.AixLib.Fluid.FixedResistances.SimplePipe

Information

This model represents a pipe using a simple approach and consists of a HydraulicDiameter and n volume elements to approximate the thermal wave propagation. The heat transfer through the pipe wall is modeled with a CylindricHeatTransfer and can be deactivated. This model can be used if a heat flow or heat transfer to the pipe has to be modeled and the thermal mass of the fluid cannot be neglected. Since the pipe is discretized in n elements, this model should only be used, if the dead time of the thermal wive propagation can be neglected. With an increasing number of elements (nNodes) the wave propagation becomes more realistic. However, the simulation time will increase as well.

For long pipes, the model PlugFlowPipe can be used (the heat transfer in the PlugFlowPipe can cause problems for small volume flows ).

Revisions

• Mai 07, 2020, by Alexander Kümpel:
  First implementation