Question-and-Answer Resource for the Building Energy Modeling Community
Get started with the Help page
Ask Your Question
2

specifying lighting in CBECC-Com

asked 2014-11-04 18:57:28 -0500

NORESCO gravatar image

What are the options for specifying lighting? Is lighting power density the only method used?

edit retag flag offensive close merge delete

2 Answers

Sort by ยป oldest newest most voted
1

answered 2014-11-05 11:43:30 -0500

cbecc gravatar image

Lights can be defined as a lighting power density or within a lighting system. The lighting system method allows the entry of luminaire types and the quantity of each type in the space. Each lighting system can be assigned to a daylit area type for use with daylighting controls: Skylit, the portion of the floor that receives daylight from a skylight; Primary Sidelit, portion of the floor that receives the highest amount of daylight from a window; Secondary Sidelit, portion of the floor that receives a lower, but still useful, amount of light from a window; or none for that portion of the space which is not daylit.

edit flag offensive delete link more
0

answered 2016-11-30 15:09:54 -0500

Is it possible to account for daylight dimming if using the lighting power density approach?

I have a project where the LPD has been specified equal to the allowance, the lighting is 100% controlled to a lux setpoint for each zone with daylit area (primary and secondary). I would expect the energy results to be close to the Standard model, but it's 34% WORSE.

The project has 100% dimmable LEDs with daylighting everywhere possible, and I'd like to take credit for that without having to specify every fixture in my simplified model.

edit flag offensive delete link more

Your Answer

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

Add Answer

 



Question Tools

1 follower

Stats

Asked: 2014-11-04 18:57:28 -0500

Seen: 91 times

Last updated: Nov 05 '14