Free Republic

Spain and Morocco want to build an ambitious crossing over, or under, the Strait of Gibraltar by the beginning of the next decade. In this video, we'll explore the possibility of building a bridge or a tunnel between Europe and Africa and why the 2030 World Cup could be the spark that sets everything in motion.0:00 Strait of Gibraltar Crossing0:32 History of the Strait of Gibraltar 2:37 Why Building a Crossing Makes Sense3:29 Could a Bridge Actually Work?4:31 The Greatest Challenge8:04 An Insane Proposal for a Gibraltar Bridge8:40 A Tunnel Between Continents10:17 Gibraltar's New 2030 TunnelGibraltar's Insane $10B Tunnel to...

President Joe Biden on Wednesday bragged about his administration’s plans to build a solar farm in Africa that U.S. taxpayers are funding a $900 million loan for. Biden’s boast occurred during a speech hosted by the League of Conservation Voters, in which he promoted his administration’s energy and environmental policies, including the Inflation Reduction Act (IRA), a seemingly non-existent railroad from the Pacific Ocean to the Indian Ocean and “one of the largest solar plants in the world” in Angola. To fund this solar plant — which is a partnership between the Angolan government, and U.S.-based firms AfricaGlobal Schaffer and...

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...

As part of a broad mission to end extreme poverty worldwide the Obama administration is giving unproven startups millions of dollars to create solar power in Africa. It’s a multi-million-dollar U.S. initiative to inspire entrepreneurs and investors to help bring enough connections so households in sub-Saharan Africa have access to clean, modern and affordable electricity. Uncle Sam will pitch in around $36 million and the money will flow through Power Africa, a program created by President Obama to increase the number of people with access to power in the world’s second-largest continent. More than 600 million people in sub-Saharan Africa...

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,...

> A few years ago, scientists began to calculate just how much energy the Sahara holds. They were astounded at the answer. In theory, a 35,000-sq.-mi. (90,600 sq km) chunk of the Sahara — smaller than Portugal and a little over 1% of its total area — could yield the same amount of electricity as all the world's power plants combined. A smaller square of 6,000 sq. mi. (15,500 sq km) — about the size of Connecticut — could provide electricity for Europe's 500 million people. "I admit I was skeptical until I did the calculations myself," says Michael Pawlyn,...

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...

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...

Solar-power modules that concentrate the power of the sun are becoming more viable. A worker arranges wafers that will be fabricated into superefficient solar cells. These cells could help dramatically reduce the cost of generating electricity from solar energy. (Credit: The Boeing Company) Technologies collectively known as concentrating photovoltaics are starting to enjoy their day in the sun, thanks to advances in solar cells, which absorb light and convert it into electricity, and the mirror- or lens-based concentrator systems that focus light on them. The technology could soon make solar power as cheap as electricity from the grid. The idea...

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...

Starting with US, with expected transition to Europe In a TED talk published a few days ago, Tesla CEO Elon "it's coming sonn" Musk said  that in addition to the lithium-ion battery factory – or Gigafactory – under construction in Nevada, the compan will announce locations for up to four more "gigafactories" later this year. Tesla’s first lithium-ion battery production factory began construction in Reno, Nevada in the summer of 2014 after Panasonic reached a basic agreement with Tesla to invest in a factory estimated at $5 billion. Panasonic would lead the battery cell portion of the manufacturing, while...

Solar cells made from an inexpensive and increasingly popular material called perovskite can more efficiently turn sunlight into electricity using a new technique to sandwich two types of perovskite into a single photovoltaic cell. Perovskite solar cells are made of a mix of organic molecules and inorganic elements that together capture light and convert it into electricity, just like today’s more common silicon-based solar cells. Perovskite photovoltaic devices, however, can be made more easily and cheaply than silicon and on a flexible rather than rigid substrate. The first perovskite solar cells could go on the market next year, and some...

A new MIT study offers a way out of one of solar power's most vexing problems: the matter of efficiency, and the bare fact that much of the available sunlight in solar power schemes is wasted. The researchers appear to have found the key to perfect solar energy conversion efficiency—or at least something approaching it. It's a new material that can accept light from an very large number of angles and can withstand the very high temperatures needed for a maximally efficient scheme. Conventional solar cells, the silicon-based sheets used in most consumer-level applications, are far from perfect. Light from...

An improvement in the makeup of solar cells generates electricity while maintaining a 70% transparency, making it adaptable to homes and businesses to reduce energy costs. The polymer solar cell is light, flexible and cheap to produce. If this goes into mass production, it could spell the end of unsightly bulky roof mounted solar panels. "These results open the potential for visibly transparent polymer solar cells as add-on components of portable electronics, smart windows and building-integrated photovoltaics and in other applications" Comments

New Book: Solar Cells 23,000 Times Worse for Environment Than Carbon Dioxide Tuesday, June 05, 2012 – by Staff Report Solar Cells Linked to Greenhouse Gases Over 23,000 Times Worse than According to New Book, Green Illusions ... Solar cells do not offset greenhouse gases or curb fossil fuel use in the United States according to a new environmental book, Green Illusions (June 2012, University of Nebraska Press), written by University of California - Berkeley visiting scholar Ozzie Zehner. Green Illusions explains how the solar industry has grown to become one of the leading emitters of hexafluoroethane (C2F6), nitrogen...

US chemists have shown that trace impurities - below the sensitivity of standard characterisation techniques - can halve the efficiency of bulk heterojunction (BHJ) solar cells. Their finding means that initially promising materials for device applications may have been written off prematurely owing to their low efficiencies.  Trace impurities are difficult to detect owing to their similarity to donor molecules in solar cells. The impurities can significantly influence photovoltaic properties Unlike traditional inorganic solar cells, polymer cells do not immediately create charge carriers but instead create electron-hole pairs called excitons over a donor-acceptor interface, which migrate to the electrodes. In...