Re: [EnergyPlus_Support] Flow rate

[Meng Zhang <pizzaalan@xxxxxxxxx>]

Hi, Michael,
 
Thank you for your help. I am thinking to use "zone, system and plant sizing" to get the flow rates. Do you think it is possible?  It seems that "sizing " is just for design days. If I want to run system like a whole year, I have to specify all the flow rates by hand. Is it right?
 
Sincerely,
Alan

"Michael J. Witte" <mjwitte@xxxxxxxx> wrote:
The max flow rate in the air loop main branch is usually set to equal the sum 
of the max flow rates of the terminal units.  In your case, if you air loop 
serves a single zone, then the max flow rate should equal the max damper air 
flow rate of 0.47 m3/s.  The fan max flow rate should be the same.  The fan min 
flow rate is set by the min flow rate of the terminal untis.  This is all just 
continuity.  Look at your system diagram and once you know the flow rates of 
the terminal units, then you can figure out the flow rates for the other 
components.  Or you can use the sizing features to set these values for you.

Mike


On 2 Jun 2004, at 9:03, pizzaalan wrote:

> Hi,
> 
> I am not sure how to choose max flow rate for air loop main branch, 
> (1.3 m3/s in example), max plant loop volumetric flow rate (0.0011 
> m3/s in example), max damper air flow rate (0.47 m3/s).
> 
> Also, I am not sure how to pick up pump ( pump head? rated 
> volumetric flow rate), Fan max & min flow rate?
> 
> I will appreciate if anyone gives me a guide. Thanks.
> 
> Alan 
> 
> 
> 
> 
> The primary EnergyPlus web site is found at:
> http://www.energyplus.gov
> 
> The group web site is:
> http://groups.yahoo.com/group/EnergyPlus_Support/
> 
> Attachments are not allowed -- please post any files to the appropriate folder
> in the Files area of the Support Web Site.
> 
> Yahoo! Groups Links
> 
> 
> 
> 
> 
> 



========================================================
Michael J. Witte, GARD Analytics, Inc.
EnergyPlus Testing and Support      
EnergyPlus-Support@xxxxxxxx



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