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dc.contributorDepartment of Building Services Engineeringen_US
dc.creatorGuan, Jing-
dc.identifier.urihttps://theses.lib.polyu.edu.hk/handle/200/6926-
dc.languageEnglishen_US
dc.publisherHong Kong Polytechnic University-
dc.rightsAll rights reserveden_US
dc.titleInvestigation of energy performance and optimal control of variable primary flow systemen_US
dcterms.abstractThis dissertation presents an investigation of the energy performance of variable primary flow system comparing with other types of systems in building air-conditioning systems. Optimal control strategies are studied to enhance the energy efficiency of variable primary flow system. Through a detailed analysis of the system characteristics, the pressure drop models for different water networks in air-conditioning systems are developed and then used to formulate an optimal pump control strategy. This control strategy determines the optimal variable speed frequency of pumps in operation by taking into account their power consumptions and maintenance costs. The pressure differential set-point for pumps control is reset using the online opening signals of water control valves at terminals. The performances of these strategies are tested and evaluated in a simulated module with the complex air-conditioning system in super high-rise hotel by comparing with that of other reference strategies. Both analysis - theoretical analysis and simulation study are used in investigation. The results of research have reference and values for practical application for further energy efficient analysis in chilled water system.en_US
dcterms.extent110 leaves : ill. ; 30 cm.en_US
dcterms.isPartOfPolyU Electronic Thesesen_US
dcterms.issued2012en_US
dcterms.educationalLevelAll Masteren_US
dcterms.educationalLevelM.Eng.en_US
dcterms.LCSHAir conditioning -- Energy consumption.en_US
dcterms.LCSHAir conditioning -- Equipment and supplies -- Energy consumption.en_US
dcterms.LCSHHong Kong Polytechnic University -- Dissertationsen_US
dcterms.accessRightsrestricted accessen_US

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Please use this identifier to cite or link to this item: https://theses.lib.polyu.edu.hk/handle/200/6926