[EnergyPlus_Support] Pumps: riding the curve

["caveleza" <camilovelez@xxxxxxxxxxxxxxxxxxx>]

Hello Everybody!

I'm modeling a building following ASHRAE 90.1 Appdx G, but i have a problem regarding primary/secondary pumps loop... 

According to appendix G (G3.1.3.10): 

"Chilled water
pumps in systems with less than 300 tons
cooling capacity shall be modeled as
primary/secondary systems with
secondary pump riding the pump curve."

I know that the secondary pump (in this case) must be a constant speed pump (just like the primary), but as they want that it "rides the curve" the loop should have an arrangement of two-way  or a three-way valves, but i'm not sure of this or how to do it in energyplus. Anyone has the same problem?? Any help will be appreciated!!

Thanks!

Camilo.



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