Hello,
I'm running simulation wih EnergyPlus.
In order to apply ECMs, I'm trying to apply insulation films to each window.
The object I used is WindowMaterial:Shade, but I don't think my way is correct.
I have limited information (Available data include solar reflectance, visible reflectance/transmittance, and shading coefficient),
which is further complicating the situation.
Any help will be much appreciated.
Thank you.
_Jeong
p.s. BTW, I do not understand why there's no shading coefficient field in window-related objects.
Jeong,
Shading coefficient is an older term that has been gradually substituted
by the SHGC value. The object WindowMaterial:SimpleGlazingSystem allows
you to enter this value directly. A quick search around the web shows
that the SC should be around 1.15 * SHGC. But you should get some more
reliable information on this. Also, it is recommended that you use the
detailed input for windows and not the simple glazing system. If you
can, get a hold of the solar transmittance and conductivity of your
window and you should be able to use the detailed input.
Pedro.
I don't think a WindowMaterial:Shade will properly account for the film, I
would instead look into creating your window in the software WINDOW from
LBL. This software can model detailed layer-by-layer windows with frames and
full spectral data, which can then be exported into EnergyPlus.
http://windows.lbl.gov/software/window/window.html
Good luck and I hope you let us know your solution!
P.S. EnergyPlus talks about the SHGC or g-Value of windows, not shading
coefficients. You can convert between them.
Marcus Jones, LEED AP, M.Sc.