BS EN ISO 12241:2022 – TC
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Tracked Changes. Thermal insulation for building equipment and industrial installations. Calculation rules
| Published By | Publication Date | Number of Pages |
| BSI | 2022 | 174 |
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 |
|---|---|
| 110 | undefined |
| 113 | European foreword Endorsement notice |
| 117 | Foreword |
| 118 | Introduction |
| 120 | 1 Scope 2 Normative references 3 Terms, definitions and symbols 3.1 Terms and definitions 3.2 Symbols |
| 122 | 3.3 Subscripts |
| 123 | 4 Calculation rules and formulae of heat transfer 4.1 Fundamental formulae for heat transfer 4.1.1 General 4.1.2 Thermal conduction |
| 128 | 4.1.3 Surface coefficient of heat transfer |
| 135 | 4.1.4 External surface resistance 4.1.5 Thermal transmittance |
| 137 | 4.1.6 Heat flow rate 4.1.7 Temperatures of the layer boundaries |
| 138 | 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 |
| 139 | 4.3 Determination of total heat flow rate for plane walls, pipes and spheres 4.4 Surface temperature |
| 140 | 4.5 Prevention of surface condensation |
| 141 | 5 Calculation of the temperature change in pipes, vessels, and containers 5.1 General |
| 142 | 5.2 Longitudinal temperature change in a pipe 5.3 Temperature change and cooling times in pipes, vessels, and containers |
| 143 | 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 |
| 144 | 6.2 Calculation of the freezing time of water in a pipe |
| 145 | 7 Calculation of heat loss for underground pipelines 7.1 General 7.2 Single line without channels 7.2.1 Uninsulated pipe |
| 146 | 7.2.2 Insulated pipe |
| 147 | 7.3 Other cases |
| 148 | Annex A (informative) Thermal bridges |
| 162 | Annex B (informative) Examples |
| 171 | Bibliography |
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