variable frequency drive pump Articles

  • Techno-economic feasibility study of providing variable frequency drive for high pressure pump, SWRO plant at NDDP, Kalpakkam

    The cost of product water is a key factor in determination of acceptability of any desalination system and plant. In case of Sea Water Reverse Osmosis plants, most of the energy consumed is in the form of electricity. The High Pressure Pump (HPP) is the single major energy consuming equipment with a share of above 75%. Hence reduction in energy consumed by HPP will have a substantial effect on ...


    By Inderscience Publishers

  • Frequency pressure regulation in water supply systems

    In water supply systems, pressure management in most cases is proven to be the most cost-effective activity related to water loss control. As an advanced method of pressure control, it is possible to use variable frequency drives for centrifugal pump control. Pressure regulation can be performed with constant pressure or with proportional pressure control. The application of proportional ...


    By IWA Publishing

  • Realizing energy savings in water processing applications using medium voltage adjustable frequency drives

    Why uptime and energy efficiency matter in water processing Making sure that systems and processes are up and running while improving energy efficiency (and cost) is crucial in water processing applications. During the recent recession, federal and municipal budgets tightened, limiting access to capital across the United States. At the same time, increased awareness of the ...


    By Eaton Corporation

  • VFD for pumping systems

    Pumping systems account for nearly 20% of the world's electrical energy usage. In some process plants, the VFD for pumps and fans together account for between 50% and 80% of the total electricity used. Very rarely have I come across pumps operating with fully open discharge valves. The same is the case for fans with dampers. ...


    By Variable Frequency Drives

  • Dredge Pumping Systems Improve with VFD Motor Controls

    Submitted by Dave Stoltenberg, Dredge Rental Specialist, SRS Crisafulli Pumps and Systems recently published an article by Christopher Jaszczolt titled “VFDs Improve Motor and Pump Control”.   The article discussed current applications of variable frequency driven (VFD) motor controls as an excellent method ...


    By SRS Crisafulli, Inc.

  • Lindsay Irrigation advances Watertronics AG Pump Stations case Study

    When AJ Ochoa, a fourth generation Othello, Wash. farmer pushed one button to start his new Watertronics® agricultural pump station, he became one of the first irrigators in the world to reap the benefits of a fully integrated pump and center pivot water control package. Even more important to Ochoa, he began realizing immediate and substantial reductions in energy, water and labor costs. ...


    By Lindsay Corporation

  • Silo Storage Stirrer Standard Shaft Mounted Gear Drive

    TheSilo Storage Stirrer mixer is a continuous discharge type mortar mixer which is developed and manufactured according to domestic and foreign technical and practical working conditions. It adopts anti-separation mortar storage tank and drum mixer continuously. Sexual closure and fusion, the mortar directly enters the mixing tank water pump through the guide butterfly valve to automatically add ...


    By Sogears

  • A visual tool to calculate optimal control strategy for non-identical pumps working in parallel, taking motor and VSD efficiencies into account

    A simple graphical tool was developed, that finds the optimal combination of pumps and their rotational speeds for all possible working points for a pump battery. The tool was integrated into EPANET as well as EPA SWMM simulation packages. The tool allows us to analyse and optimize operation non-identical parallel pumps with different minimum and maximum frequencies for all possible working ...


    By IWA Publishing

  • CSV’s replace VFD’s case study

    Variable Frequency Drives or VFD’s do not save energy! It is a myth that VFD’s save energy. The average person and even many “experts” may think it completely logical that reducing the RPM of a pump also reduces the amount of power used. This is Absolutely False!! A VFD always causes more energy to be used per gallon produced. The Cycle Stop Valve or CSV is ...


    By Cycle Stop Valves, Inc.

  • Novozymes

    Novozymes Highly Efficient and Reliable DESMI Pumps for Pharmaceutical Company - DESMI Pumps used as cooling pumps in Novozymes Biotechnology Tianjin. Novozymes has invested in additional enzyme granulation capacity at its Chinese Tianjin plant. As one of Novozymes’ three strategic production bases around the world, the plant is capable of ...


    By DESMI A/S

  • Clean Marine Case Study

    EGC unit complete with 2 fans and 5 exhaust gas connec-tions, pumps with variable frequency drive, filters, cooler, NaOH dosage system, gas (SO2/CO2) and water (PAH , turbidity, pH, flow) analyzers, temperature and pressure monitoring, valves, flow meters, exhaust dampers (bypass), switchboard, PLC, Documentation and ...

  • Xylem unveils fifth generation HYDROVAR

    Highly efficient variable speed drive reduces energy consumption Xylem, a global water technology leader, has released the fifth generation HYDROVAR, an intelligent pump controller that accurately adapts to system demands, helping end users realize cost and energy savings while achieving optimum system performance. The new drive can reduce energy consumption of a pump by as much as 70 ...

  • Vibration – What is It? How does it Affect My Operation? What can I Do About It?

    ABSTRACTThis paper describes how pump vibration can create problems in conveyance systems. Potential sources of vibration are reviewed as well as factors that affect pump vibration. Examples are presented that demonstrate pump vibration problems: (1) when a wet well level was lowered to obtain system storage capacity, (2) in a new installation, and (3) when one pump in an installation functioned ...

  • Pumping Wastewater into Existing Pressure Sewer

    Romtec Utilities designs, manufactures, and supplies pumping systems for many different applications. Our systems include all structural, all mechanical, all electrical, and all communications systems in a single purchase. Many of our systems are designed and supplied to handle sewage and wastewater flows in a lift station design. In many scenarios, these lift stations ...


    By Romtec Utilities Inc.

  • Joint German-Polish sewage plant satisfied with Allweiler pumps after 12 years

    An example of successful German-Polish collaboration In May 2010 the Gubin sewage plant celebrated its twelf-year anniversary. This plant processes wastewater from the cities Guben and Gubin, located on opposite sides of the Neisse River. It is the only German-Polish project of this type to operate successfully for the long term. Major elements of the plant include 17 progressing cavity ...


    By ALLWEILER GmbH

  • City utilizes leading edge controls for water filtration operation case studies

    Background “Where the Prairie Meets the Pines.” This is the city slogan for Fosston, Minnesota. It instantly conjures images of a tranquil, natural rolling landscape for this northwest Minnesota town of 1500 residents. Surrounded by farmland and with two wildlife refuges nearby, picturesque scenery abounds. It is here that computer and PLC technology have been optimized. This ...


    By Filtronics, Incorporated

  • Water recovery system reduces soft drink manufacturers water waste by 35%

    The filtration and water treatment specialist Puresep provide leading soft drinks manufacturer with a state of the art system to reduce their water usage Puresep were contacted to look at ways the soft drinks manufacturer could reduce the amount of rinse water sent to drain – in order to help them achieve their water reduction targets Following an onsite review of the current rinse ...


    By Water Active Ltd

  • Genesee county waste water drain commission

    Michigan county selects a Cornell pump for its new pump station. Genesee County, where Flint, Michigan is located, had an issue with their wastewater Pump Station No 1. Employing a vertical line shaft and dry pit pump design, the station was becoming increasingly expensive to maintain and operate. Adding to maintenance issues were the pump station’s age and ...


    By Cornell Pump Company

  • Pump Station call outs a thing of the past - Case Study

    It’s 2:00 AM and a telephone rings in Eckville, Alberta. Rick McKinnon checks the display on his cell phone and groans. It’s another high level call out alarm from one of the town’s new sewage lift stations. He knows before he drives there that the system will be running on floats instead of the new ultrasonic level controller. ...


    By Greyline Instruments Inc.

  • Stormwater Solids Reduction for NPDES Permits

    Finally obtaining a National Pollution Discharge Elimination System (NPDES) Permit is often a relief but is by far not the end of the story. Meeting the requirements of that permit often proves to be quite difficult and stiff fines are freely doled out to those who fail to meet regulatory limits. For one Midwest jet propulsion manufacturing facility, the issue of total daily solids discharge ...

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