[TRNSYS-users] sloping surfaces

[Marcus.Joppich]

Hello David,

thank you for your answer. I´ve tried it. The following steps were performed:

I defined 6 orientations of walls to external: Northwest (Wall to external)/ Southeast (Wall to external)/ Northeast (Wall to external)/ Northwest with a slope of 37 degrees (sloping roof)/ Southeast with a slope of 37 degrees (sloping roof)/ Northeast with a slope of 37 degrees (sloping roof).

At Type109 I defined 6 surfaces with the following parameters:
Surface1/Slope of surface 0/Azimuth of surface 225
Surface2/Slope of surface 0/Azimuth of surface 135
Surface3/Slope of surface 0/Azimuth of surface 315
Surface4/Slope of surface 37/Azimuth of surface 225
Surface5/Slope of surface 37/Azimuth of surface 135
Surface6/Slope of surface 37/Azimuth of surface 315

Then I connected the outputs with the inputs by Type56.

Is it the right way?

I get a fatal error: "Error in automatic heat transfer calculation  for surface   1 or its adjacent surface!: Automatic heat transfer calculation is only allowed on surfaces within a zone.  Please check building input file (.bui)", but I think it has a different reason.
Thank you for your help.

Regards, Marcus



Von: David BRADLEY [mailto:d.bradley at tess-inc.com]
Gesendet: Mittwoch, 20. Juli 2011 19:12
An: Marcus.Joppich
Cc: trnsys-users at cae.wisc.edu
Betreff: Re: [TRNSYS-users] sloping surfaces

Marcus,
 It depends somewhat on what component you are using to model the attic. However, almost without exception, you need to define the slope and azimuth of the attic roof surfaces in your weather component (Type15 probably) and then pass the appropriate solar radiation outputs from that component to the appropriate inputs of your building component.
Regards,
 David


On 7/20/2011 06:57, Marcus.Joppich wrote:
Hello TRNSYS-users,

I try to simulate few rooms in an attic. I don´t understand how I can describe a sloping surface (like a sloping roof) with TRNSYS. Maybe you can help me.

Thanks for your time.

Marcus





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