Reduction of mechanical loss of flywheel energy storage system with spherical spiral groove bearing

Suzuki, Toshimitsu; Masuda, Takumi; Itoh, Jun‐ichi; Yamada, Noboru

doi:10.1109/peds.2017.8289187

Cited by 2 publications

(2 citation statements)

References 8 publications

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“…II "Flywheel Energy Storage System with Spherical Spiral Groove Bearing" by J.-I. Itoh and N. Yamada [23]. III "Flywheel energy storage system with a permanent magnet bearing and a pair of hybrid ceramic ball bearings" by S. Jiang, W. Hongchang and S. Wen [24].…”

Section: Motivation and Current State Of The Art 21 Bearing Systems In Currently Available Fessmentioning

confidence: 99%

“…Skinner and Mertiny's paper [22], for instance, focuses on windage losses and a curve-fit model for overall losses, whereas the publication at hand goes into greater detail regarding bearing system design. Suzuki et al [23] investigate and optimize inner bearing geometry to achieve friction loss optimization. In comparison, the publication at hand is based on off-the-shelf bearings and deals with the bearing periphery for optimization purposes.…”

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confidence: 99%

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Design of a Low-Loss, Low-Cost Rolling Element Bearing System for a 5 kWh/100 kW Flywheel Energy Storage System

Haidl¹,

Buchroithner

2021

Energies

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The bearings of a flywheel energy storage system (FESS) are critical machine elements, as they determine several important properties such as self-discharge, service life, maintenance intervals and most importantly cost. This paper describes the design of a low-cost, low-loss bearing system for a 5 kWh/100 kW FESS based on analytical, numerical and experimental methods. The special operating conditions of the FESS rotor (e.g., high rotational speeds, high rotor mass, vacuum) do not allow isolated consideration of the bearings alone, but require a systematic approach, taking into account aspects of rotor dynamics, thermal management, bearing loads and lubrication. The proposed design incorporates measures to mitigate both axial and radial bearing loads, by deploying resilient bearing seats and a lifting magnet for rotor weight compensation. As a consequence of minimized external loading, bearing kinematics also need to be considered during the design process. A generally valid, well-structured guideline for the design of such low-loss rolling bearing systems is presented and applied to the 5 kWh/100 kW FESS use case.

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Section: Motivation and Current State Of The Art 21 Bearing Systems In Currently Available Fessmentioning

confidence: 99%

mentioning

confidence: 99%