I managed to go through the calcs, and setup the model. However, it seems that program is not reading the values I specified as .txt files. When I open the .csv output files all columns with wall outside surface temperatures are zeros. I attached three print screens below: Schedule File (where I link the input file), SurfaceProperty:OtherSideCoefficients (where I specify my outside surface temps and link to the schedule name), and BuildingSurfaceDetailed file (where I link the wall surfaces to the OtherSideCoef calculated temperatures).
I don?t know if I need to enter anything into Schedule:Compact menu, cause when I select any schedule from Schedule:Compact menu in my OtherSideCoeff menu in the row for Constant Temperature Schedule Name, it reads these values without a problem But then the question is how to create 8760 hrs temp profile in Schedule: Compact Menu.
Danko Davidovic
Staff II - Building Technology
SIMPSON GUMPERTZ & HEGER
781.907.9000 main
781.907.9260 direct
781.907.9009 fax
www.sgh.com
From: EnergyPlus_Support@xxxxxxxxxxxxxxx [ mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx] On Behalf Of Griffith, Brent
Sent: Wednesday, October 28, 2009 7:31 PM
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Subject: RE: [EnergyPlus_Support] Two-three different outside conditions (weather data)
I don?t know what ?drop down? list you refer to. The output variables available for a particular model are reported to the RDD file, so open the *.rdd text file from a previous run to see what can be reported. Zone Mean Air Temperature is the name of one of the output variables and is requested like this,
Output:Variable,*,Zone Mean Air Temperature,hourly; !- Zone Average [C]
You?ll need some kind of HVAC system, unless you want to model free floating indoor conditions,.
Sent: Wednesday, October 28, 2009 5:16 PM
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Subject: RE: [EnergyPlus_Support] Two-three different outside conditions (weather data)
Wow, this is what I call superfast response.
Have you read my question at the very about zone temperature outputs? Do I need to setup some heating device, or schedule for it?
Danko Davidovic
Staff II - Building Technology
SIMPSON GUMPERTZ & HEGER
781.907.9000 main
781.907.9260 direct
781.907.9009 fax
www.sgh.com
From: EnergyPlus_Support@xxxxxxxxxxxxxxx [ mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx] On Behalf Of Griffith, Brent
Sent: Wednesday, October 28, 2009 7:12 PM
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Subject: RE: [EnergyPlus_Support] Two-three different outside conditions (weather data)
Interesting application and just the sort of thing OtherSideCoefficients (OSC) is meant for. Sounds like you have it correct, here some brief responses.
1. yes
2. no, you put in the name of the OSC, XYZ in your case
3..9 yes
10. file should have single columns of 8760 data for each separate schedule.
11. yes.
12. the name of the schedule can include the full path.
Sent: Wednesday, October 28, 2009 4:43 PM
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Subject: RE: [EnergyPlus_Support] Two-three different outside conditions (weather data)
Hi Griffith,
Thanks for your prompt answer. Trying to summarize the steps I need to accomplish this:
1. For particular building surface description in: Outside Boundary Condition I select OtherSideCoefficients
2. Do I leave blank Outside Boundary Condition Object then?
3. In Advance Surface Concepts I select SurfaceProperty: OtherSIdeCoefficients
4. Add Object there and Name it: XYZ
5. I leave blank Combined Convective/Radiative Film Coefficient.
Here is description how it is calculated:
?This object sets the other side conditions for a surface in a variety of ways.
if>0, this field becomes the exterior convective/radiative film coefficient and the other fields are used to calculate the outdoor air temperature then exterior surface temperature based on outdoor air and specified coefficient if<=0, then remaining fields calculate the outside surface temperature following fields are used in the equation: SurfTemp=N7*TempZone + N4*OutdoorDry-bulb + N2*N3 + GroundTemp*N5 + WindSpeed*N6*OutdoorDry-bulb
ID: N1
No default value available
This field is required.?
6. Set Up Constant Temperature field to zero for example (Default value)
7. Select my Temp Profile from: Constant Temperature Schedule Name in the drop list.
8. In the Schedule:File I create previously my Temp Profile.
9. File Name: I write the name of the file where the temperatures are written.
10. In which format I should have this text file created (two columns: hour and temps, or one column only with temperatures for 8760 hours)
11. Adjust the Column Separator accordingly to my input file..
12. I assume this file should be located in the same folder with .idf file cause I don?t see anywhere to enter to the path to the file.
Am I missing something, and should this procedure work out (not to be overridden by the algorithm for surface temp)? Do I need to set up zeros for all other coefficients just to be sure the other parameters are not used.
To explain a little bit the problem I am working on. I am trying to calculate the interior temperatures for some huge underground structure with various levels of ventilation rates (no heating or cooling). I use other software where I created the underground structure with surrounding soil and enter the calculated temps for interior air space from Energy plus. Then I use the output from that software on the outside boundary of my shell and average them for each level of my structure and enter those values as outside surface temperatures for each exterior wall. I repeat this procedure several times until I get reasonable match between the interior temps and outside surface temps between these two programs. I specified the ventilation rates through zone ventilation objects where I assign 24/7 schedule and air changes per hour for each zone.
I have the following problem: when I go to select the output variable I don?t see a list of zone temperatures (the drop list is blank). Do I need to specify any type of heating system or something in order to get this output properly.
Sorry for asking you all these questions, I am relatively new to text input editor and want to make sure I am doing everything right.
Thanks one more time for your quick feedback on my question.
Have a great evening.
Danko Davidovic
Staff II - Building Technology
SIMPSON GUMPERTZ & HEGER
781.907.9000 main
781.907.9260 direct
781.907.9009 fax
www.sgh.com
From: EnergyPlus_Support@xxxxxxxxxxxxxxx [ mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx] On Behalf Of Griffith, Brent
Sent: Wednesday, October 28, 2009 4:41 PM
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Subject: RE: [EnergyPlus_Support] Two-three different outside conditions (weather data)
The input object SurfaceProperty:OtherSideCoefficients can be used for this. You can schedule an outside surface temperature. Schedule:File can be helpful for 8760 hourly data.
Sent: Wednesday, October 28, 2009 2:33 PM
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Subject: [EnergyPlus_Support] Two-three different outside conditions (weather data)
I am trying to couple EnergyPlus model with other software that gives
me the temperatures on the outside surface of my building shell. Is there anyway to input these temperatures into Energy Plus as separate weather file or additional fake zone with user defined temperature profile for whole year?
Would appreciate any suggestions.