This sort of issue is one of the uses for the EnergyManagementSystem:InternalVariable object. There is an internal variable available called ?Pump Maximum Mass Flow Rate? that can provide the result of the autosize value for each pump.
From: EnergyPlus_Support@xxxxxxxxxxxxxxx [mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx] On Behalf Of Nacho Gomis
Sent: Thursday, January 24, 2013 8:29 AM
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Subject: [EnergyPlus_Support] EMS Mass Flow Rate
Hello group,
I'm trying to generate a default idf to be simulated with several weathers. This IDF contains an EMS to override the condenser flow rate, I set an variable flow rate. So my EMS sets the flow rate depending on my own rules.
The problem now it is I have a successful IDF for one weather, running without errors but this model doesn't have any autosize field for the pumps, I have filled all the autosize fields.
When I try to set, for example the Rated Flow Rate, to autosize I would need to reference my minimun flow rate, which is set in my EMS code, with a value from a EnergyPlus sensor. For exaple the 10% of the nominal flow rate.
Could someone help me with this issue?
P.S.: I have attached the working IDF and its weather.
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