(PDF) Design of water distribution system using EPANET
Added on 2021-05-25
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Haseeb Ullah khan {FA18-CVE-070} Water supply network and distribution using Epnet software.
Objective of this presentation. -Understand why it is necessary to make a water supply simulation -What to consider before, while and during the simulation -How the software works, without becoming an expert
What is Epanet •EPANET is a computer program that performs extended period simulation of hydraulic and water quality behavior within pressurized pipe networks. •It reproduces the behavior of a network in order to carry out tests and find solutions. •It makes a mathematical representation of the relationships among its components. It runs trials on “what would happen if...” Introduction to Epanet
Before starting with Epanet When shall we build a network? •Concentrated population •Population has social cohesion •The water source can be exploited in a sustainable way
Before starting with Epanet When shall we build a network? •It should not create environmental problems (stagnant water, drainage •Topography should allow the project (cost, pumping, flat area) •Consider the context Urban developed countries vs rural developing country
Before starting with Epanet Why should we calculate network? •Networks that aren’t designed properly devalue the work and effort of communities (and donors/Authorities) that are asked to collaborated •They are dangerous. The emptying and filling of pipes due to lack of pressure sucks pathogens into the interiors of the pipes, facilitating contamination of the pipes, therefore disease proliferation. •They are fragile. Depressurized networks get full of air. When they are filled with water, the air needs to be evacuated => Risk of water hammer (destroy pipes, creates cracks and leaks) •The network might not be extendable •The selected material / size might not be the economical solution
Before starting with Epanet What Epanet can do •Determining what pipes with which diameters should be used •Determine what improvements and /or extensions the network needs •Determine where to install the tanks, valves and pumps •Dimensioning of tanks •Pumps selection •Studying chlorine’s behaviour and the necessity to establish secondary chlorination points. •Estimation of energy consumption for pumps •Simulation of the behaviour of different element, such as pressure reducing valves, pressure sustaining valves
Before starting with Epanet What Epanet can NOT do •Epanet assumes the quasi-equilibrium condition. It can not simulate abrupt changes in the network (i.e. energy failure at pumping station, water hammer, sudden shutting of a non return valve, pipe bursting, etc. •Evaluate the consequences for the presence of air inside the network •With Epanet is not possible to simulate open channels (river, sewer) (SWMM :Storm Water Management Model)
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