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why plastic pipes are used in radiant cooling system

asked 2015-05-03 00:32:49 -0500

roy gravatar image

updated 2017-05-09 10:08:54 -0500

as we have to achieve max heat transfer in radiant cooling system so why plastic pipes are used in radiant cooling system

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answered 2015-07-24 15:25:49 -0500

I'd say first that this isn't really the appropriate spot for this question, unless, for example, it's about how to enter thermal properties of plastic into EnergyPlus for use in thermal calculations. :-)

But I think to answer your question, it has to do with safety/pressure guidelines, the lifetime of the material, and as with most all decisions, material cost.

Editorial note: I imagine that the plastic might actually help in at least one facet of the thermal behavior of the system. If the pipe was extremely conductive, it is possible that the fluid would radially conduct a significant amount of heat in a very short length of the pipe, reducing the uniformity of the system across the entire floor/wall/ceiling. Having plastic may help dampen the heat transfer in the system to spread out the heat transfer over the entire surface.

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the actual material is cross linked polyethylene. There were graphs circulated that said the material would last 100 years. However the pipe hadn't been in production for more than 30 years, so how could the company provide a 100 year guarantee? we will find out in about 60 years. the first radiant floor slabs had steel and copper pipes, but as you can gather from todays market PEX has the market.

simmonds gravatar image simmonds  ( 2017-01-18 20:11:01 -0500 )edit

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Asked: 2015-05-03 00:32:49 -0500

Seen: 273 times

Last updated: Jul 24 '15