Alternative pipe model

Created by: alexanderAKU

What is the problem?

Currently, the aixlib contains the pip 'PlugFlowPipe', which has problems with heat transfer and the model 'Pipe', which bases on the MSL pipe model.

How do we want to solve it? Describe the solution you'd like

• We want to create a simple discretized pipe model that includes n volumes and the 'HydraulicDiameter' as well as a radial heat transfer.
• Integrate the PlugFlowPipe and the new SimplePipe into a GenericPipe model with records for pipe size and insulation.