Points out that electric lighting and its associated cooling requirement consume 30% to 50% of the energy used in a typical commercial building. Presents a strategy that reduces the annual costs of illumination by more than 70% without reducing worker productivity. Describes the example of 1620 m2 (17,400 ft2) two-storey commercial building, termed the ‘Zero Energy Building’ designed using load avoidance rather than using alternative sources of energy. The building incorporates a novel daylighting design that utilises beam radiation, thereby avoiding overheating, while simultaneously displacing over 70% of the annual electric lighting load. Novel aspects of the design are 1) a specular light shelf, an exterior reflector and an overhang over the view window, 2) advanced glazings and 3) evaporative cooling. The simple payback period for these measures is 13 years.
Citation: ASHRAE Journal, vol. 40, no. 5, May 1998
Product Details
- Published:
- 1998
- Number of Pages:
- 5
- File Size:
- 1 file , 400 KB
- Product Code(s):
- D-9219
