DOE News
    Doe Science news source
    The DOE Science News Source is a Newswise initiative to promote research news from the Office of Science of the DOE to the public and news media.
    • 2008-11-21 12:10:00
    • Article ID: 546753

    'Fish Technology' Draws Renewable Energy from Slow Water Currents

    • Credit: Scott Galvin

      Michael Bernitsas, professor in the Department of Naval Architecture and Marine Engineering, stands before a prototype of his VIVACE hydrokinetic energy device.

    • Credit: Scott Galvin

      VIVACE, a new concept in hydrokinetic energy, can harness energy from "vortex-induced vibrations" in slow-moving ocean and river currents. Vortices in the fluid flow move the device, which is passive. A vortex can be seen in this photo.

    • Credit: Illustration credit: Omar Jamil

      An artist's illustration of an array of VIVACE converters on the ocean floor.

    The University of Michigan

    News Service

    412 Maynard

    Ann Arbor, MI 48109-1399

    Nov. 20, 2008

    Contact: Nicole Casal Moore, (734) 647-1838 or (734) 647-7087, ncmoore@umich.edu

    EDITORS: Watch and link to a video at: http://www.ns.umich.edu/podcast/video.php?id=499

    Photos are available at http://www.ns.umich.edu/htdocs/releases/story.php?id=6841

    'Fish technology' draws renewable energy from slow water currents

    ANN ARBOR, Mich.---Slow-moving ocean and river currents could be a new, reliable and affordable alternative energy source. A University of Michigan engineer has made a machine that works like a fish to turn potentially destructive vibrations in fluid flows into clean, renewable power.

    The machine is called VIVACE. A paper on it is published in the current issue of the quarterly Journal of Offshore Mechanics and Arctic Engineering.

    VIVACE is the first known device that could harness energy from most of the water currents around the globe because it works in flows moving slower than 2 knots (about 2 miles per hour.) Most of the Earth's currents are slower than 3 knots. Turbines and water mills need an average of 5 or 6 knots to operate efficiently.

    VIVACE stands for Vortex Induced Vibrations for Aquatic Clean Energy. It doesn't depend on waves, tides, turbines or dams. It's a unique hydrokinetic energy system that relies on "vortex induced vibrations."

    Vortex induced vibrations are undulations that a rounded or cylinder-shaped object makes in a flow of fluid, which can be air or water. The presence of the object puts kinks in the current's speed as it skims by. This causes eddies, or vortices, to form in a pattern on opposite sides of the object. The vortices push and pull the object up and down or left and right, perpendicular to the current.

    These vibrations in wind toppled the Tacoma Narrows bridge in Washington in 1940 and the Ferrybridge power station cooling towers in England in 1965. In water, the vibrations regularly damage docks, oil rigs and coastal buildings.

    "For the past 25 years, engineers---myself included---have been trying to suppress vortex induced vibrations. But now at Michigan we're doing the opposite. We enhance the vibrations and harness this powerful and destructive force in nature," said VIVACE developer Michael Bernitsas, a professor in the U-M Department of Naval Architecture and Marine Engineering.

    Fish have long known how to put the vortices that cause these vibrations to good use.

    "VIVACE copies aspects of fish technology," Bernitsas said. "Fish curve their bodies to glide between the vortices shed by the bodies of the fish in front of them. Their muscle power alone could not propel them through the water at the speed they go, so they ride in each other's wake."

    This generation of Bernitsas' machine looks nothing like a fish, though he says future versions will have the equivalent of a tail and surface roughness a kin to scales. The working prototype in his lab is just one sleek cylinder attached to springs. The cylinder hangs horizontally across the flow of water in a tractor-trailer-sized tank in his marine renewable energy laboratory. The water in the tank flows at 1.5 knots.

    Here's how VIVACE works: The very presence of the cylinder in the current causes alternating vortices to form above and below the cylinder. The vortices push and pull the passive cylinder up and down on its springs, creating mechanical energy. Then, the machine converts the mechanical energy into electricity.

    Just a few cylinders might be enough to power an anchored ship, or a lighthouse, Bernitsas says. These cylinders could be stacked in a short ladder. The professor estimates that array of VIVACE converters the size of a running track and about two stories high could power about 100,000 houses. Such an array could rest on a river bed or it could dangle, suspended in the water. But it would all be under the surface.

    Because the oscillations of VIVACE would be slow, it is theorized that the system would not harm marine life like dams and water turbines can.

    Bernitsas says VIVACE energy would cost about 5.5 cents per kilowatt hour. Wind energy costs 6.9 cents a kilowatt hour. Nuclear costs 4.6, and solar power costs between 16 and 48 cents per kilowatt hour depending on the location.

    "There won't be one solution for the world's energy needs," Bernitsas said. "But if we could harness 0.1 percent of the energy in the ocean, we could support the energy needs of 15 billion people."

    The researchers recently completed a feasibility study that found the device could draw power from the Detroit River. They are working to deploy one for a pilot project there within the 18 months.

    This work has been supported by the U.S. Department of Energy, the Office of Naval Research, the National Science Foundation, the Detroit/Wayne County Port Autrhority, the DTE Energy Foundation, Michigan Universities Commercialization Initiative, and the Link Foundation. The technology is being commercialized through Bernitsas' company, Vortex Hydro Energy.

    The paper is called "VIVACE (Vortex Induced Vibration for Aquatic Clean Energy): A New Concept in Generation of Clean and Renewable Energy from Fluid Flow." Other authors are Naval Architecture and Marine Engineering graduate students Kamaldev Raghavan, Yaron Ben-Simon and Elizabeth M.H. Garcia.

    For more information:

    Michael Bernitsas: http://www.engin.umich.edu/dept/name/faculty_staff/bernitsas/Main.htm

    Vortex Hydro Energy: http://www.vortexhydroenergy.com/

    Michigan Engineering: The University of Michigan College of Engineering is ranked among the top engineering schools in the country. At more than $130 million annually, its engineering research budget is one of largest of any public university. Michigan Engineering is home to 11 academic departments and a National Science Foundation Engineering Research Center. The college plays a leading role in the Michigan Memorial Phoenix Energy Institute and hosts the world class Lurie Nanofabrication Facility. Find out more at http://www.engin.umich.edu/.

    # # # # # #

    Video is available by contacting the source.

    • other-fb
    • other-tw
    X
    X
    X
    • Filters

    • × Clear Filters
    Flowing for Function

    Flowing for Function

    A flowing magnetically responsive liquid seamlessly regulates the shape and properties of solids, letting them perform an array of jobs.

    Science Snapshots: new nitrides, artificial photosynthesis, and TMDC semiconductors

    Science Snapshots: new nitrides, artificial photosynthesis, and TMDC semiconductors

    From Berkeley Lab: groundbreaking study maps out paths to new nitride materials; new framework for artificial photosynthesis; TMDCs don't have to be perfect to shine bright.

    Story Tips from the Department of Energy's Oak Ridge National Laboratory, June 17 2019

    Story Tips from the Department of Energy's Oak Ridge National Laboratory, June 17 2019

    ORNL story tips: New builders' tool by ORNL assesses design performance before construction begins; new pressure technique to manipulate magnetism in thin films could enhance electronic devices; ORNL outlines quantum sensing advances for better airport scanning, other applications.

    Superconducting Films for Particle Acceleration

    Superconducting Films for Particle Acceleration

    Researchers demonstrated record accelerating cavity performance using a technique that could lead to significant cost savings.

    Electron (or 'Hole') Pairs May Survive Effort to Kill Superconductivity

    Electron (or 'Hole') Pairs May Survive Effort to Kill Superconductivity

    Scientists seeking to understand the mechanism underlying superconductivity in "stripe-ordered" cuprates--copper-oxide materials with alternating areas of electric charge and magnetism--discovered an unusual metallic state when attempting to turn superconductivity off. They found that under the conditions of their experiment, even after the material loses its ability to carry electrical current with no energy loss, it retains some conductivity--and possibly the electron (or hole) pairs required for its superconducting superpower.

    Parceling Particle Beams

    Parceling Particle Beams

    Beam chopper cuts accelerator-generated ion beams under highly demanding conditions.

    An Interaction of Slipping Beams

    An Interaction of Slipping Beams

    Successful models of the fraught dynamics of two particle beams in close contact lead to smoother sailing in an area of particle acceleration.

    Hybrid Nanostructure Steps Up Light-Harvesting Efficiency

    Hybrid Nanostructure Steps Up Light-Harvesting Efficiency

    Energy is transferred through the structure in a way that boosts its response to light, showing promise for solar cell applications.

    Pulsed Electron Beams Shed Light on Plastics Production

    Pulsed Electron Beams Shed Light on Plastics Production

    Researchers at Berkeley Lab have developed a pulsed electron beam technique that enables high-resolution imaging of magnesium chloride without damage. This approach could apply to a vast range of beam-sensitive materials, and help to create a path toward sustainable plastics.

    Tracking major sources of energy loss in compact fusion facilities

    Tracking major sources of energy loss in compact fusion facilities

    Analysis of energy loss in low-aspect ratio tokamaks opens a new chapter in the development of predictions of transport in such facilities.


    • Filters

    • × Clear Filters

    Energy Department to Invest $32 Million in Computer Design of Materials

    The U.S. Department of Energy announced that it will invest $32 million over the next four years to accelerate the design of new materials through use of supercomputers.

    Demarteau to head ORNL Physics Division

    Demarteau to head ORNL Physics Division

    The Department of Energy's Oak Ridge National Laboratory has named Marcel Demarteau as Physics Division Director, effective June 17.

    PPPL and Oak Ridge manage new DOE program designed to speed development of fusion energy with private-public partnerships

    PPPL and Oak Ridge manage new DOE program designed to speed development of fusion energy with private-public partnerships

    Feature describes PPPL role in innovative DOE program to promote public-private partnerships to speed development of fusion energy.

    ORNL welcomes seven new research fellows to Innovation Crossroads

    ORNL welcomes seven new research fellows to Innovation Crossroads

    Oak Ridge National Laboratory welcomed seven technology innovators to join the third cohort of Innovation Crossroads, the Southeast's only entrepreneurial research and development program based at a U.S. Department of Energy national laboratory.

    New DOE program connects fusion companies with national labs, taps ORNL to lead

    New DOE program connects fusion companies with national labs, taps ORNL to lead

    The Department of Energy has established the Innovation Network for Fusion Energy program, or INFUSE, to encourage private-public research partnerships for overcoming challenges in fusion energy development.

    Department of Energy Announces $75 Million for High Energy Physics Research

    The U.S. Department of Energy (DOE) announced $75 million in funding for 66 university research awards on a range of topics in high energy physics to advance knowledge of how the universe works at its most fundamental level.

    Ames Laboratory names James Morris Chief Research Officer

    Ames Laboratory names James Morris Chief Research Officer

    Dr. James Morris has been named Chief Research Officer at the Department of Energy's (DOE) Ames Laboratory. His appointment follows an extensive search and will be effective June 17, 2019.

    Four scientists at PPPL awarded national and international honors

    Four scientists at PPPL awarded national and international honors

    Feature profiles four PPPL scientists who have received high honors.

    Brookhaven's Mircea Cotlet Named a Battelle "Inventor of the Year"

    Brookhaven's Mircea Cotlet Named a Battelle "Inventor of the Year"

    The global science and technology organization Battelle recognized materials scientist Mircea Cotlet of Brookhaven Lab's Center for Functional Nanomaterials for his research in applying self-assembly methods to control the interfaces between nanomaterials and other light-interacting components.

    Berkeley Lab Project to Pinpoint Methane 'Super Emitters'

    Berkeley Lab Project to Pinpoint Methane 'Super Emitters'

    Methane, a potent greenhouse gas that traps about 30 times more heat than carbon dioxide, is commonly released from rice fields, dairies, landfills, and oil and gas facilities - all of which are plentiful in California. Now Berkeley Lab has been awarded $6 million by the state to find "super emitters" of methane in an effort to quantify and potentially mitigate methane emissions.


    • Filters

    • × Clear Filters
    Flowing for Function

    Flowing for Function

    A flowing magnetically responsive liquid seamlessly regulates the shape and properties of solids, letting them perform an array of jobs.

    Superconducting Films for Particle Acceleration

    Superconducting Films for Particle Acceleration

    Researchers demonstrated record accelerating cavity performance using a technique that could lead to significant cost savings.

    Parceling Particle Beams

    Parceling Particle Beams

    Beam chopper cuts accelerator-generated ion beams under highly demanding conditions.

    An Interaction of Slipping Beams

    An Interaction of Slipping Beams

    Successful models of the fraught dynamics of two particle beams in close contact lead to smoother sailing in an area of particle acceleration.

    At DOE's Manufacturing Demonstration Facility, science drives next-gen creations

    At DOE's Manufacturing Demonstration Facility, science drives next-gen creations

    American ingenuity is providing radical productivity improvements from advanced materials and robotic systems developed at the Department of Energy's Manufacturing Demonstration Facility at Oak Ridge National Laboratory.

    Computer Simulation Shows Astrophysical Particle Acceleration

    Computer Simulation Shows Astrophysical Particle Acceleration

    Particles act in a way that justifies extrapolating simulation results to astrophysical scales.

    High-Fidelity Multiphysics Simulations to Improve Nuclear Reactor Safety and Economics

    High-Fidelity Multiphysics Simulations to Improve Nuclear Reactor Safety and Economics

    Engineers can model heat distribution in reactor designs with fewer or no approximations.

    Simulations Shed Light on Self-Healing Cement

    Simulations Shed Light on Self-Healing Cement

    A first-of-its-kind computer simulation reveals self-healing cement for geothermal and oil and gas wells performs better than originally thought.

    Solving a Beta Decay Puzzle

    Solving a Beta Decay Puzzle

    Researchers use advanced nuclear models to explain 50-year mystery surrounding the process stars use to transform elements.

    Why Are These Extremely Light Calcium Isotopes So Small?

    Why Are These Extremely Light Calcium Isotopes So Small?

    The radii of three proton-rich calcium isotopes are smaller than previously predicted because models didn't account for two nuclear interactions.


    Spotlight

    ILSAMP Symposium showcases benefits for diverse students, STEM pipeline
    Monday May 20, 2019, 12:05 PM

    ILSAMP Symposium showcases benefits for diverse students, STEM pipeline

    Argonne National Laboratory

    Integrating Scientific Computing into Science Curricula
    Monday May 13, 2019, 11:05 AM

    Integrating Scientific Computing into Science Curricula

    Brookhaven National Laboratory

    Students from Minnesota and Massachusetts Win DOE's 29th National Science Bowl(r)
    Monday April 29, 2019, 02:05 PM

    Students from Minnesota and Massachusetts Win DOE's 29th National Science Bowl(r)

    Department of Energy, Office of Science

    DOE's Science Graduate Student Research Program Selects 70 Students to Pursue Research at DOE Laboratories
    Friday April 12, 2019, 03:05 PM

    DOE's Science Graduate Student Research Program Selects 70 Students to Pursue Research at DOE Laboratories

    Department of Energy, Office of Science

    Young Women's Conference in STEM seeks to change the statistics one girl at a time
    Thursday March 28, 2019, 03:05 PM

    Young Women's Conference in STEM seeks to change the statistics one girl at a time

    Princeton Plasma Physics Laboratory

    Students team with Argonne scientists and engineers to learn about STEM careers
    Tuesday March 12, 2019, 05:05 PM

    Students team with Argonne scientists and engineers to learn about STEM careers

    Argonne National Laboratory

    Lynbrook High wins 2019 SLAC Regional Science Bowl competition
    Wednesday February 13, 2019, 02:05 PM

    Lynbrook High wins 2019 SLAC Regional Science Bowl competition

    SLAC National Accelerator Laboratory

    Equipping the next generation for a technological revolution
    Thursday January 24, 2019, 01:05 PM

    Equipping the next generation for a technological revolution

    Argonne National Laboratory

    Chemistry intern inspired by Argonne's real-world science
    Friday January 18, 2019, 05:05 PM

    Chemistry intern inspired by Argonne's real-world science

    Argonne National Laboratory

    Chasing a supernova
    Friday January 18, 2019, 04:05 PM

    Chasing a supernova

    Argonne National Laboratory

    Argonne intern streamlines the beamline
    Tuesday January 08, 2019, 02:05 PM

    Argonne intern streamlines the beamline

    Argonne National Laboratory

    Research on Light-Matter Interaction Could Lead to Improved Electronic and Optoelectronic Devices
    Thursday October 11, 2018, 04:00 PM

    Research on Light-Matter Interaction Could Lead to Improved Electronic and Optoelectronic Devices

    Rensselaer Polytechnic Institute (RPI)

    Innovating Our Energy Future
    Wednesday October 03, 2018, 07:05 PM

    Innovating Our Energy Future

    Oregon State University, College of Engineering

    Physics graduate student takes her thesis research to a Department of Energy national lab
    Tuesday October 02, 2018, 03:05 PM

    Physics graduate student takes her thesis research to a Department of Energy national lab

    University of Alabama at Birmingham

    Friday September 21, 2018, 01:05 PM

    "Model" students enjoy Argonne campus life

    Argonne National Laboratory

    Writing Code for a More Skilled and Diverse STEM Workforce
    Thursday September 06, 2018, 01:05 PM

    Writing Code for a More Skilled and Diverse STEM Workforce

    Brookhaven National Laboratory

    New graduate student summer school launches at Princeton Plasma Physics Laboratory
    Tuesday September 04, 2018, 11:30 AM

    New graduate student summer school launches at Princeton Plasma Physics Laboratory

    Princeton Plasma Physics Laboratory

    The Gridlock State
    Friday August 31, 2018, 06:05 PM

    The Gridlock State

    California State University (CSU) Chancellor's Office

    Meet Jasmine Hatcher and Trishelle Copeland-Johnson
    Friday August 31, 2018, 02:05 PM

    Meet Jasmine Hatcher and Trishelle Copeland-Johnson

    Brookhaven National Laboratory

    Argonne hosts Modeling, Experimentation and Validation Summer School
    Friday August 24, 2018, 11:05 AM

    Argonne hosts Modeling, Experimentation and Validation Summer School

    Argonne National Laboratory

    Students affected by Hurricane Maria bring their research to SLAC
    Wednesday August 22, 2018, 01:05 PM

    Students affected by Hurricane Maria bring their research to SLAC

    SLAC National Accelerator Laboratory

    Brookhaven Lab Pays Tribute to 2018 Summer Interns
    Wednesday August 22, 2018, 10:05 AM

    Brookhaven Lab Pays Tribute to 2018 Summer Interns

    Brookhaven National Laboratory

    Changing How Buildings Are Made
    Monday August 20, 2018, 12:05 PM

    Changing How Buildings Are Made

    Washington University in St. Louis

    CSUMB Selected to Host Architecture at Zero Competition in 2019
    Thursday August 16, 2018, 12:05 PM

    CSUMB Selected to Host Architecture at Zero Competition in 2019

    California State University, Monterey Bay

    Department of Energy Invests $64 Million in Advanced Nuclear Technology
    Friday July 20, 2018, 03:00 PM

    Department of Energy Invests $64 Million in Advanced Nuclear Technology

    Rensselaer Polytechnic Institute (RPI)

    Professor Miao Yu Named the Priti and Mukesh Chatter '82 Career Development Professor
    Thursday July 19, 2018, 05:00 PM

    Professor Miao Yu Named the Priti and Mukesh Chatter '82 Career Development Professor

    Rensselaer Polytechnic Institute (RPI)

    2018 RHIC & AGS Annual Users' Meeting: 'Illuminating the QCD Landscape'
    Tuesday July 03, 2018, 11:05 AM

    2018 RHIC & AGS Annual Users' Meeting: 'Illuminating the QCD Landscape'

    Brookhaven National Laboratory

    Argonne welcomes <em>The Martian</em> author Andy Weir
    Friday June 29, 2018, 06:05 PM

    Argonne welcomes The Martian author Andy Weir

    Argonne National Laboratory

    Creating STEM Knowledge and Innovations to Solve Global Issues Like Water, Food, and Energy
    Monday June 18, 2018, 09:55 AM

    Creating STEM Knowledge and Innovations to Solve Global Issues Like Water, Food, and Energy

    Illinois Mathematics and Science Academy (IMSA)

    Professor Emily Liu Receives $1.8 Million DoE Award for Solar Power Systems Research
    Friday June 15, 2018, 10:00 AM

    Professor Emily Liu Receives $1.8 Million DoE Award for Solar Power Systems Research

    Rensselaer Polytechnic Institute (RPI)

    Celebrating 40 years of empowerment in science
    Thursday June 07, 2018, 03:05 PM

    Celebrating 40 years of empowerment in science

    Argonne National Laboratory

    Introducing Graduate Students Across the Globe to Photon Science
    Monday May 07, 2018, 10:30 AM

    Introducing Graduate Students Across the Globe to Photon Science

    Brookhaven National Laboratory

    Students from Massachusetts and Washington Win DOE's 28th National Science Bowl(r)
    Wednesday May 02, 2018, 04:05 PM

    Students from Massachusetts and Washington Win DOE's 28th National Science Bowl(r)

    Department of Energy, Office of Science

    The Race for Young Scientific Minds
    Thursday April 12, 2018, 07:05 PM

    The Race for Young Scientific Minds

    Argonne National Laboratory

    Q&A: Al Ashley Reflects on His Efforts to Diversify SLAC and Beyond
    Wednesday March 14, 2018, 02:05 PM

    Q&A: Al Ashley Reflects on His Efforts to Diversify SLAC and Beyond

    SLAC National Accelerator Laboratory

    Insights on Innovation in Energy, Humanitarian Aid Highlight UVA Darden's Net Impact Week
    Thursday February 15, 2018, 12:05 PM

    Insights on Innovation in Energy, Humanitarian Aid Highlight UVA Darden's Net Impact Week

    University of Virginia Darden School of Business

    Ivy League Graduate, Writer and Activist with Dyslexia Visits CSUCI to Reframe the Concept of Learning Disabilities
    Friday February 09, 2018, 11:05 AM

    Ivy League Graduate, Writer and Activist with Dyslexia Visits CSUCI to Reframe the Concept of Learning Disabilities

    California State University, Channel Islands

    Photographer Adam Nadel Selected as Fermilab's New Artist-in-Residence for 2018
    Wednesday January 17, 2018, 12:05 PM

    Photographer Adam Nadel Selected as Fermilab's New Artist-in-Residence for 2018

    Fermi National Accelerator Laboratory (Fermilab)

    Fermilab Computing Partners with Argonne, Local Schools for Hour of Code
    Wednesday January 17, 2018, 12:05 PM

    Fermilab Computing Partners with Argonne, Local Schools for Hour of Code

    Fermi National Accelerator Laboratory (Fermilab)

    Q&A: Sam Webb Teaches X-Ray Science from a Remote Classroom
    Wednesday December 20, 2017, 01:05 PM

    Q&A: Sam Webb Teaches X-Ray Science from a Remote Classroom

    SLAC National Accelerator Laboratory

    The Future of Today's Electric Power Systems
    Monday December 18, 2017, 01:05 PM

    The Future of Today's Electric Power Systems

    Rensselaer Polytechnic Institute (RPI)

    Supporting the Development of Offshore Wind Power Plants
    Monday December 18, 2017, 12:05 PM

    Supporting the Development of Offshore Wind Power Plants

    Rensselaer Polytechnic Institute (RPI)

    Stairway to Science
    Tuesday October 03, 2017, 01:05 PM

    Stairway to Science

    Argonne National Laboratory

    After-School Energy Rush
    Thursday September 28, 2017, 12:05 PM

    After-School Energy Rush

    Argonne National Laboratory

    Bringing Diversity Into Computational Science Through Student Outreach
    Thursday September 28, 2017, 10:05 AM

    Bringing Diversity Into Computational Science Through Student Outreach

    Brookhaven National Laboratory

    From Science to Finance: SLAC Summer Interns Forge New Paths in STEM
    Thursday September 21, 2017, 03:05 PM

    From Science to Finance: SLAC Summer Interns Forge New Paths in STEM

    SLAC National Accelerator Laboratory





    Showing results

    0-4 Of 2215