[no subject]

[Sounghun Yun <aquila@xxxxxxxxxxxxxxxxxxxxxxxxxxxxx>]

Hi, every trnsys users.

I found some trouble from the result of Comis/Trnsys coupling
calculation when there were severe indoor-outdoor temperature
differences.  That is, when the indoor-outdoor temperature
difference changed for a time step (changing about 3 or 5 degree
  C for 1 hr), the amount of infiltration of building falling
down unreasonably.  Generally speaking, if there was no wind
around a building, the amount of infiltration of a building
should have to be the smallest value when the indoor-outdoor
temperature differences become zero.  And, I confirmed this like
  result from the calculation of Comis stand-alone (single zonal
mode and multi zonal model, too).
Indeed, I handled the weather data to be no wind speed and the
outdoor temperature should be changed step by step (for eg., 15
degree C for 12 hours and 20 degree C for the next 12 hours, etc.
   And the indoor temperature is set to 20 degree C) for the
purpose of finding some clue.  And the unreasonable value was
found at the time when the temperature difference changed.  I
have one more question in here ; why the output data is
interpolated even though Type9 was set not to interpolate any
input value(I entered "-1" for the setting of interpolation)?
The problem was occurred at the time step of interpolation.
When I set the simulation time step of control cards to be
smaller(for eg. 10 minute), the results showing better than
large time step(1hr).  Is there any relationship between the
time step and Trnsys-Comis coupling?

Any one who has good idea about these problems, teach me please..

Best regards

****************************************************************
below : an example

     Tin(C) Tout(C) infiltraion(m3/h)
3:00   20     10        40
4:00   20     10        40
5:00   20    12.5        6    <-- I entered 10 degree C for 5:00
6:00   20     15        30
7:00   20     15        30

****************************************************************