[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
RE: [EnergyPlus_Support] Latitude parameter in PV module
Dear Mike,
Thanks for your answer, but let me insist on the question a little bit.
You have run the simulation with different weather files (I suppose with
different data in Global Horizontal Radiation field) so it's clear that
the results should be different. But if you take a weather file, and
just change the latitude, you will get the same production that in the
unchanged weather file simulation.
I have tried it with annual simulation of the example "purchair.idf"
with weather files: "USA_IL_Chicago-OHare_TMY2.epw" ,
"USA_FL_Tampa_TMY2.epw" and "ESP_Barcelona_IWEC.epw". For each of this
weather files I get the same production regardless the latitude value I
write in the weather file. Of course, the PV-production in Chicago,
Tampa and Barcelona are different.
All these questions are derived of the fact that I am finding estrange
optimum slope values for the weather in Barcelona. La latitude in
Barcelona is around 42º and the maximum production is achieved with
slope array values around 30º.
Thanks for your patience.
-----Mensaje original-----
De: Michael J. Witte [mailto:mjwitte@xxxxxxxx]
Enviado el: jueves, 04 de septiembre de 2003 18:25
Para: EnergyPlus_Support@xxxxxxxxxxxxxxx
Asunto: RE: [EnergyPlus_Support] Latitude parameter in PV module
It works OK here. I ran the same inputs with Chicaog and Phoenix
weather data and got different results. The eplus.def file is a list
of defaults and it does not reflect what is actually used for the
TRNSYS run. To see the listing from the actual TRNSYS run, see the
.trn output file in the same folder with the other EnergyPlus outputs
for your run. Search for "latitude" and the trn file will list all
of the parameters for the location that was used.
If you find that the location data is changing in the trn file but
you are still getting the same PV power output, check the inverter
capacity. If it is too small, then it will choke the power output
such that different locations might produce the same amount of power.
But the number of hours of daylight would be different, so this
might not be the issue.
Mike
On 4 Sep 2003, at 15:11, Miguel Angel Pascual wrote:
> Dear Linda,
>
> I have already changed the latitude in the weather file (N2 field in
> location object) and I still get the same PV electrical production. I
> don't know if this is right: I have checked the Eplus.def file in the
> "trnsyspv" directory and the LAT column in the radiation processor is
> always 43.1. Do you know what's going on?
>
> Thanks in advance,
>
>
>
> -----Mensaje original-----
> De: Linda Lawrie [mailto:linda@xxxxxxxxxx]
> Enviado el: jueves, 04 de septiembre de 2003 14:20
> Para: EnergyPlus_Support@xxxxxxxxxxxxxxx;
> EnergyPlus_Support@yahoogroups. com
> Asunto: Re: [EnergyPlus_Support] Latitude parameter in PV module
>
>
> At 06:46 AM 9/4/2003, Miguel Angel Pascual wrote:
>
> >Hello,
> >
> >I am running a simulation with a PV object. After running a
> >simulation, I have changed the latitude in the "Location" object, but
> >I got the
> same
> >electrical production. Can anybody explain me where or how is the
> >latitude defined in the PV object?
>
> The PV uses the same latitude as the Location and/or Weather File used
> by simulation. In fact, you must use a weather file for the current
> PV object and the weather file location information overrides the
> Location object in the input file.
>
> So, you would need to change the weather file's latitude/longitude in
> order to see a change.
>
> Cautiously.
>
>
> Linda
>
> EnergyPlus WebSite: http://www.energyplus.gov
> Owner: EnergyPlus_Support list
> Member: EnergyPlus Development Team
>
>
>
> [Non-text portions of this message have been removed]
>
>
>
> Yahoo! Groups Sponsor
>
> ADVERTISEMENT
>
> <http://rd.yahoo.com/M=259538.3830715.5078802.1261774/D=egroupweb/S=17
> 05
> 007389:HM/A=1712983/R=0/SIG=11u38u3s2/*http://hits.411web.com/cgi-bin/
> hi t?page=1374-105951838331032> click here
>
> <http://us.adserver.yahoo.com/l?M=259538.3830715.5078802.1261774/D=egr
> ou pmail/S=:HM/A=1712983/rand=303372734>
>
> To unsubscribe from this group, send an email to:
> EnergyPlus_Support-unsubscribe@xxxxxxxxxxxxxxx
>
> 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 are of the Support Web Site.
>
>
>
>
>
>
> Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service
> <http://docs.yahoo.com/info/terms/> .
>
>
>
>
> [Non-text portions of this message have been removed]
>
>
> ------------------------ Yahoo! Groups Sponsor
> ---------------------~--> Buy Ink Cartridges or Refill Kits for Your
> HP, Epson, Canon or Lexmark Printer at Myinks.com. Free s/h on orders
> $50 or more to the US & Canada.
> http://www.c1tracking.com/l.asp?cid=5511
> http://us.click.yahoo.com/l.m7sD/LIdGAA/qnsNAA/dkFolB/TM
> ---------------------------------------------------------------------~
> ->
>
> To unsubscribe from this group, send an email to:
> EnergyPlus_Support-unsubscribe@xxxxxxxxxxxxxxx
>
> 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 are of the Support Web Site.
>
>
>
>
>
>
> Your use of Yahoo! Groups is subject to
> http://docs.yahoo.com/info/terms/
>
========================================================
Michael J. Witte, GARD Analytics, Inc.
EnergyPlus Testing and Support
EnergyPlus-Support@xxxxxxxx
Yahoo! Groups Sponsor
ADVERTISEMENT
<http://rd.yahoo.com/M=259538.3830715.5078802.1261774/D=egroupweb/S=1705
007389:HM/A=1712983/R=0/SIG=11u38u3s2/*http://hits.411web.com/cgi-bin/hi
t?page=1374-105951838331032> click here
<http://us.adserver.yahoo.com/l?M=259538.3830715.5078802.1261774/D=egrou
pmail/S=:HM/A=1712983/rand=527672836>
To unsubscribe from this group, send an email to:
EnergyPlus_Support-unsubscribe@xxxxxxxxxxxxxxx
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 are of the Support Web Site.
Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service
<http://docs.yahoo.com/info/terms/> .
[Non-text portions of this message have been removed]
------------------------ Yahoo! Groups Sponsor ---------------------~-->
Buy Ink Cartridges or Refill Kits for Your HP, Epson, Canon or Lexmark
Printer at Myinks.com. Free s/h on orders $50 or more to the US & Canada. http://www.c1tracking.com/l.asp?cid=5511
http://us.click.yahoo.com/l.m7sD/LIdGAA/qnsNAA/dkFolB/TM
---------------------------------------------------------------------~->
To unsubscribe from this group, send an email to:
EnergyPlus_Support-unsubscribe@xxxxxxxxxxxxxxx
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 are of the Support Web Site.
Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/