Raw Solar: MIT Solar Collector Breakthrough
Last Thursday, Al Gore challenged the U.S. to stop using fossil fuels in ten years. He discussed his plan and the reactions to it Sunday on Meet The Press.
Wind power may be viewed as an indirect form of solar energy moving the atmosphere, but megawatt production (like the Pickens Plan) is restricted to select wind corridors. But despite recent advances over current wind turbines, thanks to lift from airfoils (shape of airplane wings) with clever mechanical linkages and Shawn Frayne’s micropower windbelt for cheap, small and remote locations, overall there is more potential for renewable energy from direct sunlight.
The difference between wind and solar is even illustrated in Gore’s remarks, although comparing them wasn’t his primary focus. Here’s an excerpt from his speech from an article in The New York Times:
“We’re borrowing money from China to buy oil from the Persian Gulf to burn it in ways that destroy the planet,” Mr. Gore said. “Every bit of that’s got to change.”
And it can change, he said, citing some scientists’ estimates that enough solar energy falls on the surface of the earth in 40 minutes to meet the world’s energy needs for a year, and that the winds that blow across the Midwest every day could meet the country’s daily electricity needs.
MIT reported a student project to build an innovative 12-foot parabolic strip solar collector to produce steam efficiently, based on Washington state inventor Doug Wood’s designs:
One of the keys to making an inexpensive design was something Wood discovered by accident as he built a variety of solar dishes over the years: Smaller really is better. Unlike many technologies where economies of scale dictate large sizes, a smaller dish requires so much less support structure that it ends up costing only a third as much, for a given collecting area.
MIT Sloan School of Management lecturer David Pelly, in whose class this project first took shape last fall, says that, “I’ve looked for years at a variety of solar approaches, and this is the cheapest I’ve seen. And the key thing in scaling it globally is that all of the materials are inexpensive and accessible anywhere in the world.”
Pelly adds that “I’ve looked all over for solar technology that could scale without subsidies. Almost nothing I’ve looked at has that potential. This does.”
This project is a welcome antidote to the notion that a huge central grid is more cost efficient. Off-grid homesteaders, rejoice!
October 8th, 2008 at 3:19 pm
Yes! Keeping in mind the drastic environmental changes and rising fuel prices going Solar is one option open to all at minimal investments. The Solar Water heating systems are so easy to install and most of them come in a Do-it Yourself kit, With the technological advancement the once heavy, bulky hard to move panels are now available widely in light weight easy to carry by one personal only packages. The advancement in technology is not only limited to light weight, but for those concern about the aesthetics of the panels, the good news is that the panels are now available with a variety of trim colors to choose from and can be easily matched to your roof. Saving about $25.oo on ones electricity bill every month on a residence of 4. We all use hot water, as one of our basic needs and what can be a better way, than helping our environment, saving our resources and ourself’s some money other than by investing in a Solar Water Heating System.
There are a couple useful websites I’m aware off, that I would like to share with you
1. http://www.dsireusa.org - is a comprehensive source of information on state, local
, utility ans federal incentives that promote renewable engery ans energy efficieny.
2. http://www.powerpartnerssolar.com - one of the many manufacturers of certified Solar Water Heating Systems available. One place I saw the light weight panels and trim color options I was mentioning earlier.
Lastly, the local utilites in some areas also provide additional rebates and incentives for adding a Solar Water Heating Sytem to your exisitng water tank.
Keep the look out on. Feel Good and save- money for you, environment for us.
November 10th, 2008 at 5:17 pm
[…] last post about it describes it’s unique small scale economic breakthrough in some detail and I concluded “This […]