Generalizing Carnot To Include Fuel Cells
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From: Bret Cahill on 26 Feb 2010 10:36 Carnot is almost two centuries old and only covers heat engines. With the increasing interest in fuel cells it would be nice to have something that covers fuel cells as well as heat engines. The similarities in processes as well as results between low pressure ratio highly recuperated gas turbines and fuel cells suggests that this may be possible: LPR Gas Turbine: theoretical efficiency over 80% Fuel cell: theoretical efficiency over 80% LPRGT: even higher efficiency with ceramics that rapidly degrade FC: even higher efficiency with materials that rapidly degrade LPRGT: heat transfer FC: mass transfer LPRGT: big expensive heat exchanger area for heat transfer FC: expensive contact area for mass transfer Bret Cahill
From: J. Clarke on 26 Feb 2010 12:23 On 2/26/2010 10:36 AM, Bret Cahill wrote: > Carnot is almost two centuries old and only covers heat engines. > > With the increasing interest in fuel cells it would be nice to have > something that covers fuel cells as well as heat engines. > > The similarities in processes as well as results between low pressure > ratio highly recuperated gas turbines and fuel cells suggests that > this may be possible: > > LPR Gas Turbine: theoretical efficiency over 80% > > Fuel cell: theoretical efficiency over 80% > > LPRGT: even higher efficiency with ceramics that rapidly degrade > > FC: even higher efficiency with materials that rapidly degrade > > LPRGT: heat transfer > > FC: mass transfer > > LPRGT: big expensive heat exchanger area for heat transfer > > FC: expensive contact area for mass transfer Do you have a point or are you just rambling?
From: pamela on 26 Feb 2010 15:28 J. Clarke wrote: > On 2/26/2010 10:36 AM, Bret Cahill wrote: >> Carnot is almost two centuries old and only covers heat engines. >> >> With the increasing interest in fuel cells it would be nice to have >> something that covers fuel cells as well as heat engines. >> >> The similarities in processes as well as results between low pressure >> ratio highly recuperated gas turbines and fuel cells suggests that >> this may be possible: >> >> LPR Gas Turbine: theoretical efficiency over 80% >> >> Fuel cell: theoretical efficiency over 80% >> >> LPRGT: even higher efficiency with ceramics that rapidly degrade >> >> FC: even higher efficiency with materials that rapidly degrade >> >> LPRGT: heat transfer >> >> FC: mass transfer >> >> LPRGT: big expensive heat exchanger area for heat transfer >> >> FC: expensive contact area for mass transfer > > Do you have a point or are you just rambling? He's trying to "make new science" because he is having trouble with "old science" because it doesn't say what he wants it to say.
From: Alpha Kenny Body on 26 Feb 2010 16:36 "Bret Cahill" <BretCahill(a)peoplepc.com> + Well-known idiot + 3267c29b1134(a)m35g2000prh.googlegroups.com... + Google poster + Carnot is almost two centuries old and only covers heat engines. + Off-topic +
From: spudnik on 26 Feb 2010 18:29
so, what is this "diode" supposed to be connected to? > 3) Diamond has a negative electron work function into vacuum. > 4) Osmium has a 5.92 eV electron work function into vacuum. > 5) Cold-cathode field emission vacuum diode, Type IIb diamond -> > osmium. > US Pat. 5283501 > Chem. Mater. 20(21) 6871 (2008) > Diamond and Related Materials, 15(11-12) 2082 (2006)http://adsabs.harvard..edu/abs/1994PhDT.......210B > Electron Comm Jpn Pt 2, 82(8) 42 (1999) thus: that was the paragraph before their patented new ****. > it only really does so in environments with exactly the right > ratios of heat and power requirements on a 24/7/365 basis. > here:http://www.bloomenergy.com/products/solid-oxide-fuel-cell/. thus: that is an "H2," you say, with 100mpg using *what* kind of engine?... the Bradley fughting Vehicles was said to be big peice of **** by the military, then GM sold it to us as a SUV via the pre- Governeurateur! what is the sustainable rate of "fossilized (TM)" fuel production, anyway?... or, what is the "current" rate of its production? --les OEUvres! http://wlym.com --Stop Cheeny, Rice, Pendergast and the ICC's 3rd British invasion of Sudan! http://larouchepub.com |