[TRNSYS-users] Modelling radiant heating panels with chilled ceiling-model?

[Marina Stegelmeier]

Hello everyone,
I'm currently working with the chilled ceiling model in Type 56. The 
thing is only that I want to operate the radiant panels in heating mode 
and not for cooling. In the layer definition I have to specify the 
specific norm power and massflow. I'm wondering how the model knows if 
the model is operated for heating or cooling applications, except from 
the inlet temperature I adjust in the "chilled ceiling 
specification"-window (from wall-list)? Since the specific norm power is 
defined for both heating (over temperature 55 K) and cooling operation 
(over temperature 8 K) in producer data sheets I don't really understand 
which value is expected here. I suppose it's the cooling power since the 
model is designed for cooling applications and then the heat transfer is 
calculated according to the inlet conditions in the panels. But do I 
still get correct results then? Or is the chilled ceiling model even the 
right way to model heated ceiling panels? There is still Type1231 from 
Tess-HVAC-Library...

I would really appreciate any comments or similar experience! Thanks in 
advance!
Marina Stegelmeier

-- 
Marina Stegelmeier, Dipl.- Ing.
Technische Universität Hamburg-Harburg
Institut für Umwelttechnik und Energiewirtschaft
Eißendorfer Straße 40
21073 Hamburg
Raum 1.016, Gebäude D
Internet: www.tuhh.de/iue
Telefon: 040/42878-4547
Fax: 040/42878-2315