Dynamic modeling and self-optimizing operation of chilled water systems using extremum seeking control

被引：50
作者：
Li, Xiao [1 ]
Li, Yaoyu [2 ]
Seem, John E. [3 ]
Li, Pengfei [4 ]
机构：
[1] Univ Wisconsin, Dept Mech Engn, Milwaukee, WI 53201 USA
[2] Univ Texas Dallas, Dept Mech Engn, Richardson, TX 75083 USA
[3] Johnson Control Inc, Bldg Efficiency Res Grp, Milwaukee, WI USA
[4] United Technol Res Ctr, E Hartford, CT 06108 USA
来源：
ENERGY AND BUILDINGS | 2013年 / 58卷
关键词：
Building ventilating and air conditioning system; Chilled-water system; Extremum seeking; Energy efficiency; Mechanical draft counter-flow wet cooling tower; ENERGY MANAGEMENT; PERFORMANCE; ANTIWINDUP; SIMULATION; OPTIMIZATION;
D O I：
10.1016/j.enbuild.2012.12.010
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
Energy efficient operation of chilled-water systems is important for the energy saving of commercial buildings. This paper presents an extremum seeking control (ESC) scheme for energy efficient operation of chilled-water system, and presents a Modelica based dynamic simulation model for demonstrating the effectiveness of the proposed control strategy. The simulated plant consists of a water-cooled screw chiller and a mechanical-draft counter-flow wet cooling tower. The ESC scheme takes the total power consumption of chiller compressor and tower fan as feedback, and uses the fan speed setting as control input. The inner-loop controllers for the chiller operation include two proportional-integral (PI) control loops for regulating the evaporator superheat and the chilled water temperature. Simulation was conducted for three scenarios: fixed condition, change in evaporator inlet water temperature, and change in ambient air condition. The simulation results demonstrated the effectiveness of the proposed ESC strategy, and the potential for energy saving is also evaluated. Also investigated is the ESC windup issue caused by the limitation of the fan's maximum operation speed. A back-calculation anti-windup ESC scheme is applied and its effectiveness is validated by simulation results. (C) 2012 Elsevier B.V. All rights reserved.
引用
收藏
页码：172 / 182
页数：11
相关论文
共 48 条
  • [1] [Anonymous], 2012, DYMOLA MULTIENGINEER
  • [2] Ariyur K. B., 2003, REAL TIME OPTIMIZATI
  • [3] ASHRAE, 2008, ASHARE HANDBOOK HVAC
  • [4] Astrom K.J., 1995, INSTRUMENT SOC AM
  • [5] Bernier M.A., 1994, ASHRAE T, V100, P114
  • [6] BERNIER MA, 1995, ASHRAE J, V37, P56
  • [7] AN ANALYSIS PACKAGE COMPARING PID ANTIWINDUP STRATEGIES
    BOHN, C
    ATHERTON, DP
    [J]. IEEE CONTROL SYSTEMS MAGAZINE, 1995, 15 (02): : 34 - 40
  • [8] Bosnjakovic F., 1965, Technische Thermodinamik
  • [9] Bourillot C., 1983, REPORT CS 3212 SR
  • [10] Braun J.E., 1989, ASHRAE Transactions, V95, P164
12345