First time here? Check out the Help page!

Question-and-Answer Resource for the Building Energy Modeling Community
Get started with the Help page
Ask Your Question
1

How to schedule inside face of the window with the solar gains

asked 6 years ago

R-Fujiwara's avatar

updated 6 years ago

Hello everybody,

I am trying to use Radiance to create the solar incidence values for the surface, and then fed in to EnergyPlus for simulation like previous question. link text

There's no problem in creating the schedule file, and I used SurfaceProperty:SolarIncidentInside object to calculate solar distribution. It seems that SolarIncidentInside object does not affect the diffuse solar radiation transmitted through the zone’s exterior windows, but it can be dealt with by setting the solar radiation absorption rate to 1 and subtracting that from the schedule.

But the problem I am facing is that I cannot figure out how to schedule inside face of the window with the solar gains. Using SurfaceProperty:SolarIncidentInside object, all the building surface can be scheduled with the solar gains, but it seems that Fenestration Surface can't.

(Although the amount of solar radiation (1) absorbed in the glass of the zone’s exterior and interior windows and (2) transmitted back out of the exterior windows is quite small, and the influence on room temperature is extremely small)

Does anyone know? Thank you in advance.

Preview: (hide)

1 Answer

Sort by » oldest newest most voted
1

answered 6 years ago

ComplexFenestrationProperty:SolarAbsorbedLayers should do what you want.

Preview: (hide)
link

Comments

I understood. Maybe SurfaceProperty:SolarIncidentInside object is intend to be used with complex fenestration. Thank you.

R-Fujiwara's avatar R-Fujiwara  ( 6 years ago )

Yes, that's true. You can use the LBNL Window program to export the full complex glazing properties for your window constructions. Or you can use very simple complex glazing descriptions since all of the window solar calculations will be overridden. I took the CmplxGlz_SchedSurfGains.idf example file and replace all of the (very large) matrix objects with two very simple ones and got exactly the same results. See github #6869 for the revised example file.

MJWitte's avatar MJWitte  ( 6 years ago )

Your Answer

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

Add Answer

Training Workshops

Careers

Question Tools

1 follower

Stats

Asked: 6 years ago

Seen: 294 times

Last updated: Jul 26 '18