# [BLDG-SIM] Determining extreme hot weather.

Jeff Haberl jhaberl at esl.tamu.edu
Fri Jan 3 09:59:59 PST 2003

```Hello:

Good question.

The old "solair" calculation used to account for
solar and temperature. Perhaps an "solenthalpy" index
might work. Also, don't forget that heat builds up over
a several day period, so you might want to add thermal mass
to the expression. This would, of course, depend upon
the amount of ventilation, and/or solar exposure that
the building has, therefore it is building-specific. For
buildings with ground-coupling, this comes into the expression
as well.

We are looking at similar issues to determine the peak
day for NOx reductions from electricity use in buildings
in Texas. In our work we have a "standard" building that
represents various chapters of the 2000 IECC, which is
then run against the weather tape.

Jeff

8=!   8=)  :=)   8=)   ;=)   8=)   8=(   8=)   8=()   8=)   8=|   8=)   :=')
8=)   8=)   8=?

Jeff S. Haberl, Ph.D., P.E.............................jhaberl at esl.tamu.edu
Associate Professor....................................Office Ph:
979-845-6507
Department of Architecture...........................Lab Ph: 979-845-6065
Energy Systems Laboratory...........................FAX: 979-862-2457
Texas A&M University..................................77843-3581
College Station, Texas, USA...........................URL: www-esl.tamu.edu

8=/   8=)  :=)   8=)  ;=)   8=)   8=()   8=)   :=)   8=)   8=!   8=)   8=?
8=)   8=)   8=0

-----Original Message-----
From: postman at gard.com [mailto:postman at gard.com]On Behalf Of Lopez,
Phylroy
Sent: Friday, January 03, 2003 10:50 AM
To: BLDG-SIM at gard.com
Subject: [BLDG-SIM] Determining extreme hot weather.

Hello Group...

I'm in the process of putting together a thermal active cooling simulation
model to be used in residential buildings. I need to run it against extreme
hot weather data. the problem is this.

*-I have weather data spanning 10 years for a given location.

*-I need to determine the hottest month or week that will produce the

What criteria should I look for as the load is based not only on dry bulb
temp but also humidity and solar.

Is there any sort of CoolingLoad factor algorithm that takes all of these
into account when sizing cooling systems? Is there a common weighting factor
used?

CoolingLoadFactor(SolarGains, DryBulbTemp, Humidity,... ?) = ?

I''l need a criteria to create a program to parse the weather data
to get my extreme week/month.

Phyl

======================================================
You received this e-mail because you are subscribed
to the BLDG-SIM at GARD.COM mailing list.  To unsubscribe
from this mailing list send a blank message to
BLDG-SIM-UNSUBSCRIBE at GARD.COM

======================================================
You received this e-mail because you are subscribed
to the BLDG-SIM at GARD.COM mailing list.  To unsubscribe
from this mailing list send a blank message to
BLDG-SIM-UNSUBSCRIBE at GARD.COM

```