TY - GEN
T1 - Cool roofs and thermal insulation
T2 - 10th International Conference on Thermal Performance of Exterior Envelopes of Whole Buildings 2007
AU - Bianchi, Marcus V.A.
AU - Desjarlais, André O.
AU - Miller, William A.
AU - Petrie, Thomas W.
N1 - Publisher Copyright:
© 2007, American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc.
PY - 2007
Y1 - 2007
N2 - Cool roofs are defined by the Cool Roof Rating Council as a product with solar reflectivity of at least 0.70 and infrared emissivity of at least 0.75. In its 2005 revision, Title 24, California Energy Efficiency Standards for Residential and Nonresidential Buildings, cool roofs are prescribed in the standard non-residential building. While cool roofs decrease the solar gain of buildings, thus lowering cooling energy demand, additional insulation also does it. This work investigates the levels of insulation required with a black roof to accomplish the same cooling energy demand that cool roofs have with minimum insulation requirements. Both total and peak energy demands are considered and the levels of insulation to accomplish them are different. Oak Ridge National Laboratory’s Simplified Transient Analysis of Roofs (STAR) computer code was used to predict the transient heat gain and structure temperatures. The 16 Climate Zones in California were used, as well as the minimum insulation requirements dictated by 2005 Title 24 legislation. The results were compared with the results predicted by the overall envelope approach of the legislation.
AB - Cool roofs are defined by the Cool Roof Rating Council as a product with solar reflectivity of at least 0.70 and infrared emissivity of at least 0.75. In its 2005 revision, Title 24, California Energy Efficiency Standards for Residential and Nonresidential Buildings, cool roofs are prescribed in the standard non-residential building. While cool roofs decrease the solar gain of buildings, thus lowering cooling energy demand, additional insulation also does it. This work investigates the levels of insulation required with a black roof to accomplish the same cooling energy demand that cool roofs have with minimum insulation requirements. Both total and peak energy demands are considered and the levels of insulation to accomplish them are different. Oak Ridge National Laboratory’s Simplified Transient Analysis of Roofs (STAR) computer code was used to predict the transient heat gain and structure temperatures. The 16 Climate Zones in California were used, as well as the minimum insulation requirements dictated by 2005 Title 24 legislation. The results were compared with the results predicted by the overall envelope approach of the legislation.
UR - http://www.scopus.com/inward/record.url?scp=84969358521&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:84969358521
T3 - Thermal Performance of the Exterior Envelopes of Whole Buildings
BT - Buildings X
PB - American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE)
Y2 - 1 January 2007 through 1 January 2007
ER -
