Engineered Aquatic Filter Barrier Systems Reliant Astoria AFB Progress Review Meeting July 9, 2003 Seattle, WA Gunderboom, Inc. – Reliant Astoria AFB – Progress Review Meeting – July 9, 2003 – Seattle, WA

Engineered Aquatic Filter Barrier Systems CFD Modeling of Rectangular Cartridge & Array Gunderboom, Inc. – Reliant Astoria AFB – Progress Review Meeting – July 9, 2003 – Seattle, WA

Design Thoughts Why limit ourselves to 7 ft long cartridges? This necessitates using too many cartridges and consequently going too deep into intake bay  potential poor flushing and flow distribution issues We want cartridges to be as exposed to East River currents as possible Intake bay is 30 ft wide so lets use it Gunderboom, Inc. – Reliant Astoria AFB – Progress Review Meeting – July 9, 2003 – Seattle, WA

Use 10 Foot Long Cartridge PRO’s Will still leave enough room for piping and support. Reduces number of cartridges from 3 to 2 1 / 2 for station test & 12 to 10 for full plant operation Gunderboom, Inc. – Reliant Astoria AFB – Progress Review Meeting – July 9, 2003 – Seattle, WA

PRO’s & CON’s CON’s Hard to move on 8 ft wide truck Unwieldy Fabric comes in 7 ft wide rolls Gunderboom, Inc. – Reliant Astoria AFB – Progress Review Meeting – July 9, 2003 – Seattle, WA

Solution Make 2 x 5 ft long sections and join together on site to form 10 ft cartridge Gunderboom, Inc. – Reliant Astoria AFB – Progress Review Meeting – July 9, 2003 – Seattle, WA

Proposed Cartridge 2 x 5 ft long sections 20.5 ft high 1 ft wide Fabric on both sides Gunderboom, Inc. – Reliant Astoria AFB – Progress Review Meeting – July 9, 2003 – Seattle, WA

Proposed Cartridge 5’ 20.5’ Gunderboom, Inc. – Reliant Astoria AFB – Progress Review Meeting – July 9, 2003 – Seattle, WA

10 Foot Cartridge Array STATION TEST Area required for station test = 812 ft 2 Cart. surf area = 10’ x 20.5’ x 2 = 410 ft 2 # cartridges required = 2.5 Allows 26% extra Effective flow rate = 7.5 gpm/ft 2 Gunderboom, Inc. – Reliant Astoria AFB – Progress Review Meeting – July 9, 2003 – Seattle, WA

10 Foot Cartridge Array FULL PLANT OPERATION Area required = 3000 ft 2 Cart. surf area = 10’ x 20.5’ x 2 = 410 ft 2 # cartridges required = 7.3  use 10 Allows 37% extra Effective flow rate = 6.5 gpm/ft 2 Gunderboom, Inc. – Reliant Astoria AFB – Progress Review Meeting – July 9, 2003 – Seattle, WA

CFD Modeling of Flow Distribution Aim is to get <25% variation across fabric Design flow = 10 gpm/ft 2 = m/s 25% = m/s Gunderboom, Inc. – Reliant Astoria AFB – Progress Review Meeting – July 9, 2003 – Seattle, WA

Test 1 4” diameter pipes 1 ft center/center spacing from middle of cartridge Uniform approach flow at m/s Examine flow pattern at width of 1 ft, 1.5 ft and 2 ft Gunderboom, Inc. – Reliant Astoria AFB – Progress Review Meeting – July 9, 2003 – Seattle, WA

Model Setup 1 ft 5 ft m/s Gunderboom, Inc. – Reliant Astoria AFB – Progress Review Meeting – July 9, 2003 – Seattle, WA

VARIATION~25%

VARIATION ~ 10%

Test 1 Results 1 ft width is borderline 1.5 ft width is good 2 ft gained little over 1.5 ft Gunderboom, Inc. – Reliant Astoria AFB – Progress Review Meeting – July 9, 2003 – Seattle, WA

Array Test ft/s approach velocity Cartridges 1 ft apart 10’ cartridges 1.5’ wide Gunderboom, Inc. – Reliant Astoria AFB – Progress Review Meeting – July 9, 2003 – Seattle, WA

0.15 ft/s

Array Test 2 1 ft/s approach velocity Cartridges 1 ft apart 10’ cartridges 1.5’ wide Gunderboom, Inc. – Reliant Astoria AFB – Progress Review Meeting – July 9, 2003 – Seattle, WA

1 ft/s

Array Test Conclusions 10 gpm/ft 2 = ft/s velocity through fabric With this low a velocity a 1’ cartridge separation is more than adequate If greater separation is required it will be because of other factors and not cartridge- cartridge flow interference Gunderboom, Inc. – Reliant Astoria AFB – Progress Review Meeting – July 9, 2003 – Seattle, WA

Other Thoughts May want to design guide rail structure to be streamlined Gunderboom, Inc. – Reliant Astoria AFB – Progress Review Meeting – July 9, 2003 – Seattle, WA

Engineered Aquatic Filter Barrier Systems Reliant Astoria AFB Progress Review Meeting July 9, 2003 Seattle, WA Gunderboom, Inc. – Reliant Astoria AFB – Progress Review Meeting – July 9, 2003 – Seattle, WA