How to input Glass spectral and Incident Angle Transmittance and reflectance

asked 2021-09-30 03:01:50 -0600

it
123 ●4

updated 2022-02-06 12:15:31 -0600

__AmirRoth__

4436 ●5 ●17 http://bleedinggreenna...

In EnergyPlus, WindowMaterial: Glazing module has three parts to input Glass spectral and Incident Angle transmittancee, front reflectance, and back reflectance. Though, I cannnot find out a table to define such values. Does anyone know how to define and input values?

answered 2021-09-30 03:23:35 -0600

Petros Dalavouras

499 ●13 ●7

You can use WINDOW from LBNL to model your windows and then export an .idf file with all the values you need both for average and spectral data

edit flag offensive delete link

Comments

Thank you for your comments. When exported from WINDOW, the bottom three cells in WindowMaterial: Glazing are blank. This means WINDOW exported data has no information for the three cells. I am wondering to define these three cells.

it ( 2021-09-30 04:07:49 -0600 )edit

I'm sorry I didn't grasp your question at first. So you need to use Optical Data Type = SpectralAndAngle. In this case I'm afraid that I can only point you at the example file "SpectralAngularOpticalProperties_TableData" which in the description says: "This file does the basic test of window properties as a function of wavelength and incident angle based on Winklemann approach. Table data are used to input optical properties. Linear interpolation is performed to calculate optical properties with a given incident angle." My take from this is that you should probably calculate the angular

Petros Dalavouras ( 2021-09-30 11:22:35 -0600 )edit

properties of the spectral data you obtained from WINDOW so as to create the table. In the Engineering Reference you can find this method of calculation.

Petros Dalavouras ( 2021-09-30 11:27:35 -0600 )edit

add a comment

Your Answer

Please start posting anonymously - your entry will be published after you log in or create a new account.