[TRNSYS-users] Boundary wall

[Ayman Sarwa]

Thanks David 
 
But , what is the importance or function of Tground as an Input in Type 56 ?

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>
>Best Regadrs
>Eng. Ayman  Mohamed
>
>

________________________________
From: David BRADLEY <d.bradley at tess-inc.com>
To: Ayman Sarwa <aymaneldakhl at yahoo.com>
Cc: "trnsys-users at cae.wisc.edu" <trnsys-users at cae.wisc.edu>
Sent: Friday, August 5, 2011 10:44 PM
Subject: Re: [TRNSYS-users] Boundary wall


Ayman,
  I am not sure that I follow quite what you are doing. If your
    floor is defined as a BOUNDARY and the back side temperature is set
    to identical then that defines an air temperature on the other side
    of the floor as being identical to the air temperature of your zone.
    You can't then define the back side temperature as a ground
    temperature; that would doubly define the temperature on the other
    side of the floor. 

Best,
 David

On 8/5/2011 09:50, Ayman Sarwa wrote: 
I am simulating single zone by Trnbuild and Trnsys 17, I define the floor as boundary and select boundary as identical when I read  the energy from inside surf. of floor conv.  to air and longwave radiation to other surfaces = NTYPE19 the QCOMI of floor, and Temp. of inside floor, I note that, 
>for all cases when I define the ground Temp i.e Input of type 56 by type 77 (ground temp ) or by const value , the QCOMI always keeps +ve while T sur_in < T zone, i.e the energy transfer from air zone to floor  , but  QCOMI  must be -ve, Why ?
>Any one can help me to Know what is happen ?
>thanks
>------
>
>Best Regadrs
>Eng. Ayman  Mohamed
>
>
>
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-- 
***************************
David BRADLEY
Principal
Thermal Energy Systems Specialists, LLC
22 North Carroll Street - suite 370
Madison, WI  53703 USA P:+1.608.274.2577
F:+1.608.278.1475 d.bradley at tess-inc.com http://www.tess-inc.com http://www.trnsys.com
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