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CE 3372 Water Systems Design

CE 3372 Water Systems Design. Pipe Networks. Networks. Spreadsheet Example Representative of a “by-hand” solution. EPA NET Program Introduction Representative of a “professional-type program” solution. Networks – Why Model?.

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CE 3372 Water Systems Design

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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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