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.
From: EnergyPlus_Support@xxxxxxxxxxxxxxx
[mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx] On Behalf Of anakondan2001
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.
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