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[EnergyPlus_Support] Re: Adding more chillers doesn't reduce the autosized value

Dear James,
Thank you very much for your reply. This is very helpful to me.

Best regards,
Hisham

--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, Jim Dirkes <jim@...> wrote:
>
> Dear Hisham,
> An autosizing value always represent the entire load serve by the autosized component.  When there is more than one component (e.g., chillers) on a single loop, EACH component is assigned 100% of the autosize value.  Not very intuitive, but that's how it works in E+.
> If you want each chiller to have 50% of the autosized value, assign 0.50 to the "Sizing Factor".
> 
> James V Dirkes II, PE, BEMP, LEED AP
> www.buildingperformanceteam.com<http://www.buildingperformanceteam.com/>
> Energy Analysis, Commissioning & Training Services
> 1631 Acacia Drive, Grand Rapids, MI 49504 USA
> 616 450 8653
> 
> From: EnergyPlus_Support@xxxxxxxxxxxxxxx [mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx] On Behalf Of hisham.rashrash
> Sent: Thursday, October 10, 2013 6:50 AM
> To: EnergyPlus_Support@xxxxxxxxxxxxxxx
> Subject: [EnergyPlus_Support] Adding more chillers doesn't reduce the autosized value
> 
> 
> 
> Dear all,
> I am modeling baseline for some project, and I am trying to follow ASHRAE's 90.1-2007 section G3.1.3.7 "Type and Number of Chillers (Systems 7 & 8)" by adding more chillers until no chiller's size is above 2813[kW] (refer to table G3.1.37). The problem is no matter how many chillers I add, this doesn't reduce the autosized value! it is always the same=4258257.73[W] for all chillers, while I expected to have this value divided on chiller's number I add, for example, for one chiller it was autosized to 4258257.73[W], for two chillers I expected it to be 4258257.73[W]/2=2129128.865[W], while it was autosized to 4258257.73[W] for each chiller!
> Please advise.
> 
> Thank you very much,
> Hisham.
>




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