Water hammer analysis for the regional water distribution system Bribin Indonesia

FIRMANTO, Andri Budhiman, Dr.-Ing. Ir. Agus Maryono

2009 | Tesis | S2 Magister Sistem Teknik

Water distribution systems are almost never in steady state conditions, because the flows in pipelines vary with the demands of connected consumers. Unsteady or transient flow may be initiated by the operating system or develop as a result of poor selected elements. This master thesis analyzed water hammer phenomena due to non-steady operation systems in the regional water distribution network of Bribin, which is located in Gunung Kidul district, Java, Indonesia. The analysis of water hammer was initially examined by elaborating models of three study areas. Analysis was done through the systematic data collection from ArcGIS, technical reports and direct measurements. Transient flow conditions in each model were simulated by using Flowmaster V.7 software which enables engineers to design alterations, changing boundary and operating conditions, component sizing, and other variables that will affect the overall performance of the water distribution. Critical scenarios for each system were determined by analyzing possibilities of operating system which may cause exceedance of limiting conditions. In order to keep the sustainability of the distribution system, the simplest and most economic solution has been designed to get the best closing time and then followed by changing valve movement. Comparisons of two different types of valves have also been analyzed in order to determine the effects of changing the valve in avoiding hazardous transient flow in the present water supply system.

Kata Kunci : Water hammer, Water distribution system, Transient flows, Flowmaster