SW Ontario | Supa Dexta - 11/13/2014 12:25
How do air cooled engines work then?
(poking a fire here)
Wind chill is not the same...they are similar. Blowing air will certainly reduce the boundary layer of warm air and thus speed up cooling.
Wind chill is when there is a chemical equation involved...specifically the latent heat of evaporation which makes the air 'feel' cooler than it really is.
For instance, on human skin, saturated air at 60 degrees F blowing on you will not feel as cold as 60 degree dry air. The dry air will evaporate the moisture from your skin and the latent heat of evaporation will have an additional effect of cooling on top of the moving air.
A piece of metal does not sweat and therefore does not feel this wind chill, but certainly will cool down quicker with a breeze as opposed to still air.
Cooling effect on humans:
still air < moving saturated air < moving dry air
The later two are the wind chill on wet surfaces...on dry surfaces they have a negligible effect.
Did that help... or make it worse? |
How long would you guess it would take a block heater to............
