- Author
- Persson, H. | Martensson, U. | Hermodsson, T. | Tuovinen, H.
- Title
- Devices for Measuring the Heat Flux From the Unexposed Side of Objects During Furnace Testing: SMT Project FIRESCAL.
- Coporate
- Swedish National Testing and Research Institute, Boras, Sweden
- Report
- SP Technical Notes 1998:35; SP AR 1998:35, 1998, 32 p.
- Keywords
- furnaces | heat flux | measuring instruments | sensors
- Identifiers
- furnace testings; calibration element; heat flux meters
- Abstract
- Different methods for measuring the heat flux from the unexposed side of a specimen during furnace testing have been investigated. The different methods are described and results from test trials are reported. Three different methods are developed within the present project. In addition, two commercially available heat flux devices have been tested. The methods developed in this project are, a modified version of the calibration element for furnace testing (WP2), and two different devices termed a passive (WP5) and an active heat flux meter (WP6). Experience with the different methods is summarised and recommendations for their use in practical testing situations are given. It is concluded that the objectives of the work packages have been met. The calibration element itself can be used in estimating the varying heat flow conditions at different laboratories and on different occasions. The heat flux obtained in this way is not, however, equivalent to the flux leaving the test specimen. Two of the methods turn out to be superior when measuring the heat flux from a specimen. One of these methods is a commercially available sensor developed by TNO. This sensor has also been selected as the most appropriate passive device in WP5. It is recommended that this sensor be used in the future work.