Radiation control coatings on rough-surfaced roofs at a federal facility: Two summers of monitoring plus roof and whole building modeling

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Description

Support of the federal New Technology Demonstration Program (NTDP) allowed the authors to learn the effect of radiation control coatings on roofs at a federal facility in the Panhandle of Florida. Two rough-surfaced, moderately well-insulated, low solar reflectance built-up roofs (BURs) were spray coated with a white, latex-based product with ceramic beads. Samples of the coated roofs were brought periodically to the laboratory to measure the solar reflectance as the coatings weathered. The authors monitored the power demand of the all-electric buildings that the roofs covered and temperatures and heat fluxes for two instrumented areas on each roof. Average decreases ... continued below

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34 p.

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Petrie, T.W.; Childs, P.W. & Christian, J.E. January 1, 1998.

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Description

Support of the federal New Technology Demonstration Program (NTDP) allowed the authors to learn the effect of radiation control coatings on roofs at a federal facility in the Panhandle of Florida. Two rough-surfaced, moderately well-insulated, low solar reflectance built-up roofs (BURs) were spray coated with a white, latex-based product with ceramic beads. Samples of the coated roofs were brought periodically to the laboratory to measure the solar reflectance as the coatings weathered. The authors monitored the power demand of the all-electric buildings that the roofs covered and temperatures and heat fluxes for two instrumented areas on each roof. Average decreases in the sunlit temperatures of the coated vs. the uncoated surfaces show weathering effects. They also show that the shading enhanced the effect of the coating on the significantly shaded roof because the coated instrumented area on it was preferentially shaded near noon of sunny days. Whole building models were constructed for DOE 2.1E and model predictions were compared to measurements of total electrical power for each all-electric building. The building with the significantly shaded roof had very high internal loads. The effect of the shading on annual energy use for cooling was twice that of the coating but the coating decreased annual cooling energy needs only by 0.5%. The building with the heavyweight concrete-decked roof had small internal loads. For it, the DOE 2.1E model predicted a 7.4% decrease in annual cooling energy use due to the coating and a comparatively small effect of the less extensive shading.

Physical Description

34 p.

Notes

OSTI as DE98004868

Source

  • 1998 ASHRAE summer annual meeting, Toronto (Canada); Clearwater Beach, FL (United States), 20 Jun 1998; 7-11 Dec 1998

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  • Other: DE98004868
  • Report No.: ORNL/CP--97535
  • Report No.: CONF-980650--;CONF-981201--
  • Grant Number: AC05-96OR22464
  • DOI: 10.2172/292836 | External Link
  • Office of Scientific & Technical Information Report Number: 292836
  • Archival Resource Key: ark:/67531/metadc684118

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Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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Creation Date

  • January 1, 1998

Added to The UNT Digital Library

  • July 25, 2015, 2:20 a.m.

Description Last Updated

  • Nov. 3, 2016, 6:53 p.m.

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Petrie, T.W.; Childs, P.W. & Christian, J.E. Radiation control coatings on rough-surfaced roofs at a federal facility: Two summers of monitoring plus roof and whole building modeling, report, January 1, 1998; Tennessee. (digital.library.unt.edu/ark:/67531/metadc684118/: accessed November 25, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.