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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 14, Issue 4 - Dec 2005
Volume 14, Issue 3 - Sep 2005
Volume 14, Issue 2 - Jun 2005
Volume 14, Issue 1 - Feb 2005
Selecting the target year
An Experimental Study on Effect of Temperature and Oxygen fraction of Intake Air on Fuel Consumption in Radiant Tube Burner
Kim Hyun-woo ; Lee Kyung-Hwan ; Roh Dong-Soon ;
Journal of Energy Engineering, volume 14, issue 2, 2005, Pages 73~81
An Experimental study was conducted to investigate the effective way for fuel consumption improvement in radiant tube burner heating system used in steel manufacturing process. To find effectiveness of increase of temperature and oxygen fraction of intake air on fuel consumption, the model radiant tube burner heating system with recuperator was designed to be able to adjust temperature and oxygen fraction of intake air, and was operated under various conditions with oxygen concentration in exhaust gas changed. The results show that burner chamber temperature was increased about
of intake air temperature increase. so it was difficult to expect fuel consumption improvement. But only 1 or
increase of oxygen fraction in intake air made a significant improvement in fuel consumption even though it made much NOx emissions also. Therefore, if NOx emissions is controlled under regulation with burner modification, it is expected that increase of oxygen fraction in Intake air is effective way to improve fuel consumption.
Conditions to Introduce the Renewable Portfolio Standards in Korea
Chang, Han-Soo ; Choi, Ki-Ryun ; Kim, Su-Duk ;
Journal of Energy Engineering, volume 14, issue 2, 2005, Pages 82~97
RPS (Renewable Portfolio Standards) is a policy tool to disseminate renewable energies through market mechanism. RPS promotes renewable power generation by obligating electricity market participants to deliver the required amount of electricity from renewable energies. To promote and encourage renewable energies, Korean government is considering to introduce RPS to domestic market in the near future. The purpose of this paper is to analyze the definition and market mechanism of RPS and to review key considerations in its design. In conclusion, we recommend some prerequisite in its introduction to Korea.
A Numerical Study on Steam Flow and Beat Transfer of Pannier-arrangement Condensers
Hou Pingli ; Yu Maozheng ;
Journal of Energy Engineering, volume 14, issue 2, 2005, Pages 98~104
Pannier-arrangement condensers are usually adopted in the turbine generator units of combined cycle power plants. Optimization of operating performance and economy is an important goal, which requires accurate understanding of flow and heat transfer effects in the condenser. The tube bundle arrangement and steam flow behaviors of pannier-arrangement condensers are very different from those of common condensers. The physical model for existing numerical simulation program of condenser is refined by constructing the correlations for flow resistance and condensation heat exchange coefficient in which the influences of steam flow direction are considered according to available experimental data. The adaptability of the developed physical model and simulation program of pannier-arrangement condenser is verified with available experimental data.
The Study of the Photocatalytic Degradation for Microreactor
Choi B.C. ; Kim H.T. ;
Journal of Energy Engineering, volume 14, issue 2, 2005, Pages 105~111
In this study, the photocatalytic degradtion of D-glucose with the micro channel reactor was performed on the various experimental conditions. To apply the
coating on the micro channel reactor,
solution was synthesized by hydrolysis of titanium oxysulfate. The feeding rate was proportional to degradation rate of D-glucose solution over the micro channel reactor. Also, the reaction rate constant and Langmuir adsorption coefficient were calculated under various experimental conditions. And the results of these system photonic efficiencies were calculated. This study aims to understand the photocatalytic degradation characteristics on
coating in the micro channel reactor experimented by the feed batch reaction system.
Performance Analysis and Experiment of Ethernet Based Real-time Control Network Architecture
Lee, Sung-Woo ;
Journal of Energy Engineering, volume 14, issue 2, 2005, Pages 112~116
This paper describes the implementation of DCS communication network that provides high bandwidth and reliability. The network for DCS in this paper adopts the Reflective Memory (RM) architecture and Fast Ethernet physical media that have 100 Mbps bandwidth. Also, This network uses Ring Enhancement Device (RED) which is invented to reduce the time delay of each node. The DCS network that is introduced in this paper is named as ERCNet (Ethernet based Real-time Control Network). This paper describes the architecture and working algorithms of ERCNet and performs numerical analysis. In addition, the performance of ERCNet is evaluated by experiment using the developed ERCNet network.
A Study on the Cooling Characteristics of TMA by an Additive
Chung Nak-Kyu ; Kim Jin-Heung ; Kim Chang-Oh ; Kang Seung-Hyun ;
Journal of Energy Engineering, volume 14, issue 2, 2005, Pages 117~122
This study is performed to investigate the cooling characteristics of TMA
clathrate compound with an additive; the phase change temperature, the degree of supercooling, specific heat and the rate of volume change. The used additive is ethanol and the heat source temperature is
. Experimental results are as follows: 1) The phase change temperature is increased by
during the cooling process of TMA
clathrate compound with ethanol. 2) The degree of supercooling is repressed by
in case of TMA
clathrate compound with
ethanol. 3) The specific heat is increased by
in case of TMA
clathrate compound with
ethanol. 4) The rate of volume change is decreased by
in case of TMA
clathrate compound with ethanol.
A Study on the Wind rower Generation and Its Economic Feasibility at Daekwanryung
Ha Jeong-woo ; Kim Suduk ;
Journal of Energy Engineering, volume 14, issue 2, 2005, Pages 123~132
An economic feasibility study is performed for the wind power generation with the examination of the wind speed and its distribution at Daekwanryung at which a wind fm is under construction. In this analysis, the distribution of wind speed is the key issue. The wind distribution which is usually expressed in terms of Weibull distribution with shape factor and scale factor needs to be reexamined to find the proper values of them according to the empirical wind speed data. After this kind of analysis is done, annual power generation of wind is calculated. Due to the lack of cost information, we applied EWEA data instead or the actual information from the site. The result would be of use to determine the 'reference price' of wind power under the current system of 'compensating subsidy for renewable power generation'.
Activated Carbon-Photocatalytic Hybrid System for the Treatment of the VOC in the Exhaust Gas from Painting Process
Lee, Chan ; Cha, Sang-Won ; Lee, Tae-Kyu ;
Journal of Energy Engineering, volume 14, issue 2, 2005, Pages 133~139
An activated carbon-photo catalysis hybrid system is proposed for the treatment of VOC produced from paint booth. and its VOC removal performance is experimentally evaluated. Activated carbon tower is designed on the basis of the adsorption characteristics of toluene. Photocatalytic system is designed as the series of
fluidized bed reactor and
-coated filters. The present activated carbon-photo catalysis hybrid system shows the VOC removal efficiency within
under different VOC species and concentrations.
Global Environmental Impacts Assessment of Power Generation Technologies with LCA Method
Chung Whan-Sam ; Kim Seong-Ho ; Kim Tae-Woon ;
Journal of Energy Engineering, volume 14, issue 2, 2005, Pages 140~146
In this study, a quantitative environmental impacts assessment was performed for various power technologies with a lift cycle assessment (LCA) method. The LCA is regarded as a useful tool far analyzing diverse environmental impacts at a local, regional, and global aspect. The investigated power plants such as nuclear, coal, and LNC power systems were selected because they took share over
of domestic elec-tricity supply in Korea. Furthermore, a wind power technology was included as a representative energy source out of Korean renewable energy systems. According to the three geological aspects, environmental impacts had been categorized into eight types. For these impact categories, characterization had been carried out for comparing environmental burdens of power systems under consideration. Then, normalization had been done in order to gain a better understanding of the relative size among impact categories.
Fuel Consumption Rate Calculation Equation and its Application at fewer Boiler
Jang, Seok-Won ; Kim, Jae-Hoo ;
Journal of Energy Engineering, volume 14, issue 2, 2005, Pages 147~152
Calculation equations of fired fuel comsumption rating at boiler can lead from combustion anal-ysis and boiler heat balance using mass & energy conservations. By comparing calculation equation results with those of measurement, we can confirm the deviation of fuel consumption rate, and correction rate, and correction degree, and can also establish the proven technology to apply the equation at the site. We applied fuel rate equation to the operating power plant and recorded
of deviation at each coal and oil fired boilers. This range of deviation is regarded as trustable to apply the fuel consumption equation to the actual site.
Effect of tack of Fusion Defects on Short-Term Performance of Polyethylene Electrofusion Joints
Kil, Seong-Hee ; Kwon, Jeong-Rock ; Jo, Ji-Hwan ;
Journal of Energy Engineering, volume 14, issue 2, 2005, Pages 153~158
In order to investigate the short-term performance of polyethylene electrofusion joints, the mechanical tests and stress analysis have been conducted to the artificially defected weld joints. The defects of lack of fusion with a square-type were fabricated with 10, 20, 30, 40, 50, 60
size of the width of heat-ing wire zone, respectively. In this defect sires range, both tensile and bending test results showed the dependence of defect size to the electrofusion joints performance, but both sustained pressure and crush test results didn't. The numerical stress analysis results including the soil and internal pressures, tensile and bend-ing stresses clearly showed the dependence of fusion defect size. Based on both mechanical test and stress analysis results, the maximum acceptable defect size in polyethylene electrofusion joints is discussed.
Assessment of Practical Use of Recycling Oil from the Pyrolysis of Mixed Waste Plastics
Phae Chae-Gun ; Kim Young-shin ; Jo Chang-Ho ;
Journal of Energy Engineering, volume 14, issue 2, 2005, Pages 159~166
In Korea, although the generation of waste plastic has been increasing, the rate of recycling is considerably low and moreover, there is no suitable method for the treatment of waste plastics. However, pyrolysis, which is appropriate for the treatment of highly polymerized compounds, such as plastics, has recently gained much interest. In this study, a property of the products from the pyrolysis of mixed waste plastics, with a possible practical use for the recycling oil produced, were assessed. First of all, in order to investigate the pyrolysis characteristic of waste plastics, TGA (Thermogravimetric analysis) and DCS (Differential Scanning Calorimetry) were performed on a number of different plastics, including PP, LDPE, HDPE, PET and PS, as well as others. According to the result, it appeared that PP was the most efficiently pyrolyzed by changing the temperature, followed by LDPE, HDPE, PET, PS and the other plastics, in that order. From the results, the optimum conditions f3r pyrolysis were set up, and the different waste plastics pyrolyzed. The recycling oil produced from the flammable gases generated during the pyrolysis was com-pared with fuel oil by an analysis using the petroleum quality inspection method on KS(Korea industrial Standard). The results of the analysis showed the recycling oil was of a similar standard to fuel oil, with the exception of the ignition point, with a quality somewhere between that of paraffin oil and diesel fuel. With respect to these results, the quality of the recycling oil produced by the pyrolysis of waste plastics was suf-ficient for use as fuel oil.