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. |
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