Chiller system and a method for generating coordination maps for energy efficient chilled water and condenser water temperature resets in chiller plant system
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Solution Overview
Problem
Current water chiller systems face challenges in efficiently managing chilled and condenser water temperature setpoints, leading to energy consumption inefficiencies and delays in reaching desired zone temperatures, requiring complex algorithms and significant tuning efforts.
Innovation Solution
A system and method for generating coordination maps that adjust chilled and condenser water temperature setpoints based on measured parameters, load, and ambient conditions, using a controller and processor to configure optimal operating setpoints, reducing the need for complex calculations and tuning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If complex trim and response algorithms are used to adjust setpoints, then energy consumption is reduced, but device complexity and tuning effort increase
Solution Approach 1:
The patent replaces complex, difficult-to-tune algorithms with simple, pre-defined coordination maps that are easy to implement and require minimal tuning. These maps act as simplified substitutes that provide sufficient energy efficiency without the complexity of advanced algorithms
Solution Approach 2:
The patent transforms the control approach by changing from dynamic algorithmic calculations to static coordination maps with pre-determined setpoint relationships. This parameter transformation simplifies the control system while maintaining energy efficiency through coordinated temperature adjustments
2Loss of energy
If complex control algorithms are implemented, then setpoint optimization improves, but ease of operation deteriorates due to significant tuning efforts
Solution Approach 1:
The coordination maps are designed to be self-configuring based on readily available sensor data (wet bulb temperature, load). The system automatically determines appropriate setpoints without requiring operator tuning or complex configuration, making it easy to operate while maintaining energy efficiency
3Device complexity
If traditional independent control of chilled and condenser water temperatures is used, then device complexity is low, but energy efficiency deteriorates
Solution Approach 1:
The patent merges the independent control of chilled water temperature and condenser water temperature into a coordinated control system. The coordination maps establish relationships between these parameters, ensuring they are adjusted together to optimize energy efficiency while maintaining simple implementation
Data Source
AI summary
Techniques for generating coordination maps for energy efficient chilled water and condenser water temperature resets in a chiller plant system. A controller is configured to control and set thresholds for one or more parameters of the chiller system, the chiller system includes one or more cooling tower, one or more pumps, and one or more water chillers, and one or more sensors operably coupled to the controller, the one or more sensors are configured to measure values for one or more parameters. A processor is coupled to the controller, the processor is configured to generate a coordination map based on the measured values and the thresholds for the one or more parameters, configure an operating setpoint for the chiller system based on the coordination map, and control the chiller system based at least in part on the configured operating setpoint.