hi i want to know the way that a refrigerator gets rid of heat with referance to heat transfer methods. such as conduction, convection etc...
2006-10-09 18:04:59 · 5 answers · asked by coolcat 1 in Science & Mathematics ➔ Physics
the coolant is undergoing a "endothermic reaction" that is to say the condenser condenses the freon causing it to take heat from the surrounding areas to change from a gas to a liquid... then it is pushed through the tubes on the back of the fridge and this causes it to cool the fridge... heat moves from areas of high energy to areas of low energy naturally. so when the freon/coolant changes from a vapor to a liquid it lozes energy and so the heat energy from the fridge moves naturally into it. Condensation
2006-10-09 18:09:25 · answer #1 · answered by scottishchristiansen 3 · 0⤊ 0⤋
A refrigerator uses has a pump that pushes freon gas through a small nozzle inside of a pipe. Given the laws of chemistry (which I will skip) the gas in the pipes on the side of the nozzle that the pump is on gets hot and the gas in the pipes on the side of the nozzle the pump is *not* on, gets cold. The cold pipes are inside the refrigerator, the hot ones are outside on the back of the refrigerator.
1) Conduction. Heat is conducted from the hot freon gas through the pipe walls to the air. This creates warm air.
2) Convection. The hot air rises up behind the refrigerator and over the top. The has the effect of "pulling" in cooler air underneath the refrigerator. :-)
On the inside of the refrigerator:
1) Conduction. Heat is conducted from the air inside the refrigerator, through the pipe walls into the cold freon gas. This cools the inside of the refrigerator.
2) Convection. The cold air falls down the inside of the refrigerator. This is why when you open the door the 'fog' rolls out of the bottom of the freeze across the floor. Cold air sinks, warm air rises.
2006-10-09 18:18:36 · answer #2 · answered by Arn 1 · 0⤊ 0⤋
Condensation is the by product of the process.
Conduction is used to transfer heat from the freon to the condenser and convection and radiant heat transfer are the methods used to dissipate the heat from the condenser to the open air.
2006-10-09 18:16:50 · answer #3 · answered by Josh 2 · 0⤊ 0⤋
The heat from the air is boiling off the liquid refrigerant and makes it a gas. To boil something, you need to apply heat.
The heat is taken away from the air surroundings. And thats whats makes the air cooler. Simple as that.
2006-10-09 23:13:47 · answer #4 · answered by redacatfish 2 · 0⤊ 0⤋
with an electric fan that blows over the condenser.
2006-10-09 18:22:01 · answer #5 · answered by lily 1 · 0⤊ 0⤋