NDLI: Optimum control strategy for all-variable speed chiller plant

Content Provider	Springer Nature Link
Author	Jiang, Xiao qiang Long, Wei ding Li, Min
Copyright Year	2011
Abstract	The optimum control strategy and the saving potential of all variable chiller plant under the conditions of changing building cooling load and cooling water supply temperature were investigated. Based on a simulation model of water source chiller plant established in dynamic transient simulation program (TRNSYS), the four-variable quadratic orthogonal regression experiments were carried out by taking cooling load, cooling water supply temperature, cooling water flow rate and chilled water flow rate as variables, and the fitting formulas expressing the relationships between the total energy consumption of chiller plant with the four selected parameters was obtained. With the SAS statistical software and MATHEMATICA mathematical software, the optimal chilled water flow rate and cooling water flow rate which result in the minimum total energy consumption were determined under continuously varying cooling load and cooling water supply temperature. With regard to a chiller plant serving an office building in Shanghai, the total energy consumptions under different control strategies were computed in terms of the forecasting function of cooling load and water source temperature. The results show that applying the optimal control strategy to the chiller plant can bring a saving of 23.27% in power compared with the corresponding conventional variable speed plant, indicating that the optimal control strategy can improve the energy efficiency of chiller plant.
Starting Page	573
Ending Page	579
Page Count	7
File Format	PDF
ISSN	10059784
Journal	Journal of Central South University of Technology
Volume Number	18
Issue Number	2
e-ISSN	19930666
Language	English
Publisher	Central South University
Publisher Date	2011-04-26
Publisher Place	Heidelberg
Access Restriction	Subscribed
Subject Keyword	chiller plant control strategy variable speed cooling water flow rate chilled water flow rate Metallic Materials Engineering
Content Type	Text
Resource Type	Article
Subject	Mechanics of Materials Materials Science Mechanical Engineering

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