InteriorWall represents heat storage within walls.
It links a variable number n of thermal resistances
and capacities to a series connection. n thus defines
the spatial discretization of thermal effects within the wall. All
effects are considered as one-dimensional normal to the wall's
surface. This model is thought for interior wall elements that only
serve as heat storage elements. The RC-chain is defined via a
vector of capacities CInt[n] and a vector of
resistances RInt[n]. Resistances and capacities are
connected alternately, starting with the first resistance
RInt[1], from heat port_a into the
wall.
