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

Shubha Mohunta shubha.mohunta at gmail.com
Thu Apr 14 09:40:56 PDT 2011

Thanks Cheney,

This project uses Heat pumps for cooling and radiant floors for heating. So
to model this i have used Heat pumps ( with just cooling) as my primary
system and attached baseboards to them to simulate radiant floors.

Do u think this would work?


On Tue, Apr 12, 2011 at 4:53 PM, Cheney <chenyu73 at gmail.com> wrote:

> Hi,
> 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.
> Regards,
> Cheney
> 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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