Fluidic variable inertia flywheel

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Scopus citations

Abstract

Energy storage is important for many applications from hybrid vehicles to off-peak electric power to rotating machinery. A flywheel offers the combination of high energy density and high power density not attainable with other energy storage medium. In many situations, it is desirable to store energy at a constant angular velocity. This work proposes a novel self-governing fluidic variable inertia flywheel that can maintain a constant angular velocity across a range of energy storage. The fluidic flywheel uses a piston to separate the liquid filled chamber from a chamber vented to atmosphere. A force balance is created on the piston due to the radial pressure gradient of the liquid reacted by a constant force spring. Energy added to the system is stored in equally two forms: increases the kinetic energy of the flywheel at a constant angular velocity and increasing the potential energy of the constant force spring. A design example demonstrates that the fluidic flywheel enables a constant angular velocity with an order of magnitude lower mass moment of inertia than a conventional flywheel. This promising technology enables a simple constant angular velocity energy storage system, yet requires future work in numerous areas.

Original languageEnglish (US)
Title of host publication7th International Energy Conversion Engineering Conference
StatePublished - Dec 1 2009
Event7th International Energy Conversion Engineering Conference - Denver, CO, United States
Duration: Aug 2 2009Aug 5 2009

Publication series

Name7th International Energy Conversion Engineering Conference

Other

Other7th International Energy Conversion Engineering Conference
CountryUnited States
CityDenver, CO
Period8/2/098/5/09

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