Hello

I am new to this forum and I have (as you can probably tell) no idea about refrigeration. My question is actually only remotely related as far as I can tell, but I thought you guys might have to calculate pressure drop on copper tubing cooling coils so I'll just try my luck and ask here.

I am building a prototype tank filled with a fluid. This tank is cooled by a copper cooling coil filled with circulating water. They have done all the calculations, so basically I need to build it and make sure I don't run into a problem with my water pump, water cooling tower etc.

I wouldn't be too worried if it's just one tank, but I am connecting a couple of them so I definitely need your help.

What I know is:

- 10mm copper tubing (seems to be about 3/4")
- length of tube about 770mm
- I plan to make a coil with a diameter of around 70mm, so basically I just wrap it around a 1 1/2" steel pipe
- To get to the 770mm length, I need about 35 rounds
- (in case that matters: I need a flow rate of about 5 liters/minute and water in temp of 35°C)

Any idea how I calculate the pressure drop for such a cooling coil?

(Unfortunately I am at a location (in SE Asia) where I don't have any local specialists to talk to.

Thanks for your help in advance!

This is how it should look like:
kuehler.jpg