[Bldg-sim] Infiltration baseline for modeling

[Tariq Abbas]

Dear Paul,
 
I was very interested by your email and want to enquire whether, in the
TRANE model, they define a fixed assumption of air leakage rate for the
baseline building. 
 
If so, would you know what that figure is?


________________________________

From: bldg-sim-bounces at lists.onebuilding.org
[mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of Paul
Grahovac
Sent: 14 January 2010 23:11
To: Crockett, Jim; bldg-sim at lists.onebuilding.org
Subject: Re: [Bldg-sim] Infiltration baseline for modeling



Jim

 

I am not a modeler, but I interacted with the experts at TRANE using a
demo package they provided me.  

 

I told them I wanted to use one of their building design templates and
change only the parameter for infiltration.  We used an elementary
school in Wisconsin with a CMU back-up wall and brick cladding.  TRANE
showed me where the default air leakage parameter for that building
design template was located, and they showed me how to change it to
match the air leakage rate called out by the Air Barrier Association of
America.  We ran the model before and after, and it showed a 58%
decrease in natural gas consumption and a 22% decrease in electricity
consumption.  Right in line with the NIST study.  They confirmed to me
that no matter what design was created for the model, a default air
leakage rate would be generated by the software.

 

Paul Grahovac, LEED AP

R-GUARD Air & Water-Resistive Barrier Product Manager

PROSOCO, Inc.

3741 Greenway Circle

Lawrence, Kansas  66046

(785) 830-7355

(888) 376-3417 fax

pgrahovac at prosoco.com

web site  http://www.prosoco.com/

 

 

From: bldg-sim-bounces at lists.onebuilding.org
[mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of Crockett,
Jim
Sent: Thursday, January 14, 2010 11:50 AM
To: bldg-sim at lists.onebuilding.org
Subject: [Bldg-sim] Infiltration baseline for modeling

 

Hi all,

If I'm using Ashrae 90.1 2004, where building leakage hasn't been
defined yet, what should a 'baseline' level of infiltration be?  Any
thoughts / experience with this?

 

 

 

Jim Crockett, P.E.

 

Senior Project Engineer

Energy & Carbon Management

Nexant, Inc.

4021 S. 700 E., Suite 250

Salt Lake City, Utah 84107

 

(801) 639-5603 - phone

(801) 266-4786 - fax

 


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