Re: [EnergyPlus_Support] Questions on Reported Variables

[Fred Buhl <wfbuhl@xxxxxxx>]

anarui.oliveira wrote:
> Can anyone help me figure out:
>
> - Why "System Node VolFlowRate" might be reporting for some nodes, and 
> not for others (the nodes' names were copied from the corresponding 
> equipments), both air and water nodes; is this variable valid for all 
> nodes that can be found in equipments' configuration?
> - I have a lot of variables selected. Is there a limit of reported 
> variables per file?
>
> - What exactly are the "Calc Des Air Flow Rate" and "UserDes Air Flow 
> Rate" reported in ".eio" files (I looked up the documentation, but 
> couldn't find the description)?
> Whether I set it to autosize or enter the hard values manually for 
> airflow (in zone sizing, unit ventilator, cooling coil and 
> fan:OnOff), "UserDes Air Flow Rate" is reporting:
> - for the heating coil, the value(s) entered, or the value in zone 
> sizing object (similar or higher than "Calc Des Air Flow Rate");
> - for the cooling coil, a value different from those entered, different 
> from that on zone Sizing object, and LOWER than "Calc Des Air Flow Rate"
> ... and I can't check what the simulation is actually using for 
> cooling, because those nodes' flows are not showing up in the Results 
>   
The "Calc Des Air Flow Rate" is the max flow rate that the program has 
calculated to meet the
zone load (using design day weather and schedules and user specified 
zone supply air temperature)
while simulating the design days. This calculated flow rate can then be 
modified by the user in various
ways. The simplest is by applying a sizing factor. Other things that 
might alter the calculated design
flow are minimum ventilation requirements and/or minimum flow 
requirements. The result is reported
out under "User Des Air Flow Rate".

> file... 
>
> Best Regards,
> Ana Rui.
>
>
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