RE: [EnergyPlus_Support] Latitude parameter in PV module

["Michael J. Witte" <mjwitte@xxxxxxxx>]

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
> 
> 
> 
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========================================================
Michael J. Witte, GARD Analytics, Inc.
EnergyPlus Testing and Support      
EnergyPlus-Support@xxxxxxxx


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