1. A metal cooler is like a car in the sun--jump on the car naked you'll understand. 2. The air rising off a roof is 130 to 140 degrees (ask any roofer) and then it's sucked into the metal cooler. 3. The cooler also absorbs heat from the roof thur the frame and duct work. (three types of heat tranfer working against it) explain this to me--no one has yet.
2006-08-17 20:13:45 · 3 answers · asked by JILL NUDE TELEMARKETER 1 in Science & Mathematics ➔ Physics
Mostly in order to distribute the cooled air throughout the building, which is most easily done from the ceiling. It would indeed be more efficient to put the cooler in the shade somewhere and pipe the cooled air to where you want it, but if you are going to spend enough money to do that you probably have enough to buy an air conditioner.
2006-08-17 20:21:00 · answer #1 · answered by Anonymous · 1⤊ 0⤋
A liquid undergoes a phase change with evaporation and there is an associated latent heat absorbed. On a molecular level, molecules in a liquid or solid, through their mutual attractions (Van der Walls, H-bonding, ionic, covalent) are in a bound state and energy must be supplied for a molecule to escape the potential energy well. The liquid absorbs energy from the cooler to convert to a gas and carries this energy away.
2006-08-17 20:50:33 · answer #2 · answered by d/dx+d/dy+d/dz 6 · 0⤊ 1⤋
Evaporation of a liquid disburses heat very fast, that's why you sweat, so the liquid will evaporate and cool your body.
btw: It doesn't matter if 3 sources of "heat" are working against it, if this one source of "cooling" is greater than all three combined, does it? :-)
2006-08-17 20:20:06 · answer #3 · answered by Anonymous · 0⤊ 1⤋