[Equest-users] 90.1 climate zone

[Gaurav Mehta]

Yuvraj,

 

Its climate zone 3B for Mexico city.

 

This is how I determined:

 

Used the EnergyPlus weather convertor (EnergyPlus v3.0) to convert epw
file to 'statistic report on input file'. This yields a .stat file that
can be opened up in any text editor. Along with other weather information
it also provides the climate type for ASHRAE 90.1-2004.

 

However, the STAT file for Mexico City on the energyplus weather data
website,  shows the climate type as 4B which is not true, provided climate
type 3 is correct in Table B-3, ASHRAE 90.1-2004. I made a check for
another location, Seattle, WA (King County)- which according to Table B-1
is 4C, however, according to the STAT file on the website, it lists its
climate type as 4A. When one uses the EnergyPlus weather converter, the
STAT file then shows the correct climate zone for Seattle as 4C.

 

I am enclosing the STAT file that I generated using the weather converter.

 

 

Gaurav Mehta, LEEDR AP

Senior Project Energy Analyst

direct: 206.462.7658

fax: 206.285.7111 

 <http://www.rushingco.com/> www.rushingco.com

 

From: equest-users-bounces at lists.onebuilding.org
[mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Yuvaraj
Saravanan
Sent: Wednesday, November 26, 2008 12:10
To: bldg-rate at lists.onebuilding.org; equest-users at lists.onebuilding.org;
bldg-sim at lists.onebuilding.org
Subject: [Equest-users] 90.1 climate zone

 

Hi All, 
I am trying to do an energy modeling using ASHRAE 90.1 performance rating
method for a building in Mexico City, Mexico. I am trying to figure out
where Mexico City would fall under for the climate zone. Table B-3 tells
me the Zone number but it does not tell me the Climate Type (A, B or C).
So, I followed the Table B-4. This does not classify between A or B for
zone 3 based on the degree days. I also went through Appendix B2 (Major
climate type definitions) page 109. I was able to climate that it is not
Climate Zone type C. But in order to verify whether I am in B, I need to
know the annual precipitation. Where do I get this value from? Will it be
in ASHRAE or any other standards? I searched in the website and I am
getting different values for Mexico city precipitation. Depending on this
I would either fall in A or B. Would like to follow some standards rather
than searching in the website. 

I am writing this story because I need to figure out whether my baseline
would require an economizer or not. Zone-3A does not require an economizer
where as Zone-3B does. 

Any guidance will be appreciated. 
Thanks, 
Yuvaraj 

______________________________________________ 
Yuvaraj Saravanan, PE 
Engineer 

Arup 
12777 West Jefferson Boulevard Suite 200 
Los Angeles CA 90066 
tel:    1 310 578 4400 
dir:    1 310 578 4521 
fax:    1 310 577 7011 
internal freecall: x20521 
yuvaraj.saravanan at arup.com
 <file:///\\www.arup.com> www.arup.com 

 

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