[Bldg-sim] Effect of building size on energy use intensity

[Jin Minming]

Thanks a lot for the information. 

The method used in Energy Star is very interesting. Source energy  may be the 
most equiable arrpoach to provide a fair comparison if buildings use different 
secondary energy sources. However, it may provide more clear relationship 
between heaing or cooling site energ use intensity and independent variables 
(HDD, CDD, floor area, etc.) if the regression is implemented for the buidlings 
of using the same primary and secondary energy form.

Jim






________________________________
From: David Eldridge <dse at grummanbutkus.com>
To: bldg-sim at lists.onebuilding.org
Sent: Sun, 10 April, 2011 18:45:22
Subject: Re: [Bldg-sim] Effect of building size on energy use intensity


There was a presentation at the SimBuild 2010 in NYC for an office building that 
was otherwise the same, identifying changes in energy usage due to the shape of 
the floor plan and quantity of window area.
 
http://www.ibpsa.us/pub/simbuild2010/technicalPresentations/SB10-PPT-TS02A-03-Baker.pdf

 
David
 
                                                                                               
 
 
David S. Eldridge, Jr., P.E., LEED AP BD+C, BEMP, BEAP, HBDP
Grumman/Butkus Associates
                                                                                               
 
 
 
From:bldg-sim-bounces at lists.onebuilding.org 
[mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of Dahlstrom, Aaron
Sent: Friday, April 08, 2011 9:11 AM
To: Jin Minming; bldg-sim at lists.onebuilding.org
Subject: Re: [Bldg-sim] Effect of building size on energy use intensity
 
Jim: 
 
Have you seen the Energy Star Technical Methodologies?
 
http://www.energystar.gov/index.cfm?c=evaluate_performance.bus_portfoliomanager_model_tech_desc

 
It shows the regressions they ran on the CBECS database to determine the Energy 
Star predicted Source EUI.
 
This delves into similar issues – for example, in the Office Tech Description, 
they discuss the correlation between the natural log of Building Area and Source 
EUI.
 
Aaron Dahlstrom , PE, LEED® AP
In Posse– A subsidiary ofAKF| 1500 Walnut Street, Suite 1414, Philadelphia, PA 
19102 

d: 215-282-6753| m: 267-507-5470| In Posse: 215-282-6800| AKF: 215-735-7290
e: ADahlstrom at in-posse.com | in posse web: www.in-posse.com | akf web: 
www.akfgroup.com
 
 
 
From:bldg-sim-bounces at lists.onebuilding.org 
[mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of Jin Minming
Sent: Thursday, April 07, 2011 4:22 PM
To: bldg-sim at lists.onebuilding.org
Subject: [Bldg-sim] Effect of building size on energy use intensity
 
Dear all,

Building size (or floor area)  should have some influences on energy use 
intensity (Btu per sq ft). Roughly speaking, heating energy use intensity may 
decrease if the building size increases due to less surface area exposed to the 
outside. However, cooling and lighting energy intensity (usually electricity) 
may increase for the same reason.  This sounds the case from a report below 
except for small buildings (less than 5000 sq ft),
“A Look at Commercial Buildings in 1995: Characteristics, Energy Consumption, 
and Energy Expenditures” 


Anyone know there are some reports or research about detailed analysis about 
influenences of floorspace on energy use intensity?

Thanks,

Jim 
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