Re: [TRNSYS-users] pane temperature is diverting

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

Michael,
  I ran into this one time when I was working with a controlled
natural ventilation system and ended up having to turn off the automatic
calculation of the internal convection heat transfer coefficient on the
window pane. I used Type80 instead (an external version of the same
algorithm as I understand) and I delayed the pane temperatures by one
time step (five minute time steps) so as to get some effect of the
changing temperature.
Kind regards,
 David


At 08:17 4/1/2007, Hartl Michael wrote:

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Hello TRNSYS-Users,
 
I am modelling a multizone building connected with a simple radiator model and a heat pump!
 
Outputs of the radiator model are the convective and the radiative power emitted. I connected these outputs to Type 56 as zone gains.
 
Basically that works fine but as soon as I try to control the room temperature, e.g. with a thermostat, the pane tmperatures of certain surfaces of the building are diverting.
 
I guess the problem is that under certain conditions, like the heat pump is turned on and off very often and quick, the pane temperatures can't be properly calculated in one time step . May be there is a possibilty to change the tolerances anyhow??
 
Every suggestion would be helpful!
 
Thanks in advance,
Michael
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