[Equest-users] Fedx

[Paul Diglio]

Richard:

I would base the model on one boiler/hot water loop with heating coils in each 
air handler.  As far as airflow, I would let eQuest autosize the CFM.  Run the 
simulation and if there are excessive unmet hours that cannot be corrected by 
throttling range adjustments, try bumping up the airflow above the amount that 
eQuest calculated.

Fan energy is calculated using the CFM, minimum motor efficiency and estimated 
duct static loss per 90.1-2007 6.5.3.1.1A.

For the VAV portion, you can set the minimum and maximum fan ratios or you can 
define a discharge air reset schedule.

Paul Diglio




________________________________
From: "RJTHEACMAN at aol.com" <RJTHEACMAN at aol.com>
To: equest-users at lists.onebuilding.org
Sent: Thu, March 3, 2011 12:47:49 PM
Subject: [Equest-users] Fedx

  
I am modeling a 110,000 sf. Fedex sorting facility for LEED and the  building 
has a small office area that is heated and cooled by rooftop  units and the 
remainder of the warehouse is only heated.
 
In accordance with ASHRAE 90.1 2007 if no cooling system exists the cooling  
system shall be identical to the system modeled in the baseline building  
design.
 
That system is a system 5 packaged vav with reheat, which includes a hot  water 
boiler. 

 
We have (15) gas-fired unit heaters that provide heat to the  warehouse.
 
My question is do I set up my heating system with 15 hot water boilers, the  
same heating capacity as the unit heaters?
 
For the fan energy, do I set my air quantity the same as my unit  heaters?
 
How do I address the VAV portion of the system as well as the hot water  pumps?
 
I have my model setup with (2) separate HVAC systems (1) Packaged VAV with  
Reheat and (2) Packaged rooftop DX units with a gas furnace.
 
Any help will be greatly appreciated.
 
Richard Dominick, P.E.
TEC Engineers, LLC.
Norwalk, CT.
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