BS EN ISO 13791:2012
$215.11
Thermal performance of buildings. Calculation of internal temperatures of a room in summer without mechanical cooling. General criteria and validation procedures
| Published By | Publication Date | Number of Pages |
| BSI | 2012 | 110 |
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 11 | 1 Scope 2 Normative references |
| 12 | 3 Terms, definitions, symbols and units 3.1 Terms and definitions |
| 13 | 3.2 Symbols and units |
| 15 | 3.3 Subscripts |
| 16 | 4 Determination of internal temperatures 4.1 Assumptions 4.2 Evaluation of the relevant temperatures 4.2.1 Internal air temperature |
| 17 | 4.2.2 Internal surface temperature |
| 18 | 4.2.3 Surface delimiting two solid layers 4.2.4 Surface of an air layer |
| 19 | 4.2.5 External surface of a room element 4.2.6 Relevant temperatures for special construction elements 4.2.6.1 Ceiling below an attic |
| 20 | 4.2.6.2 Floor on ground 4.2.6.3 Floor over cellar 4.2.6.4 Floor over crawl space 4.2.6.5 Glazed element 4.3 Room thermal balance |
| 21 | 4.4 Boundary conditions 4.4.1 Single room 4.4.2 Similar rooms 4.4.2.1 Partition (vertical) wall |
| 22 | 4.4.2.2 Ceiling/floor |
| 24 | 4.4.3 Adjacent room with defined value of the air temperature |
| 25 | 4.4.4 Floor on ground 4.4.5 Cellar or crawl space 4.4.6 Ceiling below attic 4.5 Terms in the thermal balance equations 4.5.1 Heat conduction through components |
| 26 | 4.5.2 Convective heat transfer 4.5.2.1 General 4.5.2.2 Convective heat flow rateat the surfaces of an element |
| 27 | 4.5.2.3 Convective heat transfer through unventilated air layers |
| 28 | 4.5.2.4 Convective heat transfer through ventilated air layer |
| 29 | 4.5.3 Short-wave radiation heat transfers 4.5.3.1 Short-wave radiation heat transfer at the external surface of opaque element |
| 30 | 4.5.3.2 Short-wave radiation heat transfer at the internal surface of opaque elements |
| 31 | 4.5.3.3 Short-wave radiation heat flow rate for transparent elements (including blinds and curtains) |
| 33 | 4.5.3.4 Solar to air heat flow rate 4.5.3.5 Sunlit area of room element 4.5.4 Long-wave radiation heat transfer 4.5.4.1 Heat flow rate at the external surface |
| 34 | 4.5.4.2 Heat flow rate at the internal surface |
| 35 | 4.5.4.3 Air layers 4.5.5 Internal gains |
| 36 | 4.5.6 Heat flow due to ventilation 4.5.6.1 General 4.5.6.2 Natural ventilation 4.5.6.3 Mechanical ventilation |
| 37 | 5 Determination of internal humidity 6 Procedure for carrying out calculations 6.1 General 6.2 Design climatic data 6.2.1 General |
| 38 | 6.2.2 Long-period design climatic data 6.2.3 Design warm sequence 6.3 Geometrical and thermophysical characteristics of room elements 6.4 Design internal gains 6.5 Design occupant behaviour |
| 39 | 6.6 Calculation procedure 6.6.1 General 6.6.2 Definition of the starting conditions 6.6.3 Prediction of the internal temperatures 7 Report of the calculation |
| 40 | 8 Validation procedures 8.1 Introduction 8.2 Validation of heat transfer processes 8.2.1 General 8.2.2 Heat conduction through opaque elements |
| 42 | 8.2.3 Internal long-wave radiation exchanges |
| 44 | 8.2.4 Sunlit area of a window due to external obstructions |
| 47 | 8.3 Validation procedure for the whole calculation method 8.3.1 General |
| 48 | 8.3.2 Geometry for the test rooms |
| 49 | 8.3.3 Thermophysical properties of opaque walls 8.3.4 Properties of glazing |
| 51 | 8.3.5 Solar parameters |
| 52 | 8.3.6 Boundary conditions |
| 55 | 8.3.7 Internal energy sources |
| 56 | 8.3.8 Ventilation 8.3.9 Descriptions of the validation tests 8.3.9.1 General |
| 57 | 8.3.9.2 Results of validations |
