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.