more efficient coolers reliant on the first law?

[fifaman]

hi again

 

i am very interested in energy

is it possible to get significant quantities of heat from thin air

by compressing and cooling?

so u can have the 2 types of heat engines together

 

u can like have a piston to compress air sufficiently to boil a volatile liquid

just like an air conditioner

then the volatile liquid can have a high temperature in relation to the environment and we can extract more heat for electricity to partially power the appliance

 

and if possible ( which i have doubts about)

provide minimal surpluses?

 

thanks

[swansont]

The key is partially power. You have to do work to move heat when there is no temperature differential. You cannot recover that energy by using the heat to power another engine. Not even close.

[npts2020]

It depends what you mean by "significant". Think about a bicycle pump and how it gets warm while pumping a tire. An electric air pump can give temperatures high enough to give you a nasty burn if you touch the outlet of the pump. I think it is possible you could recover some of the energy for use but it would be such a small amount of whatever you were using to produce it to begin with that it probably isn't worth having the added equipment necessary for it. I would have to do more math than I am willing to slog through to figure out an exact number but am guessing that you could only recover a couple of magnitudes of order less than 1% of the original energy expended.

[fifaman]

right ok thanks alot

looks like the second law has like so few loopholes or none at all =(