OK, I am convinced that a fan WILL extract more heat from the stove because of the principle that heat transfers through a medium more quickly as the temperatures on either side are further apart.
Thanks VERY MUCH for your time and explaining this to me! I will report back to the coal/wood...
OMG, finally an answer!
Why will more heat be sent into the room by cooling the stove/pipe? Is there a principle that heat transfers through a medium (metal) more quickly if the inside and outside temperatures (relatively speaking) are further apart?
So are you answering "No?" If you are, then why are there fans mounted on car radiators? DOn't the fans extract more heat from the liquid passing through?
But equilibrium is never reached in my examples. Take a coal stove: Coal burns at say 800° and heats the stove surface to 400° and the rest...
We all know a fan will spread the warmed air around to comfort the room better. But is the fan actually extracting more BTU's from the hollow metal object with heat passing through it?
I know.
Again, I ask: will blowing cooler air onto a hollow metal object with heat passing through it, extract MORE heat from that metal object, or just spread it around more quickly?
Regretfully, I cannot tell how that answers my question. Again, I ask: will blowing cooler air onto a hollow metal object with heat passing through it, extract MORE heat from that metal object, or just spread it around more quickly?
Buckleymanor: Are you saying that when heat is radiated through a metal, that the rate the heat passes through gets faster as the temperature of the outside of it becomes cooler (which is what the fan is doing - it's moving the hot air away form the outside of the metal box/cylinder)?
I'm not sure why you say I'm confused, I agree with everything you mentioned. I have read my post and cannot see how you ascertained that I have any disagreement with your statements.
Of course air is passed thru radiator coils to cool the liquid in a car.
Of course an engine will get hotter...
I posted this question in a wood/coal stove forum and after 100 responses, we do not have a convincing answer:
Will MORE heat be extracted from a heated metal object if you put a fan on it?
If we have a simple electric resistance heater (a glorified toaster) making 10,000 BTU's, it seems...
I have wondered this for years and I think I just figured it out. I could never understand that if water can get through, how can pressure change no matter HOW small the opening? The common explanations I find on the web are explanations of a mechanical device, but never of an intuitive nature...