.Buildings.DHC.Networks.Controls.AgentPump1Pipe

Information

Controller for balacing agents (i.e. reservoirs and plants) pump.

This controller decides to turn on or off the agent pump depending on the current net demand of the district if TRetDis > TSupDis cooling else heating and the temperature differential between the agent source temperature TSou and the agent inlet temperature TSouIn adjusted by the offset dToff. In particular the pump turns on : if heating and TSou - TSouIn - dToff > 0 or if cooling and TSouIn - Tsou - dToff > 0. Then if the pump is turned on a PID controller, by default used as P, controls the pump control input by using TSouOut as measurement and as setpoint TSou - dToff for heating or TSou + dToff for cooling. dToff can be considered the nominal value of the agent heat exchanger pinch point temperature difference.

References

Ettore Zanetti, David Blum, Michael Wetter Control development and sizing analysis for a 5th generation district heating and cooling network using Modelica, 2023 International Modelica conference proceedings.

Revisions

• January 20, 2023, by Ettore Zanetti:
  First implementation.