INTERNATIONAL STANDARD
Thermalbridgesinbuilding temperatures-Detailedcalculations construction-Heatflowsandsurface
Ponts thermiques dans les batiments-Flux thermiques ettemperatures superficielles - Calculs detailles
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@ ISO 2017 Published in Switzerland
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Contents
Page
Output.5.1 5.2 General description. 8 8
Output data and input data 8
6.1 6.2 Output data. Calculation time intervals. .8 96.3 Input data. 6
Modelling of the construction. 7.1 Dimension systems 67.2 Rules for modelling. 7.2.1 67.2.2 General. Cut-off planes for a 3-D geometrical model for calculation of total heat 67.2.3 flow and/or surface temperatures. Cut-off planes for a 2-D geometrical model. 11 67.2.4 7.2.5 Cut-off planes in the ground Periodic heat flows via the ground 127.2.6 Adjustments to dimensions. 13 137.2.7 7.2.8 Auxiliary planes. Quasi-homogeneous layers and materials. 15 157.3 Conditions for simplifying the geometrical model. 157.3.1 7.3.2 General Conditions for adjusting dimensions to simplify the geometrical model 15 167.3.3 Conditions for using quasi-homogeneous material layers to simplify the geometrical model. 17
8 Input data specifications. 20
8.2 8.1 Thermal conductivities of materials. General. 20 218.3 Surface resistances. 218.4 8.5 Boundary temperatures. Thermal conductivity of quasi-homogeneous layers. 21 218.6 Determining the temperature in an adjacent unheated rom. Equivalent thermal conductivity of air cavities. 218.7 22
Calculation method.9.1 Solution technique. 229.2 Calculation rules. 9.2.1 Heat flows between material cells and adjacent environment. 22 229.2.2 9.2.3 Solution of the formulae. Heat flows at cut-off planes. 22 229.2.4 Calculation of the temperature distribution. 23
10
Determination of thermal coupling coefficients and heat flow rate from 3-D calculations23
Two boundary temperatures unpartitionedmodel.10.1 10.2 Two boundary temperatures partitioned model. 23 23
10.3 More than two boundary temperatures. 2411 Calculations using linear and point thermal transmittances from 3-D calculations. 11.1 Calculation of thermal coupling coefficient. 25 2511.2 Calculation of linear and point thermal transmittances. 2512 Determination of thermal coupling coefficient heat flow rate and linear thermal transmittance from 2-D calculations. 2612.2 12.1 Two boundary temperatures. More than two boundary temperatures. 2612.3 Determination of the linear thermal transmittance. 26 2712.4 Determination of the linear thermal transmittance for wall/floor junctions. 12.4.1 All cases. 27 2712.4.2 12.4.3 Option A. Option B 2712.5 Determination of the external periodic heat transfer coefficient for ground floors. 31 2913 Determination of the temperature at the internal surface. 3213.1 Determination of the temperature at the internal surface from 3-D calculations. 13.1.1 Two boundary temperatures. 32 3213.2 Determination of the temperature at the internal surface from 2-D calculations. 13.1.2 More than two boundary temperatures 3213.2.1 Two boundary temperatures.Report 13.2.2 Three boundary temperatures.14 14.1 Input data. 3314.2 Output data. 14.2.1 General. 34 3414.2.2 Calculation of the heat transmission using the thermal coupling coefficient. Calculation of the surface temperatures using weighting factors. 3414.2.3 14.2.4 Additional output data. 34 3414.2.5 Estimate of error. 35Annex B (informative) Input and method selection data sheet - Default choices. Annex A (normative) Input and method selection data sheet - Template. 36Annex C (normative) Validation of calculation methods. .38 40Annex D (normative) Examples of the determination of the linear and pointthermal transmittances. 47Annex E (normative) Determination of values of thermal coupling coefficient and temperature weighting factor for more than two boundary temperatures. 50Bibliography 55
Foreword
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ISO 10211 was prepared by ISO Technical Committee ISO/TC 163 Thermal performance and energy usein the built environment Submittee SC 2 Calculation methodsin collaboration with theEuropeanCommittee for Standardization (CEN) Technical Committee CEN/TC 89 Thermal performance of buildings and building ponents in accordance with the Agrement on technical cooperation betweenISO and CEN (Vienna Agreement).
This second edition cancels and replaces the first edition (ISO 10211:2007) which has been technicallyrevised.
The changes in the second edition are mostly editorial. The standard has been re-drafted accordingto CEN/TS 16629:2014.
