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Michael,<br>
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.<br>
Kind regards,<br>
David<br><br>
<br>
At 08:17 4/1/2007, Hartl Michael wrote:<br>
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<font face="arial" size=2>Hello TRNSYS-Users,<br>
</font> <br>
<font face="arial" size=2>I am modelling a multizone building connected
with a simple radiator model and a heat pump!<br>
</font> <br>
<font face="arial" size=2>Outputs of the radiator model are the
convective and the radiative power emitted. I connected these outputs to
Type 56 as zone gains.<br>
</font> <br>
<font face="arial" size=2>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.<br>
</font> <br>
<font face="arial" size=2>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??<br>
</font> <br>
<font face="arial" size=2>Every suggestion would be helpful!<br>
</font> <br>
<font face="arial" size=2>Thanks in advance,<br>
Michael<br>
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