.BuildSysPro.Building.BuildingEnvelope.Functions.U_Wall

Information

Function for the calculation of a wall U_value

Hypothesis and equations

This function calculates the U-value of a wall from the record containing the wall composition and the surface heat transfer coefficients.

Instructions for use

The inputs of the model are:

• The wall composition constructed according to the GenericWall record of BuildSysPro
• The surface heat transfer coefficients to be used on the interior and exterior surfaces

The output of the function is the wall U-value.

Known limits / Use precautions

None

Validations

Validated model - Mathias BOUQUEREL 07/2019

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

function U_Wall
  import Modelica.Units.SI;
  input BuildSysPro.Utilities.Records.GenericWall wall_record "Wall composition record";
  input SI.SurfaceCoefficientOfHeatTransfer hs_int = 7.69 "Internal surface coefficient of heat transfer";
  input SI.SurfaceCoefficientOfHeatTransfer hs_ext = 25 "External surface coefficient of heat transfer";
  output SI.SurfaceCoefficientOfHeatTransfer U_value "U_value of the wall";
end U_Wall;