| Summary: | 碩士 === 義守大學 === 機械與自動化工程學系 === 106 === Water supply systems (WSS) of tall buildings in Taiwan generally adopt the gravity-tower way to supply water. In the present study, a WSS layout was created for three buildings in a multiple-unit complex by using EPANET to trace the water intake time of roof towers and underground tanks in the network. A relation was made between user demands and water supply nodes via the design parameters of user’s demand patterns, base demands, and pump controls, etc. The synchronization phenomenon caused by multiple-buildings water intakes was analyzed using the concept of DMA (District Metering Area). Besides, the factors resulting in the synchronization and its impact on the pressure fluctuation were studied based on the volume ratio of water storage equipment and the demand pattern of users. An Index of Synchronization (IS) was defined to describe the influence level of the multiple-buildings intakes. Finally, an algorithm (OSWSSA) for operating-valve (or pump) schedules was proposed to avoid the synchronization and stabilize the pipeline pressure for water supply systems.
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