I would recommend *not* using the Common Pipe Simulation in the PlantLoop object. The relatively new HeatExchanger:FluidToFluid is able to reliably connect two separate plant loops together and can be controlled. With this heat exchanger you would have two separate Plant Loops, one for primary and one for secondary (or even multiple secondary loops). There are no limitations for variable speed pumps with this approach.
From: EnergyPlus_Support@xxxxxxxxxxxxxxx [mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx] On Behalf Of andresdagm@xxxxxxxxx
Sent: Thursday, August 29, 2013 9:25 PM
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Subject: [EnergyPlus_Support] How to model Primary and secondary both variable pumps in Chiller water systems
Hi, all group, i need some help!
I got this warning when i try to simulate a Primary and secondary both variable pumps in Chiller water systems (The chiller incorporate VFD):
** Warning ** SetupCommonPipes: detected variable speed pump on supply inlet of TwoWayCommonPipe plant loop
** ~~~ ** Occurs on plant loop name = CHW LOOP
** ~~~ ** The common pipe model does not support varying the flow rate on the primary/supply side
** ~~~ ** The primary/supply side will operate as if constant speed, and the simulation continues.
It seems that Commonpipesimulation in Plant Loop doesn't simulate primary and secondary variable pumps.
There is any way to could model primary and secondary variable pumps??
Thank you,
Dante Garcia
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