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Comprehensive Guide to Water Systems Design Using EPA-NET for Pipe Networks

This guide explores the intricacies of water systems design through an example utilizing EPA-NET, a powerful software for analyzing pressurized pipe networks. It covers fundamental hydraulic principles, flow distribution adjustments, and energy loss calculations in loop systems. Key topics include how to build computation tools for "what-if" analyses, modeling various components such as pumps and valves, and simulating water quality behavior. The document also provides step-by-step instructions for project setup and data input, making it ideal for engineers and designers.

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Comprehensive Guide to Water Systems Design Using EPA-NET for Pipe Networks

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  1. CE 3372 Water Systems Design Pipe Networks

  2. Networks • Spreadsheet Example • Representative of a “by-hand” solution. • EPA NET Program Introduction • Representative of a “professional-type program” solution.

  3. Networks – Why Model? • What is the flow distribution if the demands are changed as shown? 0.1 cfs 0.4 cfs

  4. Sketch and Label

  5. Node-Arc Incidence Matrix

  6. Energy Losses in Loop • Determine “sign” for loop equations from loop traverse direction and assumed flow directions.

  7. Build a Computation Tool

  8. What If? • Once the tool is built, then “what-if” questions can be posed (as per example). • Next repeat the exercise using EPA-NET

  9. Networks • EPA Net (Computer Program) • Performs extended period simulation of hydraulic and water quality behavior within pressurized pipe networks. • Provides an integrated environment for editing network input data, running hydraulic and water qresults in a variety of formats.

  10. Networks • EPA Net (Computer Program) • Computes friction head loss using either Hazen-Williams, Darcy-Weisbach, or Chezy-Manning equations. Includes minor head losses for bends, fittings, etc. • Models constant or variable speed pumps. • Computes pumping energy and cost. • Models various types of valves including shutoff, check, pressure regulating, and flow control valves

  11. Networks • EPA Net (Computer Program) • Allows storage tanks to have any shape (i.e., diameter can vary with height). • Considers multiple demand categories at nodes, each with its own pattern of time variation • Models pressure-dependent flow issuing from emitters (sprinkler heads) • Base system operation on both simple tank level or timer controls and on complex rule-based control

  12. Networks • EPA Net (Computer Program) • EPANET models a water distribution system as a collection of links connected to nodes. • The links represent pipes, pumps, and control valves. • The nodes represent junctions, tanks, and reservoirs.

  13. Networks – Why Model? • Illustrative Example: • What is the flow distribution if the demands are changed as shown? 0.1 cfs 0.4 cfs

  14. Example in EPA NET • Install and open EPA-NET • How to install on the server as a movie. • Create a new project • Ce3372_epanet_example1 • Check defaults. • Import the backdrop (optional)

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