Roof Integrated Solar Absorbers: The Measured Performance of 'Invisible' Solar Collectors; Preprint

    Research output: Contribution to conferencePaper


    The Florida Solar Energy Center (FSEC), with the support of the National Renewable Energy Laboratory, has investigated the thermal performance of solar absorbers that are an integral, yet indistinguishable, part of a building's roof. The first roof-integrated solar absorber (RISA) system was retrofitted into FSEC's Flexible Roof Facility in Cocoa, Florida, in September 1998. This'proof-of-concept' system uses the asphalt shingle roof surface and the plywood decking under the shingles as an unglazed solar absorber. Data was gathered for a one-year period on the system performance. In Phase 2, two more RISA prototypes were constructed and submitted for testing. The first used the asphalt shingles on the roof surface with the tubing mounted on the underside of the plywooddecking. The second prototype used metal roofing panels over a plywood substrate and placed the polymer tubing between the plywood decking and the metal roofing. This paper takes a first look at the thermal performance results for the 'invisible' solar absorbers that use the actual roof surface of a building for solar heat collection.
    Original languageAmerican English
    Number of pages12
    StatePublished - 2001
    EventSolar Forum 2001 - Washington, D.C.
    Duration: 21 Apr 200125 Apr 2001


    ConferenceSolar Forum 2001
    CityWashington, D.C.

    NREL Publication Number

    • NREL/CP-610-30848


    • roof-integrated solar collectors
    • solar collectors


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