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BS ISO 9869-2:2018+A1:2021

BS ISO 9869-2:2018+A1:2021

$167.15

Thermal insulation. Building elements. In-situ measurement of thermal resistance and thermal transmittance – Infrared method for frame structure dwelling

Published By Publication Date Number of Pages
BSI 2021 38
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This document describes the infrared method for measuring the thermal resistance and thermal transmittance of opaque building elements on existing buildings when observing high emissivity diffuse surface using an infrared (IR) camera. This document demonstrates a screening test by quantitative evaluation to identify the thermal performance defect area of building elements.

This document aims to measure the thermal transmittance (U-value) of a frame structure dwelling with light thermal mass, typically with a daily thermal capacity calculated according to ISO 13786 below 30 kJ/(m2K).

PDF Catalog

PDF Pages PDF Title
2 National foreword
6 Foreword
7 Introduction
9 1 Scope
2 Normative references
3 Terms and definitions
10 4 Symbols and units
11 5 Principle
12 6 Requirements for apparatus
6.1 General
6.1.1 Infrared camera.
6.1.2 Heat transfer coefficient sensor.
6.1.3 ET sensor.
6.1.4 Thermocouple thermometer.
6.1.5 Data logger.
13 6.2 Infrared camera
14 6.3 Heat transfer coefficient sensor
6.4 ET sensor
6.5 Thermocouple
6.6 Data logger
7 Measurement method
7.1 Building
7.2 Location of the measured area
15 7.3 Measurement conditions
7.4 Measurement of heat transfer coefficient
7.5 Measurement of environmental temperature
16 7.6 Surface temperature distribution of building elements
7.7 Measurement time and measurement interval
7.8 Measurement terms
17 7.9 Measurement period
8 Calculations
8.1 Heat transfer area
8.2 Calculation of heat flow rate
18 8.3 Calculation of thermal transmittance
9 Measurement accuracy
10 Test reports
20 Annex A (informative) Measurement principle
24 Annex B (informative) Calculation of environmental temperature, structure of ET sensor
27 Annex C (informative) Structure and calibration of heat transfer coefficient sensor
31 Annex D (informative) Uncertainty analysis
33 Annex E (informative) The calculation example of uncertainty analysis
37 Bibliography

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BS ISO 9869-2:2018+A1:2021
$167.15