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Re: [EnergyPlus_Support] Ground Temperature Calculation
Dru and Michael,
as well explained in the energyplus_support webpage I succeeded in converting a weather .bin file downloaded for the DOE2 web site into an .epw file. I went through this process for the weatehr file of the city of Milan.
I checked the .stat file generated by ePlus weather converter and it contains the Global AVG values for the solar radiation (also contained in the ITA_Milan_IWEC.epw which is not running properly with the RunSlab batch file either).
Then, according to the readme file for converting DOE-2 .bin file into .fmt, I made the small adjustements in the .epw file to fix the few information lost in the conversion.
I run both my slab file.idf and the example ePlus SlabExample.idf with the new weatherfile .epw, and still I have the same problems. The .gdt file appears like the following one:
================================================
CHECK CONVERGENCE MESSAGE AT END OF THIS FILE!
================================================
Monthly Slab Outside Face Temperatures, C and Heat Fluxes(loss), W/(m^2)
Perimeter Area: 29.00 Core Area: 210.25
Month TAverage TPerimeter TCore TInside AverageFlux PerimeterFlux CoreFlux
1 N N N 18.00 N N N
2 N N N 18.00 N N N
3 N N N 18.00 N N N
4 N N N 20.00 N N N
5 N N N 20.00 N N N
6 N N N 20.00 N N N
7 N N N 22.00 N N N
8 N N N 22.00 N N N
9 N N N 22.00 N N N
10 N N N 22.00 N N N
11 N N N 20.00 N N N
12 N N N 20.00 N N N
OTHER SIDE COEFFICIENT OBJECT EXAMPLE FOR IDF FILE
OtherSideCoefficients,
ExampleOSC, !- OtherSideCoeff Name ***CHANGE THIS!***
0, !- Combined convective/radiative film coefficient
1, !- N2,User selected Constant Temperature {C}
1, !- Coefficient modifying the user selected constant temperature
0, !- Coefficient modifying the external dry bulb temperature
0, !- Coefficient modifying the ground temperature
0, !- Coefficient modifying the wind speed term (s/m)
0, !- Coefficient modifying the zone air temperature
! part of the equation
GroundTempCompactSchedName; !- Name of Schedule for values of const
! temperature. Schedule values replace N2.
! ***REPLACE WITH CORRECT NAME***
SCHEDULE:COMPACT,
MonthlyAveSurfaceTemp, !Name
Temperature , !- ScheduleType
Through: 1/31,
For:AllDays,
Until:24:00,
NaN ,
Through: 2/28,
For:AllDays,
Until:24:00,
NaN ,
Through: 3/31
[...]
For:AllDays,
Until:24:00,
NaN ,
Through: 11/30,
For:AllDays,
Until:24:00,
NaN ,
Through: 12/31,
For:AllDays,
Until:24:00,
NaN ;
Convergence has been gained.
And the .ger file keeps on reporting:
Program Version,GroundTempCalc - Slab, Version .6
************* GroundTempCalc Completed Successfully-- 0 Warning; 0 Severe Errors; Elapsed Time=00hr 02min 12sec
Thanks for your help.
--Davide
-----------------------------------------
Davide Dell'Oro, MSc MEng
Ph.D. student researcher
Lawrence Berkeley National Laboratory
1 Cyclotron Road - Mail Stop 90-3111
Berkeley, CA 94720 - U.S.A.
T. +1 (510) 486 4146
F. +1 (510) 486 4089
e-mail: DDellOro@xxxxxxx
Politecnico di Milano - Department B.E.S.T.
Via Ponzio, 31/a - 20133 Milano - Italy
Cell. +39 3403007874
e-mail: davide.delloro@xxxxxxxxx
----- Original Message -----
From: Drury.Crawley@xxxxxxxxxx
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Sent: Monday, October 09, 2006 2:13 PM
Subject: Re: [EnergyPlus_Support] Ground Temperature Calculation
I forgot... the DOE-2 weather processor is up on the
Yahoo Group EnergyPlus_Support site. It gives
instructions and the EXE. Look under Files > DOE-2_Weather_Converter
Dru
Drury.Crawley@xxxxxxxxx
v To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Sent by: cc:
EnergyPlus_Support@yaho Subject: Re: [EnergyPlus_Support] Ground Temperature
ogroups.com Calculation
10/09/2006 04:54 PM
Please respond to
EnergyPlus_Support
The WeatherConverter reads the text version of the DOE-2 .bin files.
Convert to text and the WeatherConverter will read them.
"Davide Dell'Oro"
<DDellOro@xxxxxxx> To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Sent by: cc:
EnergyPlus_Support@yaho Subject: Re: [EnergyPlus_Support] Ground
Temperature
ogroups.com Calculation
10/09/2006 04:50 PM
Please respond to
EnergyPlus_Support
Michael,
thanks. I saw the same issue in a couple of italian .stat files I checked
last week.
I thought about two alternatives so far : or to use the .epw file of
Geneve, even if it's not an accurate solution, or to try to convert other
weather data formats into .epw through the energyplus weather converter. Do
you know if there are any alterntive weather data format availabIe in the
net I can download? I found .bin files on the DOE2 website , but I cannot
convert them with energyplus weather converter.
--Davide
-----------------------------------------
Davide Dell'Oro, MSc MEng
Ph.D. student researcher
Politecnico di Milano - Department B.E.S.T.
Via Ponzio, 31/a - 20133 Milano - Italy
Cell. +39 3403007874
e-mail: davide.delloro@xxxxxxxxx
Lawrence Berkeley National Laboratory
1 Cyclotron Road - Mail Stop 90-3111
Berkeley, CA 94720 - U.S.A.
Cell. +1 (510) 759 6125
Fax. +1 (510) 486 4089
e-mail: DDellOro@xxxxxxx
----- Original Message -----
From: Michael J. Witte
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Sent: Monday, October 09, 2006 1:10 PM
Subject: Re: [EnergyPlus_Support] Ground Temperature Calculation
I see the problem. In the statistics file (.stat) for
ITA_Milano-Linate_IGDG,
the values for monthly average Global Horizontal solar (search the file for
"Global Avg") are NA. This is OK for EnergyPlus, because it uses the direct
and diffuse solar components. But the Slab preprocessor (and I would guess
the
Basement one as well) are apparently using the Global Horizontal solar
values
which are not present in some (or all?) of the IGDG epw files. So, for now,
you will have to find a different format weather file for a similar climate
to
use with the slab program.
I will ask if these can be reprocessed to fill in the global horizontal
data
using the direct and diffuse data.
Mike
On 7 Oct 2006 at 19:32, davidedelloro wrote:
> Dear all,
> I am building an energyplus model for a low-rise building located in
> Milan.
> I am using the RunSlab batch file placed inside the PreProcessor
> folder (GrndTempCalc) for calculating the monthly ground temperature.
> When I used the weather files ITA_Milano-Linate_IGDG,
> ITA_Milano-Malpensa_IGDG and ITA_Milan_IWEC .epw the program run
> without showing any error (from the .GER file: Program
> Version,GroundTempCalc - Slab, Version .6, GroundTempCalc Completed
> Successfully-- 0 Warning; 0 Severe Errors; Elapsed Time=00hr 00min
> 18sec) but the .GTP file doesn't report any correct temperature
> values, showing instead the "N" value in every column.
> To be sure it was not caused by my incorrect .idf input file, I run
> the simulation with the ITA_Genova_IWEC, SVN_Ljubljana_IWEC,
> CHE_Geneva_IWEC and DKN_Copenhagen_IWEC .epw files and I succeeded in
> obtaining temperature forecasts.
> I also run the SlubExample with the USA_IL_Chicago-OHare_TMY2 and
> ITA_Milano-Linate_IGDG .epw files and I obtained the same results: the
> TMY2.epw file run correctly, the IGDG.epw didn't, displaying again
> columns with "N" value in the .GTP file.
> I also tryed IGDG and IWEC.epw files fo several other italian cities
> and I obtained the same "N" value.
> I would like to know if other users found this problem and what is the
> best way to proceed.
> Thanks
> --Davide
>
>
>
>
>
>
> The primary EnergyPlus web site is found at:
> http://www.energyplus.gov
>
> The group web site is:
> http://groups.yahoo.com/group/EnergyPlus_Support/
>
> Attachments are not allowed -- please post any files to the appropriate
folder
> in the Files area of the Support Web Site.
>
> EnergyPlus Documentation is searchable. Open EPlusMainMenu.idf and press
the
> "search" button.
>
> Yahoo! Groups Links
>
>
>
>
>
>
>
>
========================================================
Michael J. Witte, GARD Analytics, Inc.
EnergyPlus Testing and Support
EnergyPlus-Support@xxxxxxxx
[Non-text portions of this message have been removed]
[Non-text portions of this message have been removed]
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