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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Journal of Energy Engineering
Journal Basic Information
Journal DOI :
The Korea Society for Energy Engineering
Editor in Chief :
Volume & Issues
Volume 19, Issue 4 - Dec 2010
Volume 19, Issue 3 - Sep 2010
Volume 19, Issue 2 - Jun 2010
Volume 19, Issue 1 - Mar 2010
Selecting the target year
An Experimental Suggestion on the Transformation of Korean Energy Policies
Park, Jung-Gu ;
Journal of Energy Engineering, volume 19, issue 1, 2010, Pages 1~7
This experimental study suggests some alternatives for stable growth and environmental conservation, responding to the unstability of global energy market and the regulations to greenhouse gas reduction. It introduces the energy-chain approach optimizing the whole processes extending energy production, transfer, and exploitation. And the alternatives are covered from low-carbon & environment-friendly energy-specific innovation system, transformation of major industries to low-carbon & environment-friendly industries, upgrading of energy efficiency, procurement of energy sources to policy cluster.
An Evaluation of Energy Quality for Distributed Powersystem
Hur, Kwang-Beom ; Park, Jung-Keuk ; Yoon, Gi-Gab ; Rhim, Sang-Kyu ; Choi, In-Kyu ;
Journal of Energy Engineering, volume 19, issue 1, 2010, Pages 8~15
As environmental friendly energy system, distributed micro gasturbine is focused on new energy source for overcoming brand new construction area of power generation. This distributed micro gasturbine system has the powerful characteristics as belows; 1) environmental friendly features NOx < 9 ppm, noise < 65 db 2) various fuel flexbility which is used such as natural gas, diesel, low calory new & renewable fuel, kerosene. 3) high specific output power based on small area and is avilable for very easy and compact installation. There are many new installation sites in USA and Japan from 1998. On the other hand the exhisting large power system was constructued by the sea side, this compact power system is now installed by enduser in downtown area and supplying combined heat & power, has the various apllication on-site power generation. In recently, there is the very important issue for new & reliablbe energy development and spreading out. This paper represent as belows for important system characteristics; 1) grid connection modeling 2) system operation characteristics 3) on-site operation result and evaluation output of power quality analysis.
Synthesis and Characterization of Tin-Pyrolyzed Carbon Composites as Anode Material for Lithium Ion Secondary Batteries
Hwang, Yun-Ju ; Park, Sang-Ho ; Kim, Ae-Rhan ; Jisha, M.R. ; Christy, Maria ; Suh, Eun-Kyung ; Nahm, Kee-Suk ;
Journal of Energy Engineering, volume 19, issue 1, 2010, Pages 16~20
In present work, tin-carbon mixtures by using carbon from pyrolyzed coffee seeds were synthesized. Synthesis methods includes simple mixing and chemical mixing. X-ray diffraction pattern indicated carbon and tin mixture peaks and scanning electron microscope images showed particles size of
and shape. Charge discharge test were carried out. Tin-carbon mixture by chemical mixing indicated higher discharge capacity of 191 mAh/g than commercial carbon black(105 mAh/g) for 15cycles. Tin-carbon mixture by simple mixing indicated similar performance to carbon black.
Electrochemical Growth of Palladium Nanowire for Highly Sensitive Hydrogen Sensor
Jo, S.Y. ; Kang, B.R. ; Im, Y.H. ;
Journal of Energy Engineering, volume 19, issue 1, 2010, Pages 21~24
We present a novel electrochemical method to fabricate a single Pd nanowire based on direct current assisted dielectropheresis (DEP) process between two predefined metal electrodes. The electrochemical methods was investigated as functions of frequency and voltage for optimal growth conditions of Pd nanowire. The synthesized Pd nanowire have a good resistance of
, diameters of several hundred nanometers on average and lengths of
. Finally, the single Pd nanowire was capable of detecting hydrogen in the concentration range from 100 to 2500 ppm with high sensitivity and response time, thus demonstrating its suitability for use as a hydrogen sensor.
A Study on Characteristics of the SI Engine Using Methanol Reformulated Fuels
Lee, Suk-Young ; Jeon, Chung-Hwan ;
Journal of Energy Engineering, volume 19, issue 1, 2010, Pages 25~31
In this experimental research, it was studied to compare with pure gasoline and the fuels of RM50 (reformulated methanol fuel) for performance and exhaust emissions without reconstruction of engine systems. RM50 has a wider range of combustion limitation, which is one of the methanol's characteristics. This causes a stable driving state of RM50 in the experimental condition of unstable state and a low cycle by cycle variation which is used to determine the driving state. It is determined that fuel stability is better because cycle by cycle variation varies within 10%, therefore, driving characteristics is relatively good. In all conditions, RM50 has lower exhaust emissions of CO, HC, NOx than gasoline fuel, however, RM50's noise characteristics are 0.5~2dB higher at all condition, and in the result of the experiments of rubber fusion, it increases the utility possibility of RM50.
Effects of the Intake Valve Timing and the Injection Timing for a Miller Cycle Engine
Han, Sung-Bin ; Chang, Yong-Hoon ; Choi, Gyeung-Ho ; Chung, Yon-Jong ; Poompipatpong, Chedthawut ; Koetniyom, Saiprasit ;
Journal of Energy Engineering, volume 19, issue 1, 2010, Pages 32~38
The objective of the research was to study the effects a Miller cycle. The engine was dedicated to natural gas usage by modifying pistons, fuel system and ignition systems. The engine was installed on a dynamometer and attached with various sensors and controllers. Intake valve timing, engine speed, load, injection timing and ignition timing are main parameters. Miller Cycle without supercharging can increase brake thermal efficiency 1.08% and reduce brake specific fuel consumption 4.58%. The injection timing must be synchronous with valve timing, speed and load to control the performances, emissions and knock margin. Throughout these tested speeds, original camshaft is recommended to obtain high volumetric efficiency.
HEV: A Review
Nah, Do-Baek ; Shin, Hyo-Soon ;
Journal of Energy Engineering, volume 19, issue 1, 2010, Pages 39~50
Hybrid Electric Vehicle(HEV) and Plug-in Hybrid Electric Vehicle(PHEV) will replace Conventional Gasolene Engine Vehicle at a rapid rate to eliminate emission gases and improve fuel economy. This review describes Fuzzy Logic Control strategy and Optimization for Parallel Hybrid Electric Vehicle. Recent progress on Electric Motor and Li-ion Battery for HEV and PHEV are given. Analysis on competitiveness of Korean HEV and PHEV technology based on the number of papers published and patents registered are also performed.
A Six Sigma Activity for Saving Electrical Energy in a University Campus
Choi, Seoung-Hoon ; Yu, Jae-Pil ;
Journal of Energy Engineering, volume 19, issue 1, 2010, Pages 51~56
Due to increase in oil price unstableness and earth warming, energy saving has been one of the most important global issues. We report a 6 sigma project that was carried out to save electrical energy in a university campus. DMAIC, the five-phase process of 6 sigma, was applied for the energy saving campaign. This paper proposes a simple method to quantify the sigma level of the electrical energy saving status and various activities to change the consciousness of all the university members. Results were very satisfied. The 6 sigma project saved about 10% of the total electrical consumption. This is approximately 50 million won a year. The success of the 6 sigma project served as a momentum to promote "Green Scholarship" that has become the center of public interest. Also, we have valuable experiences in the 6 sigma training that shows the university campus can be successfully used as a good place for the actual 6 sigma training.