Can the Second Law of Thermodynamics Be Circumvented?

**brewhaha@ecn.ab.ca** · #1 September 1st 03 posted to sci.physics

From: (reticher) Date: 05 Sep 2002 23:50:13 GMT
(...)
The postulated nanomachines would then be able to export energy to the
outside environment which it obtained by reducing the temperature of the
liquid.

That would break the first law of thermodynamics.

(...)
A similar molecule approaching the trapdoor from the left side
would bounce back and not pass through to the right side. When the
molecule on the right passed through the trapdoor, it would lose most of
its kinetic energy to the trapdoor and exit at a low velocity.

The thing about the particle coming from the left is that it would
gain energy that orijinated with particles coming from the right.

(...)
The process would generate a local temperature difference which would
quickly be equalized by any reasonable level of heat transfer.

You certainly took your time getting there, and yet much of your
description seems to deny this.

Relocating the ratchet mechanism to the interior of the fluid
chamber cools it close to the temperature of the fluid and dampens its bounce.

Maybe, but you lose the advantage of leverage in the interior, so
I doubt it.

A theoretical demonstration that the mechanism suggested by the author
cannot work requires a proof that the permeability of all possible
diffusion membranes must be the same in both directions.

A membrane bordered with teflon, placed inside a bundt bowl or
tire-shape (but rounder), if such a membrane were permeable in only one
way, could cycle around this torus. We could just about be talking of the
situation of a salt solution and a water solution divided by a
semi-permeable membrane, where the water would flow to dilute the salt
solution, potentially creating pressure.

The question of unidirectional permeability may well be one of
magnitude or how much pressure could be jenerated, because osmotic
pressure always has bounds of pressure. Would it be enough to move the
whole membrane?

I'll remind you that you're talking about breaking the FIRST law
of thermodynamics. The burden of proof for perpetual motion machines lays
with the theorist who postulates them. The absolutely vast ratio of
designs to working models being reason enough. And certainly when you're
talking of turbines and forgetting your own note that there would be a lot
of heat leakage, you're way out in left field, reticher.
_______
"This perpetual motion machine is a joke: It just keeps going faster and
faster...
In THIS house we OBEY the laws of THERMOdynamics."
--Homer Simpson

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