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open-ideas / IDEAS

Modelica library allowing simultaneous transient simulation of thermal and electrical systems at both building and feeder level.
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Improvement of longwave heat transfer calculation when using view factors #593

Closed Mathadon closed 4 years ago

Mathadon commented 7 years ago

We should implement radiative heat transfer using the concepts of radiosity and irradiation. This leads to more accurate models in the view factor implementation. Also, we can create dummy variables for T^4 such that a linear algebraic loop is formed although the equations are non-linear.

Mathadon commented 7 years ago

The new implementation leads to negligible changes in a test model and is more complex than anticipated because Dymola does not solve the formed linear matrix at translation. I'll leave the code on a development branch for now.