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

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...

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Autores principales:	Peter Haidl, Armin Buchroithner
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	flywheel energy storage rolling element bearings rotor dynamics lifting magnet bearing design Technology T
Acceso en línea:	https://doaj.org/article/688d1ae2fd414eea9779e28c0217d79a
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id	oai:doaj.org-article:688d1ae2fd414eea9779e28c0217d79a
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spelling	oai:doaj.org-article:688d1ae2fd414eea9779e28c0217d79a2021-11-11T15:57:57ZDesign of a Low-Loss, Low-Cost Rolling Element Bearing System for a 5 kWh/100 kW Flywheel Energy Storage System10.3390/en142171951996-1073https://doaj.org/article/688d1ae2fd414eea9779e28c0217d79a2021-11-01T00:00:00Zhttps://www.mdpi.com/1996-1073/14/21/7195https://doaj.org/toc/1996-1073The 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.Peter HaidlArmin BuchroithnerMDPI AGarticleflywheel energy storagerolling element bearingsrotor dynamicslifting magnetbearing designTechnologyTENEnergies, Vol 14, Iss 7195, p 7195 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	flywheel energy storage rolling element bearings rotor dynamics lifting magnet bearing design Technology T
spellingShingle	flywheel energy storage rolling element bearings rotor dynamics lifting magnet bearing design Technology T Peter Haidl Armin Buchroithner Design of a Low-Loss, Low-Cost Rolling Element Bearing System for a 5 kWh/100 kW Flywheel Energy Storage System
description	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.
format	article
author	Peter Haidl Armin Buchroithner
author_facet	Peter Haidl Armin Buchroithner
author_sort	Peter Haidl
title	Design of a Low-Loss, Low-Cost Rolling Element Bearing System for a 5 kWh/100 kW Flywheel Energy Storage System
title_short	Design of a Low-Loss, Low-Cost Rolling Element Bearing System for a 5 kWh/100 kW Flywheel Energy Storage System
title_full	Design of a Low-Loss, Low-Cost Rolling Element Bearing System for a 5 kWh/100 kW Flywheel Energy Storage System
title_fullStr	Design of a Low-Loss, Low-Cost Rolling Element Bearing System for a 5 kWh/100 kW Flywheel Energy Storage System
title_full_unstemmed	Design of a Low-Loss, Low-Cost Rolling Element Bearing System for a 5 kWh/100 kW Flywheel Energy Storage System
title_sort	design of a low-loss, low-cost rolling element bearing system for a 5 kwh/100 kw flywheel energy storage system
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/688d1ae2fd414eea9779e28c0217d79a
work_keys_str_mv	AT peterhaidl designofalowlosslowcostrollingelementbearingsystemfora5kwh100kwflywheelenergystoragesystem AT arminbuchroithner designofalowlosslowcostrollingelementbearingsystemfora5kwh100kwflywheelenergystoragesystem
_version_	1718432418369634304

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

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