Jeff writes:

It looks like you can't read - the spec sheet says "Average current
consumption for 12 VDC systems over 24-hour period"

I explained why the spec you quote is stupid, because current is not
measured in amp-hours. You haven't grasped that.

Peltier technology certainly works and has it place. Are you claiming
that's a hoax also?

It was touted for many applications that an engineer could easily see
were futile. To the extent it was promoted to the public that couldn't
so easily see the futility, yes, it was a hoax.

Yes, CO2 is a refrigerant and you can build a refrigerator based on it.
What you can't do is build a CO2 refrigerator that works as well as,
say, an R-134a unit. If you were to genuinely engineer improvements in
CO2 refrigeration that made it less ridiculous, then those same
improvements would make R-134a systems that much better, too. This is
because R-134a is an inherently better phase-change refrigerant in all
its material properties than CO2.

It's like the banned R-12 vs R-134a. R-12 is always the better choice,
in terms of engineering. The substitution was made for reasons other
than engineering. To the extent CO2 is used, it is essentially the same
process, substituting an inferior refrigerant for political reasons, not
because it is anywhere as good as what it replaced.

You can make a phase-change heat pump out of any condensible gas. Few
such materials make a good heat pump.