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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of Energy Engineering
Journal Basic Information
Journal DOI :
The Korea Society for Energy Engineering
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Volume & Issues
Volume 21, Issue 4 - Dec 2012
Volume 21, Issue 3 - Sep 2012
Volume 21, Issue 2 - Jun 2012
Volume 21, Issue 1 - Mar 2012
Selecting the target year
Aging of Korean Nuclear Manpower and Implications of Manpower Policy: Statistical Analysis on Nuclear Organizations
Chung, Bum-Jin ; Ko, Kyung-Min ;
Journal of Energy Engineering, volume 21, issue 1, 2012, Pages 1~17
DOI : 10.5855/ENERGY.2012.21.1.001
In Korea, there are increasing concerns on nuclear manpower demand and supply due to construction of domestic nuclear power plants and exporting nuclear power plant. In addition, aging of nuclear manpower is another important concern for stable nuclear manpower demand and supply. A shortage of skilled high-quality human resources resulted in massive retirements of senior workers may seriously undermine Korean nuclear competitiveness. This paper analyzed current state of aging of nuclear manpower based on statistical analysis on Korean nuclear organizations. The data used in this paper is manpower statistics of domestic nuclear organizations surveyed in 2001 and 2010. This paper analyzed trends of manpower change for 10 years and based on these analyses, has reviewed the level of the aging nuclear manpower by surveyed organization and integrated. Finally, this paper suggested to direction of manpower recruitment to cope with aging nuclear manpower and alternatives to find a solution to problems of nuclear manpower demand and supply.
Influence of the Entrance and Exit Lengths on the Natural Convection Heat Transfer of a Cylinder in a Duct
Lim, Chul-Kyu ; Chung, Bum-Jin ;
Journal of Energy Engineering, volume 21, issue 1, 2012, Pages 18~25
DOI : 10.5855/ENERGY.2012.21.1.018
This work investigated the influence of the chimney dimensions(exit and entrance length, and diameter) on the heat transfer of a vertical cylinder in a duct. The measured mass transfer rates for the natural convection of vertical cylinder in a duct were presented for Prandlt number 2,094, Rayleigh number in the range of
. Experiments were performed using a copper sulfate electroplating system to simulate heat transfer based upon the analogy concept. The diameter of the duct was varied from 0.06 m to 0.14 m, and the heights from 0.30 m to 1.10 m. Nusselt numbers measured at open channel condition agreed well with the existing laminar heat transfer correlations for vertical plate developed by Le Fevre. The increase of the exit length enhanced the heat transfer up to a certain duct height but further increase does not affects the heat transfer. The heat transfer decreased with increasing the entrance length up to a certain duct height and was constant at further increase. The Nusselt number decreased with increasing the diameter of duct, until Nusselt number becomes similar to that at open channel beyond a certain diameter.
The Study on Thermal Shock Test Characteristics of Solar Cell for Long-term Reliability Test
Kang, Min-Soo ; Kim, Do-Seok ; Jeon, Yu-Jae ; Shin, Young-Eui ;
Journal of Energy Engineering, volume 21, issue 1, 2012, Pages 26~32
DOI : 10.5855/ENERGY.2012.21.1.026
This study has been performed Thermal Shock test for analyze the cause of Power drop in PV(Photovoltaic) Module. Thermal Shock test condition was performed with temperature range from
. One cycle time is 30min. which are consist of low and high temperature 15min. each other. The test was performed with total 500cycles. EL, I-V were conducted every 100cycle up to 500cycles. Mono Cell resulted in 8% Power drop rates in Bare Cell and 9% in Solar Cell. In the case of Multi Cell resulted in 6% Power drop rates in Bare Cell and 13% in Solar Cell. After Thermal Shock test, Solar Cell's Power drop resulted from surface damages, but in the case of Bare Cell's Power drop had no surface damages. Therefore, Bare Cell's Power drop was confirmed as according to leakage current increase by analysis of Fill Factor after Thermal Shock test. Also, Solar Cell's Power drop rates are higher than that of Bare Cell because of surface damages and consuming electric power increase. From now on, it should be considered that analyzed the reasons of Fill Factor decrease and irregular Power drop in PV module and Cell level using cross section, various conditions and test methods.
A Long Term Market Forecasting of Passenger Car using MESSAGE Modelling
Yoo, Jong-Hun ; Kim, Hu-Gon ;
Journal of Energy Engineering, volume 21, issue 1, 2012, Pages 33~42
DOI : 10.5855/ENERGY.2012.21.1.033
In this study, long-term greenhouse gas reductions expected passenger sector was used for the MESSAGE. Green Car road map proposed BAU scenario, Enhanced diffusion green car scenario, and price 1, 2 scenarios was configured with four scenarios. Enhanced diffusion green car in the scenario, in 2050 compared to BAU scenario 13% of the emissions will decrease. Price 1 and Price 2 scenario is emissions reduction of 14% compared to BAU. This study consists of six chapters. Introduction of MESSAGE, creation and RES in the year and the target year set a different base line and the passenger building materials sector activities, steps for passenger sector scenario and Based on the results of running the emissions reductions were to describe.
Fluidized Bed Drying Effect on the Aerogel Powder Synthesis
Hong, Seong-Hoon ; Lee, Dong-Kyu ; Oh, Chang-Sup ; Kim, Yong-Ha ;
Journal of Energy Engineering, volume 21, issue 1, 2012, Pages 43~46
DOI : 10.5855/ENERGY.2011.21.1.043
A fluidized bed drying approach was utilized to the synthesis of water glass based silica aerogel powders. The effects of the fluidized bed drying conditions such as the superficial velocity and temperature of hot air and bead size as well as bead/wet-gel ratio, on the physical properties such as tapping density and productivity of the aerogel powders were systematically investigated. The experimental results showed that the amount of beads mixed with wet-gels in the fluidized bed column has the most profound impact on the fluidization efficiency, greatly enhancing the yield of the aerogel powders up to 98% with a proper bead/wet-gel weight ratio as compared to 72% without using beads. No significant change was observed in the tapping density over a wide range of the fluidized drying condition. Consequently the fluidized bed drying approach shows a good promise as an alternative route for the large-scale production of the aerogel powders.
The Economic Effects of Integrated-Energy Business : An Input-Output Analysis
Han, Kun-Taik ; Kim, Hye-Min ; Yoo, Seung-Hoon ;
Journal of Energy Engineering, volume 21, issue 1, 2012, Pages 47~54
DOI : 10.5855/ENERGY.2012.21.1.047
Korean government has initiated integrated-energy business (IEB) in Mokdong for energy conservation in 1983. Since then, IEB has been steadily expanding. This paper attempts to apply input-output(I-O) analysis to examine the economic effects of IEB. A static I-O framework is employed, focusing on three topics in its application: the impact of the investment of IEB on the production of other sectors and the inter-industry linkage effect; supply shortage effects of the IEB ; and the impact of the rise in IEB rate on prices of other products. The paper pays closer attention to IEB sector by taking the sector as exogenous and then investigating its economic impacts. The results can be widely utilized in decision-making about IEB policy.
Well Data Interpretation using Software Developed for Estimation of Petrophysical Properties in Gas Hydrate Bearing Sediments in Ulleung Basin, Offshore Korea
Seo, Kwang-Won ; Lim, Jong-Se ;
Journal of Energy Engineering, volume 21, issue 1, 2012, Pages 55~67
DOI : 10.5855/ENERGY.2012.21.1.055
For the development of gas hydrate as new future energy resources, the drilling was carried out at the five locations where have high potential as gas hydrate bearing sediments in Ulleung basin, offshore Korea in 2007. Well log data were obtained from all wells and core data were procured from 3 wells, UBGH1-04, UBGH1-09 and UBGH1-10. In this study, user-friendly software, "KMU GH Logs 2010", is developed and this software is based on the estimation methods developed in previous study for gas hydrate bearing sediments and the properties estimated from UBGH1-04, UBGH1-09 and UBGH1-10. Petrophysical properties in un-cored wells, UBGH1-01 and UBGH1-14, are also estimated by using well log data. Porosity is estimated by density log and gas hydrate saturation is calculated by sonic log and resistivity log. Sedimentary facies are estimated by applying the linear discriminant analysis using both well log and sedimentary facies data from core analysis. It is confirmed that DITM facies and MSS facies appeared signs of gas hydrate disassociation are able to be distinguished by the method.
Characteristics of Unburned Material Derived from Coal-fired Power Plant Burning Low Grade Coal
Park, Ho-Young ; Kim, Young-Ju ; Kim, Tae-Hyung ; Baek, Se-Hyun ; Kim, Kyung-Soo ; Jeoung, Kwon-Dal ;
Journal of Energy Engineering, volume 21, issue 1, 2012, Pages 68~74
DOI : 10.5855/ENERGY.2012.21.1.068
Sub-bituminous coals have been used increasingly in coal-fired power plants with a proportion of over 50% in the blend with bituminous coals. As a result, the unburned material in fly ash has increased and is causing problems in utilizing the fly ash as an additive for concrete production. In this study, analysis of fly ash obtained from a 500 MWe power plant was carried out and unburned material in the fly ash found to be soot. The coals used in the plant were analyzed with CPD model to investigate the sooting potential depending on the coal type and blending ratio.
Optimized Flooding Analysis Method for Compartment for Nuclear Power Plant
Song, Dong-Soo ; Kim, Sang-Yeol ;
Journal of Energy Engineering, volume 21, issue 1, 2012, Pages 75~80
DOI : 10.5855/ENERGY.2012.21.1.075
In this paper a realistic bounding method for flooding analysis following rupture of large size of thanks and piping is defined. Mass and energy release during main feedwater line break accident is analyzed with RETRAN code. It is modeled that the main feed water control valve is closed in 5.0 seconds after reactor trip. In result of the analysis, largest mass and energy is discharged at 70% reactor power. The flood sources for main feedwater room are calculated when piping failure occurs in the high energy line and medium energy line. Based on the result of flood level (1.43m), it is investigated that all of the safety-related environmental qualification equipments are well located above the flood level.
The Economic Value of Residential Electricity Consumption in Seoul
Yoo, Seung-Hoon ; Lee, Seung-Ryul ;
Journal of Energy Engineering, volume 21, issue 1, 2012, Pages 81~85
DOI : 10.5855/ENERGY.2012.21.1.081
Electricity is the basic building block of economic development, and constitutes one of the vital infra-structural inputs in socio-economic development. The demand for electricity has been increasing due to extensive urbanization, industrialization, and a rise in the standard of living, as is the case with residential electricity consumption. This paper attempts to estimate the consumer surplus and the economic value of the residential consumption of electricity in Seoul to assist in decision-making in electricity management. The estimated consumer surplus represents the value of the area under the demand curve, above the actual price that is paid for residential electricity consumption. The estimated annual consumer surplus and economic value for the year 2005 amount to 2,144.7 and 3,727.4 billion won, respectively. The estimates per kWh were 184.9 and 316.0 won, respectively, which imply that the consumer surplus and the economic value of residential electricity consumption significantly outweigh the average price of electricity in 2005 of 91.1 won per kWh.
Technologies and Patent Applications for Battery Electric Vehicle
Cho, Mann ; Lee, Chang-Hoan ;
Journal of Energy Engineering, volume 21, issue 1, 2012, Pages 86~108
DOI : 10.5855/ENERGY.2012.21.1.086
reduction, energy security, and emission reduction are the critical issues in the current automotive industry. As one of the solutions to these issues, Battery Electric Vehicle is attracting attention recently. Advanced battery electric drive vehicle require batteries, power electronics and electrical machines to function. These devices allow the vehicle to use energy from the battery to assist in the propulsion of the vehicle. In this paper, the main feature of these technologies are briefly introduced and recent trends of patent applications are described.
A Study on the Economic Impacts of Korean Climate Industry - Focusing on Renewable Energy Industry -
Hong, Jun-Suk ; Park, Sung-Hwan ; Park, Jung-Gu ;
Journal of Energy Engineering, volume 21, issue 1, 2012, Pages 109~117
DOI : 10.5855/ENERGY.2012.21.1.109
The climate industry could be defined as the group of industries responding to world climate change compacts. This study confined it to renewable energy and analyzed the economic impacts of Korean renewable industry, using 2009 Input-Output Table. This study estimated that Korean renewable industry made the production-induced impact of 1.1644 won(Korean money), and the value-added-induced impact of 0.3544 won through an increase in output growth of 1 won. Its job-creation impact is analyzed to correspond to 10.065 labors through an increase in output growth of 1 billion won. And its industrial linkage effects including forward and backward ones are analyzed not to be so great as expected. According to these results, some policies vitalizing Korean renewable industry and relating industries to its value-chain as new growth engines are recommended.