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BS EN ISO 13791:2004

Superseded

Superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

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Thermal performance of buildings. Calculation of internal temperatures of a room in summer without mechanical cooling. General criteria and validation procedures

Available format(s)

Hardcopy , PDF

Superseded date

30-09-2017

Language(s)

English

Published date

31-01-2006

€348.24
Excluding VAT

Foreword
Introduction
1 Scope
2 Normative references
3 Terms, definitions, symbols and units
  3.1 Terms and definitions
  3.2 Symbols and units
  3.3 Subscripts
4 Determination of internal temperatures
  4.1 Assumptions
  4.2 Evaluation of the relevant temperatures
  4.3 Room thermal balance
  4.4 Boundary conditions
  4.5 Terms in the thermal balance equations
5 Procedure for carrying out calculations
  5.1 General
  5.2 Design climatic data
  5.3 Geometrical and thermophysical characteristics
      of room elements
  5.4 Design internal gains
  5.5 Design occupant behaviour
  5.6 Calculation procedure
6 Report of the calculation
7 Validation procedures
  7.1 Introduction
  7.2 Validation of heat transfer processes
  7.3 Validation procedure for the whole calculation method
Annex A (informative) Example of solution technique
      A.1 Introduction
      A.2 Basic assumptions for the calculation method
      A.3 Calculation procedure
      A.4 Room thermal balance
Annex B (informative) Convective heat transfer through
        ventilated air layer
      B.1 Introduction
      B.2 Convective heat transfer for a vertical air layer
      B.3 Convective heat transfer for an external horizontal
          air layer
Annex C (informative) Shading due to overhangs and side fins
      C.1 Introduction
      C.2 Calculation path for overhang
      C.3 Calculation path for vertical projection at the
          end of the overhang
      C.4 Calculation path for side fin
      C.5 Calculation of the sunlit area due to short side
          fin
      C.6 External obstruction
      C.7 Sunlit factor
Annex D (informative) Design climatic data in the warm season
Annex E (informative) Calculation of the internal long-wave
        radiation exchanges in buildings
      E.1 Introduction
      E.2 Limits of application
      E.3 Calculation procedure
Annex F (informative) External radiative long-wave heat
        transfer coefficients
      F.1 Introduction
      F.2 Terms and calculation procedure
Annex G (informative) Solar factors
      G.1 Introduction
      G.2 Solar to air factor
      G.3 Distribution factors
      G.4 Solar loss factor
Annex H (informative) Internal gains
      H.1 Introduction
      H.2 Residential building
      H.3 Non residential building
Annex J (informative) Air ventilation
      J.1 Introduction
      J.2 Calculation procedure
      J.3 Example of calculation of natural ventilation
          rates for simple building
Annex K (informative) Detailed results of the validation
        tests considered in the 'whole validation model'
        procedure
Bibliography

Specifies the assumptions, boundary conditions, equations and validation tests for a calculation procedure, under transient hourly conditions, of the internal temperatures (air and operative) during the warm period, of a single room without any cooling/heating equipment in operation.

Committee
B/540
DevelopmentNote
Supersedes 95/105441 DC. (02/2006) Supersedes 10/30202116 DC. (04/2012)
DocumentType
Standard
Pages
96
PublisherName
British Standards Institution
Status
Superseded
SupersededBy
Supersedes

EN 673:2011 Glass in building - Determination of thermal transmittance (U value) - Calculation method
ISO 9346:2007 Hygrothermal performance of buildings and building materials — Physical quantities for mass transfer — Vocabulary
EN 410:2011 Glass in building - Determination of luminous and solar characteristics of glazing
ISO 15099:2003 Thermal performance of windows, doors and shading devices — Detailed calculations
ISO 10077-2:2017 Thermal performance of windows, doors and shutters — Calculation of thermal transmittance — Part 2: Numerical method for frames
ISO 9288:1989 Thermal insulation — Heat transfer by radiation — Physical quantities and definitions
ISO 9050:2003 Glass in building — Determination of light transmittance, solar direct transmittance, total solar energy transmittance, ultraviolet transmittance and related glazing factors
ISO 13370:2017 Thermal performance of buildings — Heat transfer via the ground — Calculation methods
ISO 15927-2:2009 Hygrothermal performance of buildings Calculation and presentation of climatic data Part 2: Hourly data for design cooling load
ISO 6946:2017 Building components and building elements — Thermal resistance and thermal transmittance — Calculation methods
ISO 10077-1:2017 Thermal performance of windows, doors and shutters — Calculation of thermal transmittance — Part 1: General
ISO 9251:1987 Thermal insulation Heat transfer conditions and properties of materials Vocabulary
ISO 7345:1987 Thermal insulation Physical quantities and definitions
ISO 10292:1994 Glass in building — Calculation of steady-state U values (thermal transmittance) of multiple glazing

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