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Originally Posted by stev
That will work if the short run cooling loop was pressurized above 8psi. It would take many years before the tubing would collapse.
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what do you mean stev ?
I have many years of experience with flexible plastic tubing, all sealed at atmospheric pressure.
None at anything close to 8 psi.
The transpiration is a consequence of the (relative) humidity difference across the wall. (No losses if both sides of the tubing are in the fluid.)
It does certainly not take many years for the tubing to collapse; I can do it in the lab, and have done so.
If the tubing is thicker or of a less permeable material it will be slower, but it will occur with unsupported tubing.
Hence Coolsleeves to retard the effect.