Re: [TRNSYS-users] Boundary wall

[David BRADLEY <d.bradley@tess-inc.com>]

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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