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Re: [TRNSYS-users] Boundary wall

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

------
Best Regadrs
Eng. Ayman  Mohamed

From: David BRADLEY <d.bradley@tess-inc.com>
To: Ayman Sarwa <aymaneldakhl@yahoo.com>
Cc: "trnsys-users@cae.wisc.edu" <trnsys-users@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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