Cook Legacy CollegeTraining Module P3000:

Intake Structures and Equipment

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Goals of This 15-Minute Module

Understand the general types of intake structures

Understand physical and hydrodynamic exclusion principles for intake structures, and associated intake structure design

Identify technology based solutions to common intake structure problems

Apply principles to intake structure size

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3

Intake Structures and Equipment Fundamentals

IS 103:Review and

Quiz

IS 102: New Knowledge/

Skills & application

IS 101: Fundamentals

4

Typical Intake Structure Layouts

5

Hydrodynamic Zone of InfluenceHZI - The area around the intake through which intake flow is impacted.

6

Minto Fish Collection Facility Case Study

The Minto Fish Collection facility used flat panels and a gallery of air burst manifolds to maintain clean screens to aid in fish passage.

7

Intake Structure Sizing

1. How much filtration

2. Volume of flow

3. Approach & sweeping velocity

4. Head loss

The Starting Point for Sizing is the Same as Any Other Process Technology

8

Basic ScreenTo interface with water body

“OUT”

Detailed Design:Geometry

MechanicalFeaturesControls

Reliability, Availability

“IN”

Water NeedCurrent Demand

Growth ProjectionsRedundancy

9

Intake Structure Design

Intake Structures are Designed by the Right Application of:• Site• Location• Screening Technology

10

Catch & Separate and Velocity Reduction

11

Cost Drivers

12

Technologies and Equipment

13

Wedgewire Screens

Wedgewire Screens:•Screens that don’t clog or kill fish.•Cook Legacy flow modifier•Several install options•No moving parts

14

Traveling Screens

Traveling Screens:•Low Maintenance•Fish Friendly•Debris Handling

15

Traveling Screens

Take-up System

Stainless Steel Carry-way

Carbon or Stainless Steel Outer Frame

16

Hydrolox Drive Mechanism and Fish Delivery

• Identical split stainless steel 13.5” diameter drive sprocket for both screen types.

• Light weight polymer material (40% less) and full width engagement enables faster response times and instantaneous screen speed changes during debris episodes.

• Hydrolox screens are designed to run 24/7.

• Positive drive system distributes load across the entire screen width; eliminates mis-tracking, uneven wear and transmits consistent torque

Low Pressure Spray Header

High Pressure Spray Header

Fish Trough

Debris Trough

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Beaudrey WIP

Designed to fit into existing channels

Rotating screen removes debris

No carry over

Can integrate a FPS

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Behavioral Options

Acoustic Avoidance

Electric Guidance

Gunderboom AFB

19

Jacquelyn™ Coating: Features and Benefits

Jacquelyn coated screen sample on right stays free of biofouling, while the screen on the left is covered. (Florida Marine Institute Salt Water Test)

20

IceBreak™ Systems

IceBreak™ Systems•Eliminates Frazil Ice – Explanation…• Control algorithm delivers the right

volume for the temperature• Seamlessly integrated into AirBurst™

Frazil Ice

21

Sizing a Tee Screen

Design Inputs

Detailed Drawings

22

Coanda Screens

Coanda Screens• Water carries over fish and debris as clean water falls through• Tough screens with low

maintenance

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Coanda Effect and Sizing Variables

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Review Questions

• Define approach velocity.

• Based on testing performed by Alden, what is the ratio of sweeping to slot velocity at which fish are able to sense and avoid a screen flow field.

• When sizing a Coanda accelerator, what are the interrelated variables one must account for?

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