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Emerging Technologies Aeration Objective: Utilizing inlet guide vanes and variable outlet vane diffusers on a single stage centrifugal blower makes it possible to operate the blower at its highest efficiency point. Description: March 2013 prepared 2012 Technology Summary State of Development: Innovative (some, but not all turbocompressors, are innovative). Single-stage Centrifugal Blowers with Inlet Guide Vanes and Variable Diffuser Vanes Single-stage centrifugal blowers equipped with inlet guide vanes pre-rotate the intake air before it enters the high speed blower impellers. This reduces flow more efficiently than throttling. Blowers that are also equipped with variable outlet vane diffusers have improved control of the output air volume. Utilizing inlet guide vane and discharge diffusers on a single-stage centrifugal blower makes it possible to operate the blower at its highest efficiency point, not only at the design condition but also within a greater range outside of the design condition. A programmable logic controller (PLC control) can be used to optimize inlet guide vane operation (i.e., positioning) based on ambient temperature, differential pressure, and machine capacity. Automated DO and variable header pressure control can increase efficiency. Comparison to Established Technologies: Increased energy efficiency compared to positive displacement blowers. Can be less maintenance intensive, and can result in lower monitoring/operational costs if properly automated. Available Cost Information: Project Cost of $901,000 for an 11.8 MGD plant (average daily flow) with average energy savings of $63,889/yr and a simple payback period of 14 years. Vendor Name(s): Siemens Industry, Inc. Water Technologies Telephone: 866-926-8420 or 724-772-1402 Web: www.water.siemens.com Key Words for Internet Search: Installation(s): Sheboygan Regional Wastewater Treatment Plant 3333 Lakeshore Drive Sheboygan, WI 53081 Dale Doer Wastewater Superintendent Telephone: 920-459-3464 Single Stage, Email: Dale.doerr@sheboyganwwtp.com Single Stage Blower, Inlet Guide Vanes, Variable diffuser Vane Data Sources: USEPA (2010) Evaluation of Energy Conservation Measures for Wastewater Treatment Facilities. Office of Water. EPA 832-R-10- 005 September 2010. http://water.epa.gov/scitech/wastetech/upload/Evaluation-of-Energy-Conservation-Measures-for-Wastewater- Treatment-Facilities.pdf 6-8 Wastewater Treatment and In-Plant Wet Weather ManagementPDF Image | Emerging Tech for Wastewater Treatment
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