[TRNSYS-users] Boundary wall

[Ayman Sarwa]

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
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Best Regadrs
Eng. Ayman  Mohamed
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