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Assessing the optimum operating configuration for multiple chillers at Murdoch University

Ngalande, Joshua (2015) Assessing the optimum operating configuration for multiple chillers at Murdoch University. Other thesis, Murdoch University.

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This paper endeavours to answer the research question of how to efficiently operate a system of multiple chillers in the most effective combination regime. In the process, a successful method of assessing this has been developed, which has proven that the most effective way to run a multi-configuration chiller scheme is by following two distinct methods. One method deals with a multi-chiller setting that has thermal storage, and the other method deals with a multi-chiller systems without storage. The latter method is discussed more in this paper. The former method is based on other research papers that argue the easiest and most efficient method of running a multi-chiller system is to have thermal storage. This allows a staging regime that can operate any number of chillers at their maximum co-efficiency of performance (COP) or efficiency performance, while either supplying the load or charging the thermal storage. The fact that the chillers can always operate at their maximum point makes this method the most efficient available; however, in some cases there is no thermal storage available and the analysis changes slightly. A detailed analysis of the different methods of staging has been carried out and it proved that the most efficient way of running a multi-configuration setup chiller system is to run the target load closest to the next nearest chiller configuration that can supply that load. An algorithm and system has been developed on the best way to do this, and further work on how computational resources can be exploited to do this more easily is discussed.

Publication Type: Thesis (Other)
Murdoch Affiliation: School of Engineering and Information Technology
Supervisor: Pryor, Trevor and Whale, Jonathan
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