Radiative cooling and solar heating potential by using various roofing materials

Conference · Mon Dec 01 04:00:00 EST 1980 · Alternative Energy Sources; (United States)

OSTI ID:6927437

Pytlinski, J T; Connell, H L; Conrad, G R

The results of testing over twenty typical and potential roofing materials such as: corrugated galvanized steel, corrugated clear fiberglass, 90number black roll roofing, 90number green roll roofing, 90number red roll roofing, 90number brown roll roofing, 90number white roll roofing, 240number brown asphalt shingles, anodized aluminum, etc. under exposure to solar and nocturnal sky radiation are presented. Some cadmium sulfite solar cells and silicon solar cells are being tested as potential future roofing panels. Graphs showing the temperature variation of each material versus testing time are given for a heating and a cooling cycle. The environmental conditions of testing such as: solar insolation, apparent sky temperature, ambient air temperature, relative humidity and wind speed are also given. On the basis of preliminary results obtained during the testing of roofing materials, several mini-modules of an integrated collector/radiator/ roof element with the dimensions 0.6 m x 0.6 m (2 ft x 2 ft) were constructed and tested. The thermal response of the mini-modules under solar and nocturnal sky radiation is shown and the testing results are discussed. The spectral transmittance curves for nine transparent cover materials are also presented. The preliminary results indicate that solar radiation and nocturnal sky radiation could be used effectively by employing an integrated collector/radiator structure.

• Research Organization: New Mexico State University, Las Cruces, New Mexico
• OSTI ID: 6927437
• Report Number(s): CONF-801210-
• Conference Information: Journal Name: Alternative Energy Sources; (United States) Journal Volume: 2
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
140501 -- Solar Energy Conversion-- Photovoltaic Conversion
140901* -- Solar Thermal Utilization-- Space Heating & Cooling
BUILDING MATERIALS
BUILDINGS
CADMIUM SULFIDE SOLAR CELLS
DATA
DIRECT ENERGY CONVERTERS
ENERGY SYSTEMS
EQUIPMENT
EXPERIMENTAL DATA
HEATING SYSTEMS
HOUSES
INFORMATION
MATERIALS
NOCTURNAL VARIATIONS
NUMERICAL DATA
OPTICAL PROPERTIES
PERFORMANCE TESTING
PHOTOELECTRIC CELLS
PHOTOVOLTAIC CELLS
PHYSICAL PROPERTIES
RADIATIONS
RESIDENTIAL BUILDINGS
ROOFS
SILICON SOLAR CELLS
SOLAR CELLS
SOLAR COLLECTORS
SOLAR COOLING SYSTEMS
SOLAR EQUIPMENT
SOLAR HEATING SYSTEMS
SOLAR RADIATION
SPECTRAL REFLECTANCE
SPECTRALLY SELECTIVE SURFACES
STELLAR RADIATION
SURFACES
TESTING
VARIATIONS