1 / 12

Water Distribution

Water Distribution. Question:. Water enters your home plumbing at ground level. Where will you get the strongest spray from a shower? In the ground floor shower In the basement shower In the second floor shower. Observations About Water Distribution. Water is pressurized in the pipes

trinity
Download Presentation

Water Distribution

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. Water Distribution

  2. Question: Water enters your home plumbing at ground level. Where will you get the strongest spray from a shower? • In the ground floor shower • In the basement shower • In the second floor shower

  3. Observations AboutWater Distribution • Water is pressurized in the pipes • Higher pressure water sprays harder • Higher pressure water sprays higher • Water is often stored up high

  4. Fluid Motion (no gravity) • Fluids obey Newton’s laws • Net forces cause accelerations • Net forces are due to pressure imbalances • Fluids accelerate toward lowest pressures

  5. Pressurizing Water • To pressurize water, • use Newton’s third law • push inward on the water • water pushes outward on you • water’s outward push is due to its pressure • water pressure rises as you squeeze it

  6. Pumping Water (no gravity) • Squeeze water to raise its pressure • Water accelerates toward lowest pressure • Water begins flowing • You do work on the water • You keep squeezing as water flows • Water moves in direction of your force • In this case: Work = Pressure · Volume

  7. Pressure Potential Energy • Pumping water requires work • Pumped water carries energy with it • Energy isn’t really stored, it’s promised • but energy resembles a potential energy • so it’s called pressure potential energy (PPE) • PPE requires steady-state flow (SSF)

  8. Energy Conservation (no gravity) • In SSF through fixed obstacles, fluid’s energy and energy/volume are constants • Energy is PPE + KE (Kinetic Energy) • Bernoulli’s equation (no gravity): PPE + KE = Constant PPE/Vol + KE/Vol = Constant/Vol (along a streamline)

  9. Fluid Motion (with gravity) • Fluids obey Newton’s laws • Weight contributes to net force • Weight creates pressure gradients • Pressure decreases with altitude • Pressure increases with depth • Fluids have gravitationalpotential energy (GPE)

  10. Energy Conservation(with gravity) • Energy is PPE + KE + GPE • Bernoulli’s equation: PPE + KE + GPE = Constant PPE/Vol + KE/Vol + GPE/Vol = Constant/Vol (along a streamline)

  11. Question: Water enters your home plumbing at ground level. Where will you get the most intense shower spray? • In the ground floor shower • In the basement shower • In the second floor shower

  12. Summary AboutWater Distribution • Water’s energy is conserved during SSF • Water’s energy changes form in pipes • Pressure drops as water’sheight or speed rise • Storing water up highgives it higher energy

More Related