In addition, containment weight estimates are made for the several composite flywheel designs of interest so that judgements can be made as to the relative weights of their containment structure. This report addresses the factors that shape this structure and define its design criteria. ![]() Optionally, a layer of impedance matching material may be utilized intermediate the flywheel rotor and the inner high toughness layer.Ī composite- flywheel burst- containment studyĪ key component impacting total flywheel energy storage system weight is the containment structure. The flywheel containment, may for example, be composed of an inner high toughness structural layer, and energy absorbing layer, and an outer support layer. ![]() The flywheel containment structure has been experimentally demonstrated to contain carbon fiber fragments with a velocity of 1,000 m/s and has an aerial density of less than 6.5 g/square centimeters. ![]() The various layers of material act as a vacuum barrier, momentum spreader, energy absorber, and reaction plate. ![]() A lightweight flywheel containment composed of a combination of layers of various material which absorb the energy of a flywheel structural failure.
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