modelEnable

Validation sequence of enabling and disabling tower fans
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Information

This example validates Buildings.Controls.OBC.ASHRAE.G36.Plants.Chillers.Towers.FanSpeed.ReturnWaterTemperature.Subsequences.Enable. It shows the sequences for enabling and disabling the tower fans under different conditions.

  1. The instance enaTow shows that the tower fans will be enabled when:
    • The enabled chiller's head pressure control maximum tower fan speed is greater than the tower minimum speed fanSpeMin, and
    • The tower temperature TTow rises above setpoint TTowSet by 1 °F, and
    • The tower fan has been OFF for at least 1 minute.
  2. The instance disTow shows that all the tower fans should be disabled when the enabled chiller's head pressure control maximum tower fan speed uMaxTowSpeSet has equaled tower minimum speed fanSpeMin for 5 minutes.
  3. The instance disTow1 shows that all the tower fans should be disabled when the tower fan speed uFanSpe has been at the minimum speed for 5 minutes and the tower temperature TTow drops below the setpoint minus 1 °F.

Components

TypeNameDefaultDescription
Buildings.Controls.OBC.ASHRAE.G36.Plants.Chillers.Towers.FanSpeed.ReturnWaterTemperature.Subsequences.EnableenaTowEnabling tower fans
Buildings.Controls.OBC.ASHRAE.G36.Plants.Chillers.Towers.FanSpeed.ReturnWaterTemperature.Subsequences.EnabledisTowDisable tower fans due to the low head pressure control maximum tower fan speed
Buildings.Controls.OBC.ASHRAE.G36.Plants.Chillers.Towers.FanSpeed.ReturnWaterTemperature.Subsequences.EnabledisTow1Disable tower fans due to low fan speed and low tower temperature

Revisions

  • August 12, 2019, by Jianjun Hu:
    First implementation.