Design & Analysis of High Energy Piping System for Fluid Transients Phenomena

Abstract

This dissertation illustrates the Design of High Energy Piping System in thermal power plant, where catastrophic failure is not affordable due to Fluid transient events such as water hammer & steam hammer. The sudden changes in flow, velocity or pressure in closed conduit causes water hammer or steam hammer in piping system. In this work, Design & Analysis of piping system for fluid transient phenomena under both static and dynamic loading is carried out. Water Hammer Analysis of the Cooling Water System was carried out to identify the suitable location and capacity of the surge protection devices. Mainly two modes; two pump trips & one pump trip were simulated in PIPENET Transient module. Also flow induced forces are calculated using PIPENET Transient Module & stress analysis of the cooling water piping system was done in piping stress analysis software PIPSYSW 1.3 according to ASME B31.1 Power Plant Piping Code. Mathematic formulation was developed to generate complete pump characteristics curves to simulate pump transient behaviour in SCILAB. Analysed the excessive vibration problem occurred in feed water system suction piping for one of the ongoing projects using PIPENET Transient Module and PIPSYSW 1.3 to identify the unbalanced forces and the impact of the same on the existing supports. Condensate Extraction Pump start-up operation was simulated in PIPENET Transient Module and PIPSYSW 1.3 to calculate flow induced forces in condensate discharge & recirculation piping system. Stream Hammer Analysis of main steam system was carried out in PIPENET Transient Module & imbalanced forces were calculated. The same was compared with the conventional manual calculation.