modelResetMinBypass

Information

This example validates Buildings.Controls.OBC.ASHRAE.G36.Plants.Chillers.Staging.Processes.Subsequences.ResetMinBypass.

The instance minBypRes shows the process of changing the bypass valve when the minimum bypass chilled water flow setpoint has been changed, when the plant is in a staging up process.

• Before 90 seconds, the plant is not in the staging process. There is no change to the minimum bypass valve (yMinBypRes=true).
• At 90 seconds, the plant starts staging process. However, it is not yet to change the bypass valve (yMinBypRes=true). As the upstream subprocess has not finished (uUpsDevSta=false).
• At 120 seconds, the plant is still in the staging process and the upstream subprocess has finished (uUpsDevSta=true). It starts changing the minimum flow setpoint (uSetChaPro=true) and changing the bypass valve (yMinBypRes=false). The measured chiller water flow becomes different from its setpoint.
• At 300 seconds, it finished the setpoint changing process and the uSetChaPro becomes false. The chilled water flow has been greater than the setpoint.
• After 60 seconds to 360 seconds, the minimum bypass valve position changing process is finished (yMinBypRes=true).

Components

Revisions

• September 26, 2019, by Jianjun Hu:
  First implementation.