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

[EnergyPlus_Support] Negative Zone Transmitted Solar



I created a weather file using the E+ utility and monitored weather conditions from a weather station I installed. The weather station provides wind speed, global horizontal radiation, dry bulb temp, and relative humidity. It looks like the utility works great - I have acceptable numbers for direct and diffuse solar - but when I use the custom weather file with my building E+ model, I get brief moments of negative transmitted solar energy right at sunset for about a week in March, which never appears when I use the standard EPW file for a near-by city. 

I am trying to figure out how to interpret the negative transmitted solar energy. Is it just solar energy reflected out of the house? If so, why doesn't it happen with the standard epw file? My diffuse and direct solar energy is of course always positive. Ultimately it isn't large enough to have a major impact on the building energy use, but I have to defend the process for my research and it raises some red flags.


Danny



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

Primary EnergyPlus support is found at:
http://energyplus.helpserve.com or send a message to energyplus-support@xxxxxxxx

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/