.BuildSysPro.BuildingStock.Utilities.Records.HeatTransfer.h_surf_ISO6946

Information

Record used to store the surface heat transfer coefficients from ISO 6946

Hypothesis and equations

These coefficients can be used to calculate the total heat transfer occuring between a wall surface and the ambiant air, including both the convective and radiative effects.

The coefficient values are those specified in the ISO 6946 standard, which are also used in many national building energy regulations, including the French "Réglementation Thermique".

Bibliography

• International Standard ISO 6946:2017 : Building components and building elements — Thermal resistance and thermal transmittance — Calculation methods
• Réglementation Thermique 2012

Instructions for use

Each coefficient is suited for a specific orientation, and for the indoor or outdoor surface of the wall, for instance respectively hs_int and hs_ext for the Wall model of BuildSysPro.

Known limits / Use precautions

These coefficients shall be used only if the radiative heat transfer is included in the surface heat transfer model. For instance, for the models like the Wall model or the Window model of BuildSysPro, these coefficients shall be used only if GLOext=false.

The coefficients are average values, suited to represent an average surface heat transfer, but they do not take into account the fact that the air displacement (wind speed), surface radiative properties and meteorological conditions (cloudiness) have an impact on the total surface heat transfer.

Validations

Validated model - Mathias BOUQUEREL 05/2017

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Licensed by EDF under a 3-clause BSD-license
Copyright © EDF 2009 - 2019
BuildSysPro version 3.6.0
Author : Mathias BOUQUEREL, EDF (2017)
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