[Bldg-sim] Test your knowledge of simulation weather file formats Part 2: the EnergyPlus *.epw format

Joe Huang yjhuang at whiteboxtechnologies.com
Thu Dec 14 00:47:48 PST 2017

Since the only response I've received so far was from a professor to indicate he's busy 
with finals week, I've decided to delay posting the answer until Monday.


Joe Huang
White Box Technologies, Inc.
346 Rheem Blvd., Suite 205A
Moraga CA 94556
yjhuang at whiteboxtechnologies.com
http://weather.whiteboxtechnologies.com for simulation-ready weather data
(o) (925)388-0265
(c) (510)928-2683
"building energy simulations at your fingertips"

On 12/12/2017 10:26 PM, Joe Huang wrote:
> This is the second of several posts regarding the nitty-gritty of commonly-used weather 
> file formats.  Like the post last week about the DOE-2 *.bin format, I've structured 
> this post as a small contest testing  your familiarity with weather file formats or at 
> least visual acumen about weather data.
> The second weather file format I'm putting under the microscope is the EnergyPlus *.epw 
> format.  Since the *.epw format is a text file, the data are readily observable, so 
> there's no lead to provide a report of the data or explain the packing procedure as was 
> done for the *.bin file last week.
> I've attached with this post an epw file for Leignica Poland downloaded from the 
> Climate.OneBuilding.Org web site.  The selection of that weather file was almost 
> entirely random, but its provenance being converted to an epw from a non-US weather file 
> meets my only criteria for selection that I'll explain after the contest.   As in last 
> week's contest, the intent is not to pick on isolated quirks in the data, but look for 
> more systemic issues that are common to a data format or conversion process. As before, 
> I challenge you to find three things  in this hourly file that are unusual or 
> questionable. Hint: check the almanac for the time of sunrise and sunset.
> You should send your answers to me via e-mail. Please don't post them on the Web as that 
> might give away the answer to others.  The first five persons to get the right answers 
> will get a free weather file of whatever type (typical year or historical year) that 
> available on the White Box Technologies web site.
> I will announce the results on Thursday.
> Attachment:

More information about the Bldg-sim mailing list