Extreme Weather Data

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Good morning to all...

I have gone through what feels like every page of the ASHRAE Handbook of
Fundamentals in search of "N=20" and N=50" extreme high temperature
data. I was told it was in the Handbook, but I cannot find it and I
have spent the better part of two hours looking for it. Numerous web
searches have not yielded any results either. If anyone is willing to
help with this, I would very much appreciate it. The job is for a data
center, and they need the N=20 (described as a twenty year high
temperature) and the N=50 (described as a fifty year high temperature)
for design.

Any ideas? Anybody?

Thanks!

--
Robert P. Wichert P.Eng. LEED AP
CEPE CEA HERS I/II BPI BA
+1 916 966 9060
FAX +1 916 966 9068

RobertWichert's picture
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Can't help you on the ASHRAE version of the data, but I'll bet Weather
Analytics has something. THey seem to be a major weather data repository.
Another possibility is Joe Huang at White box, who is a weather wizard.

James V Dirkes II, PE's picture
Joined: 2011-10-02
Reputation: 203

The weather data PDFs on the Fundamentals CD (packaged with the print
volume) includes 20 and 50 year return period extreme dry bulb temps.
On the CD, look in the folder DATA_TABLES_FOR_STATIONS folder. There is
also a map-based station finder.

A wealth of additional info can be derived with the WDView 5.0 product
sold by the ASHRAE Bookstore. Everyone should have a copy of that.

Chip Barnaby

------ Original Message ------

Chip Barnaby2's picture
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The extreme values (n=5,10,20,50) are also present in the Energy Plus Weather (EPW) files at http://apps1.eere.energy.gov/buildings/energyplus/weatherdata_about.cfm). If you don't use EPW files regularly you might need to read the file definition
(http://apps1.eere.energy.gov/buildings/energyplus/pdfs/weatherdatainformation.pdf )

Paul Riemer, PE, LEED AP BD+C
DUNHAM

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Thanks Paul,

I got on the site, but all it gives me are the TMY weather files in zip
format. That's great, and I have used those before, but the N=20 and
N=50 data do not jump out at me. I opened the EPW file with Energy
Consultant, but N=20 & N=50 don't seem to be part of the package. I
opened the .ddy and .stat files with Notepad, and I still don't see the
N=20 and N=50 data easily available.

So I'm doing something wrong.

Any help would be great.

I did buy the WDView product from ASHRAE, Chip. It's on the way!

--
Robert P. Wichert P.Eng. LEED AP
CEPE CEA HERS I/II BPI BA
+1 916 966 9060
FAX +1 916 966 9068

===========================

RobertWichert's picture
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Reputation: 201

The increasing availability of historical time series from various
sources makes it quite easy to extract the extreme high temperature for
a time series. For example, NCDC's ISD (Integrated Surface Hourly
Database) has time series for around 1,000 locations in the US that go
back 30 years, and maybe 200 or so that go back even more. There's also
NREL's National Solar Radiation Database (NSRDB) 1961-1990, updated
1991-2010. I know Version 1 also has temperature data, don't know about
Version 2.

Since I have already processed the ISD for the whole world, if you tell
me the location, I can get you the 20 year extreme (at no charge) just
to show how easy that is.

Joe

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
http://www.whiteboxtechnologies.com
(o) (925)388-0265
(c) (510)928-2683
"building energy simulations at your fingertips"

Joe Huang's picture
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Its in Chapter 14 of the 2013 Fundamentals. You can see an example in
Table 1, page 14.2. Third section is Extreme Annual Design Conditions with
min/max extremes for N=5, 10, 20, and 50 years.

For your specific location, you'll have to open up the CD-ROM that comes
with the Handbook. The data in the Appendix (pages 14.19--> ) is a subset
of what can be found for each individual location on the CD-ROM.

Drury B Crawley's picture
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OK, since this is to show how easy it is...

Dallas Fort Worth Airport.

And thanks a Billion!

--
Robert P. Wichert P.Eng. LEED AP
CEPE CEA HERS I/II BPI BA
+1 916 966 9060
FAX +1 916 966 9068

=============

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