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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 9, Issue 4 - Dec 2013
Volume 9, Issue 3 - Sep 2013
Volume 9, Issue 2 - Jun 2013
Volume 9, Issue 1 - Mar 2013
Selecting the target year
A Feasibility Study of Low-Cost Hybrid Fuel-Cell System for Ship Auxiliary Power
Yang, Geun Ryoung ; An, Sang Yong ; Choo, Jin Hoon ;
Journal of the Korean society for New and Renewable Energy, volume 9, issue 4, 2013, Pages 3~12
DOI : 10.7849/ksnre.2013.9.4.003
This paper proposes the hybrid fuel cell system that can solve disadvantages of existing fuel cell system and ensure high reliability and high stability. The system consists of PEM fuel cell, Ni-MH battery and power management system. In this system, when the power provided from the fuel cell is higher than the load power, the extra energy may be used to charge the Ni-MH battery. When the fuel cell can not provide enough energy to the load, the shortage of energy will be supplied by the Ni-MH battery. Experimental results show that the output voltage is regulated well during load variations. Also, high system efficiency is achieved.
Evaluation of Onshore Wind Resource Potential According to the Road Proximity
Kim, Hyun-Goo ; Hwang, Hyo-Jung ; Kang, Yong-Heack ; Yun, Chang-Yeol ;
Journal of the Korean society for New and Renewable Energy, volume 9, issue 4, 2013, Pages 13~18
DOI : 10.7849/ksnre.2013.9.4.013
Wind turbines should generally be installed at a certain distance from a road to ensure passengers' safety. In Korea, there is no clear guidance as the Ministry of Environment first proposed a road setback distance of 400 m in the Onshore Wind Farm Siting Guidelines draft proposed in July 2012, and then modified it to 1.5 times the height of the wind turbine in October of the same year. This study analyzed the dynamic range of onshore wind resource potential according to how the road setback distance is set using the Korea Wind Atlas with 100m spatial resolution made by the Korea Institute of Energy Research, the transportation network of the Ministry of Construction and Transportation, and the forest road network of the Korea Forestry Service. Owing to the geographical characteristics of Korea, where mountainous terrain accounts for 70% of the total territory, the wind resource potential within 1 km from forest roads are estimated to be 14.3 GW, 14% of Korea's total wind resource potential. In addition, the construction distance of new road for transporting wind turbines from the existing road to a wind farm site is estimated as less than 2 km. Given the limited wind resource potential and geographical constraints, an assessment system that can maximize wind resource utilization and ensure road safety at the same time, and which takes into account the regional characteristics instead of applying the fixed road setback distance across-the-road, is required.
Analysis of the Characteristics of the Tidal Current Power Generation System Using Motor-Generator Set
An, Won-Young ; Lim, Hyung-Tack ; Lee, Seok-Hyun ; Kim, Gun-Su ; Jo, Chul-Hee ;
Journal of the Korean society for New and Renewable Energy, volume 9, issue 4, 2013, Pages 19~24
DOI : 10.7849/ksnre.2013.9.4.019
In order to analyze the characteristics of tidal current power generation system, we measured output power in M-G Set (Motor-Generator Set) and MATLAB/Simulink. We installed M-G Set (Motor-Generator Set) and did a simulation using MATLAB/Smulink. The simulation consisted of the tidal current turbine, PMSG, converter, and three-phase PWM inverter. Also, the speed control of the generator was performed using machine side converter. And we measured output voltage, current, power of the generator and the output power of three-phase PWM inverter.
Study on Electrical Linear Generator Containing Heaving Buoy and Its Applications
Cha, Kyungho ; Kim, Jung-Taek ;
Journal of the Korean society for New and Renewable Energy, volume 9, issue 4, 2013, Pages 25~31
DOI : 10.7849/ksnre.2013.9.4.025
This paper describes an electrical linear generator (IntELG) based on permanent magnets, containing heaving buoy, and its applications for the floating wave energy converters riding in parallel waves. The permanent magnets are integrated with the heaving buoy as a component and the integrated component is configured within the cylindrical IntELG to be filled with fluid. Thus, the IntELG can effectively be applied for the power-take-off of the floating wave energy converter riding in parallel waves. Typical applications are exampled with the Pelamis and Anaconda and they are investigated for the diversely redundant power source of nuclear power plant and the cooperation with submerged tunnel(s).
An Investigation on Flow and Structural Characteristics of Heat Exchanger in Rankine Steam Cycle for Co-generation System
Ryu, Kyuhyenn ; Kim, Kusung ; Lee, Younghum ; Kang, Seokho ; Park, Gibeom ;
Journal of the Korean society for New and Renewable Energy, volume 9, issue 4, 2013, Pages 32~39
DOI : 10.7849/ksnre.2013.9.4.032
A 2-loop waste heat recovery system with Rankine steam cycles for the improvement of fuel efficiency of gasoline vehicles has been investigated. A high temperature loop is used to recover waste heat from exhaust gas and a low temperature loop is used to recover waste heat from cold engine coolant. This paper has dealt with a layout of low temperature loop system, the review of the velocity contours through numerical analysis. According to the result of analysis, the designed heat exchanger. And comparing with flow analysis results, LT Boiler is safe to operation.
Potential of Torrified Tulip-tree for the Production of Solid Bio-fuels
Ahn, Byoung Jun ; Yang, In ; Kim, Sang Tae ; Park, Daehak ;
Journal of the Korean society for New and Renewable Energy, volume 9, issue 4, 2013, Pages 40~50
DOI : 10.7849/ksnre.2013.9.4.040
This study was performed to investigate the potential of torrefied tulip tree (TT) for the production of pellets. For this purpose, chemical composition and fuel characteristics of torrefied TT were examined. In addition, pellets were fabricated by using sawdust of torrefied TT chip, and durability of the pellet was measured. Lignin content of torrefied TT was higher than that of non-torrefied TT, and increased with the increases of torrefaction temperature and time. Fuel characteristics of torrefied TT were affected by torrefied conditions, and the characteristics were influenced more by torrefaction temperature than by torrefaction time. Higher heating value (HHV) and ash content (AC) of torrefied tulip tree increased with increasing torrefaction temperature, and the values were much higher than HHV and AC values of non-torrefied TT. Durability of pellets fabricated with
-torrefied TT was higher than that of
-torrefied TT, and the value exceeded the minimum requirement (-97.50%) of the 1st-grade pellet standard designated by Korea Forest Research Institute. Based on the results, torrefaction treatment of
to TT might be a optimal condition for the production of TT pellets considering the mass balance and fuel characteristics of TT as well as the durability of the pellets. Thus, it is confirmed that torrefied TT can be used as a raw material for the production of bio-pellets.