Number of pipes: from Integer to Real

Such components (Dynamic[One|Two]PhaseFlowPipe...) can be used to model non-rounded cross-flow sections (rectangular, anular...). In such a case the "pipe" cyclindrical geometry is just an approximation. Once the pipe Dh is defined, a non-integer number of pipes may be necessary to meet the right cross-flow area and the wet perimeter.

added enhancement label

changed milestone to %ThermoSysPro v4.1

added model label

added Modeli label

marked this issue as related to #66

assigned to @guilherme.vescovi

We choose to use reals for ntubes (because of calibration issues and homogeneity with other components)

added quick win label

changed milestone to %ThermoSysPro v4.2