Scientists report asymmetry between heating and cooling
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Re: Scientists report asymmetry between heating and cooling
#2Does this mean ideal building design is as cool as possible and using energy for heating?
Re: Scientists report asymmetry between heating and cooling
#3I always feel a little stupid or strange reading a lot of these science headlines and introductions. I wasn't aware that people considered there to be a symmetry between heating and cooling. I thought that the entire point of thermodynamics is that they are asymmetric. Even the article mentions that it's been known that heating is more efficient than cooling.
Re: Scientists report asymmetry between heating and cooling
#4[deleted]
Re: Scientists report asymmetry between heating and cooling
#5 >And have questions like: 'Why don't we have a device like a microwave oven for fast cooling?'"
It's not commonly found in households, but that's different from saying "we don't have a device" that does this.
EDIT: Yes folks, I do understand how the principles of operation differ. Point being that the humble countertop convection oven definitely qualifies as "a device like a microwave oven for fast heating," and a blast chiller is just the reverse of that.
Re: Scientists report asymmetry between heating and cooling
#6Does this have anything to do with volatility drag in trading?
Re: Scientists report asymmetry between heating and cooling
#7I always feel a little stupid or strange reading a lot of these science headlines and introductions. I wasn't aware that people considered there to be a symmetry between heating and cooling. I thought that the entire point of thermodynamics is that they are asymmetric. Even the article mentions that it's been known that heating is more efficient than cooling.
> On the other hand, cooling at the microscopic level involves the release of energy from individual particles, resulting in a dampening of their motion. This process corresponds to the system losing energy, leading to a decrease in the intensity of particle movement.
It actually makes sense, doesn’t it? Heating the object adds energy constructively. In cooling, energy removed from one particle may in fact be absorbed again by neighboring particles, so it is not ‘efficient’. So I’d venture a guess at saying the object cools from outside until it is entirely cooled.
Re: Scientists report asymmetry between heating and cooling
#8Does this mean ideal building design is as cool as possible and using energy for heating?
I'm not an expert at all, but from my understanding, the ideal building is one that has so much insulation that its interior is kept at a set temperature with very little cooling and heating needed.
Re: Scientists report asymmetry between heating and cooling
#9> While no immediate practical applications exist, the researchers envision enhanced efficiency in micromotors, microscale cargo transport, and materials that can self-assemble or self-repair.
Everyone who has ever written a grant application will recognise this wording.
Re: Scientists report asymmetry between heating and cooling
#10>And have questions like: 'Why don't we have a device like a microwave oven for fast cooling?'" Isn't that... just a blast chiller? (AKA a convection oven in reverse) It's not commonly found in households, but that's different from saying "we don't have a device" that does this. EDIT: Yes folks, I do understand how the principles of operation differ. Point being that the humble countertop convection oven definitely q…
Microwaves penetrate the interior of objects (outside of metal) that are in their Faraday cages, leading the internal temperature of those objects to rise dramatically. Blast chillers work like reverse ovens, from the surface to the interior.