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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Journal of the Korea Society For Power System Engineering
Journal Basic Information
Journal DOI :
The Korea Society for Power System Engineering
Editor in Chief :
Volume & Issues
Volume 5, Issue 4 - Nov 2001
Volume 5, Issue 3 - Aug 2001
Volume 5, Issue 2 - May 2001
Volume 5, Issue 1 - Feb 2001
Selecting the target year
Trends of R&D for Gas Engine and Vehicle Promotion
Jeong, D.S. ;
Journal of the Korea Society For Power System Engineering, volume 5, issue 1, 2001, Pages 5~10
A Study on the Evaluation of Turbine Efficiency through the Performance Test of New Power Plant
Kweon, Y.S. ; Chung, H.T. ; Jung, Y.B. ;
Journal of the Korea Society For Power System Engineering, volume 5, issue 1, 2001, Pages 11~20
Super-critical type steam power plant, which operates with steam pressure above the super-critical point, has a good reputation recently and is adopted as a new standard of the Korean Electric Power Corporation. The reason for the good reputation lies in it's superior power efficiency. However, the field data of the new power plant for the verification of it's performance are still insufficient, and more empirical data are needed to acquire technologies on the effective operation of it. In this study, the authors analyzed the field test data on power efficiencies got in a super-critical type steam power plant, and evaluated the excellency of the new plant by comparing the efficiency data with the one got in a conventional sub-critical type steam power plant.
Investigation of the Three-dimensional Turbulent Flow Fields in Cone Type Gas Burner for Furnace - On the Turbulent Characteristics -
Kim, J.K. ; Jeong, K.J. ; Kim, S.W. ; Kim, I.K. ;
Journal of the Korea Society For Power System Engineering, volume 5, issue 1, 2001, Pages 21~26
This paper represents the turbulent intensity, the turbulent kinetic energy and Reynolds shear stress in the X-Y plane of cone type swirl gas burner measured by using X-probe from the hot-wire anemometer system. The experiment is carried out at flowrate 350 and
respectively in the test section of subsonic wind tunnel. The turbulent intensity and the turbulent kinetic energy show that the maximum value is formed in the narrow slits distributed radially on the edge of a cone type swirl burner, hence, the combustion reaction is anticipated to occur actively near this region. And the turbulent intensities
are disappeared faster than the turbulent intensity u due to the inclined flow velocity ejecting from the swirl vanes of a cone type baffle plate of burner. Moreover, the Reynolds shear stress
is distributed about three times as large as the Reynolds shear stress
in the outer region of the cone type gas burner.
Experimental Studies on the Heat Transfer Performance of Plain and Low Finned Thermosyphons
Ye, S.S. ; Han, K.I. ; Park, S.H. ; Cho, D.H. ;
Journal of the Korea Society For Power System Engineering, volume 5, issue 1, 2001, Pages 27~34
A Study on the Performance Analysis in the Plate and Shell Heat Exchanger
Seo, M.K. ; Park, J.H. ; Kim, Y.S. ;
Journal of the Korea Society For Power System Engineering, volume 5, issue 1, 2001, Pages 35~43
Heat exchangers are called with important devices which have been widely used in industrial fields. Therefore, the design method for a heat exchanger is an important study in the aspect of energy saving. In this study, performance analyses for two types of plate and shell heat exchangers having a corrugated trapezoid shape of a chevron angle with
, were executed and compared with experiments. For this study, the operation liquids were adopted with non-phase changing water. In the analysis,
method was used for a plate and shell heat exchanger and a program was constructed. Independent variables for a plate and shell heat exchanger are flow rate and inlet temperature. Compared with experimental data, the accuracy of the developed are
at the type A and type B in the heat transfer rate, respectively. In the pressure drop, the accuracy of the proposed program for a plate and shell heat exchanger is within
and 5% error bounds for the type A and type B, respectively.
A Study on the Thermal Characteristics of Agriculture Products in the Process of Low Temperature Vacuum Drying - With Cayenne as the Object Product for Drying -
Choe, S.Y. ;
Journal of the Korea Society For Power System Engineering, volume 5, issue 1, 2001, Pages 44~49
Low temperature vacuum drying technique shows very excellent energy efficiency and prominent drying performances compared with the conventional hot air drying technique. This study was focused on the thermal characteristics of the low temperature vacuum drying technique. From the results of this study, it was confirmed that the time consumption for drying with the new drying technique could be shortened to about 1/3 of the time consumption with the conventional hot air drying technique under the same drying conditions for wet products. Also, the maximum drying rate with the new drying technique reached to about
at about 400% of moisture content.
Numerical Study on The Performance of Annular Jet Pump
Kwon, O.B. ; Kwon, H.C. ;
Journal of the Korea Society For Power System Engineering, volume 5, issue 1, 2001, Pages 50~56
Jet pumps are used in a great number of engineering applications. In the present study, jet shapes, mixing chamber shapes, and numerical methods for predicting the performance of an annular-type jet pump are investigated to determine the optimal turbulence model. The flow fields are simulated by solving the momentum and the continuity equations with the standard
and the RNG
turbulence models at different Reynolds numbers. After that, they are compared with the corresponding experimental data to determine the optimal model. Next, various calculations are conducted to find an optimal shape using the selected turbulence model. The study shows us that the RNG
model predicts the performance more exactly, and also shows that the most effective performance can be achieved with
reducing angle and 130mm throat length.
A Development of Computing System for Hydraulic Design and Analysis of Ship-building Piping System
Chung, H.T. ; Jung, Y.B. ; Cho, J.W. ; Bae, J.S. ;
Journal of the Korea Society For Power System Engineering, volume 5, issue 1, 2001, Pages 57~63
In the present study, an interactive mode of the computing system has been developed for the hydraulic analysis of the circulating waters in the industrial pipings. The system consists of three separated modules, which are linked together with common graphical user interfaces. Application to the design of the cooling sea-water system for the ships was demonstrated to be very reliable and practical in support of design activities.
A Study on the Flow Characteristics for the Plate Chamber in Type of Oily Parallel Plate Water Separator
Kim, J.H. ; Han, W.H. ;
Journal of the Korea Society For Power System Engineering, volume 5, issue 1, 2001, Pages 64~72
According to the regulation of IMO, oil discharge from ships is allowed under 15ppm only and an oil filtering equipment is essential. However, for large ships using heavy fuel oil of over S.G 0.98 and viscosity 380cSt and system oil, it has been in difficulty to process with existing filtering type of oily water separator. A parallel plate type oily water separator which is one of gravity type separators can be used as an assistant equipment for the oil filtering system to meet the present IMO standard of 15 ppm, because it is an efficient method in dealing with a large amount of rich oil with high specific gravity. This work is focused on the fundamental investigation of the performance of the plate type oily water separator by visualization method and PIV(Particle Image Velocimetry) measurement to acquire multi-point velocity data simultaneously. The experimental results showed that the space of the plates acts a significant role in separating process and it was found that an important point to minimize a vortex flow is to flow a large amount of fluid in space of the plates in order to promote the efficiency of separation.
Analyses of Temperature Behaviours at Fabrication Processes for Microaccelerometer Sensors
Kim, O.S. ;
Journal of the Korea Society For Power System Engineering, volume 5, issue 1, 2001, Pages 73~79
A Study on the Fatigue Life Evaluation of Spot Welded Joints under Tensile-Shear Loading
Chung, K. ; Kim, H. ;
Journal of the Korea Society For Power System Engineering, volume 5, issue 1, 2001, Pages 80~88
The spot welding method has been used in the joining of structures, automotive body, railway carriage, aircraft, household electric appliances, precision parts etc., because of brief working, easy automation, available mass production, and convenience. In this paper, the effects of welding conditions on the fatigue life and the prediction of fatigue life based on fracture mechanics theory of spot welded joint were investigated. Fatigue tests were conducted with the tensile-shear specimens welded in the various current using cold rolled steel sheets. Fatigue life of spot welded joint was predicted and compared with experimental results. Using FEM(finite element method), we analysed the distribution of stress and the condition of deformation on the environments of nugget.
Effect of Current Density and Current Efficiency on the Decorative Property of Chromium Deposits using Oxalic Acid
Oh, L.S. ; Park, J.D. ;
Journal of the Korea Society For Power System Engineering, volume 5, issue 1, 2001, Pages 89~96
Decorative property of chromium deposition from oxalic acid bath containing chromium oxide and ammonium sulfate, has been examined over a wide range of bath compositions and plating conditions. The followings were determined as optimum bath composition,
, and operation conditions; pH
, current density of
at the bath temperatures of
. Bright chromium deposits were obtained over a wide range of ammonium sulfate concentration, bath temperature, and current density. The current efficiency decreased with increasing current density and bath pH, and increased with Increasing bath temperature. The highest current efficiency was obtained in the bath containing
of ammonium sulfate. Bright chromium deposits were not obtained at conditions of all the highest current efficiencies.
Precipitation Behavior of Laves Phase and Mechanical Properties of 10%Cr Ferritic Heat-resistant Steel Applied to the Power Plants
Kang, C.Y. ; Nam, K.W. ; Kim, H.J. ; Kim, C.G. ; Bae, D.S. ; Lee, J.M. ;
Journal of the Korea Society For Power System Engineering, volume 5, issue 1, 2001, Pages 97~103
The present study was investigated changes of precipitation behaviour of laves phase in ferrite single phase and ferrite-martensite dual phase and the mechanical properties of 10%Cr ferritic alloys. In the ferrite phase, laves phase was mainly precipitated, whereas in the martensite phase, carbide was preferentially formed during the initial stage of aging and with increasing aging time. Laves phase and carbide were simultaneously precipitated by precipitation of laves phase at around carbide. Strength and toughness were lowered by the disk-type precipitator in the initial stage of aging and toughness was recovered with increasing of aging time and then, decreasing by precipitation of laves phase.
Analysis of the Stresses for Hydraulic Actuator Cylinders using Boundary Element Method
Kim, O.S. ;
Journal of the Korea Society For Power System Engineering, volume 5, issue 1, 2001, Pages 104~109
The stress distributions of hydranlic actuator cylinder tube acting in uniform inner pressure were analysed by the boundary element method(BEM). STKM13C tube was utilized for machine structural purposes model, its inner radius was 100 mm and outer radius was 140 mm. Axial length was semi-infinite and the isoparametric element of BEM was used. Radial and tangential stresses are maximum(-20.3 MPa and 52 MPa) at the inner radius and the minimum at the outer radius of the hydraulic actuator cylinders for an industrial systems. Stress diminution ratio was about 0.6 MPa/mm. And then coincidence between the simulation techniques as exact results(Lame' equation) and finite element method(FEM) is found to be fairly good, showing that the proposed analysis by BEM is reliable.