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Feasibility of determining flat roof heat losses using aerial thermographyThe utility of aerial thermography for determining rooftop heat losses is investigated. Actual rooftop heat losses were obtained both from in-situ instrumentation of test roofs with known thermal resistances and aerial thermography obtained from overflights at an altitude of 305 m. It is found that the roof heat losses calculated using the remotely determined roof temperature agreed to within 17% of those calculated from ground measurements. However it is noted that an acceptable quantitative determination of roof heat losses using aerial thermography is only feasible when the convective term is accurately known or minimized. In addition, the sensitivity of the heat loss determination to environmental conditions is also evaluated. Finally, the analysis shows that the most reliable determinations can probably be obtained under conditions of total cloud cover with low wind speeds and at low ambient temperatures.
Document ID
19790067082
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Bowman, R. L.
(NASA Lewis Research Center Cleveland, OH, United States)
Jack, J. R.
(NASA Lewis Research Center Cleveland, Ohio, United States)
Date Acquired
August 9, 2013
Publication Date
April 1, 1979
Subject Category
Earth Resources And Remote Sensing
Meeting Information
Meeting: University of Michigan, International Symposium on Remote Sensing of Environment
Location: Ann Arbor, MI
Start Date: April 23, 1979
End Date: April 27, 1979
Sponsors: University of Michigan
Accession Number
79A51095
Distribution Limits
Public
Copyright
Other

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