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inner IR emissivity calculation #639

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@PGorzalka

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@PGorzalka

Hi guys,

I stumbled across weird IR emissivity values, so I thought I'd take the opportunity to create my first GitHub issue. As I usually don't work with GitHub, I don't really now the usual workflow. Hope this is the right thing to do :)

What is the problem?

  • Inner IR emissivity values become very high (>> 1)
  • equations in TEASER/teaser/logic/buildingobjects/calculation seem to be wrong. Examples (there are other similar lines):
    • three_element line 791-797

      self.ir_emissivity_inner_iw = ( sum(in_wall.layer[0].material.ir_emissivity * in_wall.area for in_wall in self.thermal_zone.inner_walls) + sum(floor.layer[0].material.ir_emissivity * floor.area for floor in self.thermal_zone.floors) + sum(ceiling.layer[0].material.ir_emissivity * ceiling.area for ceiling in self.thermal_zone.ceilings) / self.area_iw)

      should be

      self.ir_emissivity_inner_iw = (( sum(in_wall.layer[0].material.ir_emissivity * in_wall.area for in_wall in self.thermal_zone.inner_walls) + sum(floor.layer[0].material.ir_emissivity * floor.area for floor in self.thermal_zone.floors) + sum(ceiling.layer[0].material.ir_emissivity * ceiling.area for ceiling in self.thermal_zone.ceilings) / self.area_iw

    • four_element line 759-761

      self.ir_emissivity_inner_ow = ( (sum(out_wall.layer[0].material.ir_emissivity * out_wall.area for out_wall in self.thermal_zone.outer_walls)))

      should be

      self.ir_emissivity_inner_ow = ( (sum(out_wall.layer[0].material.ir_emissivity * out_wall.area for out_wall in self.thermal_zone.outer_walls)) / self.area_ow)

Why do we want to solve it?

  • I think the values are not needed for export, but wrong equations should be corrected anyway. Sorry if I got something wrong and these are intentional values ;)

How do we want to solve it?

  • Have a look at all IR emissivity equations in the calculation folder and correct them if necessary

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