< back to main site

Publications

Report on hot box measurements made of two 1.48m x 1.23m glazed, calibrated reference panels as specified in ISO/CD 12567 and CEN/TC 89 WI 26 part 2 03.1995.

Williams, R G; Hall, D A (1995) Report on hot box measurements made of two 1.48m x 1.23m glazed, calibrated reference panels as specified in ISO/CD 12567 and CEN/TC 89 WI 26 part 2 03.1995. NPL Report. QM 115

[img] Text
QM115.pdf

Download (129kB)

Abstract

This report outlines the principles of draft CEN standard procedures for measuring the U-value of windows and window components in a hot box. The constructional details of the glazed calibration panels, required by those standards, are described and the methods used to calculate their thermal performance are given. Details of the hot box measurements made with those panels, as specified in the draft CEN standards, are included. The graphs produced from these data, required for any subsequent hot box measurements of window systems to achieve the following; normalise the U-value to standard surface resistances, derive the heat flux density through the test element and to calculate the environmental temperatures, are also included. Finally, the sensitivity to the calibration measurement results, of subsequent U-value measurements, are discussed.

Item Type: Report/Guide (NPL Report)
NPL Report No.: QM 115
Subjects: Engineering Measurements
Engineering Measurements > Thermal
Last Modified: 02 Feb 2018 13:19
URI: http://eprintspublications.npl.co.uk/id/eprint/461

Actions (login required)

View Item View Item