d
, the gap height h
,
the surface temperatures T1
and T2
and the gases air, argon, krypton, xenon and SF6.
Empirical alpha equation by Mac Gregor/Emery (7th edition of VDI-Waermeatlas Fc3 formula 15)
function alphaGap input Modelica.Units.SI.Temperature T1 "Surface temperature 1"; input Modelica.Units.SI.Temperature T2 "Surface temperature 2"; input Modelica.Units.SI.Length d "Gap distance"; input Modelica.Units.SI.Length h "Gap height"; input Integer gas "Gas within the gap: 1:air, 2:argon or 3:krypton, 4:xenon, 5:SF6"; output Modelica.Units.SI.CoefficientOfHeatTransfer value; end alphaGap;