Tip: don't use PixelCounting in combination with Transmittance Schedule

Hi all,

Just thought I’d post the following, which I found out after a lot of trouble shooting, to save someone having to do the same :slight_smile:

When using HB shades with an EP Transmittance Schedule, make sure to also use PolygonClipping as a Calculation method in the HB Shadow Calculation. When using PixelCounting (which I set up at first because of the high number of shading surfaces present), it won’t account for any transmittance and see the surfaces as fully opaque throughout the year.

Kind regards,
Marc

This is good to know, @marctavenier . It sounds like this is a bug in EnergyPlus or it’s at least not the expected behavior. Did you open up an issue about this on the EnergyPlus GitHub so that one of the E+ developers could confirm?

I did now!

2 Likes