A STIRLING profitable to himself?

[manoria68]

Hello,
by delving a little on the net, I find this new concept of stirling.

It doesn't seem very restrictive to me to do

the link : http://moldex.pagesperso-orange.fr/air-fr.htm

[Forhorse]

I say: to be continued ...
The site is pretty well done, full of interesting technical info, but I haven't seen a photo or video of a working prototype.

[dirk pitt]

I think there are quite a few illusions based on theoretical errors on this page. all that seems very simplistic to me.

[dedeleco]

Difficult and low efficiency the Stirling with very low temperature difference with in addition huge heat exchangers with large flows for a little energy.
10 ° C on 300 ° K gives with Carnot principle thermal fluxes more than 30 times the mechanical energy (1KW gives mini 30KW thermal !!) and therefore the exchangers have a huge surface (small temperature difference)!

Vouloir thus use the temperature difference between the ground 13 ° C and the air in winter 0 ° C or less (or in summer 30 ° C), to make mechanical energy which activates a heat pump which heats to 20 ° C for free in winter is very difficult because of these very large heat flows, especially if the real system is far from the theoretical efficiency of Carnot !! !!

Georges Claude had produced such a remarkable copying machine:
http://www.clubdesargonautes.org/histoi ... unisie.php
http://www.clubdesargonautes.org/histoi ... claude.php
http://base.d-p-h.info/fr/fiches/dph/fi ... -7403.html
http://ifm.free.fr/htmlpages/pdf/2006/4 ... e-mers.pdf

It is regrettable that it was a marine failure (waves) and not scientific for an incredible project, which becomes interesting again.

[elephant]

I am not very convinced: in a stirling, (which is not that difficult to produce economically in large series: already seen the price of a chainsaw engine or a piston-cylinder compressor assembly?) the heating (therefore the expansion of the air) takes place in the cylinder. Here, I do not see where the overpressure takes place. Am I wrong?

[dedeleco]

Here, I do not see where the overpressure takes place. Am I wrong?

An acoustic wave dynamically performs this compression which is thermodynamic, adiabatic and non adiabatic with exchanger, and it works, even commercially, read all the scientific articles, because the analysis is very serious and recent understanding.

[dedeleco]

I thought we were talking about thermoacoustics in my answer.
Here the "

fluid which expands and contracts alternately depending on whether the fluid which envelops it is warmer then colder

"and therefore there is overpressure.

A system from the 1930s with "

fluid which expands and contracts alternately depending on whether the fluid which envelops it is warmer then colder

":
the Atmos commercial perpetual clock works for decades:
http://fr.wikipedia.org/wiki/Pendule_Atmos
http://en.wikipedia.org/wiki/Atmos_clock

Walk with a degree of thermal variation during the day !!

[chatelot16]

Hello,
by delving a little on the net, I find this new concept of stirling.

It doesn't seem very restrictive to me to do

the link : http://moldex.pagesperso-orange.fr/air-fr.htm

there is really too much error in it for me to believe

stirling is simple in some cases but for low temperatures the steam always allows better performance

the claude machine for the heat of the sea worked with a small temperature difference: if it was not profitable enough to make other I do not think that it is a real stirling which will do better, and I I'm not even sure this bizarre system works

on the other hand what is certain is that a thermal machine style steam engine but with a fluid giving more pressure at low temperature would make the machine more economical than steam at low pressure

when you see a heat pump it would be enough not much more to make it really reversible and transform the same temperature difference as its normal operation into mechanical energy

even if such a thermal machine is not profitable only to make electricity it could be profitable as a real heat pump when the heat pump is useful and by making electricity at other times

[dedeleco]

chatelot16 writes:

there is really too much error in it for me to believe

Since these are fairly general principles, it would be good to clarify the list of errors, to be informative and to improve.

Likewise do the list of errors with Atmos, which uses the same principle.

[elephant]

deledeco said:

An acoustic wave dynamically performs this compression which is thermodynamic, adiabatic and non adiabatic with exchanger, and it works, even commercially, read all the scientific articles, because the analysis is very serious and recent understanding.

he may be right, but I understand even less