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From: Ivar S. Ertesvåg on 7 Mar 2010 03:50 Bret Cahill wrote: >>>Similarly someone needs to come up with a maximum limit formula/law/ >>>equation that will cover _any_ mechanism that oxidizes fuel to >>>ultimately produce mechanical work. >> >>>Bret Cahill >> >>This "came up" decades ago.... >>One of its forms are known as exergy analysis of reacting systems. >>Take a look in a thermo-textbook or search for combinations of >>"exergy analysis" AND "fuel cell" or "reacting system" > > > We need a combination of "fuel cell" + "heat engine." > And anything else that can get mechanical work from fuel. > > Bret Cahill The theory referred covers any combination of fuel cells and heat engine (and electric motors, which you can use to get meachanical work from a fuel cell). You did not bother to read (advanced) thermodynamics, did you? On the other hand, the label "Carnot" primarily refers to thermal conversion, simply because this was what Sadi Carnot was writing about. Other labels (e.g. "Gibbs") are more relevant for the extended theory.
From: Bret Cahill on 7 Mar 2010 12:45 > >>>Similarly someone needs to come up with a maximum limit formula/law/ > >>>equation that will cover _any_ mechanism that oxidizes fuel to > >>>ultimately produce mechanical work. > > >>>Bret Cahill > > >>This "came up" decades ago.... > >>One of its forms are known as exergy analysis of reacting systems. > >>Take a look in a thermo-textbook or search for combinations of > >>"exergy analysis" AND "fuel cell" or "reacting system" > > > We need a combination of "fuel cell" + "heat engine." > > And anything else that can get mechanical work from fuel. > > > Bret Cahill > > The theory referred covers any combination of fuel cells and heat > engine (and electric motors, which you can use to get meachanical > work from a fuel cell). Carnot applies to solar thermal, geo thermal and nuclear. Does it apply to these? Bret Cahill
From: jimp on 7 Mar 2010 12:53 In sci.physics Bret Cahill <BretCahill(a)peoplepc.com> wrote: >> >>>Similarly someone needs to come up with a maximum limit formula/law/ >> >>>equation that will cover _any_ mechanism that oxidizes fuel to >> >>>ultimately produce mechanical work. >> >> >>>Bret Cahill >> >> >>This "came up" decades ago.... >> >>One of its forms are known as exergy analysis of reacting systems. >> >>Take a look in a thermo-textbook or search for combinations of >> >>"exergy analysis" AND "fuel cell" or "reacting system" >> >> > We need a combination of "fuel cell" + "heat engine." >> > And anything else that can get mechanical work from fuel. >> >> > Bret Cahill >> >> The theory referred covers any combination of fuel cells and heat >> engine (and electric motors, which you can use to get meachanical >> work from a fuel cell). > > Carnot applies to solar thermal, geo thermal and nuclear. > > Does it apply to these? > > > Bret Cahill Perhaps if you were to do some studying and learned what terms like "Carnot cycle" and "Reynolds number" actually mean and where they apply instead of just throwing them out in a vain attempt to impress people, you wouldn't be the subject of so much ridicule. -- Jim Pennino Remove .spam.sux to reply.
From: Ivar S. Ertesvåg on 9 Mar 2010 16:52 Bret Cahill wrote: >> >>The theory referred covers any combination of fuel cells and heat >>engine (and electric motors, which you can use to get meachanical >>work from a fuel cell). > > > Carnot applies to solar thermal, geo thermal and nuclear. > > Does it apply to these? > > > Bret Cahill > You did certainly not bother to read (advanced) thermodynamics. "Carnot" is still valid and part of the more general theory.
From: Bret Cahill on 9 Mar 2010 22:17
> >>The theory referred covers any combination of fuel cells and heat > >>engine (and electric motors, which you can use to get meachanical > >>work from a fuel cell). > > > Carnot applies to solar thermal, geo thermal and nuclear. > > > Does it apply to these? > > > Bret Cahill > > You did certainly not bother to read (advanced) thermodynamics. You dodged the question. Here, we'll try again: Carnot applies to solar thermal, geo thermal and nuclear. Does it apply to these? Bret Cahill |