DIY Solar Power System
May
In this age of portable electronic devices, who has the time to find a power source? People are growing more and more mobile, spending as much time about town as at home. At the same time, we carry more battery-powered electronics with us as well, from cell phones to MP3 players to laptops. Therefore a rather ironic conflict between individual and electronic mobility arises. If you’re always on the go, how do you have time to charge all these electronic devices?
Perhaps someday the solar cell phone will catch on, but in the meantime designer Jonathan Globerson thinks he has the answer : the free solar charging station. Designed to be made from retreated bamboo, Globerson hopes his solar charging stations will pepper the urban landscape of the near future, offering the fast-paced populace a free power source for recharging their laptops and cell phones , devices which have moved from luxuries to necessities for the modern worker.
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May
Deserts are sunny places and there are a lot of them around the world. While solar power has proven its usefulness in some unlikely places (Germany), the deserted places of the world are easy targets for expansive solar projects . Increasingly the global solar industry is eating up these opportunities. Here are a few more examples:
- Nevada . The United States itself is blessed with amazing natural diversity, deserts included. Spanish solar firm, Solar Millennium, awaits approval for a 240 megawatt solar thermal plant in Nevada’s Nye County.
- North Africa . The Mediterranean Solar Plan is an initiative to populate sunny Northern African nations with renewable energy hubs, in part for energy security, in part to supply energy to hungry Europe across the sea.
- India . Pasadena-based eSolar has signed a deal with India’s ACME Group to provide its solar technology for the construction of up to 1 Gigawatt’s worth of solar thermal power plants across India. It is the single biggest venture by a U.S. solar company overseas.
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May
Most of the video and photos coming out of the war in Iraq revolve around urban areas such as Baghdad, Tikrit, or Fallujah. But there are small, remote villages in Iraq as well, and many rural residents have had problems finding potable water since much of the country’s infrastructure collapsed with the onset of war.
Enter the Commander’s Emergency Relief Program (CERP), which is embracing solar technology to solve water issues for these remote areas where drinking water is still an inconsistent commodity. CERP’s answer consists of placing solar water filters alongside a water canal in or near the villages. Residents can then drink or fill up on fresh, potable water.
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March
Freescale Semiconductor unveiled new technology for power conversion for photovoltaic devices at this year’s Applied Power Electronics Conference and Exposition (APEC) in mid-February. The breakthrough comes in the form of a tiny integrated circuit that boosts ultra-low voltage (produced by solar cells) up to levels high enough to start up small devices like cell phones.
Energy Boost for Solar Cells
The impact of this could be monumental for small electronic devices. The long-standing problem surrounding small solar applications has been this: it has been difficult to extract more than 0.3 volts from a single solar cell, not enough to start up and operate a typical cell phone. Therefore, solar cells must be arranged in strings, eventually forming panels for larger uses. Unfortunately, a string of solar cells only produces as much power as its weakest link, which means that if one cell is shaded, mismatched, or damaged, the entire string suffers. Freescale’s circuit technology — a tiny DC-to-DC converter — is able to boost the voltage from a single cell to usable levels without external assistance.
From Panels to Single Cells
The impacts of this on daily life could be huge. The ability to extract usable power from a single solar cell could mean solar powered phones that are smaller and cheaper. Freescale’s circuit could make that string of cells smaller or even unnecessary, reducing the effect of shading while increasing efficiency. (more…)
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