Tactics to optimize the energy efficiency of a chiller system with multiple air-cooled chillers

Kwoktai Chan; Fuwing Yu

Tactics to optimize the energy efficiency of a chiller system with multiple air-cooled chillers

Kwoktai Chan
, Fuwing Yu

Division of Science, Engineering and Health Studies (SEHS)

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

2 Citations (Scopus)

Abstract

Multiple air-cooled chillers tend to be staged improperly at varying cooling requirements in buildings, causing their efficiency to fluctuate and decrease. To operate chillers efficiently, chiller staging is a tactic which involves identifying the optimum switch-over points of chillers and pumps at different cooling loads and ambient conditions. By analyzing the operating data of a multiple-chiller plant, it was found that the average plant efficiency could be improved to 1.15 kW/ton compared with the existing average value of 1.40 kW/ton, and the total chiller and pump power could be saved by 17.6% annually. Another tactic of enhancing the efficiency of air-cooled chillers is to lower the condensing temperature during below-design ambient conditions. Simulation and experiments are required to explore the controllability of condensing temperature, and to identify the boundary and dynamic response of parameters.

Original language	English
Title of host publication	Energy and the Environment - Proceedings of the International Conference on Energy and the Environment
Editors	K. Chen, T.W. Tong, G. Sarlos
Pages	1419-1424
Number of pages	6
Publication status	Published - 2003
Event	Energy and the Environment - Proceedings of the International Conference on Energy and the Environment - Shanghai, China Duration: 1 Dec 2003 → 1 Dec 2003

Publication series

Name	Energy and the Environment - Proceedings of the International Conference on Energy and the Environment
Volume	2

Conference

Conference	Energy and the Environment - Proceedings of the International Conference on Energy and the Environment
Country/Territory	China
City	Shanghai
Period	1/12/03 → 1/12/03

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

Keywords

Air-cooled
Condensing temperature
Multiple-chiller staging
Part load efficiency

Cite this

Chan, K., & Yu, F. (2003). Tactics to optimize the energy efficiency of a chiller system with multiple air-cooled chillers. In K. Chen, T. W. Tong, & G. Sarlos (Eds.), Energy and the Environment - Proceedings of the International Conference on Energy and the Environment (pp. 1419-1424). (Energy and the Environment - Proceedings of the International Conference on Energy and the Environment; Vol. 2).

Chan, Kwoktai ; Yu, Fuwing. / Tactics to optimize the energy efficiency of a chiller system with multiple air-cooled chillers. Energy and the Environment - Proceedings of the International Conference on Energy and the Environment. editor / K. Chen ; T.W. Tong ; G. Sarlos. 2003. pp. 1419-1424 (Energy and the Environment - Proceedings of the International Conference on Energy and the Environment).

@inproceedings{ce16b1683b3347948850d84c90c994b7,

title = "Tactics to optimize the energy efficiency of a chiller system with multiple air-cooled chillers",

abstract = "Multiple air-cooled chillers tend to be staged improperly at varying cooling requirements in buildings, causing their efficiency to fluctuate and decrease. To operate chillers efficiently, chiller staging is a tactic which involves identifying the optimum switch-over points of chillers and pumps at different cooling loads and ambient conditions. By analyzing the operating data of a multiple-chiller plant, it was found that the average plant efficiency could be improved to 1.15 kW/ton compared with the existing average value of 1.40 kW/ton, and the total chiller and pump power could be saved by 17.6\% annually. Another tactic of enhancing the efficiency of air-cooled chillers is to lower the condensing temperature during below-design ambient conditions. Simulation and experiments are required to explore the controllability of condensing temperature, and to identify the boundary and dynamic response of parameters.",

keywords = "Air-cooled, Condensing temperature, Multiple-chiller staging, Part load efficiency",

author = "Kwoktai Chan and Fuwing Yu",

year = "2003",

language = "English",

isbn = "7532373355",

series = "Energy and the Environment - Proceedings of the International Conference on Energy and the Environment",

pages = "1419--1424",

editor = "K. Chen and T.W. Tong and G. Sarlos",

booktitle = "Energy and the Environment - Proceedings of the International Conference on Energy and the Environment",

note = "Energy and the Environment - Proceedings of the International Conference on Energy and the Environment ; Conference date: 01-12-2003 Through 01-12-2003",

}

Chan, K & Yu, F 2003, Tactics to optimize the energy efficiency of a chiller system with multiple air-cooled chillers. in K Chen, TW Tong & G Sarlos (eds), Energy and the Environment - Proceedings of the International Conference on Energy and the Environment. Energy and the Environment - Proceedings of the International Conference on Energy and the Environment, vol. 2, pp. 1419-1424, Energy and the Environment - Proceedings of the International Conference on Energy and the Environment, Shanghai, China, 1/12/03.

Tactics to optimize the energy efficiency of a chiller system with multiple air-cooled chillers. / Chan, Kwoktai; Yu, Fuwing.
Energy and the Environment - Proceedings of the International Conference on Energy and the Environment. ed. / K. Chen; T.W. Tong; G. Sarlos. 2003. p. 1419-1424 (Energy and the Environment - Proceedings of the International Conference on Energy and the Environment; Vol. 2).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

TY - GEN

T1 - Tactics to optimize the energy efficiency of a chiller system with multiple air-cooled chillers

AU - Chan, Kwoktai

AU - Yu, Fuwing

PY - 2003

Y1 - 2003

N2 - Multiple air-cooled chillers tend to be staged improperly at varying cooling requirements in buildings, causing their efficiency to fluctuate and decrease. To operate chillers efficiently, chiller staging is a tactic which involves identifying the optimum switch-over points of chillers and pumps at different cooling loads and ambient conditions. By analyzing the operating data of a multiple-chiller plant, it was found that the average plant efficiency could be improved to 1.15 kW/ton compared with the existing average value of 1.40 kW/ton, and the total chiller and pump power could be saved by 17.6% annually. Another tactic of enhancing the efficiency of air-cooled chillers is to lower the condensing temperature during below-design ambient conditions. Simulation and experiments are required to explore the controllability of condensing temperature, and to identify the boundary and dynamic response of parameters.

AB - Multiple air-cooled chillers tend to be staged improperly at varying cooling requirements in buildings, causing their efficiency to fluctuate and decrease. To operate chillers efficiently, chiller staging is a tactic which involves identifying the optimum switch-over points of chillers and pumps at different cooling loads and ambient conditions. By analyzing the operating data of a multiple-chiller plant, it was found that the average plant efficiency could be improved to 1.15 kW/ton compared with the existing average value of 1.40 kW/ton, and the total chiller and pump power could be saved by 17.6% annually. Another tactic of enhancing the efficiency of air-cooled chillers is to lower the condensing temperature during below-design ambient conditions. Simulation and experiments are required to explore the controllability of condensing temperature, and to identify the boundary and dynamic response of parameters.

KW - Air-cooled

KW - Condensing temperature

KW - Multiple-chiller staging

KW - Part load efficiency

UR - https://www.scopus.com/pages/publications/2642572036

M3 - Conference contribution

AN - SCOPUS:2642572036

SN - 7532373355

T3 - Energy and the Environment - Proceedings of the International Conference on Energy and the Environment

SP - 1419

EP - 1424

BT - Energy and the Environment - Proceedings of the International Conference on Energy and the Environment

A2 - Chen, K.

A2 - Tong, T.W.

A2 - Sarlos, G.

T2 - Energy and the Environment - Proceedings of the International Conference on Energy and the Environment

Y2 - 1 December 2003 through 1 December 2003

ER -

Chan K, Yu F. Tactics to optimize the energy efficiency of a chiller system with multiple air-cooled chillers. In Chen K, Tong TW, Sarlos G, editors, Energy and the Environment - Proceedings of the International Conference on Energy and the Environment. 2003. p. 1419-1424. (Energy and the Environment - Proceedings of the International Conference on Energy and the Environment).

Tactics to optimize the energy efficiency of a chiller system with multiple air-cooled chillers

Abstract

Publication series

Conference

UN SDGs

Keywords

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