Condenser water supply temperature control is poor

Objective/Method/Outcome

Objective: Determines if condenser water supply temperature control is in error

Method: Compares the water supply temperature to the water supply temperature setpoint. If the difference exceeds the threshold, for more than the acceptable time, the cost per hour of the error is calculated.

Outcome: Generates an insight and calculates the potential savings.

Applicable System

CCWS

Description

Determine the error severity of a condenser water temperature control system in degree*hours.

This rule is part of the CopperTree Standard rule-set.

Calculate the severity metric based on the absolute difference between the water temperature and the water temperature setpoint deadband while the water temperature is outside of the deadband during scheduled hours.

Message

The condenser water supply temperature has deviated from the setpoint for more than 10 degree*hours per week while the system is enabled. Review controller tuning parameters.

Rule Template

Insight Type: Integrity KPI

Trigger Type: Active High

Default Priority

Medium

Logic

Inputs

Input	Unit	Tags	Description
Condenser Water Supply Temperature	°C/ °F	Chiller Condenser Water Supply Temperature	The recorded water temperature
Condenser Water Supply Temperature Setpoint	°C/ °F	Chiller Condenser Water Supply Temperature Setpoint	The water temperature setpoint
Status		Chilled Water System Enabled, Chiller Status	To detect if CCWS is operational
Const. – Temperature Threshold	°C/ °F		To minimum temperature deviation from setpoint beyond which an insight would be generated
Const. – Acceptable Weekly Threshold	°*hr
Days of operation annually			Days per year the system is operational
Cost per Degree*Hour	$

Notes

CTL generated:

CWST Severity KPI