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[EnergyPlus_Support] Negative Zone Transmitted Solar
- To: EnergyPlus_Support@xxxxxxxxxxxxxxx
- Subject: [EnergyPlus_Support] Negative Zone Transmitted Solar
- From: "custudent213" <danny@xxxxxxxxx>
- Date: Sat, 14 Apr 2012 21:49:08 -0000
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- Delivery-date: Sat, 14 Apr 2012 15:49:12 -0600
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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
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