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Re: [TRNSYS-users] suspended ceilings
Jörg,
If there is a large plenum space above the suspended ceiling and
particularly if the plenum extends over more than one thermal zone, the
approach that I have often used is to define the plenum as a separate
thermal zone and model the suspended ceiling as a "resistance only"
layer separating the actual zone from the plenum zone. I think that if
you add an air layer as part of your wall, you are assuming that the air
is stagnant; stagnant air is a very good thermal insulator. If the space
between the suspended ceiling and the concrete is thick (even only as
thick as 30cm or so) then the air in it is not going to be stagnant at
all and so therefore won't be as good an insulator as it is getting
credit for being.
Kind regards,
David
On 8/16/2011 04:22, Jörg Braasch wrote:
Hello,
I want to simulate a building with suspended ceilings. To do this I
will ad the layer of the suspended ceiling and a layer of air to the
concrete ceiling. I also substract the volume between the ceiling from
the volume of the room.
Does anyone have experience in simulating with suspended ceilings? I
am not sure if I can do it this way.
Thanks
Regards
Joerg
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David BRADLEY
Principal
Thermal Energy Systems Specialists, LLC
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