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[EnergyPlus_Support] Definition of air flow rates
- To: EnergyPlus_Support@xxxxxxxxxxxxxxx
- Subject: [EnergyPlus_Support] Definition of air flow rates
- From: "greenbuild15" <francois@xxxxxxxxxxxxxxx>
- Date: Wed, 05 Aug 2009 19:21:41 -0000
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Hi Everyone,
I am not certain about the definition of air flow rates in EnergyPlus. (have consulted both the Engineering & Input/Output references)
During simulations, I request output for:
Zone Mechanical Ventilation Volume Flow Rate [m3/s]
AirLoopHVAC Outdoor Air Mass Flow Rate AHU [kg/s]
AirLoopHVAC Mixed Air Mass Flow Rate AHU [kg/s]
According to the manual, Zone Mechanical Ventilation Volume Flow Rate [m3/s], reports average OUTDOOR air volume flow rates to a zone.
The total for all zones (Converted to kg/s) differs from the AirLoopHVAC Outdoor Air Mass Flow Rate AHU [kg/s].
Is this because the zone flows include ventilation flow not handled by the AHU ?
Regards,
Francois
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