modelEnable

Validation sequence for enabling and disabling chiller plant

Information

This example validates Buildings.Controls.OBC.ASHRAE.G36.Plants.Chillers.Generic.PlantEnable.Enable. It shows different conditions to enable and disable the plant.

  • For instance disPlaReq, the input chiPlaReq becomes greater than the ignorable request ignReq at 32400 seconds and becomes less than the ignorable request at 33000 seconds. The plant is enabled at 32400 seconds, but becomes disabled at 33300 seconds. It allows the plant being enabled for 15 minutes and then becomes disabled.
  • For instance disPlaOutTem, the input TOut becomes greater than the lockout temperature TChiLocOut at 4382 seconds. The plant becomes enabled. At 39877.7 seconds, the input TOut becomes lower than the lockout temperature TChiLocOut by 0.556 °C. The plant becomes disabled.
  • For instance disPlaSch, the chiller enabling schedule specifies that the plant should be enabled at 600 seconds. However, the plant becomes enabled at 900 seconds as it allows the plant being disabled for 15 minutes. The plant becomes disabled at 68400 seconds, which is specified in the plant scheduling.

Parameters

TypeNameDefaultDescription
RealaveTWetBul288.15Chilled water supply set temperature

Components

TypeNameDefaultDescription
Buildings.Controls.OBC.ASHRAE.G36.Plants.Chillers.Generic.PlantEnable.EnabledisPlaSchDisable plant without waterside economizer, due to schedule
Buildings.Controls.OBC.ASHRAE.G36.Plants.Chillers.Generic.PlantEnable.EnabledisPlaReqDisable plant without waterside economizer, due to lack of request
Buildings.Controls.OBC.ASHRAE.G36.Plants.Chillers.Generic.PlantEnable.EnabledisPlaOutTemDisable plant without waterside economizer, due to low outdoor temperature

Revisions

  • March 12, 2020, by Milica Grahovac:
    Removed tests related to initial stage determination. This is for issue 1831. Updated tests to include schedule based reference results.
  • March 20, 2019, by Jianjun Hu:
    First implementation.