Overview

We often come across queries in relation to performing daylight calculations on Design Database CAD models, such as:

"How do I calculate Daylight factors with the Design Database program?"

Method

Daylight factors can be calculated through the link to the Nimbus program. (Please note that you must have an Electrical Designer license to use this functionality).

To do so, you must import your completed Design Database CAD model into Nimbus by clicking on the highlighted icon below:

This will bring you to the DDB Nimbus screen:

Then, to perform the daylight calculations:

• Select the relevant room under the Select Room tab.
• Click on any other tab to bring up the Nimbus room editor screen.
• To enable the daylight calculations, select Calc Type  > Daylight.
  
• Finally, select Calcs > Daylight, and choose the calculation type required. For example, 'Show daylight factor results' will produce the following results:

Please note:

• Daylight factors are evaluated on the working plane height, which is measured from the room's floor level. This should be defined in Design Database CAD Input>Room data (prior to importing to Nimbus), or under the Room Data tab on the Nimbus menu (after importing to Nimbus).
  
• The calculation accuracy can be changed by altering the number of points in the calculation grid (under the DDB Nimbus > Graphic data tab). More grid points will result in a higher degree of accuracy, but longer calculation times.

See Also

Product TechNotes and FAQs

Building Product TechNotes And FAQs

External Links

Bentley homepage

HevacompMechanical Designer

Bentley Technical Support KnowledgeBase

Bentley LEARN Server

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