DYNAMIC MODELING AND GAIN SCHEDULING CONTROL OF A CHIILLED WATER COOLING SYSTEM

摘要

A dynamic model of a Chilled Water (ChW) cooling system with a stratified ChW tank was developed. A Pi-based Gain Scheduling (GS) control strategy was designed to improve thermal performance of the chiller system. Five different operation strategies were simulated and the energy consumption and cost of operating the system under full load and partial load conditions were compared. The results showed that the operating strategy with optimized chilled water set point saved 7.16% energy (21.5% cost) compared to the case with constant set point under full load conditions. These savings were more significant (8.5% energy and 36% cost) under partial load conditions.