modelWithoutWSE

Information

This example validates Buildings.Controls.OBC.ASHRAE.G36.Plants.Chillers.Towers.Controller. It demonstrates the cooling tower control of a less coupled chiller plant that has two chillers without waterside economizer.

• At beginning, the water level is lower than the minimum thus the tower starts adding water (yMakUp). When the water level becomes greater than the maximum, it stops adding water at 1500 seconds.
• The plant is enabled in chiller mode at 360 seconds. The chiller 1 becomes enabled and the lead cooling tower cell becomes enabled at 372 seconds.
• After 300 seconds (chaTowCelIsoTim) at 660 seconds, it turns on the leading cell.
• The tower fan speed is controlled based on the control of condenser water return temperature ( Buildings.Controls.OBC.ASHRAE.G36.Plants.Chillers.Towers.FanSpeed.ReturnWaterTemperature.Controller).
• At 1560 seconds, the plant state setpoint changes from 1 to 2. According to the vector towCelOnSet, which specifies number of cells at each plant stage (staVec), two tower cell should be enabled. After 300 seconds (chaTowCelIsoTim) at 1860 seconds, it turns on the cell two.

Components

Revisions

• September 16, 2019, by Jianjun Hu:
  First implementation.