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Re: [EnergyPlus_Support] Heat Flux



Shivraj,

Every EnergyPlus simulation is capable of creating its own list of variables that are relevant to your specific simulation.

To see the variables available, include the following in your input data file, and then run:

  Output:VariableDictionary,IDF,Unsorted;

This process will create a file ending with the extension .rdd  Open this in some notepad or text editor, and this will contain all variables relevant to your particular simulation.  These can be copied and pasted into your input data file without modification, and, once you simulate the file again, the output can be found in the file with extension .csv  (or .eso if you have installed the eso reader... the .eso file will give you a graphical output of the variable)

some variables that you may find relevant:

Output:Variable,*,Surface Inside Temperature,hourly; !- Zone Average [C]
Output:Variable,*,Surface Outside Temperature,hourly; !- Zone Average [C]
Output:Variable,*,Surface Int Adjacent Air Temperature,hourly; !- Zone Average [C]
Output:Variable,*,Surface Int Convection Coeff,hourly; !- Zone Average [W/m2-K]
Output:Variable,*,Surface Int Convection Heat Rate,hourly; !- Zone Average [W]
Output:Variable,*,Surface Int Convection Heat Rate per Area,hourly; !- Zone Average [W/m2]
Output:Variable,*,Surface Int Convection Heat Gain to Air,hourly; !- Zone Sum [J]
Output:Variable,*,Surface Ext Outdoor Dry Bulb,hourly; !- Zone Average [C]
Output:Variable,*,Surface Ext Outdoor Wet Bulb,hourly; !- Zone Average [C]
Output:Variable,*,Surface Ext Wind Speed,hourly; !- Zone Average [m/s]
Output:Variable,*,Surface Ext Convection Heat Rate,hourly; !- Zone Average [W]
Output:Variable,*,Surface Ext Convection Heat Rate per Area,hourly; !- Zone Average [W/m2]
Output:Variable,*,Surface Ext Convection Heat Loss to Outdoors,hourly; !- Zone Sum [J]
Output:Variable,*,Surface Ext Convection Coeff,hourly; !- Zone Average [W/m2-K]
Output:Variable,*,Surface Ext Thermal Radiation Heat Rate,hourly; !- Zone Average [W]
Output:Variable,*,Surface Ext Thermal Radiation Heat Rate per Area,hourly; !- Zone Average [W/m2]
Output:Variable,*,Surface Ext Thermal Radiation Heat Loss to Outdoors,hourly; !- Zone Sum [J]
Output:Variable,*,Surface Ext Rad to Air Coeff,hourly; !- Zone Average [W/m2-K]
Output:Variable,*,Surface Ext Rad to Sky Coeff,hourly; !- Zone Average [W/m2-K]
Output:Variable,*,Surface Ext Rad to Ground Coeff,hourly; !- Zone Average [W/m2-K]

Output:Variable,*,Window Transmitted Solar,hourly; !- Zone Average [W]
Output:Variable,*,Window Transmitted Beam Solar,hourly; !- Zone Average [W]
Output:Variable,*,Window Transmitted Beam-to-Beam Solar,hourly; !- Zone Average [W]
Output:Variable,*,Window Transmitted Beam-to-Diffuse Solar,hourly; !- Zone Average [W]
Output:Variable,*,Window Transmitted Diffuse Solar,hourly; !- Zone Average [W]
Output:Variable,*,Window Heat Gain,hourly; !- Zone Average [W]
Output:Variable,*,Window Heat Loss,hourly; !- Zone Average [W]
Output:Variable,*,Window Gap Convective Heat Flow,hourly; !- Zone Average [W]
Output:Variable,*,Window Solar Absorbed:Shading Device,hourly; !- Zone Average [W]
Output:Variable,*,Window Solar Absorbed:All Glass Layers Energy,hourly; !- Zone Sum [J]
Output:Variable,*,Window Transmitted Solar Energy,hourly; !- Zone Sum [J]
Output:Variable,*,Window Transmitted Beam Solar Energy,hourly; !- Zone Sum [J]
Output:Variable,*,Window Transmitted Beam-to-Beam Solar Energy,hourly; !- Zone Sum [J]
Output:Variable,*,Window Transmitted Beam-to-Diffuse Solar Energy,hourly; !- Zone Sum [J]
Output:Variable,*,Window Transmitted Diffuse Solar Energy,hourly; !- Zone Sum [J]
Output:Variable,*,Window Heat Gain Energy,hourly; !- Zone Sum [J]
Output:Variable,*,Window Heat Loss Energy,hourly; !- Zone Sum [J]

Output:Variable,*,Zone Transmitted Solar,hourly; !- Zone Average [W]
Output:Variable,*,Zone Beam Solar from Exterior Windows,hourly; !- Zone Average [W]
Output:Variable,*,Zone Beam Solar from Interior Windows,hourly; !- Zone Average [W]
Output:Variable,*,Zone Diff Solar from Exterior Windows,hourly; !- Zone Average [W]
Output:Variable,*,Zone Diff Solar from Interior Windows,hourly; !- Zone Average [W]
Output:Variable,*,Zone Window Heat Gain,hourly; !- Zone Average [W]
Output:Variable,*,Zone Window Heat Loss,hourly; !- Zone Average [W]
Output:Variable,*,Zone Transmitted Solar Energy,hourly; !- Zone Sum [J]
Output:Variable,*,Zone Beam Solar from Exterior Windows Energy,hourly; !- Zone Sum [J]
Output:Variable,*,Zone Beam Solar from Interior Windows Energy,hourly; !- Zone Sum [J]
Output:Variable,*,Zone Diff Solar from Exterior Windows Energy,hourly; !- Zone Sum [J]
Output:Variable,*,Zone Diff Solar from Interior Windows Energy,hourly; !- Zone Sum [J]
Output:Variable,*,Zone Window Heat Gain Energy,hourly; !- Zone Sum [J]
Output:Variable,*,Zone Window Heat Loss Energy,hourly; !- Zone Sum [J]

When using these variables, you can either leave the variable request as is with the * in, and this will give you the selected variable for all applicable objects... ie if you use this "Output:Variable,*,Window Transmitted Solar,hourly; !- Zone Average [W]"   you will get this variable output for EVERY window in your building. It is better to write the variable like so:

Output:Variable, InsertWindowNameHere, Window Transmitted Solar,hourly; !- Zone Average [W]

This will give you the transmitted solar for ONLY the selected window.

Hope this helps,

Jason

On Sat, Jan 15, 2011 at 11:33 PM, shiv dhaka <shiv_dhaka@xxxxxxxxxxx> wrote:
 

Dear support,
 
 
For thoroughly analysis of natural ventilated /conditioned building, it is important to work out Surface heat Flux as Roof, wall, window, frames.
so I want to ask about such type of Out Put variable, whether these are available with current verson of EnergyPlus or not.
 
If yes, exactly which Output variable stand for this.
 
 
I look forward your response.
 
Thanks
Shivraj
 
 
 

 
 
 

 

with warm regards

ShivRaj Dhaka

MNIT

Jaipur, India

98285 78171


 






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