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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 18, Issue 4 - Dec 2009
Volume 18, Issue 3 - Sep 2009
Volume 18, Issue 2 - Jun 2009
Volume 18, Issue 1 - Feb 2009
Selecting the target year
Design and Implementation of FEP for Interfacing of Distributed Power Generation
Lee, Sung-Woo ; Ha, Bok-Nam ; Seo, In-Yong ;
Journal of Energy Engineering, volume 18, issue 3, 2009, Pages 147~155
Demand for distributed source by new and renewable energy has been gradually increasing recently. For the characteristics of distributed generation, distributed source is located near the distribution system and customers' buildings and can be operated in standalone mode or in interface mode with distribution system. When the distributed sources are interfaced with distribution system, the standard for interfacing distributed source with existing distribution system and operation manual should be updated with revisions in order to manage the distributed source effectively and operate the distribution system stably because how to operate the interfaced system is different from that of existing distribution system. In this paper, the FEP(Front End Processor) using the international standard protocol IEC-60870 for interfacing with distributed resources was designed. The designed system was verified via the test result using main control system for distributed generation and RTU(Remote Terminal Unit) for interface with distributed power generating.
A Study on Cyclic Variation by Idling in Gasoline Vehicle
Han, Sung-Bin ; Kim, Sung-Mo ;
Journal of Energy Engineering, volume 18, issue 3, 2009, Pages 156~162
Cylinder-pressure based combustion analysis provides a mechanism through which a combustion researcher can understand the combustion process. This paper was to identify the most significant sources of cycle-to-cycle combustion variability in a spark ignition engine at idle. To analyse the cyclic variation in the test engine, the burn parameters are determined on a cycle-to-cycle basis through analysis of the engine pressure data. The burn rate analysis program was used in the analysis of the data. Burn parameters were used to determine the variations in the input parameter-i.e., fuel, air, residual mass, and so on.
A Study on Exhaust Gas Recirculation of Homogeneous Charge Compression Ignition Engine
Han, Sung-Bin ; Kim, Sung-Mo ;
Journal of Energy Engineering, volume 18, issue 3, 2009, Pages 163~168
This paper describes the homogeneous charge compression ignition (HCCI) engine for a new concept. HCCI engines are being considered as a future alternative for diesel and gasoline engines. HCCI engines have the potential for high indicated thermal efficiency under part load and very low NOx emissions. The objective of this paper is to clear the effects of exhaust gas recirculation (EGR) rate on the HCCI. For this purpose, a 4-cylinder, compression ignition engine was converted into a HCCI engine This work has been run with propane and butane fuels at a constant speed.
Effects of the Ultrasonic Energy on the IDI Diesel Engine Performance
Lee, Byoung-Oh ; Kim, Yong-Guk ; Lee, Seung-Jin ;
Journal of Energy Engineering, volume 18, issue 3, 2009, Pages 169~174
In the study, the effect of the ultrasonic energy in transportational diesel fuel on the engine performance and exhaust emission has been investigated for indirect injection diesel engine. It was tested to estimated change of engine performance and exhaust emission characteristics for the transportational diesel fuels and the reforming fuels which was irradiated by the ultrasonic energy. The results of the study may be concluded as follows; By the irradiation of ultrasonic energy on the diesel fuel, cylinder pressure, heat release rate and engine power were increased but bsfc, mass fraction burned, and smoke were reduced. Also, the combustion was more stabilized and became complete and NOx was increased.
A Study on Economic Performance and its Determinants by Value-Chain in Korean Solar Energy Companies
Kim, Dok-Han ; Park, Sung-Hwan ; Park, Jung-Gu ;
Journal of Energy Engineering, volume 18, issue 3, 2009, Pages 175~190
This study examines the influence of scale economy, technology, financing capability and market competition on economic performance by value chain in Korean solar energy companies, using the multiple logistic regression analysis. The current profit ratio is analyzed to have been positively affected by financing capability, while negatively by market competition. The scale economy and technology are analyzed to have no statistical significance on the economic performance. The current profit ratio for companies creating higher value in the sourcing process is negatively affected by technology while positively by financial capability. The one in the manufacturing process is affected positively by technology and financing capability, and the one in the marketing process is affected positively by financing capability while negatively by market competition. The implications of this study are as follows: Korean solar energy industry is recommended i) to establish the specific innovation system for technology development, ii) to set up advanced financial system, iii) to carry out the fractal system, the manufacturing system through the network of the firms owning core competence per value chain.
Assessment of GHG Emission Reduction Potential in Extension of Nuclear and Renewable Energy Electricity Generation
Jun, Soo-Young ; Park, Sang-Won ; Song, Ho-Jun ; Park, Jin-Won ;
Journal of Energy Engineering, volume 18, issue 3, 2009, Pages 191~202
South Korea, ranks 10th largest emitter of carbon dioxide in the world, will probably be under the obligation to reduce GHG emission from 2013. It is very important to reduce the electrical energy consumption since 30% of GHG emission in South Korea is made during electricity generation. In this study, based on "the 1st national energy master plan", the GHG emission reduction potential and the feasibility of the scenario in the electricity generation have been analyzed using LEAP(Long-range Energy Alternative Planning system). The scenario of the mater plan contains the 41% expansion of nuclear power plant facilities and the 11% diffusion of renewable energy until 2030. In result, total
emission reduction rate is 28.8% in 2030. Also
emission of unit electricity generation of bituminous coal power plant is
and its LNG power plant is
in BAU scenario. Therefore when existing facilities is exchanged for nuclear or renewable energy power plant, substitute of bituminous power plant is more effective than LNG power.
Measurement of Vapor Pressure of HFC-404a and Polyol ester Mixture System
Park, Young-Moo ; Kim, Rock-Hyun ;
Journal of Energy Engineering, volume 18, issue 3, 2009, Pages 203~211
Vapor pressure of HFC-404a and polyol ester system were measured at 56 points from 263.15 to 323.15 K and from 0 to 90 mass %polyol ester. It was found that below 273.15 K, the effect of the polyol ester on the vapor pressure was negligible up to 30 mass % polyol ester. The vapor pressure of the system significantly decreased as the mass fraction of polyol ester increased over 50 percent. Raoult's model and Flory-Huggins model were tested for data reduction. Empirical vapor pressure equations were obtained in terms of temperature and mass fraction of polyol ester.