Stirling Engines (Could) Rule
by TreeHugger 
on 11.30.04
The first Stirling engine was created almost two centuries ago, but up ‘til now, they’ve mostly just been used as playthings. But for the past two decades, the U.S. Department of Energy has been trying to figure out how to make these things really work, and in serious ways.
Here’s the deal: Stirling engines make solar power far, far more efficiently than photovoltaic solar cells can. A Stirling solar dish--which behaves like a sunflower, following the sun all day and returning to a face-down position at night--directly converts solar heat into mechanical energy, which in turn turns an AC electrical generator. So, large farms of Stirling solar dishes (we’re talkin’ like 20k-dish farms here) could actually deliver cheap solar electricity—maybe even as cheap as we pay for electricity today...
Stirling Energy Systems, makers of said dishes, is already in a contract with the DOE. By the end of 2005, they plan to have six dishes connected into a miniature power station capable of supplying enough electricity to power about 40 homes. By 2006, a power plant could transform the combined output of the dishes for distribution of industrial-level power. From 2007 to 2010, the program proposes mass-producing dishes to create a 20,000-dish farm from its own substation that would be directly connected to the grid. By 2011, Stirling solar-dish farms could be delivering electricity to the grid at costs comparable to traditional electricity sources. (Keep your fingers crossed.)
Some people, like Mr. Gizmodo, think that Stirling engines could even be (perhaps for the better) used as portable power. As he puts it:
Now, this could mean clean energy for homes
and businesses, which is great, but I'm more
interested in portable solar-powered Stirling
generators. Like, backpack-sized. You listening,
Voltaic? Stirling solar collection dishes could
be a hot fashion accessory.
An excellent idea. Perhaps someday soon TH will even be able to give one away. Via Gizmodo ::EE Times [by MO]
Follow @TreeHugger on Twitter & get our headlines with @TH_rss!
Thirsty for more? Check out these related articles:
- Forget Going Green Because It's the Right Thing to Do—Go Green to Make Your Neighbors Jealous
- How to Use a Solar Cooker: What Works and What Doesn't
- How to Use a Solar Oven: Beans and Rice Recipe
- 7 Great Weekend Solar Power Projects
- Forget Google: Use the 7 Greenest Search Engines
- 5 Reuses for Altoid Tins
I have had my eye on the solar sterling engine for some time now...
And I agree that this technology should be manufactured in a smaller, portable, more economically priced size... It can easily be done.
Perhaps with a collapsible parabolic dish to assist with shipping and transport?
After all, the German government, and the state of California should not be the only ones capable of harnessing the sun in such a way, that is simply not fair to the masses.
The advantages to this technique of harnessing the suns power lies in its raw sturdy mechanical simplicity, unlike a conventional solar panel, it's harder to brake, the materials to produce this, and repair it, are far more readily available, and the common civilian could no doubt repair the unit with only a partial mechanical knowledge and minimal tools.
Thus, it would also serve as a great aid to those who live off the grid, and people in impoverished developing nations, where conventional panels would be inconvenient and expensive.
I ask all of those who manage and own large scale manufacturing company's who read this, please, open the door to a new world, build this, and the sales WILL come.