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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
A Study on a Design of Bipolar Plate for PEMFC System
Yoon, Hyung-Sang ; Cha, In-Su ; Lee, Jeong-Il ; Yoon, Jeong-Phil ;
Journal of the Korean society for New and Renewable Energy, volume 4, issue 1, 2008, Pages 5~10
Hydrogen fuel cell is clean and efficient technology along with high energy densities. While there are many different types of fuel cells, the proton exchange membrane fuel cell stands out as one of the most promising for transportation and small stationary applications. This paper focuses on design of bipolar plate for proton exchange membrane fuel cell. The bipolar plate model is realistically and accurately simulated velocity distribution, current density distribution and its effect on the PEMFC system using CFD tool FLUENT.
Preparation of Co-Ni Electrode by Precipitation Method and it's Application for Molten Carbonate Fuel Cell or Optimization of Co-Ni Electrode's Fabrication and it's Application for Molten Carbonate Fuel Cell
Kim, S.Y. ; Devianto, Hary ; Ryu, B.H. ; Hahm, H.C. ; Han, J. ; Yoon, S.P. ; Nam, S.W. ; Lim, T.H. ; Lee, H.I. ;
Journal of the Korean society for New and Renewable Energy, volume 4, issue 1, 2008, Pages 11~18
In-situ lithiated NiO has been manufactured as a conventional cathode material of molten carbonate fuel cell (MCFC), however this material has a weakness for commercialization of MCFC because NiO is spontaneously dissolved into the electrolyte under MCFC operating conditions, resulting in short circuit between cathode and anode. In this research, therefore,
-coated Ni powder was prepared by precipitation method with controlling pH at low temperature and atmospheric pressure. Modified cathode was fabricated by a conventional tape casting method and sintered at 700
atmosphere, Based on characterization result, Pore size distribution and porosity was suitable for the cathode of MCFC. According to the result of dissolution, Ni solubility of modified cathode was 33% lower than that of conventional cathode. In addition, modified electrode showed a good performance from the single cell operation.
A Fuzzy AHP Approach to Prioritize the Energy Technology Development Strategy and Policy
Lee, Seong-Kon ; Mogi, Gento ; Kim, Jong-Wook ;
Journal of the Korean society for New and Renewable Energy, volume 4, issue 1, 2008, Pages 19~24
Energy environment has been changing rapidly such as high oil prices and the effectuation of UNFCCC. Oil prices have continued to rise and Dubai crude prices recorded about 90 dollars per barrel in 2007. In addition, the effectuation of UNFCCC will affect Korean economy and national energy security. Korea is the 9th
emissions country and takes the 1st place related to the increase rate of
emissions globally. Energy technology development is a key breakthrough and one of the optimal alternatives to cope with national energy security. In this study, we prioritize energy technologies in the sectors of high oil prices and UNFCCC related to ETRM for well focus R&D and efficiency of finite resources allocations. We applied to the extended method of AHP, fuzzy AHP reflecting the fuzziness of human thoughts and perception, for prioritizing the relative importance among energy technologies in ETRM for the first time as we make an energy policy in Korea.
Selecting Strategic Energy Technology R&D Programs Applied to the AHP Approach as Planning a Big-sized Energy R&D Program
Lee, Seong-Kon ; Mogi, Gento ; Kim, Jong-Wook ;
Journal of the Korean society for New and Renewable Energy, volume 4, issue 1, 2008, Pages 25~30
The R&D budget of energy technology development has increased in the sector of korean energy technology development continuously. In addition to that, KIER, the government invested research institute and unique energy technology R&D research institute, is trying to plan for a big-sized energy R&D program for the well focused R&D and excellent research outcomes. In the phase of R&D process, the planning is one of the most important sectors because it drives the direction of R&D. In this study, we suggest the assessment criteria to select a strategic energy technology R&D programs by the analytic hierarchy process, which is one of multi-criteria decision making method (MCDM)We structure 2 tiers of hierarchy for assessing a big-sized R&D program and also establish 6 criteria in the level 1, which are energy environment, economic spin-off, technical spin-off, marketability, KIER mission, and cost. We allocate the relative weights of criteria by checking the values of consistency ratio as making pairwise comparisons. The result of this research will provide the decision makers as they select a right well focused R&D program.
HVOF Thermal Sprayed AISI316-WC Coating Layer on Stainless Steel for PEMFC Bipolar Plate
Nam, Dae-Geun ;
Journal of the Korean society for New and Renewable Energy, volume 4, issue 1, 2008, Pages 31~36
Stainless steels have been widely considered as metallic bipolar plates, due to their passive surface film, which is good for corrosion resistance. However, the high resistivity of the passive film increases interfacial contact resistance between the bipolar plates and the electrodes. Stainless steels thermal spray coated with a mixture of tungsten carbide and stainless steel powders showed that the coated layer safely combined with the matrix but they suffered many internal defects including voids and cracks. Many cracks were formed in the coated layer and the interface of the matrix and the coated layer during the rolling process. The coated and rolled stainless steels showed lower interfacial contact resistance and corrosion resistance than bare stainless steel because of low resistivity of tungsten carbide and numerous defects, which caused crevice corrosion, in the coated layer.
Test Evaluation of Pretreatment System Material for Bio-gas Micro Gas Turbine Power Generation
Hur, Kwang-Beom ; Park, Jung-Keuk ; Rhim, Sang-Gyu ; Kim, Jae-Hoon ;
Journal of the Korean society for New and Renewable Energy, volume 4, issue 1, 2008, Pages 37~43
As the distributed generation becomes more reliable and economically feasible, it is expected that a higher application of the distributed generation units would be interconnected to the existing grids. This paper describes the results for the mechanical and environmental tests of pretreatment system material. Mechanical Characteristics make differences between parent / weldment, Notch existence / non-existence and air/
conditions. As a result, the life of pipe lines needs to maintain and fit for the operating period. Based on actual situations, the tension test of pipe welding-parts is carried out varying the exposure time of hydrogen sulfide and the fatigue resistance test is also performed inserting a notch into the pipe welding part, being exposed to the hydrogen sulfide environment for 720 hours.