D2+Daylighting+Design+Performance

__Daylighting design performance__

Since the building is facing in the northeastern direction and is located in front of a 8 story building, it will receive a lot of shade and cooling during the summer time. Also during the winter time, the building will receive a lot of sunlight.

AN OVERCAST SKY OR A "MIRROR SKY" TEST ROOM, LIGHT IS DIFFUSE AND UNIFORMLY DISTRIBUTED AT ANY GIVEN TIME. OVERCAST SKY LUMINANCE DOES VARY IN INTENSITY WITH SOLAR ALTITUDE. BY KNOWING THE ALTITUDE OF THE SUN, AVAILABLE FOOTCANDLES ON A HORIZONTAL SURFACE CAN BE DIRECTLY PREDICTED. FROM THIS KNOWLEDGE OF AVAILABLE FC, THE INTERIOR LIGHT ON A TASK SURFACE CAN BE CONTROLLED BY PROVIDING AN APPROPRIATELY SIZED DAYLIGHTING APERTURE AND INCORPORATING CONTROLS SUCH AS GLAZING SELECTION AND SHADING DEVICES. FINALLY, DIRT ACCUMULATION HAS TO BE ACCOUNTED FOR IN ESTIMATING THE AMOUNT OF ILLUMINATION WHICH WOULD BE RECEIVED. THIS TEMPLATE ALLOWS THE INVESTIGATION OF LIGHT LEVELS FOR ANY DAY OF THE YEAR AT ANY LATITUDE. THE REFERENCE TAB HAS INFORMATION ON APPROXIMATE GLAZING AREAS REQUIRED TO PROVIDE A RANGE OF DAYLIGHT FACTORS AS WELL AS GLAZING DATA AND DIRT LEVEL APPROXIMATION FOR DIFFERENT ENVIRONMENTS.

This overcast sky horizontal luminance graph show different times of the year and how the Daylight Factor, Annual Foot Candle Levels and Glazing area ratios are affected

December: July: March:

Guideline

The areas that have the least shade are the outdoor eating area and the outdoor lobby. 