absorb light. “Superabsorption is a...

The European Union’s executive Commission is considering whether to include nuclear and natural gas in its “sustainable finance taxonomy”, a rulebook that will restrict which activities can be labelled as climate-friendly investments. “We are going to have most likely a discussion tomorrow in college, which then will lead… to approval next year,” EU environment commissioner Virginijus Sinkevičius told a news conference on Monday, referring to the Commission’s weekly “college” meeting.

Perovskite promises to be less expensive and more efficient than silicon—and several companies say they’re close to producing it at scale. SAULE TECHNOLOGIES ==================================================================================== Testing perovskite solar cells in the lab used to require a decent pair of running shoes. The materials fell apart so quickly that scientists would bolt from where they made the cells to where they tested them, trying to measure their performance before the cells degraded in their hands—usually within a couple of minutes. Perovskites have long enchanted researchers with the promise of producing inexpensive, ultra-efficient solar cells. And now several companies are making major strides...

Wind and solar energy are both essentially obsolete technologies. There is a reason why only the very rich or the very adventurous sail across oceans: the wind is unreliable, and at best produces relatively little energy. Nevertheless, liberals have concocted fantasies whereby all of our electricity, or perhaps our entire economy, will be powered by those fickle sources. There are a number of reasons why this will never happen, but a paper published last week by Center of the American Experiment argues that land use constraints are the most basic reason why wind and solar are inexorably destined to fail....

With NASA planning its next human mission to the moon in 2024, researchers are looking for options to power settlements on the lunar surface. According to a new article in Chemical & Engineering News, the weekly newsmagazine of the American Chemical Society, nuclear fission reactors have emerged as top candidates to generate electricity in space. When it comes to powering an astronauts’ settlement, there are many factors to consider, writes correspondent Tien Nguyen in collaboration with ACS Central Science. The power source must be capable of being transported safely from Earth and of withstanding the harsh conditions of other worlds....

I have created a solar oven with an old satellite dish and about 250 small mirrors. My thermometer reached >600 degrees F in about one minute. I'm trying to think of a way for it to automatically track the path of the sun. Any suggestions?

Scientists at the U.S. Department of Energy's National Renewable Energy Laboratory (NREL) have set a world record in solar cell efficiency...

Solar power, the holy grail of renewable energy, has always faced the problem of how to store the energy captured from the sun’s rays so that demand for electricity can be met at night or whenever the sun is not shining. The difficulty is that electricity is hard to store. Batteries are not up to efficiently storing energy on a large scale. A different approach being tried by the solar power industry could eliminate the problem. The idea is to capture the sun’s heat. Heat, unlike electric current, is something that industry knows how to store cost-effectively. For example, a...

Here is what the acolytes of solar power don't want you to know... These are the essentials you need in order to appreciate the absurdity of using solar cell power systems as any kind of sensible alternative. After you read this, ask yourself again how much sense solar power really makes. THIS IS WHAT HAPPENS TO THE SUN'S ENERGY WHEN WE USE SOLAR CELLS TO GENERATE ELECTRICITY:     SOURCE   LOSS - %     POWER - W/m2   1.     solar constant       --   1370W 2.   atmosphere       27   1000W...

For education and discussion only. Not for commercial use. Apathy, expensive equipment among hurdles Solar energy has become almost a throwback term from the energy crunch of almost three decades ago, when some environmental advocates felt homeowners could help end the country's reliance on imported oil and reduce pollution. Unattractive solar panels on rooftops popped up here and there, but generally the technology failed to catch on in any great numbers with homeowners. But some architecture students at the University of North Carolina-Charlotte proved recently that with the right technology, the sun can satisfy much of the power needs of...

Auroras may dazzle more people than usual this weekend as Earth receives a glancing blow from an enormous solar outburst that erupted on Jan. 19. The outburst, known as a coronal mass ejection (CME), was detected by sun-watching satellites. Researchers at the University of Alaska's Geophysical Institute predict that auroras should be visible from Seattle, Des Moines, Chicago, and Cleveland, to Boston and Halifax, Nova Scotia Saturday and Sunday nights, weather permitting. ... Space Weather Center forecasters say they expect the encounter to generate a weak geomagnetic disturbance beginning around 1 p.m. Eastern Standard Time Sunday Jan. 22 and lasting...

Jaguar I-Pace, off road and on track | Fully Charged

House Democratic Leader Nancy Pelosi’s husband bought up to a quarter million dollars of stock in a now financially troubled green energy company just weeks before it announced a major 2014 acquisition that sent stock prices soaring, public records show. SunEdison told regulators last week that it is eyeing bankruptcy under the weight of $11.7 million in debt. But in late 2014, investors were bullish on the company, which manufactures and operates solar and wind power facilities. Its 2014 purchase of wind energy company First Wind “further bolstered the reputation of the company,” wrote one market-watcher at the time. “Perhaps...

SunEdison is now eyeing bankruptcy, but Paul Pelosi invested right before a 2014 stock rally House Democratic Leader Nancy Pelosi’s husband bought up to a quarter million dollars of stock in a now financially troubled green energy company just weeks before it announced a major 2014 acquisition that sent stock prices soaring, public records show. SunEdison told regulators last week that it is eyeing bankruptcy under the weight of $11.7 million in debt. But in late 2014, investors were bullish on the company, which manufactures and operates solar and wind power facilities. Its 2014 purchase of wind energy company First...

Morocco has turned on its massive solar power plant in the town of Ourrzazate, on the edge of the Saharan desert. The plant already spans thousands of acres and is capable of generating up to 160 megawatts of power. It's already one of the biggest solar power grids in the world, capable of being seen from space. And it's only going to get bigger. The current grid, called Noor I, is just the first phase of a planned project to bring renewable energy to millions living in Morocco. It will soon be followed by expansions, Noor II and Noor III,...

Energy generation by wind and solar farms could reduce carbon emissions and thus mitigate anthropogenic climate change. A new climate-modeling study, published in the journal Science, finds that large-scale installations of wind and solar farms in the Sahara Desert and the neighboring Sahel region — areas particularly desirable for such farms because of their vastness and lack of inhabitants — would increase local temperature, precipitation and vegetation. ..." “Our study is among the first to model the climate effects of wind and solar installations while taking into account how vegetation responds to changes in heat and precipitation,” Dr. Li said.“Previous...

The EU has completed the biggest photovoltaic solar field in Gaza, the European Commission announced on Thursday. The field will provide 0.5 Megawatts of electricity per day to fuel the Southern Gaza Desalination Plant. The EU-funded Southern Gaza Desalination Plant currently provides drinking water to 75,000 inhabitants in the Khan Younis and Rafah governorates. With the new energy field and new investments foreseen it will eventually reach 250,000 people in Southern Gaza by 2020. Johannes Hahn, EU Commissioner for European Neighborhood Policy and Enlargement Negotiations, commented, “Limited energy supplies in Gaza are one of the main challenges when improving access...

Saudi Arabia wants to pour $200 billion into solar to build the world’s largest solar project. The Saudi sovereign wealth fund and SoftBank Group Corp. of Japan jointly announced plans to build a solar project that is staggering in size – 200 gigawatts (GW) by 2030. That would be about 100 times larger than some of the largest projects in the world right now. “It’s by far the biggest solar project ever,” Masayoshi Son, CEO of SoftBank said at a news conference Tuesday in New York after signing a nonbinding agreement with Saudi Crown Prince Mohammed bin Salman (MbS). The...