Energy factors and temperature distribution in insulated built-up roofs. Technical note July 1977-January 1980

Technical Report · Sun Feb 01 00:00:00 EST 1981

OSTI ID:5484567

Keeton, J R; Alumbaugh, R L

Surface temperatures of 4-ply built-up roofs insulated with (1) 1 inch of perlite (R = 2.8) and 2-1/2 inches of urethane (R = 19.2) and (2) 1 inch of urethane (R = 7.1) and 1-7/8 inches of glass fiber (R = 7.7) are presented. Energy factors are shown in terms of temperature-time areas defined as solar heat response, cooling (heating) required, radiative cooling, and insulation efficiency. Results indicate that for a black surface, solar heat response is significantly higher in the roof portion with the higher R-value. Solar heat response is directly affected by color of surfacing; lowest to highest values were found with white, white gravel, gray gravel, aluminum-gray, and black. Recommendations are given for reducing surface temperatures of insulated built-up roofs.

• Research Organization: Civil Engineering Lab. (Navy), Port Hueneme, CA (USA)
• OSTI ID: 5484567
• Report Number(s): AD-A-103073/3; CEL-TN-1600
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
ROOFS
HEAT GAIN
RADIATIVE COOLING
TEMPERATURE DISTRIBUTION
BUILDINGS
CONTROLLED ATMOSPHERES
ENERGY CONSERVATION
FOAMS
PEARLITE
TEMPERATURE CONTROL
THERMAL INSULATION
THICKNESS
URETHANE
ATMOSPHERES
CARBAMATES
CARBONIC ACID DERIVATIVES
CARBOXYLIC ACID SALTS
COLLOIDS
CONTROL
COOLING
DIMENSIONS
DISPERSIONS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
320100* - Energy Conservation
Consumption
& Utilization- Buildings