Re: [EnergyPlus_Support] Problems with extracting hourly variables from EnergyPlus

Joe,��

That is what I was thinking you were after, in that case you likely will want to use:

Output:Variable,*,Surface Inside Face Convection Heat Gain Energy,hourly; !- Zone Sum [J]

Output:Variable,*,Surface Inside Face Convection Heat Gain Rate,hourly; !- Zone Average [W]

But might also find these��useful:��

Output:Variable,*,Surface Average Face Conduction Heat Gain Rate,hourly; !- Zone Average [W]

Output:Variable,*,Surface Average Face Conduction Heat Loss Rate,hourly; !- Zone Average [W]

Output:Variable,*,Surface Inside Face Convection Heat Gain Energy,hourly; !- Zone Sum [J]

Output:Variable,*,Surface Inside Face Conduction Heat Transfer Energy,hourly; !- Zone Sum [J]

Output:Variable,*,Surface Average Face Conduction Heat Transfer Energy,hourly; !- Zone Sum [J]

Below is the full list of inside face options:��

Output:Variable,*,Surface Inside Face Absorbed Shortwave Radiation Rate,hourly; !- Zone Average [W]

Output:Variable,*,Surface Inside Face Adjacent Air Temperature,hourly; !- Zone Average [C]

Output:Variable,*,Surface Inside Face Beam Solar Radiation Heat Gain Rate,hourly; !- Zone Average [W]

Output:Variable,*,Surface Inside Face Conduction Heat Gain Rate,hourly; !- Zone Average [W]

Output:Variable,*,Surface Inside Face Conduction Heat Loss Rate,hourly; !- Zone Average [W]

Output:Variable,*,Surface Inside Face Conduction Heat Transfer Energy,hourly; !- Zone Sum [J]

Output:Variable,*,Surface Inside Face Conduction Heat Transfer Rate,hourly; !- Zone Average [W]

Output:Variable,*,Surface Inside Face Conduction Heat Transfer Rate per Area,hourly; !- Zone Average [W/m2]

Output:Variable,*,Surface Inside Face Convection Classification Index,hourly; !- Zone Average []

Output:Variable,*,Surface Inside Face Convection Heat Gain Energy,hourly; !- Zone Sum [J]

Output:Variable,*,Surface Inside Face Convection Heat Gain Rate,hourly; !- Zone Average [W]

Output:Variable,*,Surface Inside Face Convection Heat Gain Rate per Area,hourly; !- Zone Average [W/m2]

Output:Variable,*,Surface Inside Face Convection Heat Transfer Coefficient,hourly; !- Zone Average [W/m2-K]

Output:Variable,*,Surface Inside Face Convection Model Equation Index,hourly; !- Zone Average []

Output:Variable,*,Surface Inside Face Convection Reference Air Index,hourly; !- Zone Average []

Output:Variable,*,Surface Inside Face Exterior Windows Incident Beam Solar Radiation Energy,hourly; !- Zone Sum [J]

Output:Variable,*,Surface Inside Face Exterior Windows Incident Beam Solar Radiation Rate,hourly; !- Zone Average [W]

Output:Variable,*,Surface Inside Face Exterior Windows Incident Beam Solar Radiation Rate per Area,hourly; !- Zone Average [W/m2]

Output:Variable,*,Surface Inside Face Heat Balance Calculation Iteration Count,hourly; !- Zone Sum []

Output:Variable,*,Surface Inside Face Initial Transmitted Diffuse Absorbed Solar Radiation Rate,hourly; !- Zone Average [W]

Output:Variable,*,Surface Inside Face Initial Transmitted Diffuse Transmitted Out Window Solar Radiation Rate,hourly; !- Zone Average [W]

Output:Variable,*,Surface Inside Face Interior Windows Incident Beam Solar Radiation Energy,hourly; !- Zone Sum [J]

Output:Variable,*,Surface Inside Face Interior Windows Incident Beam Solar Radiation Rate,hourly; !- Zone Average [W]

Output:Variable,*,Surface Inside Face Interior Windows Incident Beam Solar Radiation Rate per Area,hourly; !- Zone Average [W/m2]

Output:Variable,*,Surface Inside Face Internal Gains Radiation Heat Gain Energy,hourly; !- Zone Sum [J]

Output:Variable,*,Surface Inside Face Internal Gains Radiation Heat Gain Rate,hourly; !- Zone Average [W]

Output:Variable,*,Surface Inside Face Internal Gains Radiation Heat Gain Rate per Area,hourly; !- Zone Average [W/m2]

Output:Variable,*,Surface Inside Face Lights Radiation Heat Gain Energy,hourly; !- Zone Sum [J]

Output:Variable,*,Surface Inside Face Lights Radiation Heat Gain Rate,hourly; !- Zone Average [W]

Output:Variable,*,Surface Inside Face Lights Radiation Heat Gain Rate per Area,hourly; !- Zone Average [W/m2]

Output:Variable,*,Surface Inside Face Net Surface Thermal Radiation Heat Gain Energy,hourly; !- Zone Sum [J]

Output:Variable,*,Surface Inside Face Net Surface Thermal Radiation Heat Gain Rate,hourly; !- Zone Average [W]

Output:Variable,*,Surface Inside Face Net Surface Thermal Radiation Heat Gain Rate per Area,hourly; !- Zone Average [W/m2]

Output:Variable,*,Surface Inside Face Solar Radiation Heat Gain Energy,hourly; !- Zone Sum [J]

Output:Variable,*,Surface Inside Face Solar Radiation Heat Gain Rate,hourly; !- Zone Average [W]

Output:Variable,*,Surface Inside Face Solar Radiation Heat Gain Rate per Area,hourly; !- Zone Average [W/m2]

Output:Variable,*,Surface Inside Face System Radiation Heat Gain Energy,hourly; !- Zone Sum [J]

Output:Variable,*,Surface Inside Face System Radiation Heat Gain Rate,hourly; !- Zone Average [W]

Output:Variable,*,Surface Inside Face System Radiation Heat Gain Rate per Area,hourly; !- Zone Average [W/m2]

Output:Variable,*,Surface Inside Face Temperature,hourly; !- Zone Average [C]

Jeremiah D. Crossett��| Senior��Analyst��| ��Phase Change Energy Solutions

120 E. Pritchard St. ��| Asheboro, NC 27203 ��| Mobile��503-688-8951

www.phasechange.com��

��

On Mon, Sep 30, 2013 at 2:18 PM, Joe Huang <yjhuang@xxxxxxxxxxxxxxxxxxxxxxxx> wrote:

Jeremiah, Jean,

I want the total heat flux of the ceiling going into or out of the house air volume.�� If it's a rate, I would just multiply it by the surface area to get what I need.�� I am not interested in the stored heat per se, as I want to see the impact on the house's heating and cooling loads.��

I'm still somewhat unclear on how EnergyPlus distinguishes between conduction and convection, and at one time thought that the convection heat flows accounted for all heat flows into the air, but that can't be because the numbers are too small.

Just so you know, I've been communicating with Ed Lee offline on why the Output:Diagnostics,DisplayAdvancedReportVariables; seem not to be working for me.
Joe
Joe Huang
White Box Technologies, Inc.
346 Rheem Blvd., Suite 108D
Moraga CA 94556
yjhuang@xxxxxxxxxxxxxxxxxxxxxxxx
http://weather.whiteboxtechnologies.com for simulation-ready weather data
(o) (925)388-0265
(c) (510)928-2683
"building energy simulations at your fingertips"
On 30/09/2013 1:37 PM, Jeremiah Crossett wrote:
��
Joe,��

For heat flux you want load normalized by area correct? �� These are conduction I believe after radiation and before convection... You might actually want to use convection dependent on your goal, however prior to v7.2 the first two variables below were called heat flux. ��

Surface Inside Face Conduction Heat Transfer Rate per Area [W/m2]

Surface Outside Face Conduction Heat Transfer Rate per Area [W/m2]

I find that the "average" or "storage" are the most useful.

Surface Average Face Conduction Heat Transfer Rate per Area [W/m2]

Surface Heat Storage Rate per Area [W/m2]
Jeremiah D. Crossett��| Senior��Analyst��| ��Phase Change Energy Solutions

120 E. Pritchard St. ��| Asheboro, NC 27203 ��| Mobile��503-688-8951

www.phasechange.com��

��
On Mon, Sep 30, 2013 at 11:31 AM, jeannieboef@xxxxxxxxx <jeannieboef@xxxxxxxxx> wrote:
��
Mmm...there are usually report variables availible for surfaces. The keyword "surface" should be in there somewhere. The variables you mentioned seem mainly "zone average" types which apply to all the zone facing surfaces. The "surface" variables you need, you'll need to replace the wild card '*' with the specific surface name. You'll obviously be looking for radiation and convection rates from this specific surface.

I've only looked at temperature until now, but I'm sure Jerimia has controlled the heat flows more concisely.

Post the rdd...some of the variable names have changed in the v8 release, but we could try and filter out the right ones.

Mit freundlichen Gr��en- Sent from my iPhone��(excuse the brevity)

i. A.

Jean Marais

b.i.g. bechtold

Tel. �� +49 30 6706662-23
On 30.09.2013, at 19:35, Joe Huang <YJHuang@xxxxxxxxxxxxxxxxxxxxxxxx> wrote:
��
Thanks to Jeremiah, Linda, and Jean for their replies and tips.

I wasn't aware of the Output:VariableDictionary,IDF; and *.rdd features in EnergyPlus, and am now able to get some of the hourly variables of interest.��

However, I still haven't an output variable giving the net heat flow from an interior surface into a zone.�� What I see in the *.rdd are just these five variables for interior surfaces:

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]

I've extracted the 3rd and 5th ones, but found they were the same when converted to the same units.�� They also seem too small to be the total heat flow from the surface. Are there any other variables that track the radiative heat flow or the conductive heat flow from the surface?

Joe
Joe Huang
White Box Technologies, Inc.
346 Rheem Blvd., Suite 108D
Moraga CA 94556
yjhuang@xxxxxxxxxxxxxxxxxxxxxxxx
http://weather.whiteboxtechnologies.com for simulation-ready weather data
(o) (925)388-0265
(c) (510)928-2683
"building energy simulations at your fingertips"
On 28/09/2013 3:31 AM, jeannieboef@xxxxxxxxx wrote:
��
I'm with Jerimia on this one:

Specify the output variable dictionary to output an .rdd file in IDF format.

Run the simulation to produce the rdd file (which will list all the possible output variables for your simulation).��

Open the rdd in a text editor, and copy paste the output variables that you want to include in your simulation and re-run.

The trickiest part are the definitions of the different outputs. You'll have to search the documentation for the ones which look interesting.��

Mit freundlichen Gr��en- Sent from my iPhone��(excuse the brevity)

i. A.

Jean Marais

b.i.g. bechtold

Tel. �� +49 30 6706662-23

On 27.09.2013, at 23:09, Joe Huang <YJHuang@xxxxxxxxxxxxxxxxxxxxxxxx> wrote:
��
I'm doing some diagnostic simulations comparing EnergyPlus to another program (not DOE-2 :-)), and need to extract hourly variables for zone air temperature, inside surface temperature and heat fluxes through an interior wall.�� I took some old IDFs from 6 years ago, ran them through the IDFVersionUpdater to get Version 8.0 IDFs, and used the resultant reporting for the zone air temperature, but I'm not getting anything in the output *.eso.

�� Output:Variable,*,Site Outdoor Air Drybulb Temperature,Monthly;�� < this works
�� Output:Variable,*,Zone/Sys Air Temp,Hourly;�� < this does not work
�� Output:Variable,*,Zone Air System Sensible Cooling Rate,Monthly;�� < this works
�� Output:Variable,*,Zone Air System Sensible Heating Rate,Monthly;�� < this does not work

��Also, what is the syntax for specifying the heat flux for a particular surface ?�� I tried this but it doesn't work:

�� Output:Variable,
�� *,�� !- Key_Value
�� HOUSE:AT-FLOOR2 Heat Flow,�� !- Variable_Name
�� Hourly;�� !- Reporting_Frequency

Thanks
Joe Huang
White Box Technologies, Inc.
346 Rheem Blvd., Suite 108D
Moraga CA 94556
yjhuang@xxxxxxxxxxxxxxxxxxxxxxxx
http://weather.whiteboxtechnologies.com for simulation-ready weather data
(o) (925)388-0265
(c) (510)928-2683
"building energy simulations at your fingertips"