.Buildings.DHC.ETS.Combined.Subsystems.HeatExchanger

Information

This is a model for a district heat exchanger system with a variable speed pump on the secondary side, and a variable speed pump (in case of a passive network) or a two-way modulating valve (in case of an active network) on the primary side.

The system is controlled based on the logic described in Buildings.Obsolete.DHC.ETS.Combined.Controls.HeatExchanger. The pump flow rate is considered proportional to the pump speed under the assumption of a constant flow resistance in both the primary and the secondary loops.

Revisions

• November 14, 2025, by Michael Wetter:
  Refactored implementation.
  This is for #4354.
• March 27, 2024, by David Blum:
  Update icon.
  This is for issue #3606.
• July 14, 2021, by Antoine Gautier:
  Refactored after updating the control logic, changed the primary control valve to pressure-independent.
  This is for issue #2561.
• July 31, 2020, by Antoine Gautier:
  First implementation.