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BS EN ISO 12241:2022

$198.66

Thermal insulation for building equipment and industrial installations. Calculation rules

Published By Publication Date Number of Pages
BSI 2022 66
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This document gives rules for the calculation of heat-transfer-related properties of building equipment and industrial installations, predominantly under steady-state conditions. This document also gives a simplified approach for the calculation of thermal bridges.

PDF Catalog

PDF Pages PDF Title
2 undefined
5 European foreword
Endorsement notice
9 Foreword
10 Introduction
12 1 Scope
2 Normative references
3 Terms, definitions and symbols
3.1 Terms and definitions
3.2 Symbols
14 3.3 Subscripts
15 4 Calculation rules and formulae of heat transfer
4.1 Fundamental formulae for heat transfer
4.1.1 General
4.1.2 Thermal conduction
20 4.1.3 Surface coefficient of heat transfer
27 4.1.4 External surface resistance
4.1.5 Thermal transmittance
29 4.1.6 Heat flow rate
4.1.7 Temperatures of the layer boundaries
30 4.2 Determination of the influence of thermal bridges
4.2.1 General
4.2.2 Insulation system related thermal bridges
4.2.3 Installation related thermal bridges
31 4.3 Determination of total heat flow rate for plane walls, pipes and spheres
4.4 Surface temperature
32 4.5 Prevention of surface condensation
33 5 Calculation of the temperature change in pipes, vessels, and containers
5.1 General
34 5.2 Longitudinal temperature change in a pipe
5.3 Temperature change and cooling times in pipes, vessels, and containers
35 6 Calculation of cooling and freezing times of stationary liquids
6.1 Calculation of the cooling time to prevent the freezing of water in a pipe
36 6.2 Calculation of the freezing time of water in a pipe
37 7 Calculation of heat loss for underground pipelines
7.1 General
7.2 Single line without channels
7.2.1 Uninsulated pipe
38 7.2.2 Insulated pipe
39 7.3 Other cases
40 Annex A (informative) Thermal bridges
54 Annex B (informative) Examples
63 Bibliography
BS EN ISO 12241:2022
$198.66