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Mayank,<br>
<br>
The EnergyPlus Weather Converter does not calculate a DDY file, but
just looks through a file of design day data from the ASHRAE 2013
Handbook of Fundamentals. If it finds a match in the Station WMO
number, it will print the data from the HOF in the EnergyPlus IDF
format as a DDY file; if not, it will return a blank DDY file as in
your situation.<br>
<br>
The procedure used by ASHRAE to calculate design day conditions is
explained in the ASHRAE Handbook of Fundamentals, but you will need
a time series of at least 8 years, and preferably 12 years or more
of historical weather data. Please note that when I generate
typical-year weather files, such as the IWEC2 for ASHRAE or the 61
Indian weather files for ISHRAE, at the same time I also calculate
the design day conditions following the ASHRAE procedure, and print
out the DDY files. If you tell me the location of your weather
file, I can see what I have that's closest in my data base of DDY
files.<br>
<br>
Joe<br>
<pre class="moz-signature" cols="90">Joe Huang
White Box Technologies, Inc.
346 Rheem Blvd., Suite 205A
Moraga CA 94556
<a class="moz-txt-link-abbreviated" href="mailto:yjhuang@whiteboxtechnologies.com">yjhuang@whiteboxtechnologies.com</a>
<a class="moz-txt-link-freetext" href="http://weather.whiteboxtechnologies.com">http://weather.whiteboxtechnologies.com</a> for simulation-ready weather data
(o) (925)388-0265
(c) (510)928-2683
"building energy simulations at your fingertips"
</pre>
<div class="moz-cite-prefix">On 10/18/2015 9:20 PM, Mayank Bhatnagar
wrote:<br>
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<div>Dear All,<br>
<br>
</div>
I am simulating for locations that are not in the
energyplus weather database. I have EPW files. For
simulation in energyplus, I need to define design days.
I was trying to generate the DDY file with energyplus
weather converter but the converted DDY file only contains
Site:Location. <br>
<br>
Please let me know whether there is any methodology to
estimate design days.<br>
<br>
</div>
Thank you.<br>
<br>
</div>
Regards,<br>
<br>
</div>
Mayank Bhatnagar <br>
</div>
<br>
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