Open Systems

[LibreEnergia]

Libre:'Like a heat pump you mean...?'

Me: no ordinary heat-pump no.this one can be special

No it can't, except perhaps in fantasy land where the heat in a gas remains constant when it is compressed.

[profitis]

Libre:'fantasy land where the heat in a gas
remains constant when it is compressed.'

Me: welcome to fantasyland where T opposes P (E=RT/nf ln P) during phase-change

[LibreEnergia]

Libre:'fantasy land where the heat in a gas
remains constant when it is compressed.'

Me: welcome to fantasyland where T opposes P (E=RT/nf ln P) during phase-change

That is of no consequence. He believes the heat in  a gas does not change when work is done on it. It does change and has been described many times why that is so. If it worked as he proposes then yes it would be over-unity. You could create a 'cold sink' and cause heat from the environment to flow into it without having to exhaust it back to the environment against a temperature gradient.

Unless of course you believe the phase change event can also exhibit net energy gain around a full cycle , then it's game over for this device.

[LibreEnergia]

I can't fault Tinman for using PSI as his preferred unit of pressure.  FWIW he is in Australia.

In post #142 he apparently has a problem with using 'psi' as a unit of pressure measurement.

I was just pointing out I never have. Any engineering ever done by myself was in SI units.

[MarkE]

In post #142 he apparently has a problem with using 'psi' as a unit of pressure measurement.

I was just pointing out I never have. Any engineering ever done by myself was in SI units.

While I greatly prefer to work in SI units, scaling is just nuisance arithmetic.  In 142 he seemed to be saying he thinks it is necessary to integrate to find total force.  That would make sense if one were trying to find stress on a joint.