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I haven't seen a reply yet to this, so here goes . . .<br>
<br>
The oldest ASHRAE handbook on my shelf is a 1972 HOF (thanks Bob
H.!). Chapter 33 is Weather Data and Design Conditions. The
reference list includes these two primary sources:<br>
<br>
Evaluated Weather Data For Cooling Equipment Design, Addendum No. 1,
Summer and Winter Data (Fluor Products Company, Santa Rosa, Calif.,
1964).<br>
and<br>
Engineering Weather Data (Army, Navy, and Air Force Manual TM 5-785,
1963).<br>
<br>
You can buy a copy of the 1958 edition of Evaluated Weather Data on
amazon<br>
<a
href="https://www.amazon.com/Evaluated-Weather-Cooling-Equipment-Design/dp/B000HDSNFY">https://www.amazon.com/Evaluated-Weather-Cooling-Equipment-Design/dp/B000HDSNFY</a><br>
<br>
I bet someone out there has a copy of the Engineering Weather Data
manual on a shelf. Some quick searching leads to this later online
version.<br>
<a
href="http://web.utk.edu/~archinfo/EcoDesign/escurriculum/weather_data/weather_data_summ.html">http://web.utk.edu/~archinfo/EcoDesign/escurriculum/weather_data/weather_data_summ.html</a><br>
which says:<br>
<br>
"The Engineering Weather Data (EWD) and other products were
developed by the Air Force Combat Climatology Center (AFCCC). Data
is provided for approximately 800 stations worldwide. Intended to
support design and construction of DOD facilities, the format is
slanted toward professional engineers, but could have numerous other
uses. "<br>
<br>
Searching AFCCC leads here to a fascinating history.<br>
<a href="https://www.airweaassn.org/Library/afwa/history.html">https://www.airweaassn.org/Library/afwa/history.html</a><br>
<br>
"The mission of AFCCC is one of military applied climatology. We
collect, maintain, and apply worldwide weather data, creating
climatological products to strengthen the combat capability of
America's warfighters. AFCCC's support to America's warfighters has
a long history."<br>
<br>
And a fitting excerpt on the 75th anniversary of D-Day:<br>
<br>
"There was probably no WWII operation, major or minor, that did not
include climatological input. The planning for every landing,
mission, and offensive, including the D-Day invasion in 1944 and the
atomic bombing of Japan, required extensive climatological
preparation and analyses."<br>
<br>
So, Chris, your impression appears correct. Weather data statistics
were motivated by military requirements (for better or worse), and
marketing cooling equipment.<br>
<br>
Mike<br>
<br>
p.s. The pages from the 1972 HOF are included in a digitized NBSLD
manual (one of the great mother programs of building simulation),
pdf p. 287ff.<br>
<a
href="https://www.govinfo.gov/content/pkg/GOVPUB-C13-9bcc6856169c63cf2c5ab81af189bd75/pdf/GOVPUB-C13-9bcc6856169c63cf2c5ab81af189bd75.pdf">https://www.govinfo.gov/content/pkg/GOVPUB-C13-9bcc6856169c63cf2c5ab81af189bd75/pdf/GOVPUB-C13-9bcc6856169c63cf2c5ab81af189bd75.pdf</a><br>
<br>
<br>
<br>
<div class="moz-cite-prefix">On 5/20/2019 4:16 AM, Chris Yates via
Bldg-sim wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CAOQXAFCy50s2xub3gFm_bMAXnFiH1HFXczVt800wYaiEgExJkA@mail.gmail.com">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<div dir="ltr">Hi All
<div><br>
</div>
<div>Does anybody have any interesting background on the sources
of (and motivations for calculating) the outdoor design
conditions now available in ASHRAE HOF?</div>
<div><br>
</div>
<div>My impression is that it was possibly derived for the
purposes of keeping B52's and allied v-bombers ready for
action at a moment's notice.</div>
<div><br>
</div>
<div>Cheers</div>
<div><br>
</div>
<div>Chris</div>
</div>
<br>
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