Thermally Conducting Polymer Tubing

I would try those guys that build the floor heating systems they use some kind of plastic tubing in the floors, seems to last forever.

Thanks I'll give it a try.

Try http://www.usplastic.com/catalog/default.asp

They have tubing and also online technical assistance

What do you mean with "Thermally Conductive"?

Typical plastics hace a thermal conductivity between .04 and 0.5

Higher numbers are called thermal conductive polymers.

Stainless steel has a K value of opprox 16. Carbon steel is approx 55 W/mK

Aluminium goes up to 200 where copper reaches 400.

You want a polymer for the fluid and the thermal conductivity for a cooling/heatup application?

solution: use sandwich pipes, they have a polymer inner liner with metal outside wall.

The thermal conductive paste that is used in electronic applicaiton have a conductivity between 1 and 5. Their main efficiency comes from the removal of the air gaps between the faces.