[EnergyPlus_Support] Re: AirflowNetwork Volume Flow Rate

["somsgr" <somsgr@xxxxxxxxx>]

Dave,

Thank you.

-Som Shrestha


--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "Roberts, David" <david.roberts@...> wrote:
>
> Som:
> 
> Asked same question of E+ help desk several months back.  Here's the response I got...
> 
> 
> The mass flow rates (kg/s) are used in internal calculations in the AirflowNetwork model. The volume flow rates are used for report only and mainly designated for multizone airflows and not for airflows in an air distribution system. They are calculated by dividing the mass flow rates by the outdoor air density for multizone airflow rates and zeros for distribution links. I will make changes for the next release. Thanks for bringing this issue.  Lixing
> 
> Dave
> 
> --
> David R. Roberts, P.E.
> Senior Engineer
> Residential Buildings Group
> Electricity, Resources & Building Systems Integration Center
> National Renewable Energy Laboratory (NREL)
> 303.384.7496
> 
> From: EnergyPlus_Support@xxxxxxxxxxxxxxx [mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx] On Behalf Of somsgr
> Sent: Tuesday, August 25, 2009 7:39 AM
> To: EnergyPlus_Support@xxxxxxxxxxxxxxx
> Subject: [EnergyPlus_Support] AirflowNetwork Volume Flow Rate
> 
> 
> 
> I am using AirflowNetwork to estimate duct heat gain/loss and airflow through each duct section. I got reasonable output for "AirflowNetwork Mass Flow Rate from Node 1 to 2", but the "AirflowNetwork Volume Flow Rate from Node 1 to 2" is zero for the same link (for all links). I appreciate any suggestion to fix the issue.
> 
> Som Shrestha
>




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