Do we need a loss coefficient for pressure controllers?

[dlohmeier]

I just came to realize that "loss_coefficient" is one of the pressure controller's input entries. However, I fail to see a need for this parameter. This parameter is usually used to induce an additional pressure loss between the components' inlet and outlet node. Yet, the pressure loss for the pressure controller is fully defined by the control behavior, which renders this parameter useless. I actually tested it for the Schutterwald network: when adding a pressure controller, there is no difference in the junctions' pressure results when changing this parameter.

[dlohmeier]

Btw. the result is also not influenced by this parameter, if the controlled_junction is not the to_junction.