Re: [EnergyPlus_Support] water flow rate in primary and secondary loop

["Jim Dirkes jim@xxxxxxxxxxxxxxxxxxxxxxxxxxx [EnergyPlus_Support]" <EnergyPlus_Support@xxxxxxxxxxxxxxx>]

1. The primary pump should operate whenever the chiller is on.
   
2. The secondary pump should operate whenever there is a cooling load. 
3. In addition a variable speed pump usually has a minimum speed of ~30% (or for the purpose of the model a minimum power equivalent to 30% speed. The relationship looks something like:
   
   
   
   
   

On Sat, Aug 25, 2018 at 11:52 AM, fpasserini.tn@xxxxxxxxx [EnergyPlus_Support] <EnergyPlus_Support@xxxxxxxxxxxxxxxx> wrote:

 

I am modeling System 7 with primary CHW loop and secondary CHW loop, according to ASHRAE 90.1-2007..

If I see the output, it seems that the primary water pump is always working, even when the secondary pump isnâ??t. Is that fine?

Best Regards

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James V Dirkes II, CEO / President
The Building Performance Team Inc.
1631 Acacia Dr, Grand Rapids, MI 49504

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Posted by: Jim Dirkes <jim@xxxxxxxxxxxxxxxxxxxxxxxxxxx>

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