Advances in Energy Engineering

Wavelet Packet Transform based Fault Diagnosis for PEM FC

2017-0

Wavelet Packet Transform based Fault Diagnosis for PEM FC

Pages 1-7
Author Yuan RenZhikun NiHuili XuZhidan ZhongTianyu Lu
Abstract This paper adopts the wavelet packet transform to analysis the water management of the cathode of the Proton Exchange Membrane Fuel Cell (PEM FC). It analysis the wavelet packet transform based fault diagnosis method and gives the diagnosis procedure. Then the paper applies the process to the PEM FC. The wavelet packet transform based fault diagnosis consists of a signal(oxygen stoichiometry) feature extraction by multi scale decomposition and then by calculating the value of the relative wavelet packet energy( ),gets flooding fault identification and classification. This method is low cost and easier to apply to the other dysfunction of the fuel cell systems.

2017-0

Seismic Qualification of a Small Savonius Style Vertical Axis Wind Turbine

Pages 8-11
Author Young-Hyu ChoiSu-Seong YoonJong-Hwan Le
Abstract In this study, the seismic qualification simulation was performed on the proposed small savonius style vertical axis wind turbine by seismic analysis using Finite Element Method. The modal analysis was performed on the wind turbine structure to investigate whether the resonance is caused by the gearbox and turbine blade, and the seismic response spectrum analysis on RRS-SSE 5%, horizontal and vertical seismic loads and the static analysis on dead weight and wind load were performed. Finally, the structural safety was tested by comparing total stress calculated by combining maximum stresses from each analysis using SRSS method and allowable stress of materials.

2017-0

Characteristics of Gearbox Generator for Small-scaled Wind Power Systems

Pages 12-16
Author Sung-Do SongHyun-Dai YangSung-Hoon ParkKyu-Jin LeeJoong-Ho ShinByung-Sun Ki
Abstract The energy is getting more serious along with the economic growth all over the world. For this reason, Korea is greatly interested in energy-independent islands and buildings. But the essential research on small wind power generator for the Micro-grid system used in the energy-independent facilities is still insufficient for now. This thesis shows the power generating characteristics of gearbox generator which improves the characteristics by being a combination of accelerating unit and generator and defines the gearbox generator constant which is the design index of gearbox generator. Through experiment results using simplified wind tunnel, we check the generating characteristics of gearbox generator and propose the optimal designing of accelerating unit and generator using gearbox generator constant the results.

2017-0

Performance of a Stand-alone Wind/Solar Hybrid Power Generation System

Pages 17-21
Author Hyun-Dai YangSung-Hoon ParkKyu-Jin LeeSung-Do SongJoong-Ho Shi
Abstract The purpose of this study is to develop a wind/solar power combined hybrid power generation system and test its power generation performance. As for a wind power generator, an independent type of the power generator with windmill, geared power generator, controller and battery was tested in a wind tunnel. A solar power generator with solar module, controller and battery was tested outside. In addition, a hybrid power generator combined with wind power generator and solar power generator was developed and installed on the beach, and its wind/solar hybrid power generation performance was examined.