Design
DESIGN & SPECIFICATION
ETS are experts in the application of Ultraviolet light, offering a range of medium pressure amalgam lamp technologies, allowing for tailored and cost efficient solutions for a variety of pool and leisure applications. Flexible designs ensure ETS can provide advanced technology solutions for both new installations and retrofits of existing venues, in a range of difficult and challenging environments. With a vast product range catering for a variety of applications from only a few gpm to treating in excess of 5000 gpm in a single system, ETS can provide effective solutions for any specification.
The use of CFD design tools is now standard practice within the industry. ETS designs are extensively CFD optimized to ensure that the fluid flows uniformly through the chamber.
The flow profile is produced from the chamber geometry, flow rate and particular turbulence model selected. The radiation profile is developed from inputs such as water quality, lamp type (power, germicidal efficiency, spectral output, arc length) and the transmittance and dimension of the quartz sleeve. Proprietary CFD software simulates both the flow and radiation profiles.
Once the 3-D model of the chamber is built, it is populated with a grid or mesh that is comprised of thousands of small cubes. Points of interest, such as at a bend, on the quartz sleeve surface, or around the wiper mechanism use a higher resolution mesh, while other areas within the reactor use a coarse mesh.
Once the mesh is produced, hundreds of thousands of virtual particles are "fired" through the chamber. Each particle has several variables of interest associated with it, and the particles are "harvested" after the reactor. Discrete phase modeling produces delivered dose, headloss and other chamber specific parameters.
Once the modeling phase is complete, selected systems are validated using a industry recognized professional third party to provide oversight and to determine how closely the model is able to predict the reality of system performance. System validation uses non pathogenic surrogates to determine the Reduction Equivalent Dose (RED) ability of the reactors. Systems are validated to deliver the effective dose within an envelope of flow and transmittance in accordance with the professional practices summarized in the USEPA DGM methodology ( The US EPA Ultraviolet Disinfection Guidance Manual dated November 2006).
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