modelIndirect

Information

Indirect cooling energy transfer station (ETS) model that controls the building chilled water supply temperature by modulating a primary control valve on the district supply side. The design is based on a typical district cooling ETS described in ASHRAE's District Cooling Guide. As shown in the figure below, the building pumping design (constant/variable) is specified on the building side and not within the ETS.

Reference

American Society of Heating, Refrigeration and Air-Conditioning Engineers. (2019). Chapter 5: End User Interface. In District Cooling Guide, Second Edition and Owner's Guide for Buildings Served by District Cooling.

Revisions

• March 27, 2024, by David Blum:
  Update icon and fix port orientation to align with convention.
  This is for issue #3606.
• May 30, 2023, by David Blum:
  Change to extend from Buildings.DHC.ETS.BaseClasses.PartialDirect.
• March 16, 2023, by David Blum:
  Fixed building supply temperature controller parameter reverseActing by changing from true to false.
  This is for issue 3299.
• January 11, 2023, by Michael Wetter:
  Changed controls to use CDL. Changed PID to PI as default for controller.
• March 21, 2022, by Chengnan Shi:
  Update with base class partial model.
• Novermber 13, 2019, by Kathryn Hinkelman:
  First implementation.