%0 Journal Article
%K cool roof
%K Heat Island
%A Hashem Akbari
%A Sarah E Bretz
%A Dan M Kurn
%A James W Hanford
%B Energy and Buildings
%D 1997
%G eng
%P 117-126
%R 10.1016/S0378-7788(96)01001-8
%T Peak power and cooling energy savings of high-albedo roofs
%V 25
%X <p>In the summers of 1991 and 1992, we monitored peak power and cooling energy savings from high-albedo coatings at one house and two school bungalows in Sacramento, California. We collected data on air-conditioning electricity use, indoor and outdoor temperatures and humidities, roof and ceiling surface temperatures, inside and outside wall temperatures, insolation, and wind speed and direction. Applying a high-albedo coating to one house resulted in seasonal savings of 2.2 kWh/d (80% of base case use), and peak demand reductions of 0.6 kW. In the school bungalows, cooling energy was reduced 3.1 kWh/d (35% of base case use), and peak demand by 0.6 kW. The buildings were modeled with the DOE-2.1E program. The simulation results underestimate the cooling energy savings and peak power reductions by as much as twofold.</p>