Design and prototype testing of a solar heating and cooling roof/collector/radiation module. Final technical report, 1 April 1980-31 March 1981
A test program was conducted to determine the potential of over 30 contemporary roof surfaces as solar collectors and nocturnal radiators. Color as well as material variations were involved, as well as several candidate thin-film glazings. Dark surfaces performed well for collection and radiation, while light or polished surfaces were satisfactory for radiation only. Two prototype roof/collector/radiator modules were built and tested to determine thermal performance. A corrugated galvanized steel module, tested with air and 40% ethylene glycol/water heat transfer fluids, yielded heat rejection rates as high as 65 Btu/h-ft/sup 2/, and under realistic summer night conditions the rates were 30 to 35 Btu/h-ft/sup 2/. The solar collection efficiency was 57% max. An asphalt roofing module was tested with and without a teflon glazing, using air only. The glazing aided solar collection, but had little effect on nocturnal radiation due to calm test conditions. The maximum solar collection efficiency was about 11%. The maximum heat rejection rate was 35 Btu/h-ft/sup 2/, and was 17 Btu/h-ft/sup 2/ under typical summer night conditions.
- OSTI ID:
- 6352113
- Report Number(s):
- NP-1904011; EMD-2-68-2228
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ROOFS
MATERIALS TESTING
RADIANT HEAT TRANSFER
SOLAR COLLECTORS
PERFORMANCE TESTING
AQUEOUS SOLUTIONS
ASPHALTS
COLOR
EFFICIENCY
GLAZING MATERIALS
GLYCOLS
PERFORMANCE
RADIATORS
SOLAR ABSORBERS
SOLAR AIR HEATERS
STEELS
TEFLON
AIR HEATERS
ALCOHOLS
ALLOYS
BITUMENS
DISPERSIONS
ENERGY TRANSFER
EQUIPMENT
FLUORINATED ALIPHATIC HYDROCARBONS
HALOGENATED ALIPHATIC HYDROCARBONS
HEAT EXCHANGERS
HEAT TRANSFER
HEATERS
HYDROXY COMPOUNDS
IRON ALLOYS
IRON BASE ALLOYS
MATERIALS
MIXTURES
OPTICAL PROPERTIES
ORGANIC COMPOUNDS
ORGANIC FLUORINE COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
ORGANIC POLYMERS
ORGANOLEPTIC PROPERTIES
OTHER ORGANIC COMPOUNDS
PETROCHEMICALS
PETROLEUM PRODUCTS
PHYSICAL PROPERTIES
PLASTICS
POLYETHYLENES
POLYMERS
POLYOLEFINS
POLYTETRAFLUOROETHYLENE
SOLAR EQUIPMENT
SOLUTIONS
SYNTHETIC MATERIALS
TAR
TESTING
141000* - Solar Collectors & Concentrators