The following information was submitted:
Transactions: INTERNATIONAL JOURNAL of ENERGY and ENVIRONMENT
Transactions ID Number: 20-437
Full Name: Ioan Sârbu
Position: Professor
Age: ON
Sex: Male
Address: Piata Bisericii, no. 4A, ap.3, 300233 Timisoara
Country: ROMANIA
Tel: 0040256403992
Tel prefix: 0040
Fax: 0040256403987
E-mail address: ioan.sarbu@ct.upt.ro
Other E-mails: ioan_sarbu@yahoo.com
Title of the Paper: Nodal analysis of looped water supply networks
Authors as they appear in the Paper: Ioan Sârbu, Emilian Valea
Email addresses of all the authors: ioan.sarbu@ct.upt.ro, emilian.valea@ct.upt.ro
Number of paper pages: 9
Abstract: There are three methods for analyzing flow and pressure distribution in looped water supply networks (the loop method, the node method, the element method) taking into consideration hydraulic parameters chosen as unknown. For all these methods, the nonlinear system of equations can be solved by iterative procedures (Hardy–Cross, Newton–Raphson, linear theory). În the case of extending or rehability distribution networks the unknown parameters being the piezometric heads at nodes, the node method for network analysis is prefered. In this paper is formulated a generalized classic model for the nodal analysis of complex looped systems with non-standard network components and the solvability of new problems, alongside the determination of pressure state in the system. Also, this paper shows a different approach to this problem by using the method of variational formulations for the development of an improved model based on the unconditional optimization procedures. Thi!
s model has the advantage that it uses a specialized optimization algorithm which minimizes directly an objective multivariable function without constraints, implemented in a computer program. The paper compares proposed models to the classic Hardy–Cross method, and shows the good performance of these models. Based on these models a study regarding implications of pipe network longtime operation on energy consumption is performed.
Keywords: Water distribution, Looped networks, Hydraulic analysis, Node method, Classic and variational formulation, Computational models.
EXTENSION of the file: .pdf
Special (Invited) Session: Nodal analysis models of water supply networks
Organizer of the Session: 649-177
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