FW: [EnergyPlus_Support] Daylighting Map: Strange dates & other related

["Crawley, Drury" <Drury.Crawley@xxxxxxxxxx>]

Abeer,
 
Which weather file were you using?  That may explain the strange dates.
 
Dru

________________________________

From: EnergyPlus_Support@xxxxxxxxxxxxxxx
[mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx] On Behalf Of Ellis, Peter
Sent: Friday, August 03, 2007 2:12 PM
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Subject: RE: [EnergyPlus_Support] Daylighting Map: Strange dates & other
related





Hi Abeer,

The illuminance map does report the year. I think the years you are
seeing are coming directly from the weather file. Remember that a TMY2
weather file is made up of "typical" months pulled from many different
years to make one "typical" year. (Someone else on the list might have
a reference for the full details on how TMY2's are prepared, or I'm sure
you could google it pretty easily.) 

To verify this is the case, change the extension on your "in.epw" to
"in.csv" so that you can open it in Excel (because the weather file is
just text). The first column is the year; second is the month; third is
the day. Scroll down through several months and you should see the
years that match the dates in your illuminance maps. If not, then do
upload your files. 

P

________________________________

From: EnergyPlus_Support@xxxxxxxxxxxxxxx
<mailto:EnergyPlus_Support%40yahoogroups.com> 
[mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx
<mailto:EnergyPlus_Support%40yahoogroups.com> ] On Behalf Of Abeer M.
Eisa
Sent: Thursday, August 02, 2007 11:46 PM
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
<mailto:EnergyPlus_Support%40yahoogroups.com> 
Subject: Re: [EnergyPlus_Support] Daylighting Map: Strange dates & other
related

Hi Linda,
Thank you for your reply, but the illuminance map did gave me date&
time: like 01/12/1931 16:00:00, so many different years!
Thanks, Regards
Abeer

Linda Lawrie <linda@xxxxxxxxxx <mailto:linda%40lawrie.com>
<mailto:linda%40lawrie.com> > wrote:
Illuminance map files do not have years on them, just mon/day and time:
01/21 
08:00,x=0.10,x=0.76,x=1.41,x=2.07,x=2.72,x=3.38,x=4.03,x=4.69,x=5.34,x=6
.00

I don't know what happens if you are using a different regional date 
system but the above it what the date lines in the map should look like.

You cannot get map values as annual or monthly averages. You'd need 
to look up the documentation for your other question though I believe 
it will be limited to the hours when the sun is up.

At 03:56 PM 8/2/2007, Abeer M. Eisa wrote:
> - Illuminance values are recorded only for available daylighting 
> inside the zone? or for which hours?
> - Is it possible to get the map as annual or monthly averages?

Linda

EnergyPlus WebSite: http://www.energyplus.gov
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Member: EnergyPlus Development Team

[Non-text portions of this message have been removed]

Abeer M. Eisa
Visiting Scholar
School of Architecture
University of Sheffield
Western Bank
Sheffield S10 2TN, UK
tel. 0114 2220372 , Mob. 0789 44 69159

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Pinpoint customers who are looking for what you sell. 

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