Thermal conductivity of copper pipe in water

10-10-20

I'm searching for the heat loss in W/m of a copper pipe in a liquid-to-liquid heat exchanger.
I've tried the net and the Engineering Toolbox, but all I can find is this:

Copper Pipes - Heat Loss
http://www.engineeringtoolbox.com/copper-pipe-heat-loss-d_19.html

and...
Convective Heat Transfer
http://www.engineeringtoolbox.com/convective-heat-transfer-d_430.html

I'm trying to simulate the performance of a simple water/water heat exchanger based on a simple immersed pipe.

Any assistance gratefully received.

drunken_munky52

First, get the thermal resistances of the water in the pipe and the surrounding medium. You will need to add those resistances to the pipe resistance.

Where the thermal resistance of the cylinder is given by:

R = ln(r2-r1)/2.pi.L.k

Where:

r2 = outer radius of pipe
r1 = inner radius
L = length of pipe
k = thermal conductivity of pipe

Once you get the total resistance, invert this figure to get the heat loss in Watts