Author(s): Elias Sebastião Amaral Tasca, Edevar Luvizotto Junior, Bryan Karney, Antonio Carlos Zuffo
Keywords: Hydraulic transients; Multiple-criteria decision analysis; Protection devices; AHP; Cooperative Game Theory;
Abstract: If a water main is not well protected against hydraulic transients, devastating consequences can occur. However, there are often many viable alternatives for transient protection. Multiple-criteria decision analysis (MCDA) is applied here to help select an adequate protection system for a test pipeline subject to transients arising from a pump trip. Four alternatives are developed and all of them, when well chosen, result in acceptable extreme pressures. More specifically, the considered alternatives employed devices such as hydropneumatic bladder tanks, air valves and flywheels. In order to recommend a final choice of protection system, several criteria are used: general costs, reliability of the system, reliability of the simulation model, avoidance of extreme pressures, whether sub-atmospheric or excessively high values. Functions to evaluate and rank performance, regarding each criterion, are created. The proposed MCDA approach employs both the Analytic Hierarchy Process (AHP) and Cooperative Game Theory (CGT).