A few College questions

[heinz57]

1) a
2) a
3) c
4) c
5) b

 

[WHPES]

Here's an interesting calculation I remember from college - how to calculate the heat loss from different diameter copper pipes.

Heat transfer coefficient - Wikipedia, the free encyclopedia


The equation here is how you work out the rate of heat transfer for the copper tube within the cylinder and hence determine what overall length it must be for a certain rate of heat transfer (in watts). To work out in BTU, divide by 3.414 :

Heat transfer coefficient - Wikipedia, the free encyclopedia

You can also use the same equation to calculate heat losses from insulated and uninsulated pipe.