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RE: [EnergyPlus_Support] Strange Sort of Error
Ali, I've looked at your file and have some recommendations for you. First of all, remove all of the DAYLIGHTING:ILLUMINANCE MAP objects from your file. (This will allow the DXF file, eplusout.dxf, to be generated. I don't know why that error message is preventing the DXF from being generated.) Now look closely at you DXF file using Volo View or something similar. You'll see that most of your daylighting reference points (the red and blue circles) are not in their correct zones. They are, in fact, outside of the building. This is the first thing you must fix before you can get the maps to work.
The reason the reference points are misplaced is because you are trying to use world coordinates instead of zone coordinates. All daylighting reference point coordinates (and also illuminance map coordinates) must use zone coordinates. In zone coordinates, everything is relative to the zone origin, which is defined in the ZONE object. This means that you should never have daylighting coordinates less than zero, or else they will be outside the zone. A Relative North Axis other than zero further complicates things.
Once you get the daylighting reference points in the right places you should have a better understanding of how the illuminance map coordinates should be setup. However, since your "X minimum coordinate" and "Y minimum coordinate" are still less than 0.15, you run the risk of getting the same error message if there is a window in the walls on those sides. Try 0.2 instead to be safe.
When you temporarily remove the DAYLIGHTING:ILLUMINANCE MAP objects as I suggest above, you'll see that you have some new errors with your zone equipment. You'll have to solve those errors separately.
Peter Ellis
NREL
-----Original Message-----
From: Linda Lawrie [mailto:linda@xxxxxxxxxx]
Sent: Monday, April 18, 2005 8:50 AM
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Subject: Re: [EnergyPlus_Support] Strange Sort of Error
Personally, I would probably try commenting out the illuminance map for that zone if you can't figure out the problem there.
The developer was out of town for the last few days of last week.
Linda
At 08:38 AM 4/18/2005, Ali_Ajmi wrote:
Waiting your help Linda.
Ali
Ali_Ajmi <ajmi70kw@xxxxxxxxxxx> wrote:
The illuminance maps used in this file from the beginning. This error appear after i have removed the Geometry Transform object. This the first time i try to use the illuminance maps.
Ali
Linda Lawrie
wrote:
This is now the error I am getting. Have you used Illuminance maps
before? I will try to have the author look at the problem.
Linda
At 04:34 AM 4/12/2005, Ali_Ajmi wrote:
>** Severe ** Daylighting calculation cannot be done for zone ZONE WEST
>because an illuminance map point is less than 0.15m (6") from window plane
>ZONE WEST WINDOW
> ** ~~~ ** This is too close; check boundaries of illuminance map.
> ** Fatal ** Program terminates due to preceding condition.
>
>I have used the same Cartesian that i used in defining the zones, so the
>west zone have negative value in the Y-axis. Do you think this is the
>source of the errors.
>
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