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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Journal of the Korean society for New and Renewable Energy
Journal Basic Information
Journal DOI :
The Korean Society for New and Renewable Energy
Editor in Chief :
Volume & Issues
Volume 4, Issue 4 - Dec 2008
Volume 4, Issue 3 - Sep 2008
Volume 4, Issue 2 - Jun 2008
Volume 4, Issue 1 - Mar 2008
Selecting the target year
Technology Trends of Fuel Cell Power Plant Based on Biogas Fuel
Lee, Jong-Gyu ; Jeon, Jae-Ho ; Lee, Jong-Yeon ;
Journal of the Korean society for New and Renewable Energy, volume 4, issue 3, 2008, Pages 5~14
The target for the reduction of
emissions, as specified in the Kyoto Protocol, can only be achieved by an extended use of renewable fuels and the increasing of the energy efficiency. The energy generation from waste gases with a reasonable content of methane like biogas can significantly contribute to reach this target. A further reduction of greenhouse gas emissions is possible by increasing the electrical efficiency using progressive technologies. Fuel cells can be highly energy conversion devices. Utilizing biogas as the fuel for fuel cell systems offers an option that is technically feasible, potentially economically attractive and greenhouse gas neutral. High temperature fuel cells that are able to operate with carbon monoxide in the feed are well suited to these applications. Furthermore, because they do not require noble metal catalysts, the cost of high-temperature fuel cells has the greatest potential to become competitive in the near future compared to other types of fuel cells.
The Variations of Performance Parameters for Small Scale Hydro Power Plant with Rainfall Condition
Park, Wan-Soon ; Lee, Chul-Hyung ;
Journal of the Korean society for New and Renewable Energy, volume 4, issue 3, 2008, Pages 15~22
The effects of design parameters for small scale hydro power (SSHP) plants due to rainfall condition have been studied. The model to predict hydrologic performance for SSHP plants is used in this study. The results from analysis for rainfall conditions based on Weibull distribution show that the capacity and load factor of SSHP site had large difference between the variation of shape and scale parameter. Especially, the hydrologic performance of SSHP site due to variation of shape parameter varied more sensitive than the case of variation of scale parameter. And also, the methodology represented in this study can be used to decide the primary design specifications of SSHP sites.
Study on the Performance of Fuel Cell Driven Compound Source Heat Pump System to a Large Community Building
Jeong, Dong-Hwa ; Byun, Jae-Ki ; Choi, Young-Don ; Cho, Sung-Hwan ;
Journal of the Korean society for New and Renewable Energy, volume 4, issue 3, 2008, Pages 23~35
In the present study, performances of fuel cell driven compound source hybrid heat pump system applied to a large community building are simulated. Among several renewable energy sources, ground, river, sea, and waste water sources are chosen as available alternative energies. The performance and energy cost are varied with the hybrid heat pump sources. The system design and operation process appropriate for the surrounding circumstance guarantee the high benefit of the heat pump system applied to a large community building. Th system is driven by fuel cell system instead of the late-night electricity due to the advantages of the low energy cost and waste heat with high temperature.
A Study on the Mathematical Modelling of Cuban-8 Type Horizontal Axis Wind Turbine
Hwang, Chang-Su ; Cho, Hwan-Kee ; Chung, Hyung-Suk ;
Journal of the Korean society for New and Renewable Energy, volume 4, issue 3, 2008, Pages 36~44
This paper discusses about the mathematical modelling of a new conceptual shape of horizontal axis wind turbine. The geometrical characteristic of wind turbine is studied for the variation of azimuthal angles and elevation angles. The projecting trajectories of Cuban-8 blade due to rotation are analyzed on the each plane in the Cartesian coordinate system. Trajectories show several interesting graphical patterns since the geometrical shape is complicated with the rotational motion of two twisted circumferential blades with elevation angles.
Structural Analysis and Proof Test of Composite Rotor Blades for Wind Turbine
Park, Sun-Ho ; Han, Kyung-Seop ;
Journal of the Korean society for New and Renewable Energy, volume 4, issue 3, 2008, Pages 45~50
GFRP based composite rotor blades were developed for 750 kW & 2 MW wind turbines. The blade sectional geometry was designed to have a general shell-spar and shear web structure. For verifying the structural safety under all relevant extreme loads specified in the GL guidelines, the structural analysis of the rotor blades was performed using commercial FEM codes. The static load carrying capacity, blade tip deflections and natural frequencies were evaluated to satisfy the strength and stability requirements. Full-scale proof tests of rotor blades were carried out with optical fiber sensors for real-time condition monitoring. Finally, the prototype of each rotor blade passed all proof tests for GL certification.
Development of Type3 Composite Cylinder for Fuel Cell Vehicle
Park, Ji-Sang ; Cheung, Sang-Su ; Chung, Jae-Han ; Cho, Sung-Min ; Kim, Tae-Wook ;
Journal of the Korean society for New and Renewable Energy, volume 4, issue 3, 2008, Pages 51~57
The objective of this study is to develop and validate a compressed hydrogen storage system for fuel cell vehicles. The type3 composite cylinder consists of full wrapped composites on a seamless aluminum liner. The key technologies, including design, analysis, and optimized fabrication process for 350bar composite cylinder, were established and verified, and the facilities for fabrication and validation testing have been constructed. Prototype cylinders were fabricated and validated through burst test and ambient cycling test in accordance with international standard.