Measured energy savings from the application of reflective roofs in two small non-residential buildings

被引:107
作者
Akbari, H [1 ]
机构
[1] Univ Calif Berkeley, Lawrence Berkeley Lab, Heat Isl Grp, Environm Energy Technol Div, Berkeley, CA 94720 USA
关键词
D O I
10.1016/S0360-5442(03)00032-X
中图分类号
O414.1 [热力学];
学科分类号
摘要
Energy use and environmental parameters were monitored in two small (14.9 m(2)) non-residential buildings during the summer of 2000. The buildings were initially monitored for about 1 1/2 months to establish a base condition. The roofs of the buildings were then painted with a white coating and the monitoring was continued. The original solar reflectivities of the roofs were about 26%; after the application of roof coatings the reflectivities increased to about 72%. The monitored electricity savings were about 0.5 kWh per day (33 Wh/m(2) per day). The estimated annual savings are about 125 kWh per year (8.4 kWh/m(2)); at a cost of $0.1/kWh, savings are about $0.86/m(2) per year. Obviously, it costs significantly more than this amount to coat the roofs with reflective coating, particularly because of the remote locations of these buildings. However, since the pre-fabricated roofs are already painted green at the factory, painting them a white (reflective) color would bring no additional cost. Hence, a reflective roof saves energy at no incremental cost. Published by Elsevier Science Ltd.
引用
收藏
页码:953 / 967
页数:15
相关论文
共 14 条
[1]   Peak power and cooling energy savings of high-albedo roofs [J].
Akbari, H ;
Bretz, S ;
Kurn, DM ;
Hanford, J .
ENERGY AND BUILDINGS, 1997, 25 (02) :117-126
[2]  
Akbari H., 1998, ASHRAE T, V104, P984
[3]  
Akridge J., 1998, ASHRAE TECHNICAL DAT, V14
[4]  
BOUTWELL C, 1986, BUILDING FUTURE PHAS
[5]  
GARTLAND LM, 1996, P 1996 ACEEE SUMM ST, V4, P117
[6]  
Hildebrandt E., 1998, ASHRAE TECHNICAL DAT, V14
[7]  
Konopacki S., 2000, P ACEEE SUMM STUD EN, V9
[8]  
Konopacki S., 1998, LBNL40673
[9]  
Konopacki S., 1997, LBNL39433
[10]  
Konopacki S., 1998, LBNL41834