Re: [EnergyPlus_Support] Can Eplus process expression as input?

[Linda Lawrie <linda@xxxxxxxxxxxxxx>]

To have expressions used you would need to use the epmacro
or parametric preprocessor version (or have an EMS program that still
wouldn't allow in this object that _expression_).

Both epmacro and parametric preprocessor are described in the Auxiliary
Programs document and/or the Input Output Reference.

At 03:56 AM 3/17/2013, marko.ignjatovic1980 wrote:
> Hi all,
>
> although in Input output reference I found that E+ can take an
> expressions instead of fixed values, I am not sure my variable fan model
> does that (what variable should I measure, since fan power consumption is
> 0 in my case). This is with numbers - I was trying to optimize it using
> genopt.
>
> Fan:VariableVolume,
>     DUPLA FASADA1 Supply Fan,!- Name
>     HVACTemplate-Always 1 DSF,  !- Availability
> Schedule Name
>    
> 0.7,                    
> !- Fan Efficiency
>    
> 100,                    
> !- Pressure Rise {Pa}
>     =15*(0-1)*40*8/3600,     !-
> Maximum Flow Rate {m3/s}
>    
> Fraction,               
> !- Fan Power Minimum Flow Rate Input Method
>    
> 0.1,                    
> !- Fan Power Minimum Flow Fraction
>    
> 0,                      
> !- Fan Power Minimum Air Flow Rate {m3/s}
>    
> 0.9,                    
> !- Motor Efficiency
>    
> 1,                      
> !- Motor In Airstream Fraction
>    
> 0.0015302446,           
> !- Fan Power Coefficient 1
>    
> 0.0052080574,           
> !- Fan Power Coefficient 2
>    
> 1.1086242,              
> !- Fan Power Coefficient 3
>    
> -.11635563,             
> !- Fan Power Coefficient 4
>    
> 0,                      
> !- Fan Power Coefficient 5
>     DUPLA FASADA1 Mixed Air Outlet,  !- Air Inlet
> Node Name
>     DUPLA FASADA1 Supply Fan Outlet,  !- Air Outlet
> Node Name
>    
> Ventilator;             
> !- End-Use Subcategory

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