Measurement of materials emissivity - Influence of the procedure

• Type: Article in International Conference Proceedings Book
• Date: 2015

Authors

E. Barreira (Author) FEUP; E. Bauer (Author) Other; N. Mustelier (Author) FEUP; V. P. Freitas (Author) FEUP

Conference proceedings International

Title: AITA 2015 ¿ 13th International Workshop on Advanced Infrared Technology & Applications

Pages: 242-245

Scientific classification

CORDIS: Technological sciences > Engineering > Civil engineering

FOS: Engineering and technology > Civil engineering

Other information

Abstract (EN): Emissivity is one of the parameters that most influence measurements by infrared thermography, as it rules the effective radiation emitted by the surface, regarding the black body. For in situ measurements, the surface emissivity is defined using black tape with known emissivity. The tape is glued over a portion of the surface under study and its temperature is measured considering the tape emissivity. The surface emissivity is adjusted by equating the temperatures of the tape and of the surface near it. In this work the accuracy of this method was evaluated, by comparison with measurements made with an emissometer. The emissivity of ten different materials commonly used in buildings was assessed , considering a black tape of well-known emissivity.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 4