Things to keep in mind when analyzing daylighting in AGi32

Accurate daylight analysis requires using the correct surface designation for exterior, but not interior, surfaces.

06/20/2013


The key to accurate daylight analysis using AGi32 is the assignment of the correct surface type designation to glazing and exterior surfaces. Interior surfaces require no special treatment. Daylighting calculations using AGi32 follow several important assumptions:

  • AGi32 considers the following daylight components: sunlight, skylight, and light reflected from a “virtual” ground plane.
  • Daylight can only be seen by an interior surface (interior of a room or object) after it has passed through a “daylight transition surface.” This is typically daylight transition glass.
  • All exterior surfaces must be classified as “daylight exterior surfaces” to accumulate daylight components.
  • “Daylight transition surfaces” will consider light reflected only from “daylight exterior surfaces.”
  • Daylight models must contain at least one “daylight transition surface” or “daylight exterior surface” in order to compute daylight component.
  • The virtual exterior ground surface is automatically assigned a reflectance of 18% (average reflectance of an exterior scene, by Eastman Kodak, circa 1904).  

With these ideas in mind, we can create any model, classify all exterior surfaces as “exterior daylight surfaces” and classify all glazing as “daylight transition glass.” All interior surfaces may remain single- or double-sided, as created using the room or object tools, or imported (imported surfaces become objects). 

Courtesy: AGI website (www.agi32.com)



No comments
The Engineers' Choice Awards highlight some of the best new control, instrumentation and automation products as chosen by...
The System Integrator Giants program lists the top 100 system integrators among companies listed in CFE Media's Global System Integrator Database.
The Engineering Leaders Under 40 program identifies and gives recognition to young engineers who...
This eGuide illustrates solutions, applications and benefits of machine vision systems.
Learn how to increase device reliability in harsh environments and decrease unplanned system downtime.
This eGuide contains a series of articles and videos that considers theoretical and practical; immediate needs and a look into the future.
Mobile HMI; PID tuning tips; Mechatronics; Intelligent project management; Cybersecurity in Russia; Engineering education; Road to IANA
Save energy with automation; Process control system upgrades; Dispelling controll myths; Time-sensitive networking; Control system integration; Road to IANA
Additive manufacturing advancements; Machine vision enhances robotics; Fieldbus evolution; Process safety; Advice from System Integrators of the Year; Road to IANA
This article collection contains several articles on the Industrial Internet of Things (IIoT) and how it is transforming manufacturing.

Find and connect with the most suitable service provider for your unique application. Start searching the Global System Integrator Database Now!

Flexible offshore fire protection; Big Data's impact on operations; Bridging the skills gap; Identifying security risks
The digital oilfield: Utilizing Big Data can yield big savings; Virtualization a real solution; Tracking SIS performance
Getting to the bottom of subsea repairs: Older pipelines need more attention, and operators need a repair strategy; OTC preview; Offshore production difficult - and crucial
click me