Hydrodynamic separation devices - system and component sizing
Hydrodynamic separation devices - system and component sizing
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| Device | Land use | Downstream BMP (type) | Mechanism enhancement | Sizing calculations | Inlets | Outlets | Openings | Flow diversion structures |
|---|---|---|---|---|---|---|---|---|
| Vortechs TM by Contech | Ultra-high density, Industrial, Commercial, "Hotspots" such as gas stations or high vehicular traffic areas | Filtration, Detention/Infiltration, Rainwater Harvesting | Yes | Each system custom sized for site one of two ways: to provide a specific removal efficiency of a predefined particle size distribution, or by the Rational Rainfall Method. In most cases, pollutant removal goals can be met with a smaller system configured with an external bypass | Perpendicular to vault to be tangential to grit chamber to induce swirling flow pattern | Orientation determined for each system | Low flow control orifice sized to submerge inlet pipe when operating at 20%, High flow control weir sized to pass peak system capacity minus peak orifice flow | Baffle wall, circular grit chamber, flow control chamber, oil chamber |
| Continuous Deflective Separation (CDS) R by Contech | Ultra-high density, Industrial, Commercial, "Hotspots" such as gas stations or high vehicular traffic areas | Filtration, Infiltration, Detention | Yes | Three primary methods of sizing system: the Water Quality Flow Rate Method to provide a specific removal efficiency of a predefined particle size distribution, the Rational Rainfall Method, or the Probabilistic Method when a specific removal efficiency of net annual sediment load is required | Grate inlet at street level and pipe inlet (may have multiple), inlet throat area sized to pass flow at surface elevation equal to crest of diversion weir, can be widened to increase capacity | Diversion weir length and height dimensions determine hydraulic capacity of system | Diversion chamber, diversion weir, separation chamber, separation screen, oil baffle | |
| Downstream Defender TM H.I.L. Technology | Ultra-high density, Industrial, Commercial, "Hotspots" such as gas stations or high vehicular traffic areas | Filtration, Infiltration, Detention, Wetland | Yes | Q = ciA (runoff coeff. * intensity * area), then see Table 1 (NJCAT) or refer to sizing calculator from manufacturer (does not require registration) or updated design tool (requires registration) | Tangential to chamber | Sloping base joined to a benching skirt at a 30-degree angle, dip plate | ||
| First Defense R by Hydro International | Ultra-high density, Industrial, Commercial, "Hotspots" such as gas stations or high vehicular traffic areas | Filtration, Infiltration, Detention | Yes | Q = ciA (runoff coeff. * intensity * area), then see Table 1 (NJCAT) or refer to updated design tool from manufacturer (requires registration) | Grate inlet at street level and pipe inlet (may have multiple), max pipe diameter = 18-48 in | Max pipe diameter = 18-48 in, Min dist from outlet invert to top of rim = 2-3.5 in to 3-6 in depending first on model then on pipe diameter | Built-in bypass, inlet chute | |
| Stormceptor R by Imbrium or Rinker Materials | Ultra-high density, Industrial, Commercial, "Hotspots" such as gas stations or high vehicular traffic areas | Filtration and Detention/Retention systems | Yes | PCSWMM for Stormceptor available from manufacturer for optimal design and sizing purposes (requires registration) | Varies by model | Varies by model | Varies by model | Insert slows water and directs it to lower chamber, non-turbulent treatment chamber with bypass insert |
| Barracuda by BaySaver | Ultra-high density, Industrial, Commercial, "Hotspots" such as gas stations or high vehicular traffic areas | Filtration, Infiltration, Detention | No | Volume based, treatment chamber capacity ranges from 212 gallons to 7496 gallons | 12 in diameter, variable inlet/outlet angle configurations | 12 in diameter, variable inlet/outlet angle configurations | Weir prevents inflow from bypassing vortex separator, “teeth” reduce turbulence in sump area, inline may offer internal bypass | |
| Dual Vortex Separator by OldCastle | Infiltration, Detention, and Retention systems | Yes | See sizing and selection tool (does not require registration) | Fits 1-3 inlets, see sizing and selection tool for max pipe sizes (does not require registration) | Incoming flow directed into parallel vortex tubes, isolated storage area with baffles | |||
| SciClone TM by BioClean | Filtration, Infiltration, Detention | Yes | Single outlet | Single outlet | Flow splitter, sump chamber, outlet weir |