[EnergyPlus_Support] Re: Issue about Variable Speed Pump when minimum flow rate is set

["qingfanzeng" <qingfanzeng@xxxxxxxxx>]

Fred,

I uploaded the modified idf file by using Yahoo Files function. The 
only difference between this file to its original version 
(5ZoneAirCooled.idf in ExampleFiles folder) is that the minimum flow 
rate of the CW Circ Pump is 0.35. If you can not get that modified 
file, you may try to modify that original file to see the same result.

Thanks for your consideration and help

Qingfan Zeng  


--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, Fred Buhl <wfbuhl@...> 
wrote:
>
> Qingfan,
> 
> If this hasn't been dealt with already, email me your 2-0-0 input 
file with
> the min as 0.35.
> 
> Fred Buhl
> 
> qingfanzeng wrote:
> > Dear Supporter,
> >
> > I met one issue about Variable Speed Pump when I tried to set its 
> > minimum flow rate. I used the sample idf file - 
5ZoneAirCooled.idf 
> > and two EnergyPlus versions: 1-4-0 and 2-0-0. When the Min Flow 
Rate 
> > of CW Circ Pump (a Variable Speed Pump) is 0, the flow rate of 
this 
> > pump changes every hour, according to the building cooling load. 
But 
> > when I set the Min Flow Rate to 0.35, the flow rate of this pump 
> > keeps as constant as its maximum value in 99% cooling time. I 
post 
> > part of this result (EnergyPlus Version 1-4-0) at June 26th.
> >               
> >           Flow rate when Min as 0     Flow rate when Min as 0.35
> > 7:00       0.105827619                     1.350900891
> > 8:00       0.135507546                     1.350900891
> > 9:00       0.178759363                     1.350900891
> > 10:00      0.302383865                     1.350900891
> > 11:00      0.420776425                     1.350900891
> > 12:00      0.418370539                     1.350900891
> > 13:00      0.343836121                     1.350900891
> > 14:00      0.467934478                     1.350900891
> > 15:00      0.567593695                     1.350900891
> > 16:00      0.617053734                     1.350900891
> > 17:00      0.510519396                     1.350900891
> > 18:00      0.412040288                     1.350900891
> > 19:00      0.21313587                      1.350900891
> > 20:00      0.197417633                     1.350900891
> >
> > Best regards
> >
> > Qingfan
> >
> >
> >
> > 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.
> >
> > EnergyPlus Documentation is searchable.  Open EPlusMainMenu.pdf 
under the Documentation link and press the "search" button.
> >  
> > Yahoo! Groups Links
> >
> >
> >
> >
>




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