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lsaferite · 2023-01-23 09:03:52

It's _actively_ moving heat from one location to another. What you do with that heat at the other location is another matter.

pyrale | karma 5400 | avg karma 2.93 · | 2021-07-23 11:26:50

Where does heat go, though.

sp332 | karma 55607 | avg karma 2.75 · | 2014-03-31 20:41:25

That's very cool! Where does all the heat go?

colanderman | karma 15615 | avg karma 3.76 · | 2012-06-13 13:58:48+00:00

ars: can you back up that claim? What about the description makes you think it is not a heat pump? Such a thing is possible and exists: energy in results in energy (i.e. heat) transfer from one location to another, against an energy gradient.

From the description given in the article, it seems that the energy input is simply being used to move energy from one location to another – it just so happens that the energy is sourced as heat, and is deposited as light. This is really not much different from a heat pump, so I see no reason it can't move heat up a gradient.

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samstave | karma 8461 | avg karma 0.81 · | 2016-09-15 21:49:07+00:00

Teleporting heat. Got it.

adgjlsfhk1 | karma 4911 | avg karma 2.11 · | 2022-07-24 00:18:21

Wow, point retracted. I'm honestly kind of shocked that heat can be transferred that efficiently.

fizx | karma 5250 | avg karma 4.32 · | 2014-10-10 03:47:15+00:00

Where is the heat coming from?

Sargos | karma 1857 | avg karma 2.72 · | 2019-03-25 03:08:23

> It radiates away that heat in a predictable way.

Unless that heat energy itself is also caught and used.

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Chabsff | karma 721 | avg karma 3.77 · | 2022-07-18 11:00:28

You can only cool something by making something else warmer by a larger amount. The heat has to go somewhere, and moving that heat in any non-passive way will invariably produce yet more heat in the process.

Ensorceled | karma 11982 | avg karma 3.74 · | 2018-11-28 11:55:13+00:00

> It's not that heat can't go anywhere, it's that there's nothing to carry heat away

So ... the heat stays put and doesn’t go anywhere?

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jcranmer | karma 30697 | avg karma 4.25 · | 2024-04-24 21:56:05

That's a form of increasing heat flux, #1.

neltnerb | karma 4721 | avg karma 2.71 · | 2019-12-01 19:20:14+00:00

Oh yeah, fair. Good explanation. The relationship is one directional because there are other ways to carry heat.

avip | karma 6656 | avg karma 3.68 · | 2018-08-28 19:34:12

The key feature I've missed is that "moving heat" does not imply moving the hot air itself.

analog31 | karma 17962 | avg karma 2.56 · | 2017-09-05 23:42:51

There's a statement of the 2nd law of thermodynamics, that forbids you from passively transferring heat from a cold body to a hot body.

brazzy | karma 9490 | avg karma 2.91 · | 2015-02-16 11:06:41+00:00

So where exactly would that heat come from?

monocasa | karma 27236 | avg karma 2.94 · | 2023-11-03 17:30:30

At the scale of individual particles, heat is movement.

mensetmanusman | karma 15660 | avg karma 1.72 · | 2021-01-13 18:33:00+00:00

Any entropy reduction activity in one area automatically means a lot more heat is added somewhere else :) (2nd law)

amelius | karma 42902 | avg karma 1.63 · | 2018-12-22 01:34:38

> Except it's not "heat energy", it's electromagnetic energy that's getting transferred.

Thermal radiation == electromagnetic radiation.

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tuukkah | karma 3288 | avg karma 2.31 · | 2023-05-02 23:25:35

That article doesn't have anything on the moving of heat, but there's another one on thermoelectric cooling (the Peltier effect): https://en.wikipedia.org/wiki/Thermoelectric_cooling

earthboundkid | karma 6376 | avg karma 2.89 · | 2019-09-19 17:58:52+00:00

What if you took the solar energy and used it to heat up a thermal differential between two areas, and then you tapped into the kinetic energy from that?