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RE: [EnergyPlus_Support] Question on Building North and actual north.
Shantanu,
The north axis field is not always active. If you use World Coordinate System to describe vertices then it has no effect. But if you use a Relative coordinate system then it adjusts the overall rotation of the building. If you were using relative coordinates then it sounds like you could use -30 in this field. But it is easy to get confused, so the best thing to do is output and check the DXF image to make sure the orientation is coming out the way you expect. I prefer to use Relative coordinates so that I can easily alter the building rotation using this field without changing the surfaces.
Brent
-----Original Message-----
From: Shantanu P [mailto:shanky217@xxxxxxxxxxx]
Sent: Thursday, March 31, 2005 10:04 AM
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Subject: [EnergyPlus_Support] Question on Building North and actual north.
Hi all,
This question is regarding the Building input. In the input field I see
there is one entry which says Field north axis to be specified. What is
meant by the field north axis? Suppose we have a building whose north wall
is at an angle of 30 degrees with horizontal (East-west). So the wall normal
would be at an angle of 30 degrees with actual North axis. Is this the angle
meant by field north axis? If that is actually the field angle, what is the
need for specifying the angle, when the vertices are specified in the
surface geometry (Assuming that the co-ordinates are fixed as East-west and
North south).
Thanks for clarification.
Shantanu
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