1 / 18

Hydraulic Modeling of Water Distribution Systems

Hydraulic Modeling of Water Distribution Systems. Grady Hillhouse M. Eng. Water Resources Engineering Texas A&M University. Introduction. A large percentage of EWB projects involve water. Many of these project include a transmission or distribution component.

aleshanee-clark
Download Presentation

Hydraulic Modeling of Water Distribution Systems

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Hydraulic Modeling of Water Distribution Systems Grady Hillhouse M. Eng. Water Resources Engineering Texas A&M University

  2. Introduction • A large percentage of EWB projects involve water. • Many of these project include a transmission or distribution component. • A basic understanding of pressure conduit hydraulics is essential when designing water infrastructure. • In situations where solving pipe networks is too complex, modeling becomes necessary.

  3. Outline • Introduction to pressure conduit hydraulics • Introduction to EPA NET • Basics of Modeling • Only an introduction • If you have questions, ask!

  4. Pressure Conduit Hydraulics • Summed up in two equations: constant

  5. Head Loss • Darcy-Weisbach head loss equation

  6. Head Loss (cont.)

  7. Pipe Networks Demand

  8. Solving Pipe Networks • Continuity at nodes

  9. Solving Pipe Networks • Fixed grade node paths

  10. Solving Pipe Networks • Loop Equations

  11. Hydraulic Grade Line • Total energy less velocity head

  12. EPANET • Public domain (free!) • Relatively simple • Uses the gradient method to solve pipe networks for flows and pressures.

  13. Components in Models • Node – junction between other model elements. Can have external demands. • Pipe – convey water between nodes. • Reservoir – infinite source of water with a constant or periodically changing water surface elevation. • Tank – stores water . Water surface is at atmospheric pressure. • Pumps – impart energy to water • Valves – various methods of controlling flow or pressure

  14. Skeletonization • Depending on the complexity of the system you’re modeling, in may benefit you to simplify the model.

  15. What you provide the model • Layout and parameters of infrastructure • Demands • Initial conditions

  16. What the model provides for you • Flow rates in pipes and tanks • Pressures at nodes

  17. Examples

  18. Final Notes • A model is only as good as the input data you provide. • Reference the user’s manual! • Never ask the model to do something you don’t understand. • Always verify results by checking with hand calculations. • Questions?

More Related