[Bldg-sim] How to model floor using aluminium foil to prevent heat transfer?

Cheney chenyu73 at gmail.com
Tue Apr 12 13:53:55 PDT 2011


I doubt you are able to simulate it by using eQuest. However, it is possible
to simulate it in IES VE (I guess TAS and Energy+ can do the same thing).
Radiant floor can be simulated by 1. top concrete (e.g. 2" of concrete); 2.
radiant piping zone; 3. floor assembly below the radiant piping. For your
case, reflectivity, emiissivity (probably conductivity) should be modified
accordingly between layer 2 and 3.



LinkedIN @ http://ca.linkedin.com/pub/yu-cheney-chen/27/637/72b

On Tue, Apr 12, 2011 at 12:02 PM, Shubha Mohunta
<shubha.mohunta at gmail.com>wrote:

>  Hi,
> The building i am modeling has steel frame floor which separates the
> conditioned space from unconditioned basement. There are hot water tubes
> running underneath between the steel joists for radiant heating. There is no
> use of insulation except for v thin aluminium foil below radiant tubes which
> is fixed to the steel joists using magnets. This foil helps with high
> reflectivity and low thermal absorption prevents heat transfer to the
> unconditioned basement.
> Can somebody give me ideas how to model this ? I am using eQUEST
> Thanks,
> Regards,
> Shubha Mohunta, LEED Green Assoc.
> M.S. Sustainable Design
> Carnegie Mellon University
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