On 9/30/2010 4:45 PM, James V Dirkes II, PE wrote:
Dear Rodrigo,,
You will need to “autosize” the PFP fans, find their capacity from .eso file (or the “HVACEquipmentSizing” report), and then use that value as “Maximum Primary Air Flow Rate”, and one half for the “Minimum Secondary Air Flow Rate”, something like the example below….
The Building Performance Team
James V. Dirkes II, P.E., LEED AP
1631 Acacia Drive NW
Grand Rapids, MI 49504
616 450 8653
From: EnergyPlus_Support@xxxxxxxxxxxxxxx [mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx] On Behalf Of Rodrigo Perez Gallegos
Sent: Thursday, September 30, 2010 4:05 PM
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Subject: [EnergyPlus_Support] Simulation LEED _ System 8
Dear
I'm simulating a building to meet LEED
the system to use is 8 per ASHRAE (VAV with PFP Boxes)
But I have a question to the point of Ashrae G3.1.3.14
90.1-2007.
According to Ashrae, fan in parallel VAV fa Powered boxes shall be sized for 50% of the peak design flow rate, this flow corresponds to the field MAXIMUM PRIMARY AIR FLOW RATE in AirTerminal:SingleDuct:ParallelPIU:Reheat?????
According to Ashrae, minimum volumen setpoint fan powered-boxes shall be equal to 30% of peak design flow rate or the rate required to meet the minimum outdoor air ventilation requirement, this flow corresponds to the field MINIMUM PRIMARY AIR FLOW FRACTION en AirTerminal:SingleDuct:ParallelPIU:Reheat, expressed as a fraction?????
Thank.
Best Regards.
Rodrigo Pérez.
Engineer HVAC | MDCS.
-- Richard A. Raustad Senior Research Engineer Florida Solar Energy Center University of Central Florida 1679 Clearlake Road Cocoa, FL 32922-5703 Phone: (321) 638-1454 Fax: (321) 638-1439 or 1010 Visit our web site at: http://www.fsec.ucf.edu UCF - From Promise to Prominence: Celebrating 40 Years