The surface of the Earth receives an amount of solar energy equivalent to roughly 10 000 times the worlds energy demand. Of course there isn’t always sunlight, but the solar panels can store the energy, and they are getting better and better at it. A solar panel converts one sixth of the sunlight into electrical energy. Although they also are getting able to turn more and more of the sunlight into energy, they are already so efficient that space isn’t much of an issue anymore. The area of solar cells needed to supply a family with electricity is usually much smaller than the roof of their house. And when including the land required for mining and excavation of coal, CPS-plants (power-plants that rely on solar energy) are more space-efficient than power-plants fueled by coal. Solar power is roughly fifty times as space-efficient as growing crops for bio fuels. And that’s just with the technology that currently is commercialized.

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New findings from Dr Anthony Patt of the International Institute for Applied Systems Analysis in Africa shows that the proposed supergrid that could power all of Europe with renewable energy only would need around £50 billion of government funded money to become a reality.

The £50 billion government investment would, according to Patt, convince private companies that the supergrid idea is both “feasible” and “attractive”, the Guardian reports.

“In the long term, such a plan, combined with strings of windfarms along the north Africa coast, could “supply Europe with all the energy it needs”.

He said technological advances combined with falling costs have made it realistic to consider north Africa as Europe’s main source of imported energy.

“The sun is very strong there and it’s very reliable. There is starting to be a growing number of cost estimates of both wind and concentrated solar power for North Africa….that start to compare favourably with alternative technologies. The cost of moving [electricity] long distances has really come down.”

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Photo credit: afloresm

The Guardian reports that in the Andalucian deserts, 20 miles outside Seville, the Spanish company Abengoa will soon open up the world biggest solar power tower.

Over 1,000 mirrors, each “about half the size of a tennis court”, will be used to reflect sunlight to “superheat” water at a central tower. Once completed, at a cost of €80 million, the energy plant will generate 20MW of electricity to 11,000 Spanish homes.

“Concentrated solar power (CSP) technology, as it is known, is seen by many as a simpler, cheaper and more efficient way to harness the sun’s energy than other methods such as photovoltaic (PV) panels. But CSP only works in places with clear skies and strong sunshine.

The Andalucian deserts are an ideal location, and Spain hopes the PS20 plant will enable it to take advantage of its huge solar resource and lead the field in CSP technology.

“The radiation hitting the earth is 10,000 times the consumption of energy,” said José Domíngues Abascal, chief technology officer at Abengoa, the Spanish energy company behind the plant. “There is great potential in solar energy.””

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According to the U.S. Energy Information Administration renewable energy now accounts for more than 10% of the domestically-produced energy in USA during the first half of 2008. Most of the energy comes from renewable energy sources such as biomass/biofuels, geothermal, hydropower, solar and wind.

This number can be compared to the 11.98% of energy that nuclear energy contributes to in USA. According to the SUN DAY Campaign the total consumption of nuclear power dropped by 1% during the first half of 2008 while the renewable energy increased by 5%.

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The French President Nicolas Sarkozy earlier this summer launched, with the support of EU, a new Mediterranean union with the aim to “tackle issues such as regional unrest, immigration to pollution.”

The new international body will include 16 non-EU states from around the Mediterranean and all 27 EU member states. The union will focus on dealing with energy, security, counter-terrorism, immigration and trade. The union will include 756 million people from Western Europe to the Jordanian desert.

Some say that the Union was launched mainly because Nicolas Sarkozy wanted to “exchange” nuclear power expertise with North African gas reserves. Nicolas Sarkozy on the other hand says the union is supposed “to ensure the region’s people could love each other instead of making war.”

But some people are more positive and hope the union is the first steps towards large scale solar plants in northern Africa with focus of generating green and renewable electricity to Europe.

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Just in time for Al Gore’s major renewable energy challenge Florida’s Public Service Commission has “unanimously and enthusiastically” approved plans to build USA’s largest commercial solar-power plant (so far, we hope). Two other facilities also got the green light by the committee and are due to go online around 2009.

SunPower has been chosen to construct the three solar plants in the state of Florida. Howard Wenger, senior vice president, global business units for SunPower, said that “these agreements confirm the growing trend in the U.S. to build solar power plants at a scale rivaling those in market-leading countries such as Germany and Spain.”

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Will your house be solar-powered by “rose-tinted” windows in the future? At least that’s what professor John Bell from the Queensland University of Technology in Australia hopes.

He has worked with Dyesol, a Canberra-based company, trying to develop affordable transparent solar cells that act as both windows and energy generators in houses or commercial buildings.

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Here is another clever advertisement. This one is a billboard/solar plant. Yes, you heard right. The billboard has been transformed to a solar plant and generates about 3.4 Kw of electricity during the day. According to Pacific Gas and Electric (PG&E), the owners of the ad, says that is enough electricity for a family of four.

Jennifer Zelwer, Pacific Gas and Electric (PG&E) spokesperson, said that “the energy that is collected by the solar panels actually exceeds the amount used by it on a day-to-day basis.” She proudly (I guess) stated that “this isn’t a billboard. It’s a power plant.”