[Equest-users] Fwd: Composition of weather file data

[Joe Huang]

It's inevitable that the peak conditions will fluctuate from year to 
year, that's just the chaotic nature of the weather.  If you
use a "typical year" weather file, you will tend to get, but not 
necessarily, an average annual peak, since the months have been selected 
to best match the long-term distribution of temperatures, humidity, 
solar, wind speed, etc.

What is pre-RCx ?  "pre retro-commissioning"?  What is that?  Too many 
adjectives for me :-)

In any case, if you're modeling an existing building to assess its 
historical performance, I would definitely use actual year weather files.
As for where to find such data, there's a proliferation of sources on 
the Web, although most would require processing to turn them into 
formats required by simulation programs such as eQUEST, etc.

Joe
Joe Huang
White Box Technologies, Inc.
346 Rheem Blvd., Suite 108D
Moraga CA 94556
yjhuang at whiteboxtechnologies.com
http://weather.whiteboxtechnologies.com for simulation-ready weather data
http://www.whiteboxtechnologies.com
(o) (925)388-0265
(c) (510)928-2683
"building energy simulations at your fingertips"


On 2/11/2014 4:09 AM, Arunabha Sau wrote:
> Thanks Joe & David.
> Appreciate your explanation. It was very through.
> In an EPW file, I saw only 1990's data, so I was worried about the 
> peak if the typical years's data would be different or so! I was 
> modeling for pre-RCx. So, I was more concerned about actual (or near 
> to actual) heating/cooling load.
> For Cx modeling, do you guys make model out of these weather file or 
> make a more customized weather file from some online available weather 
> file source or buy one?
>
> Best regards,
> Aru
> /
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> /TexasAggie '10/
> /JU, Kolkata '05/
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