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2019-05-15 14:56 by Karl Denninger
in Stupidity , 120 references Ignore this thread
LOL..... Not New and Stupid
[Comments enabled]

Phononics on CNBS right now.

Peltier junctions are not new -- but they're claiming it is.

Why are not they used everywhere?

EFFICIENCY.

Thermoelectric junctions are about one quarter the energy efficiency of conventional compression-cycle units.

In other words on a Carnot-cycle basis a traditional system can manage to get into the ~50% range -- thermoelectric junctions run at 10-15% of theoretical efficiency!  This is why they're not widely-used; they make zero sense on an economic basis due to their much higher energy consumption.

CNBS of course puts these so-called "revolutionaries" on their show but there is nothing revolutionary about what they have.  Peltier-junction coolers have been available for a very long time and in fact you can buy them in the form of a cooler (you know, like an Igloo cooler?) right here and now.

Like, for example, right here:

https://www.walmart.com/ip/Coleman-40-Quart-PowerChill-Thermoelectric-Cooler-with-Power-Cord/21156022

inline

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