[BLDG-SIM] LEED energy saving calculations for Industrial Facility

[Thomas White]

Greetings fellow BLDG-SIMmers,
 
Just a note to add. We have a similar LEED v2.2 project for a food processing facility where there is a LARGE refrigeration load. If we were to include the total refrigeration load in both the denominator and numerator of the DEC/ECB calculation (for percent energy cost savings), it would badly dilute the percent savings.
 
In our LEED template submission to USGBC we opted to exclude this "industrial load," citing Section 2.3(c) from ASHRAE 90.1-2004, which allows for an industrial process classification as follows:
 
"The provisions of this standard [ASHRAE 90.1-2004] do not apply to:
(a) single family structures...
(b) buildings that do not use either electricity or fossil fuel...
(c) equipment and portions of building systems that use energy primarily to provide for industrial, manufacturing, or commercial process.
 
In other words, we've made a deliberate distinction between industrial process loads and non-industrial/commercial building process loads such as lighting, plug-loads, and office equipment. We've included the non-industrial/commercial building process loads but not the industrial process loads in the DEC/ECB calculation.
 
No word back yet from USGBC on this approach, so we can't guarantee that our interpretation is acceptable, but that's how we did it.
 
..Tom
 
 
Thomas J. White, P.E.
Associate
Lead Engineer, Energy Services
LEED® Accredited Professional

 <http://www.glumac.com/>  
  _____  

320 SW Washington, Suite 200
Portland, OR 97204-2640
T.  503.227.5280  F. 503.274.7674  D. 503-345-6246

Thinking. Inside the building.
 <http://www.glumac.com/> http://www.glumac.com
 
 
 
 -----Original Message-----
From: BLDG-SIM at gard.com [mailto:BLDG-SIM at gard.com]On Behalf Of Marcus Sheffer
Sent: Thursday, April 12, 2007 2:11 PM
To: BLDG-SIM at gard.com
Cc: yjiang_mit at yahoo.com
Subject: [BLDG-SIM] LEED energy saving calculations for Industrial Facility


Under LEED v2.2 you must include all of the process loads and equipment.
 
The post-processing you describe was used under LEED v2.1 and is not allowed under v2.2.
 
You are correct that the opportunity for savings will be less in this type of facility as a result.  The USGBC has recognized that this is an issue and is working on ways to address it.
 
Any thoughts are welcome.
 
Marcus Sheffer - Vice Chair USGBC EA TAG
Energy Opportunities, Inc/a 7group Company
1200 E Camping Area Road, Wellsville, PA  17365
717-292-2636, sheffer at sevengroup.com
www.sevengroup.com
 
 
-----Original Message-----
From: BLDG-SIM at gard.com [mailto:BLDG-SIM at gard.com] On Behalf Of Yi Jiang
Sent: Thursday, April 12, 2007 4:17 PM
To: BLDG-SIM at gard.com
Subject: [BLDG-SIM] LEED energy saving calculations for Industrial Facility
 
We are working on a LEED NC 2.2 project to predict
energy savings with eQuest for a 200,000 sf machinery
workshop facility. 
 
One question we have is whether to include the process
loads in the workshop. We feel that it makes the most
sense to include the heat generated from the process
equipment as internal cooling load and treated by HVAC
systems. However, the electrical power specifically to
process equipment should not be included. For such a
machinery facility, the electrical power to process
equipment constitutes 50% of total electricity
consumption, and can significantly reduce the total
energy saving prediction by 10%. Has anyone has
experiences with such a industrial facility? Thanks
 
--Yi    
 


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