Method for modeling and calculating water distribution networks
with sources of variable pressure and flow (for discussion)

Summary

The paper dwells upon improving the hydraulic calculation method for water supply networks with sources with the pressure and water flow related by a certain dependence. Changes in the traditional calculation scheme with a common fictitious source are proposed that provide for considering several different types of sources connected to one network node. For this purpose, introducing a fictitious intermediate node and sections between each source and the network that form new contours is proposed. A general algorithm for hydraulic calculation is proposed and a method for determining sectional pressure losses in fictitious sections is given. An example of the calculation sequence for a double circuit network with two pumping stations and two consumers is given to illustrate the method. It is found that the convergence of the Newton method for solving a system of nonlinear algebraic equations simulating flow distribution according to two Kirchhoff’s laws can be improved by modifying the equations of contour pressures. An online computer application for testing the operability and implementation of the proposed method is presented.

Key words

water supply network , hydraulic design , pumping station , calculation method , Newton method