Since FESS is a highly inter-disciplinary subject, this paper gives insights such as the choice of flywheel materials, bearing technologies, and the implications for the overall design and performance. For the application survey, we focusApr 6, 2023 · The 100 kilowatt (kW) and 200kW flywheel energy storage devices developed by Sinomach-HE are industry leaders in China. Energy in. Flywheel energy storage systems are considered to be an attractive alternative to electrochemical batteries due to higher stored energy density, higher life term, deterministic state of charge and ecological operation. Result? 18% reduction in diesel generator use during night shifts at Port Sultan Qaboos. They add flexibility into the electrical system.