Computer Reduction Of Aerial Thermograms For Large Scale Energy Audits

William R Hazard

doi:10.1117/12.959529

27 January 1981 Computer Reduction Of Aerial Thermograms For Large Scale Energy Audits

William R Hazard

Proceedings Volume 0254, Thermal Infrared Sensing Applied to Energy Conservation in Building Envelopes: Thermosense III; (1981) https://doi.org/10.1117/12.959529
Event: Thermal Infrared Sensing Applied to Energy Conservation in Building Envelopes (Thermosense III), 1980, Minneapolis, United States

Abstract

A 32 kilobyte microcomputer is used for merging radiant (IR) temperatures of roof sections and building enclosures with meteorological data to produce per unit Energy Intensity Factors (EIFs) that are required for Comprehensive Energy planning. The EIFs can also be used as building blocks for a low cost RCS-type energy audit that has been shown to approximate the DOE model audit in terms of accuracy and completeness. The Type I or "Interactive Energy Audit" utilizes EIFs that are calculated from diffuse density levels of aerial IR recordings, supplemented by resident-supplied information concerning structural charac-teristics of a house and energy life-style of its occupants. Results of a statistical comparison between ASHRAE-based and IR audits of 175 single family homes in Garland, Texas show that, on the average, the aerial based heat loss estimates fall within a 10 percent error envelope around the true BTUH losses 90 percent of the time. The combination of an aerial infrared picture and an Interactive Energy Audit print-out have proven effective in (a) providing homeowners with the information they want from an energy audit; (b) persuading them to take appropriate remedial weatherization actions, and (c) screening out the homes that do not need a Class A audit, thereby eliminating the cost and bother of an on-site inspection.

Citation Download Citation

William R Hazard "Computer Reduction Of Aerial Thermograms For Large Scale Energy Audits", Proc. SPIE 0254, Thermal Infrared Sensing Applied to Energy Conservation in Building Envelopes: Thermosense III, (27 January 1981); https://doi.org/10.1117/12.959529

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