Motion simulation analysis of portable accumulator for domestic water system

Lai, Wei Wein (2015) Motion simulation analysis of portable accumulator for domestic water system. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

Hydraulic transients are known as pressure surge or water hammer. It is caused by sudden changes of the water distribution network. The water hammer effect can cause serious consequences, ranging from pump defects to pipeline failures, bad water quality and health implications. This research focuses on the design and installation of a surge control device – portable hydraulic accumulator. A hydraulic accumulator is a device which stores potential energy in the form of fluid pressure, where the pressure will be released when required. The accumulator installed near the rapidly closing valve eliminates hydraulic transient by suppressing pressure pulsations or high pressure surges. This study will only include problems faced by domestic water users due to the hammer effect. An online questionnaire was conducted to gather data in order to understand the water hammer phenomenon in domestics in Melaka area. Finally, a 3D CAD drawing of the accumulator was generated and a Motion Simulation Analysis was conducted using the Autodesk Simulation Computational Fluid Dynamic (CFD) software. From the CFD analysis results, the accumulator design with three bladder balls was able to reduce 81.08% of the water velocity. The steel bladder balls were able to reduce the highest percentage of water velocity which was 77.55%.

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