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[EnergyPlus_Support] using economizer
I am trying to set the CONTROLLER:OUTSIDE AIR, but I found a very strange thing: when I set the EconomizerChoice on NO ECONOMISER the gas facility consumption become the half with respect to the simulation using ECONOMIZER. I can't understand how with the economizer "on" the gas consumption is two time the case without it. Could anyone please help me to understand this behaviour?
Here attached the relative part of my input file.
Thank you very much,
Roberto
!- =========== ALL OBJECTS IN CLASS: CONTROLLER:OUTSIDE AIR ===========
CONTROLLER:OUTSIDE AIR,
outside air controller, !- Name
ECONOMIZER, !- EconomizerChoice
RETURN AIR TEMP LIMIT, !- ReturnAirTempLimit
RETURN AIR ENTHALPY LIMIT, !- ReturnAirEnthalpyLimit
NO LOCKOUT, !- Lockout
FIXED MINIMUM, !- MinimumLimit
oa mixer vendita outlet node, !- Control_Node
oa vendita mixer inlet node, !- Actuated_Node
0.0065, !- minimum outside air flow rate {m3/s}
autosize, !- maximum outside air flow rate {m3/s}
24, !- temperature limit {C}
10, !- temperature lower limit {C}
0, !- enthalpy limit {J/kg}
vendita reliefair mixer outlet node, !- Relief_Air_Outlet_Node
primary air loop vendita inlet node, !- Return_Air_Node
min oa vendita sched; !- Minimum Outside Air Schedule Name
CONTROLLER:OUTSIDE AIR,
outside air controller galleria, !- Name
ECONOMIZER, !- EconomizerChoice
RETURN AIR TEMP LIMIT, !- ReturnAirTempLimit
RETURN AIR ENTHALPY LIMIT, !- ReturnAirEnthalpyLimit
NO LOCKOUT, !- Lockout
FIXED MINIMUM, !- MinimumLimit
oa mixer galleria outlet node, !- Control_Node
oa galleria mixer inlet node, !- Actuated_Node
0.0115, !- minimum outside air flow rate {m3/s}
autosize, !- maximum outside air flow rate {m3/s}
24, !- temperature limit {C}
10, !- temperature lower limit {C}
0, !- enthalpy limit {J/kg}
galleria reliefair mixer outlet node, !- Relief_Air_Outlet_Node
primary air loop galleria inlet node, !- Return_Air_Node
min oa galleria sched; !- Minimum Outside Air Schedule Name
CONTROLLER:OUTSIDE AIR,
outside air controller uffici, !- Name
ECONOMIZER, !- EconomizerChoice
RETURN AIR TEMP LIMIT, !- ReturnAirTempLimit
RETURN AIR ENTHALPY LIMIT, !- ReturnAirEnthalpyLimit
NO LOCKOUT, !- Lockout
FIXED MINIMUM, !- MinimumLimit
oa mixer uffici outlet node, !- Control_Node
oa uffici mixer inlet node, !- Actuated_Node
0.011, !- minimum outside air flow rate {m3/s}
autosize, !- maximum outside air flow rate {m3/s}
24, !- temperature limit {C}
10, !- temperature lower limit {C}
0, !- enthalpy limit {J/kg}
uffici reliefair mixer outlet node, !- Relief_Air_Outlet_Node
primary air loop uffici inlet node, !- Return_Air_Node
min oa uffici sched; !- Minimum Outside Air Schedule Name
[Non-text portions of this message have been removed]
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