[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

[EnergyPlus_Support] Re: Weather file of College Station - Texas

Joe,

As I have mentioned to this forum earlier, the quality of TMY3 is lower 
than that of TMY2, due to the shorter database (15 years rather than 
30), and the much lower quality of the cloud input data to the radiation 
model. That is why I asked Dru to keep the TMY2 database alive on the E+ 
website.

I agree with you that a more specific study is desirable for College 
Station, and more generally for all sites where both TMY2 and TMY3 are 
available. Many surprises are likely...

Chris



----------

Chris,

Thanks for actually delving into this, rather than leaving it at the
"anomalous, but not outside of the realm of possibility" stage.

The June in the College Station file is from 2004, so it might be 
interesting to see what the other models show for that actual historical 
period. If the results are also as divergent as what you show below,
then I'd say there is indeed something wrong.

Eman's question motivated me to compare the monthly DNIs for Texas 
stations in the TMY3 and TMY2 files. The TMY3 files showed much more
variability, so much that there were no discernable seasonal trends.

Joe

> Thank you very much
>  Eman Tora
>
>
>   


-- 
Chris A. Gueymard, PhD
Solar Consulting Services
P.O. Box 392
Colebrook, NH 03576, USA
Tel. (603) 237-8550
Fax  (603) 237-5314
http://www.SolarConsultingServices.com



------------------------------------

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 currently allowed but be mindful that not everyone has a high speed connection.  Limit attachments to small files.

EnergyPlus Documentation is searchable.  Open EPlusMainMenu.pdf under the Documentation link and press the "search" button.
Yahoo! Groups Links

<*> To visit your group on the web, go to:
    http://groups.yahoo.com/group/EnergyPlus_Support/

<*> Your email settings:
    Individual Email | Traditional

<*> To change settings online go to:
    http://groups.yahoo.com/group/EnergyPlus_Support/join
    (Yahoo! ID required)

<*> To change settings via email:
    EnergyPlus_Support-digest@xxxxxxxxxxxxxxx 
    EnergyPlus_Support-fullfeatured@xxxxxxxxxxxxxxx

<*> To unsubscribe from this group, send an email to:
    EnergyPlus_Support-unsubscribe@xxxxxxxxxxxxxxx

<*> Your use of Yahoo! Groups is subject to:
    http://docs.yahoo.com/info/terms/