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Elgin Equipment Group provides multiple options for 316b solutions so that we are equipped to provide equipment for a wide variety of sites.
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EEG Water316(b)
Summary of 316b
There are 544 U.S. power plants and several other facilities that will be affected by 316(b). These facilities withdraw at least two million gallons per day of cooling water.
The national requirements will be implemented through National Pollutant Discharge Elimination System (NPDES) permits. It requires that existing facilities that withdraw at least 25% of their water from an adjacent waterbody exclusively for cooling purposes reduce fish impingement.
EPA 316(b)
The EPA gives generators seven options for meeting “best technology available (BTA)” requirements for reducing impingement:• Closed cycle cooling
• Reduced design intake velocity*
• Reduced actual intake velocity*
• Velocity caps
• Modified traveling screens
• Seasonally deployed barrier nets
• Aquatic filter barriers*
* The velocity reduction and aquatic filter barrier equipment are available from Cook Legacy.
EPA 316(b)
Closed Cycle Cooling
Modified Traveling Screens
Seasonally Deployed Barrier
Net
Velocity Caps
Drum Screens
Tee Screens
Flat Panel Screens
Aquatic Filter
Barrier
Cook Legacy 316(b) ScopeProduct Description Highlights
Materials
Jacquelyn Coating Permanent metal coating that resists bio-fouling
Effective, safe for the environment, permanent solution. Less expensive than temporary coatings or building from other materials.
TIG-Welded Wedge Wire
Durable, strong, & flat wedge wire Tougher & stronger than resistance weld, better for stringy debris & ice than profile bar
Solutions
Tee or Drum Screen Cylindrical screens that don’t clog or kill fish
New flow modifier is most efficient on the market, and can be scaled for specific site.
HemiScreen Half cylinder screen for shallow water
Offers good performance, and no moving parts
AirBurst System to deliver a controlled burst of air to clean screens
Our experience ensures a system that works “out of the box” rather than costly mechanical integration
IceBreak System to deliver intermittent air near the intake to prevent icing
Integral add-on to the airburst system is more cost effective than stand-alone. Our IceBreak algorithm supports efficient mixing.
Debris Jet System to deliver sparge of air to halt debris
Bring screens to shallow water
Bubble Meter Monitors head loss across a screen Ensures that the screen is free of debris
Flow Blade Induces sweeping velocity in stagnant water
Supports fish passage in estuarine or intermittent flow environments
Cost Comparison
Technology Site-Specific Cost (Million USD)
Wedge Wire Screens $3.5-$144
Aquatic Filter Barriers $9-72
Barrier Nets $0.1-$14
Modified Traveling Screens $0.3-$44
EPA 316(b)
Meeting impingement standards with Wedgewire screens:
1. Lower design velocity
2. Sensitivity analysis & standard orientations go here.
EPA 316(b)
Make it easy to installTraveling screens - fit with civil work
Wedgewires - fit in the water body
Traveling Screen Considerations
• Velocity & resulting screen quantity• Civil work for screen fit• Civil work for additional bypass • Ongoing operation & maintenance
Wedgewire Screen Considerations
• Velocity & resulting screen quantity• Water body• Water quality
Important Details: Flow modification
Old Flow Modifier
Velocity comparison
Feature Description
Ingersoll Rand Air Compressor Reliability of with industry leader
RAMA™ Control System and easy-to-use HMI Monitor and control the system in an intuitive manner
Icebreak™ System Control ice
Bubbler System Monitor head loss
AirBurst Systems
Literature Review
• Testing has been performed on wedgewire screens for decades• Alden Lab performed study of 0.5 and 1.0mm slot
wedgewire screens on behalf of EPRI• Egg and larvae were excluded in most cases
considered• The screen performance in estuarine environments
was impacted by the maximum slot velocity & the ratio of maximum to slot velocity
Gunderboom MLES
MLES™ Aquatic Filter Barrier | Gunderboom
Basic System :• Full-water-depth filter curtain comprised of treated polypropylene/polyester fabric• Suspended by floatation billets on the water's surface• Patented systems
EPA 316(b)
MLES™ Aquatic Filter Barrier | Gunderboom
FlotationEngineered for current water level and service life
Mooring system/ Structural supportAnchors design to the substrate
Filter materialStrong, precise, and durable porous filter
Strengthening ElementsThe “skeleton” of the system
EEG Total Water Supply
Intake Structure Equipment
Turnkey Solutions Water supply on demand
EEG Total Water Supply
Intake Structure Equipment
Turnkey Solutions Water supply on demand
SCOPE
• Design• Equipment• Commissioning
• Design• Equipment• Commissioning• Installation
• Design• Equipment• Commissioning• Installation• Service• “Selling Water”
Case Study: Traveling Screen Retrofit
Project:Cooling water intake system
Problem:Fish concerns & maintenance on traveling screens
Solution:New wedgewire screen with low velocity to avoid clogging.AirBurst™ SystemInstallation
Payback:24 months
Case Study: Raw Water Intake
Project:Raw water supply for a complicated waterway
Problem:The system required complicated screen:pump interaction
Solution:Turnkey design led by the pump team performed the conceptual design, site design, modeling, and execution
Benefit:Fast project performed under planned budget
Case Study: Flat Panel Wedgewire Array
Project:Fish Passage Screening
Problem:A hydro project required fish friendly screening for a fish attraction facility
Solution:A bank of wedgewire screens with a custom airburst system
Benefit:Successful project with “best screens USACE had ever seen” ahead of schedule
Case Study: 316(b) for Oil & Gas
Project:Oil & Gas Terminal
Problem:An Oil & Gas developer was preparing an offshore terminal.
Solution:A CFD analysis of the site & development of an innovative sensor scheme. Also provided technical & communication strategy support.
Benefit:Practical & constructable modification to the screen to comply with regulations.
Case Study: Thermal Power Hatchery Intake
Project:Thermal Power Intake
Problem:A regional power utility needed to modify their intake structure to comply with regulation.
Solution:A turnkey equipment package including screens, piping, and an airburst.
Benefit:Successful project integrated with existing work ahead of schedule
Case Study: Aquatic Filter Barrier
Project:Fish protective filter for art project
Problem:Fish concerns for public art project
Solution:Aquatic filter barrier system to protect fish eggs & larvae
Benefit:Enabled project to progress
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