Hello to everyone, first post on these forums.
I have the following problem/question, im somewhat sure how to approach it but i'd like to double check if im going at it the correct way.
The problem is figuring the time it would take to freeze a body of water. Lets say we have a copper mold in the shape of a cube with a volume of 1 cubic decimeter, so 1 liter of water, the top of the square is removed so ice can be extracted. We have a compressor that produces 100W of power and operates on ethylene glycol - antifreeze.
How would you go about solving this problem, which physical properties do i require?
What im loosely thinking :
a) figure out the ammount of energy you need to remove from the body of water for it to become ice - for the sake of the problem lets say that the initial temperature is 20°C and that the final ice temperature is -5°C.
b) figure out the surface over which heat exchange will occur - that includes the surface area of the cube and surface area of the compressor pipes
c) input all the information into the P=W/t formula to get the time.
Thoughts/suggestions?
I have the following problem/question, im somewhat sure how to approach it but i'd like to double check if im going at it the correct way.
The problem is figuring the time it would take to freeze a body of water. Lets say we have a copper mold in the shape of a cube with a volume of 1 cubic decimeter, so 1 liter of water, the top of the square is removed so ice can be extracted. We have a compressor that produces 100W of power and operates on ethylene glycol - antifreeze.
How would you go about solving this problem, which physical properties do i require?
What im loosely thinking :
a) figure out the ammount of energy you need to remove from the body of water for it to become ice - for the sake of the problem lets say that the initial temperature is 20°C and that the final ice temperature is -5°C.
b) figure out the surface over which heat exchange will occur - that includes the surface area of the cube and surface area of the compressor pipes
c) input all the information into the P=W/t formula to get the time.
Thoughts/suggestions?