Posted on 09/05/2015 4:33:41 PM PDT by smokingfrog
It just so happens that climate-changing carbon dioxide, worked up to a semi-liquid state, could play a part in reducing emissions of its gaseous counterpart and helping to solve New England’s energy challenges.
And it could create a range of new jobs in Maine, too.
David Stapp, president of the Wiscasset-based Peregrine Turbine Technologies, said the properties of carbon dioxide in a “supercritical” state — and its suitability for propelling a turbine — aren’t new.
But the circular system his company is developing for heating that supercritical carbon dioxide could be the new take on an old technology that helps power generators adapt to changing demands, in New England and elsewhere, regardless of fuel source.
“It doesn’t care what you’re burning in there to create the heat, and that opens a whole range of technologies,” Stapp said. “We can burn things that others could only dream of.”
Biomass, coal, poultry waste, whatever. The system also uses heat exchangers to recapture heat from the supercritical carbon dioxide after it passes through the turbine, cooling it again and reusing the heat for another go-round. The company estimates the turbine will be 30 percent to 60 percent more efficient than existing steam units.
“We’re coming into the marketplace at just the right time,” Stapp said. “There’s a real need for energy innovation.”
(Excerpt) Read more at bangordailynews.com ...
breakthrough or pipe dream?
Geritol.
Looks like plenty o piping to me....
“The company has not yet built any test models of its design.”
REALLY longggggggg article about vaporware ...
“Stopped reading there”
The article is not about climate change.
Fair enough, went back and read the post. It is about power generation. Then why start the article with a false premise?
Why the hell don’t they try burning trash dump garbage and construction waste?
“Then why start the article with a false premise?”
The writer just threw that in ‘for good measure’ and to make the boss happy.
“Why the hell don’t they try burning trash dump garbage and construction waste?”
They said they could burn just about anything for this.
OPPS! The Carnot efficiency for these operating temperatures would be 63.9% So the trick is that you can get a higher top end temperature using CO2 instead of steam.
“so this looks like an improvement.”
In theory it is but Sandia is doing a lot of testing to benchmark their thermo properties and high speed turbine efficiencies.
All of you freepers have to remember that the BDN “bangor daily newspaper” is moonbat central up here in the state....I had lived in Bangor awhile....typical moonbat city...with it’s methadone clinic gay bars and the like. The airport is nothing to write home about ...way to costly to fly out of there and it is also a welfare magnet.....I moved further south in the state and found a half-way conservative section...This high end heat supply to spin the generator is pretty complex and the money would be better spent on building an incinerator plant too ship trash in by rail and spin a turbine that way and sell the electricity back to Maine power...but if that happened the trend of $2.00 town trash bags would fly out the window. They actually are doing this up here now...you MUST purchase two dollar trash bags or you get NO trash picked up even though property taxes are supposed to cover it...but I digress...it is a scam to get some taxpayer grants in order to make a 1/13th scale working model...Build an incinerator and use the top turbines now made and spin it with steam...K.I.S.S.(keep it simple stupid)
“OPPS! The Carnot efficiency for these operating temperatures would be 63.9% So the trick is that you can get a higher top end temperature using CO2 instead of steam.”
The Carnot is for an ideal reversible cycle which is not obtainable in the real world.
The Rankin cycle is more applicable to vapor systems but as you noted are limited in max temperatures. The Brayton cycle is the ideal cycle for gas turbines.
“K.I.S.S.(keep it simple stupid)”
Eliminate computers, fuel injectors and variable cams on gas engines .... KISS
My bathroom has that sink......but I do better piping repair.
Disclaimer: Opinions posted on Free Republic are those of the individual posters and do not necessarily represent the opinion of Free Republic or its management. All materials posted herein are protected by copyright law and the exemption for fair use of copyrighted works.