[BLDG-SIM] How to simulate VAV systems without cooling coils in eQuest

[Mitchell Dec]

Brandon,
 
You could set your capcities to zero. However, if this is for a LEED model, beware of the fact that ASHRAE 90.1 (1999 or 2004, take your pick) requires you to model a code equivalent system whenever a cooling or heating system does not exist in the actual design. In order to minimize the impact on your overall energy consumption you could set schedules for the summer months in which the temperature of the building is allowed to increase to limits not acceptable during the normal conditioning hours, turn fans off, and alter the fraction/multiplier for internal loads such as lighting and misc equipment. This would be a truly representative case as less lighting, computers, etc will be active.
 

 

Mitchell J. Dec
Energy Analyst 

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

  _____  

320 SW Washington, Suite 200
Portland, OR 97204-2640
T.  503.227.5280  F. 503.274.7674
Direct: 503.345.6283


Thinking. Inside the building.
http://www.glumac.com/ 

-----Original Message-----
From: BLDG-SIM at GARD.COM [mailto:BLDG-SIM at GARD.COM]On Behalf Of Brandon Nichols
Sent: Monday, August 28, 2006 5:18 PM
To: BLDG-SIM at GARD.COM
Subject: [BLDG-SIM] How to simulate VAV systems without cooling coils in eQuest


All,
 
 
In the northwest USA we often use VAV systems without cooling for schools -- 100% outside air economizer cooling, and 'off' for three months in the summer.  The particular system I want to model in eQuest is the standard VAV with heat recovery, but I can't figure how to either define it without a cooling coil, or render the cooling coil and chiller ineffective.
 
What is the best way to do this?
 
 
Thanks
 

Brandon Nichols, PE
Mechanical
HARGIS ENGINEERS

600 Stewart Street

Suite 1000

Seattle, WA 98101

www.hargis.biz

 

d | 206.436.0400  c | 206.228.8707

o | 206.448.3376  f  | 206.448.4450

 
 


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