This paper summarizes the results of a simulation analysis to determine the effectiveness of daylighting in reducing electrical energy consumption for office buildings in Egypt. Specifically, the impact on daylighting performance is investigated of window size, building size, daylighting control, and glazing type for three geographical locations in Egypt. It was determined that a window to wall area ratio of 0.20 minimizes the total annual electricity use for office buildings in three Egyptian locations, Cairo, Alexandria, and Aswan. A simplified analysis method is developed based on the analysis results to estimate the annual electrical energy savings attributed to daylighting.

1.
Housing and Building Research Center
,
Organization for Energy Planning
, and
PA Consulting Group
, “
Energy Efficiency Residential Building Draft Code
,” prepared for the Ministry of Housing, Utilities and Urban Communities, and Ministry of Electricity and Energy, Arab Republic of Egypt (2003).
2.
Erhorn
,
H.
, and
Szerman
,
M.
,
Documentation of the Software Package
, ADELINE, Stuttgart, Germany, 1994.
3.
LBL, SUPERLITE software, http://eetd.lbl.govhttp://eetd.lbl.gov, Lawrence Berkeley Lab, US Department of Energy, Berkeley, CA, 1993.
4.
DOE
, DOE-21E Daylighing Supplement, Lawrence Berkeley Lab, US Department of Energy, Berkeley, CA, 1993.
5.
ASHRAE/IESNA Standard 90.1-1999. American Society of Heating, Refrigerating, and Air Conditioning Engineers, Atlanta, GA., 1999.
6.
The IESNA Lighting Handbook: Reference and Application
,
9th ed.
, edited by
Mark S.
Rea
,
Illuminating Engineering Society of North America
, New York, (2000, Chap. 10.
7.
Krarti
,
M.
,
Erickson
,
P.
, and
Hillman
,
T.
, “
A Simplified Method to Estimate Energy Daylighting of Artificial Lighting Use from Daylighting
Build. Environ.
0360-1323
40
, pp.
747
754
.
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