BS EN ISO 13370:2017
$198.66
Thermal performance of buildings. Heat transfer via the ground. Calculation methods
| Published By | Publication Date | Number of Pages |
| BSI | 2017 | 66 |
This document provides methods of calculation of heat transfer coefficients and heat flow rates for building elements in thermal contact with the ground, including slab‐on‐ground floors, suspended floors and basements. It applies to building elements, or parts of them, below a horizontal plane in the bounding walls of the building situated
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at the level of the inside floor surface, for slab‐on‐ground floors, suspended floors and unheated basements;
NOTE 1 In some cases, external dimension systems define the boundary at the lower surface of the floor slab.
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at the level of the external ground surface, for heated basements.
This document includes calculation of the steady‐state part of the heat transfer (the annual average rate of heat flow) and the part due to annual periodic variations in temperature (the seasonal variations of the heat flow rate about the annual average). These seasonal variations are obtained on a monthly basis and, except for the application to dynamic simulation programmes in Annex D, this document does not apply to shorter periods of time.
NOTE 2 Table 1 in the Introduction shows the relative position of this document within the set of EPB standards in the context of the modular structure as set out in ISO 52000-1.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 2 | National foreword |
| 4 | European foreword |
| 5 | Endorsement notice |
| 9 | Foreword |
| 10 | Introduction |
| 15 | 1 Scope 2 Normative references |
| 16 | 3 Terms and definitions |
| 17 | 4 Symbols and subscripts 4.1 Symbols 4.2 Subscripts |
| 18 | 5 Description of the method 5.1 Output 5.2 General description |
| 19 | 5.3 Periodic coefficients 6 Calculation of heat transfer via the ground 6.1 Output data |
| 20 | 6.2 Calculation time intervals |
| 21 | 6.3 Input data 6.4 Thermal properties 6.4.1 Thermal properties of the ground |
| 22 | 6.4.2 Thermal properties of building materials 6.4.3 Surface resistances 6.5 Internal temperature and climatic data 6.5.1 Internal temperature 6.5.2 Climatic data |
| 23 | 6.6 Thermal transmittance and heat flow rate 6.6.1 Thermal transmittance 6.6.2 Thermal bridges at edge of floor 6.6.3 Calculation of heat flow rate 6.6.4 Effect of ground water |
| 24 | 6.6.5 Special cases 6.7 Parameters used in the calculations 6.7.1 Characteristic dimension of floor |
| 25 | 6.7.2 Equivalent thickness 7 Calculation of thermal transmittances 7.1 Slab-on-ground floor |
| 27 | 7.2 Suspended floor |
| 29 | 7.3 Heated basement 7.3.1 General |
| 31 | 7.3.2 Basement floor 7.3.3 Basement walls |
| 32 | 7.3.4 Heat transfer from whole basement 7.4 Unheated basement |
| 33 | 7.5 Partly heated basement 7.6 Effective thermal resistance of floor construction |
| 34 | Annex A (normative) Input and method selection data sheet — Template |
| 37 | Annex B (informative) Input and method selection data sheet — Default choices |
| 40 | Annex C (normative) Calculation of ground heat flow rate |
| 46 | Annex D (normative) Slab-on-ground with edge insulation |
| 51 | Annex E (informative) Heat flow rates for edge and central regions of a building |
| 52 | Annex F (normative) Application to dynamic calculation programmes |
| 54 | Annex G (normative) Ventilation below suspended floors |
| 57 | Annex H (normative) Periodic heat transfer coefficients |
| 63 | Bibliography |
