AixLib.ThermalZones.ReducedOrder.RC.FiveElements

# .AixLib.ThermalZones.ReducedOrder.RC.FiveElements

Thermal Zone with five elements for exterior walls, interior walls, floor plate, roof, and interzonal elements"

## Information

This model adds another element for interzonal elements modelling heat transfer to adjacent zones. These elements are not represented in the reduced-order models with less components. For each interzonal element, one extra element is produced, which makes this model, in fact, be able to have a much higher number of elements (4 for the other elements plus the number of zone borders `nIze`), but the elements bordering zones with a lower index in `othZoneInd[nIze]` than this zone's index `zoneInd` are ignored here and calculated in the other zone's ROM. Ths implementation increases calculation times and calculation complexity - also because the interzonal elements are directly connected via heat flow ports to ensure no energy is produced out of or lost to nowhere. The interzonal elements are parameterized via the length of the RC-chain `nIzeRC`, the vector of capacities `CIze[nIze, nIzeRC]`, the vector of resistances `RIze[nIze, nIzeRC]` and the remaining resistances `RIzeRem[nIze]`.

The image below shows the RC-network of this model. In the image, dashed lines represent the possibly multiple interzonal elements (= array of borders). Dotted lines represent the radiation resistances between each pair of surfaces facing the indoor, which are not explicitly shown here due to the high amount of resistances. See the documentation of `FourElement` for a better visualisation.

## Revisions

- April 20, 2023, by Philip Groesdonk:
  First Implementation. This is for AixLib issue #1080.

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