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Design a coarse screen and calculate the head loss through the rack, using the following information: Peak...

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Civil Engineering

Design a coarse screen and calculate the head loss through therack, using the following information:

  • Peak design wet weather flow 1.98 /s

  • Velocity approaching rack at peak wet weather flow 0.80 m/s

  • ? = 50°, with a mechanical cleaning device.

  • The bars are 12mm thick and opening are 35 mm wide.

  • Upstream depth of wastewater 1.52 m(Not depth of screen)

  • Use rectangular bars with semicircular upstream face

Calculate:

a)      Screen dimensions: height andwidth.

b) The number of bars.

c)      Velocity through screenbars.

d)     Width of the channel.

e)      Head losses through thescreen.

Answer & Explanation Solved by verified expert
3.6 Ratings (480 Votes)
a b d Screen dimensions height and width Number of barsClear area through rack opening peak flow velocity throughrackvrA 198 080 2475 m2Clear width of rack opening Clear Area Depth of floww 2475 152 1628    See Answer
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