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

[EnergyPlus_Support] Suspicious daylighting results - please help

Hi all,

In an earlier post, I mentioned that I was trying to subdivide a large perimeter zone into smaller zones so that I can have finer control over lighting (since only two sensors are allowed per zone).  

In the process, I discovered unexpected results.  The presence of that wall (which is mostly single glazing, to replicate an office where there is no obstruction to light between zones) nearly DOUBLES the mean workplane illuminance.  The only conclusion I can come up with is that EnergyPlus thinks that that interzonal window is actually outside (despite the fact that I have defined it to be attached to the neighbouring zone.  

I've posted two models to demonstrate this phenomenon.  
1) A 6m wide by 5m deep by 3m high zone.
2) Exact same except split into two equal zones with a interzonal window seperating them.  

In reality the second case should be marginally darker, since the glass will absorb some light.  The results are far from what I would have expected.

If anyone has experience with the detailed daylighting model, their comments would be greatly appreciated.

Thanks in advance.

Liam O'Brien


The primary EnergyPlus web site is found at:

The group web site is:

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:

<*> Your email settings:
    Individual Email | Traditional

<*> To change settings online go to:
    (Yahoo! ID required)

<*> To change settings via email:

<*> To unsubscribe from this group, send an email to:

<*> Your use of Yahoo! Groups is subject to: