.Buildings.Examples.ChillerPlant.BaseClasses.Controls.WSEControl

Information

This component decides if the WSE is set to on or off. The WSE is enabled when

1. The WSE has been disabled for at least 20 minutes, and
2. T_{WSE_CHWST} > 0.9 T_WetBul + T_TowApp + T_WSEApp

The WSE is disabled when

1. The WSE has been enabled for at least 20 minutes, and
2. T_{WSE_CHWRT} < 1 + T_{WSE_CWST}

where T_{WSE_CHWST} is the chilled water supply temperature for the WSE, T_WetBul is the wet bulb temperature, T_TowApp is the cooling tower approach, T_WSEApp is the approach for the WSE, T_{WSE_CHWRT} is the chilled water return temperature for the WSE, and T_{WSE_CWST} is the condenser water return temperature for the WSE.

Revisions

• April 6, 2016, by Michael Wetter:
  Replaced Modelica_StateGraph2 with Modelica.StateGraph. This is for issue 504.
• April 1, 2013, by Wangda Zuo:
  Added final attribute to initial state declaration. This is required for a successful model check in Dymola 2014 using the pedantic check.
• September 12, 2011, by Wangda Zuo:
  Deleted the first order continuous block and changed the model to use SI units.
• July 20, 2011, by Wangda Zuo:
  Added comments, redefined variables names, and merged to library.
• January 18, 2011, by Wangda Zuo:
  First implementation.