Spectral measurements of infrared sky radiance

Conference · Mon Jan 01 04:00:00 EST 1979

OSTI ID:6323201

Berdahl, P; Martin, M

Recent measurements of the thermal infrared radiance of the sky are presented, showing the spectral distribution of radiation from the zenith. Samples of the data are compared with computer calculations for similar meteorological conditions. Computer calculations are based on the computer program LOWTRAN 3B. In general, the data confirm expectations that Tucson, with clear skies and dry air, is a good location for infrared radiative cooling systems. For an idealized selective surface at 25/sup 0/C the average cooling rate would have been 89 w/m/sup 2/ in Tucson (8/14/78 to 10/5/78), and 65 w/m/sup 2/ in San Antonio (9/21/78 to 10/6/78). If this idealized selective surface were allowed to cool down, it would reach an average temperature of -21/sup 0/C in Tucson and -7/sup 0/C in San Antonio.

• Research Organization: California Univ., Berkeley (USA). Lawrence Berkeley Lab.
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 6323201
• Report Number(s): LBL-8778; CONF-790118-3
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
140100* -- Solar Energy-- Resources & Availability
140901 -- Solar Thermal Utilization-- Space Heating & Cooling
ARIZONA
BUILDINGS
COMPUTER CALCULATIONS
COOLING
EARTH ATMOSPHERE
ELECTROMAGNETIC RADIATION
ENERGY BALANCE
ENERGY TRANSFER
HEAT TRANSFER
INFRARED RADIATION
INFRARED SPECTRA
NORTH AMERICA
RADIATIONS
RADIATIVE COOLING
SOUTHWEST REGION
SPECTRA
TEXAS
USA
WESTERN REGION