Please use this identifier to cite or link to this item:
http://hdl.handle.net/10397/44141
Title: | A novel control strategy for air-cooled twin-circuit screw chillers | Authors: | Yang, J Chan, KT Dai, T Zhang, H Zhou, Z |
Issue Date: | 2015 | Source: | Procedia engineering, 2015, v. 121, p. 699-705 | Abstract: | Air-cooled chillers are generally the major electricity consumers in air-conditioned buildings in the subtropical climate. To improve the energy efficiency of the air-cooled chillers at part load conditions, two or more refrigeration circuits are designed. This paper considers how the use of optimal circuit loading sequence (CLS) enables these chillers to operate more efficiently. A thermodynamic model for the air-cooled chillers with twin refrigeration circuits was developed using TRNSYS and validated using a wide range of operating data. Based on the sophisticated chiller model, an analysis was carried out on how the chiller COP varied with different CLS and variable condensing temperature control (CTC). A chiller plant designed for a representative office building in Hong Kong was investigated to assess the potential electricity savings by use of CLS. 4.2% of the annual electricity consumption by chillers could be achieved with optimal CLS compared with the base case. Under CTC, the coefficient of performance (COP) was improved further, and CTC coupling with optimal CLS would reduce the annual total electricity consumption for cooling by 9.6%. | Keywords: | Air-cooled chiller Circuit loading sequence Condensing temperature control Twin refrigeration circuits |
Publisher: | Elsevier | Journal: | Procedia engineering | ISSN: | 1877-7058 | DOI: | 10.1016/j.proeng.2015.09.010 | Description: | 9th International Symposium on Heating, Ventilation and Air Conditioning, ISHVAC 2015 Joint with the 3rd International Conference on Building Energy and Environment, COBEE 2015, 12-15 July 2015 | Rights: | © 2015 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). The following publication Yang, J., Chan, K. T., Dai, T., Zhang, H., & Zhou, Z. (2015). A novel control strategy for air-cooled twin-circuit screw chillers. Procedia engineering, 121, 699-705 is available at https://doi.org/10.1016/j.proeng.2015.09.010 |
Appears in Collections: | Journal/Magazine Article |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
Yang_novel_control_strategy.pdf | 330.75 kB | Adobe PDF | View/Open |
Page views
124
Last Week
1
1
Last month
Citations as of Apr 14, 2024
Downloads
90
Citations as of Apr 14, 2024
SCOPUSTM
Citations
2
Last Week
0
0
Last month
Citations as of Apr 19, 2024
WEB OF SCIENCETM
Citations
2
Last Week
0
0
Last month
Citations as of Apr 18, 2024
Google ScholarTM
Check
Altmetric
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.