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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 20, Issue 4 - Dec 2011
Volume 20, Issue 3 - Sep 2011
Volume 20, Issue 2 - Jun 2011
Volume 20, Issue 1 - Mar 2011
Selecting the target year
Modeling of the Thermal Behavior of a Lithium-Ion Battery Pack
Yi, Jae-Shin ;
Journal of Energy Engineering, volume 20, issue 1, 2011, Pages 1~7
DOI : 10.5855/ENERGY.2011.20.1.001
The performance and life-cycle costs of electric vehicle(EV) and hybrid electric vehicle(HEV) depend inherently on battery packs. Temperature uniformity in a pack is an important factor for obtaining optimum performance for an EV or HEV battery pack, because uneven temperature distribution in a pack leads to electrically unbalanced battery cells and reduced pack performance. In this work, a three-dimensional modeling was carried out to investigate the effects of operating conditions on the thermal behavior of a lithium-ion battery pack for an EV or HEV application. Thermal conductivities of various compartments of the battery were estimated based on the equivalent network of parallel/series thermal resistances of battery components. Heat generation rate in a cell was calculated using the modeling results of the potential and current density distributions of a battery cell.
Domestic Greenhouse Gas Reduction Policy
Bae, Sung-Ho ;
Journal of Energy Engineering, volume 20, issue 1, 2011, Pages 8~12
DOI : 10.5855/ENERGY.2011.20.1.008
For reducing greenhouse gas emissions, the short-term strategy is of existing energy-efficient appliances to facilitate the spread of energy efficiency improvements to improve energy efficiency, energy saving projects that will include investments to enable. R&D is at the core of the long-term strategy. To reduce energy demand, the equipments and processes improved energy efficiency should be developed. In terms of energy supply, the policies for greenhouse gas reduction is to replace fossil fuels by expanding the supply of renewable energy such as solar, wind, geothermal, biomass and nuclear power as nearly zero-emission of greenhouse gas. In terms of energy consumption, measures to reduce greenhouse gas emissions is in line with the policy for efficiency improvement. The buildings & work-site of high-energy consumption in the building & Industry sectors, should implement a policy to strengthening the voluntary agreement on energy-saving facilities and expand to invest in energy saving facilities.
Development of Land Fill Gas(LFG)-MGT Power Generation and Green House Design Technology
Hur, Kwang-Beom ; Park, Jung-Keuk ; Lee, Jung-Bin ;
Journal of Energy Engineering, volume 20, issue 1, 2011, Pages 13~20
DOI : 10.5855/ENERGY.2011.20.1.013
The high fuel flexibility of Micro Gas Turbine(MGT) has boosted their use in a wide variety of applications. Recently, the demand for biogas generated from the digestion of organic wastes and landfill as a fuel for gas turbines has increased. We researched the influence of firing landfill gas(LFG) on the performance and operating characteristics of a micro gas turbine combined heat and power system.
simultaneous recovery process has been developed for field plant scale to provide an isothermal, low operating cost method for carrying out the contaminants removal in Land Fill Gas(LFG) by liquid phase catalyst for introduce into the green house for the purpose of
rich cultivation of the plants. Methane purification and carbon dioxide stripping by muti panel autocirculation bubble lift column reactor utilizing Fe-EDTA was conducted for evaluate optimum conditions for land fill gas. Based on inflow rate of LFG as 0.207
/min, 5.5 kg/
, we designed reactor system for 70%
gas introduce into MGT system with
99% removal efficiency. A green house designed for four different carbon dioxide concentration from ambient air to 1500 ppm by utilizing the exhaust gas and hot water from MGT system.
An Application of Electrical Resistance Method for Monitoring of Rotating Cylindrical Separator
Lee, Bo-An ; Kim, Sin ;
Journal of Energy Engineering, volume 20, issue 1, 2011, Pages 21~25
DOI : 10.5855/ENERGY.2011.20.1.021
In order to monitor a rotating cylindrical separator for radioactive waste, an electrical resistance method is proposed and its mathematical model is investigated. In a rotating radioactive waste separator, the electrical resistance between a pair of electrodes mounted on the inner wall of the vessel is related to the thickness of annular region of insoluble particle formed around the periphery and the concentration of the insoluble particle in that region. This work presents an analytical relationship among the aforementioned parameters based on a two-dimensional solution to the electrical potential equation and an empirical conductivity-concentration relation. Also, the feasibility of electrical resistance method for monitoring rotating cylindrical separators is discussed.
Thermal Performance of the Show-Case Cooler Using Ice Slurry Type Storage System
Lee, Dong-Won ; Kim, Jeong-Bae ;
Journal of Energy Engineering, volume 20, issue 1, 2011, Pages 26~29
DOI : 10.5855/ENERGY.2011.20.1.026
A promising alternative technology is the potential use of ice slurries as a secondary refrigerant in conventional cooling process. Ice slurries behave almost like a liquid and can be pumped through pipes although the energy capacity of ice slurries per unit volume is considerably higher than that for chilled water or brine due to the latent heat capacity of the ice particles. To give the basic data for the design of cooling systems using ice slurries, experimental study has been conducted to find out the performance of the cooling coil of show-case with ice slurries. Despite the fact that ice slurries entering the cooling coil had at least
higher temperature than that of R22, it was still capable of providing a similar cooling performance than that obtained with R22.
Characteristic Analysis of the Cooling System Using Ice Slurry Type Heat Storage System
Lee, Dong-Won ; Kim, Jeong-Bae ;
Journal of Energy Engineering, volume 20, issue 1, 2011, Pages 30~35
DOI : 10.5855/ENERGY.2011.20.1.030
To clarify the hydraulic and thermal characteristics of ice slurry which made from 6.5% ethylene glycol-water solution flow in the double tube and plate type heat exchanger, experimental studies were performed. The mass flux and ice fraction of ice slurry were varied from 800 to 3500 kg/
(or 7 to 17 kg/min) and from 0 to 25%, respectively. Through the experiment, it was found that the measured pressure drop and heat transfer rate increase with the mass flux and ice fraction; however the effect of ice fraction appears not to be significant at high mass flux region. At the region of low mass flux, a sharp increase in the pressure drop and heat transfer rate were observed depends on mass flux.
Depolymerization of Kraft Lignin at Water-Phenol Mixture Solvent in Near Critical Region
Eom, Hee-Jun ; Hong, Yoon-Ki ; Chung, Sang-Ho ; Park, Young-Moo ; Lee, Kwan-Young ;
Journal of Energy Engineering, volume 20, issue 1, 2011, Pages 36~43
DOI : 10.5855/ENERGY.2011.20.1.036
Plant biomass has been proposed as an alternative source of petroleum-based chemical compounds. Especially, aromatic chemical compounds can be obtained from lignin by depolymerization processes because the lignin consist of complex aromatic materials. In this study, kraft lignin, the largest emitted substance among several kinds of lignin in Korea, was used as a starting material and was characterized by solid-state
-Muclear Magnetic Resonance(
-NMR), Fourier Transform Infrared Spectroscopy(FT-IR), Elemental Analysis(EA). The depolymerization of kraft lignin was studied at water-phenol mixture solvent in near critical region and the experiments were conducted using a batch type reactor. The effects of water-to-phenol ratio and reaction temperature(
) were investigated to determine the optimum operating conditions. Additionally, the effects of formic acid as a hydrogen-donor solvent instead of
gas were examined. The chemical species and quantities in the liquid products were analyzed using gas chromatography-mass spectroscopy(GC-MS), and solid residues(char) were analyzed using FT-IR. GC-MS analysis confirmed that the aromatic chemicals such as anisole, o-cresol(2-methylphenol), p-cresol(4-methylphenol), 2-ethylphenol, 4-ethylphenol, dibenzofuran, 3-methyl cabazole and xanthene were produced when phenol was added in the water as a co-solvent.
Natural Convection Heat Transfer in Inclined Rectangular Enclosures
Chang, Byong-Hoon ;
Journal of Energy Engineering, volume 20, issue 1, 2011, Pages 44~53
DOI : 10.5855/ENERGY.2011.20.1.044
The laminar natural convection of air in 2-D rectangular enclosure in which two opposing isothermal walls were kept at different temperatures is investigated numerically for Rayleigh number up to
. Computations were performed for the width-to-height ratios of 1, 2, and 4, and for the inclination angle range of
. For each aspect ratio, the influence of the inclination angle on the flow patterns and heat transfer rates were examined for
. It is found that the growth of secondary flow in the corners led to the decrease in overall heat transfer for small aspect ratio case, and the transition from a three-cell structure to a unicell flow pattern in large aspect ratio led to a step-like change in heat transfer. A new correlation of mean Nusselt number is presented for the vertical case of
Study on subsidy policy of Electric Vehicle Using Break-Even Analysis
Yoo, Jong-Hun ; Kim, Hu-Gon ;
Journal of Energy Engineering, volume 20, issue 1, 2011, Pages 54~62
DOI : 10.5855/ENERGY.2011.20.1.054
Since the release of mid-term domestic GHG goals until 2020, in 2009, some various GHG reduction policies have been proposed. In case of the transportation sector for the mid-term domestic GHG goals, it targets to reduce about 30% regarding the doemstic economic growth until 2020. A major reduction method in passenger cars considers an electric car. In this study we analyze some various scenarios to compare between internal combustion engine car and electric car using break-even analysis. Through the analysis we suggest a subsidy policy for electric car.
A Study on the Impact of Korean GSP on Greenhouse Gas Emission Reduction of Developing Countries - Focusing on Indonesia, Brazil, and Ethiopia -
Kim, Min-Chul ; Park, Sung-Hwan ; Park, Jung-Gu ;
Journal of Energy Engineering, volume 20, issue 1, 2011, Pages 63~76
DOI : 10.5855/ENERGY.2011.20.1.063
This paper studies the impact of Korean introduction of the Generalized System of Preferences(GSP) to developing countries, which are continuously arguing to support research and development for reducing greenhouse gas(GHG) emission with developed countries in the Conference of the Parties(COP) of UNFCCC. This paper is focusing on the expecting effects of trade and GHG emission reduction when Korea provides GSP to Indonesia, Brazil, and Ethiopia, which are selected in the first session of Global Green Growth Institute(GGGI). This paper uses the methodology of the intra-industry trade index multiplied by Korean import-induced coefficients. To Indonesia, Korean probable GSP would benefit exports of Indonesian agriculture, forestry, fishery, and livestock farming industries, which would contribute to Indonesian reduction of GHG emission. To Brazil, the exports to Korea would increase in the GHG sensitive industries such as metal, fat, oils, food, and beverage industries. Ethiopia belongs to the least developed countries. So Korean GSP would support the exports and GHG reduction in Ethiopian agriculture, forestry, fisheries, textiles, and leather industries. Without conflicting most favored nation treatment(MFN) principle in WTO, the introduction of GSP would be a good compensation for GHG reduction to developing countries.