POROSITY PLATE BAFFLE DESIGN FOR FISH SCREEN FLOW CONTROL Peter - - PowerPoint PPT Presentation

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Sep 13, 2022 581 likes •805 views

POROSITY PLATE BAFFLE DESIGN FOR FISH SCREEN FLOW CONTROL Peter Christensen, PE R2 Resource Consultants PLAN VIEW OF FLOATING SURFACE COLLECTOR (FSC) NET PRIMARY SECONDARY SCREENS SAMPLING AND HOLDING TRANSITION SCREENS PLAN &

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Peter Christensen, PE R2 Resource Consultants

POROSITY PLATE BAFFLE DESIGN FOR FISH SCREEN FLOW CONTROL

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PLAN VIEW OF FLOATING SURFACE COLLECTOR (FSC)

PRIMARY SCREENS NET TRANSITION SECONDARY SCREENS SAMPLING AND HOLDING

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PLAN & PROFILE VIEW OF FSC SCREEN CHANNEL

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SCREEN/BAFFLE SUPPORT STEEL

PLAN PROFILE 12” WIDE FLANGE COLUMN (TYP) 12” WIDE FLANGE COLUMN (TYP)

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SECONDARY SCREEN/BAFFLE ARRANGEMENT

SCREEN BOLTS TO FRONT OF COLUMN PRIMARY SUPPORTS SECONDARY SUPPORTS BAFFLE BOLTS TO BACK OF COLUMN

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SCREEN ATTACHED TO FRONT OF COLUMN BAFFLE ATTACHED TO BACK OF COLUMN

INSTALLED SCREEN/BAFFLE ARRANGEMENT

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SCREENS INSTALLED ON COLUMNS

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BAFFLES INSTALLED BEHIND SCREENS

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SCREEN AND BAFFLE PANELS INSTALLED

SCREEN PANEL BAFFLE PANEL BAFFLE ADJUSTMENT SCREW W12 COLUMN

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PRIMARY BAFFLE DRAWING

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SECONDARY BAFFLE DRAWING

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ADJUSTABLE UHMW PERF PLATE FIXED UHMW PERF PLATE 3”+/- DIA. PERF PLATE HOLES STIFFENER AND RETAINER BARS

BAFFLE ARRANGEMENT

FLOW

Critical that Both Plates be the Same Material Preferably a High- Strength Plastic for Flexibility and Sealing

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ATTACHMENT OF ADJUSTABLE UHMW PERF PLATE

UHMW PERF PLATE ATTACHMENTS

ATTACHMENT OF FIXED UHMW PERF PLATE ADJUSTABLE UHMW PERF PLATE FIXED UHMW PERF PLATE ADJUSTMENT SCREW

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TYPICAL PRIMARY BAFFLE PANEL

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BAFFLE PANEL SHOWING ADJUSTMENT SCREWS

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BAFFLE PANEL FRAME FABRICATION

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TYPICAL SECONDARY BAFFLE PANEL

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ADJUSTMENT SCREW

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UHMW PERF PLATES

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COMPARISON POROSITY PLATES VS. LOUVERS Louvers:

Vertical Slot along Each Edge of the Louver Blade
Flow Not Evenly Distributed over Screen Area
Small Adjustment can Have Large Impacts on Flow
Difficult to Fine Tune
Hydraulics Difficult to Pre-Design or Model Baffle Settings
Need to Field Set – Timely and Cost Consuming

Porosity Plate Baffles:

Small Baffle Holes Over Entire Area
Evenly Distributes Flow over Screen Area
Adjustments Have Smaller Impact on Flow – Easier to Fine Tune
Can Pre-Design Settings for Desired Flow Conditions
Required Field Adjustments are Minimal

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Starboard Initial Baffle Settings Port Initial Baffle Settings Baffle Panel Number Porosity (percent) Turns from Full Open (nearest 1/8 turn) Centerline Opening (inches) Baffle Panel Number Porosity (percent) Turns from Full Open (nearest 1/8 turn) Centerline Opening (inches) P1-A 13.20 6 7/8 1.85 P2-A 13.20 6 7/8 1.85 P1-B 13.20 6 7/8 1.85 P2-B 13.20 6 7/8 1.85 P3-A 13.20 6 7/8 1.85 P4-A 13.20 6 7/8 1.85 P3-B 13.20 6 7/8 1.85 P4-B 13.20 6 7/8 1.85 P5-A 13.20 6 7/8 1.85 P6-A 13.20 6 7/8 1.85 P5-B 13.20 6 7/8 1.85 P6-B 13.20 6 7/8 1.85 P7-A 13.25 6 7/8 1.86 P8-A 13.25 6 7/8 1.86 P7-B 13.25 6 7/8 1.86 P8-B 13.25 6 7/8 1.86 P9-A 13.25 6 7/8 1.86 P10-A 13.25 6 7/8 1.86 P9-B 13.25 6 7/8 1.86 P10-B 13.25 6 7/8 1.86 P11-A 13.05 7 1.84 P12-A 13.05 7 1.84 P11-B 13.05 7 1.84 P12-B 13.05 7 1.84 P13-A 12.75 7 1/8 1.81 P14-A 12.75 7 1/8 1.81 P13-B 12.75 7 1/8 1.81 P14-B 12.75 7 1/8 1.81 P15-A 12.40 7 3/8 1.77 P16-A 12.40 7 3/8 1.77 P15-B 12.40 7 3/8 1.77 P16-B 12.40 7 3/8 1.77

Starboard Pump Sump Differential 0.54 Feet Below Reservoir Port Pump Sump Differential 0.54 Feet Below Reservoir Centerline Opening