In the nutshell,Â
Total power and gpm are additive for pumps in parallel, but not W/gpm. W/gpm is additive for the total of the primary and total of the secondary, and should equal 22 W/gpm.â??This has been also discussed on 5/6/2014 and reply from Mr. Jim was very satisfactory.
â??I also found great answers on the following forum:Â
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Hope this helps!â??
On 15 Jul 2015 20:11, "seanking.1970@xxxxxxxxxxx [EnergyPlus_Support]" <EnergyPlus_Support@xxxxxxxxxxxxxxx> wrote:
ÂHi,
ASHRAE 90.1 G3.1.3.10 indicates that the baseline building design pump power shall be 22 W/gpm, equivalent to 90 feet head with 78% combined impeller and motor efficiency. And the chilled water system should be modeled as primary/secondary systems.
The question is: how to split this 91 ft head to primary and secondary chilled water pumps? They should be evenly distributed or there are some certain portions?
Any comments/advice are welcomed.
Sean
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Posted by: Javed Iqbal <eee.javed@xxxxxxxxx>
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