Blog 4 - electrical systems

Over the past couple weeks I have been researching daylighting and interior lighting methods for our cafe.  Working with the LEED consultants, we have determined that daylighting will have a large effect on the lighting design for the space.  By placing large windows at the front of the building, we hope to minimize the amount of electrical light necessary during the day.  To implement this, open loop system solar sensors will measure the daylight and control the electric lighting.  A uniform lighting level will be maintained.

Light and heat gain can also be controlled through windows.  Thermochromic glass darkens when it is warmed by the sun,  Photochromic glass turns darker when exposed to bright light, and electrochromic glass is controlled by an electronic switch that adjusts its darkness.  In our cafe, photochromic glass may be beneficial for the south facing windows.

I will also consider use of "smart" automated interior shading devices.  These blinds or shades respond to changing solar conditions using sensors.  Light shelves may also be installed to maximize light exposure indoors.  Combined with exterior overhangs, heat gain is reduced, especially during the summer months.
Another important design consideration is the appliances and equipment.  We will be sure to specify products that have an "Energy Star" rating.

Stephanie Hill
Electrical Engineer