Go to the main menu
Skip to content
Go to bottom
REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Journal of the Korean Society of Marine Engineering
Journal Basic Information
Journal DOI :
Korean Society of Marine Engineers
Editor in Chief :
Volume & Issues
Volume 38, Issue 10 - Dec 2014
Volume 38, Issue 9 - Nov 2014
Volume 38, Issue 8 - Oct 2014
Volume 38, Issue 7 - Sep 2014
Volume 38, Issue 6 - Jul 2014
Volume 38, Issue 5 - Jun 2014
Volume 38, Issue 4 - May 2014
Volume 38, Issue 3 - Mar 2014
Volume 38, Issue 2 - Feb 2014
Volume 38, Issue 1 - Jan 2014
Selecting the target year
The performance evaluation for H
reforming of the plate type hydrogen generation system
Heo, Su-Bin ; Yun, Bong-Seock ; Lee, Do-Hyung ;
Journal of the Korean Society of Marine Engineering, volume 38, issue 6, 2014, Pages 602~608
DOI : 10.5916/jkosme.2014.38.6.602
Hydrogen energy, a field of low-carbon substitute energy, can be produced by fossile fuel reforming and electrolysis of water etc. We developed 1kW class flat type reformer for PEM Fuel Cells. The PEMFC is highly sensitive to carbon monoxide because CO has detrimental effects on the performance of the fuel cell. Thus, reformed gas supplied to Fuel cell system, which maintained CO concentration below 10ppm. After applying optimum drive condition, reformed gas was measured with gas chromatography and could find out about each experimental condition of
and CO concentration. As a results, The 1kW class plate type hydrogen generation system's optimum condition is A/F ratio
, STR temperature 1023K, S/C ratio 3, and
30cc/min. It turns out that installation of PrOx 2 stage is more efficient for reducing CO concentration.
Study on the performance of a heat pump system with serial dehumidification function
Ko, Wonbin ; Ko, Ji-Woon ; Park, Youn Cheol ;
Journal of the Korean Society of Marine Engineering, volume 38, issue 6, 2014, Pages 609~614
DOI : 10.5916/jkosme.2014.38.6.609
In this research, results of measuring temperature and relative humidity of underground-air-heat in Jeju showed
and 70~80% each which are somewhat high compare to other regions. So the Multi-effect dehumidifying and heating Heat Pump system which has merged functions of dehumidification and heating is made to solve this problem mentioned previously. When the suction air was
with 60% humidity, the outcome was 1.70 on
and 1.797(kg/h) on total amount of dehumidification, and also showed 1.87
with 1.87 total amount of dehumidification under the condition of
and 80% humidity of suction air. Furthermore,
showed increased number which is 1.87 and also total amount of dehumidification increased which was 3.269(kg/h). The highest COP can be achieved at
and 70% relative humidity condition.
A study on heat transfer and pressure drop characteristics of plain fin-tube heat exchanger using CFD analysis
Liu, Zhao ; Yoon, Jun-Kyu ;
Journal of the Korean Society of Marine Engineering, volume 38, issue 6, 2014, Pages 615~624
DOI : 10.5916/jkosme.2014.38.6.615
The fin-tube heat exchanger being used for industrial boiler, radiator, refrigerator has been conducted in various studies to improve it's performance. In this study, the characteristics of heat transfer and pressure drop was theoretically analyzed according to longitudinal pitch, location of vortex generator, bump phase and number of the tube surface about the plain fin-tube heat exchanger. The boundary condition for the CFD (Computational Fluid Dynamics) analysis applied with the SST (Shear Stress Transport) turbulence model assumed as the tube surface temperature of 333 K, the inlet air temperature of 423-438 K and the inlet air velocity of 1.5~2.1 m/s. The analysis results indicated that the heat transfer coefficient is not affected highly by the longitudinal pitch, and the heat transfer characteristics was more favorable when the vortex generator was located in front of the tube. Also the bump phase of the tube surface indicated that circle type was more appropriate than serrated type and triangle type in the characteristics of heat transfer and pressure drop, and the sixteen's bump phase of circle type was most favorable.
An analysis on the characteristics of regasification system for LNG-FSRU depending on the changes in performance with vaporization and temperature of the heat source
Lee, Yoon-Ho ; Kim, You-Taek ; Kang, Ho-Keun ;
Journal of the Korean Society of Marine Engineering, volume 38, issue 6, 2014, Pages 625~631
DOI : 10.5916/jkosme.2014.38.6.625
In this study, according to increase of thermoelectric power plants that use LNG, LNG-FSRU(Floating-Storage and Regasification Unit) appeared and it is installed on the Topside in order to deliver in a gaseous state to consumers who are in the shore. This study about the study on the characteristics analysis of the system depending on changes in performance with the vaporization and temperature of the heat source. For the characteristics analysis of the system, we devided vaporization method into Ethylene glycol water vaporization method and sea water as a heat source. Then the system that can vaporize 200ton per hour of LNG of
and 10,400kPa was configured, and according to the temperature of supplied sea water, required minimum flow rate value was calculated. Also in case of using Ethylene glycol Water as a vaporization method, providing for regional and seasonal factors such as decrease of temperature of water. The system is configured by adding a steam boiler of
, 775kPa as heat source. The generation amount of the steam required according to the performance of the vaporizer compared to the water temperature changes in the steam boiler and the amount of required evaporative performance due to changes in the quantity of steam and Ethylene glycol Water was confirmed.
A study on vibration control of the engine body for a large scale diesel engine using the semi-active controlled hydraulic type of top bracing
Lee, Moon-Seek ; Kim, Yang-Gon ; Hwang, Sang-Jae ; Lee, Don-Chool ; Kim, Ue-Kan ;
Journal of the Korean Society of Marine Engineering, volume 38, issue 6, 2014, Pages 632~638
DOI : 10.5916/jkosme.2014.38.6.632
Nowadays, as part of an effort to increase the efficiency of propulsion shafting system, the revolution of the main diesel engine in CMCR(Contract Maximum Continuous Rating) is reduced whereas the stiffness of hull structure supporting the main diesel engine is relatively flexible. However, vibration problems related with resonant response of main diesel engine are increasing although top bracing is installed between the main diesel engine and the hull structures to increase natural frequency of engine body above CMCR to avoid resonant phenomenon. In this study, the dynamic characteristic of top bracing is reviewed by analyzing measuring results of general cargo ships which apply the hydraulic type instead of the friction type to control the natural frequency and the vibration of the engine body. Moreover, considering the vibration characteristic of the engine body and the hydraulic type of the top bracing by varying the number of top bracing, authors suggest the more effective way to control the vibration of the engine body despite of lower stiffness of the hull structure than in the past when the hydraulic type of top bracing is used.
The effect of heat exchanger type for exhaust heat recovery system on diesel engine performance
Kim, Cheol-Jeong ; Choi, Byung-Chul ; Park, Kweon-Ha ;
Journal of the Korean Society of Marine Engineering, volume 38, issue 6, 2014, Pages 639~647
DOI : 10.5916/jkosme.2014.38.6.639
Due to global warming and depletion of fossil fuels, technologies reducing
emission and increasing fuel efficiency simultaneously are required. An exhaust gas heat recovery system is a technology to satisfy both issues. This study analyses three types of heat exchanger installed on an exhaust pipe. In case of plate type heat exchanger, back pressure rapidly increased and maximum cylinder pressure reduced in high speed and maximum load, and back pressure increased over twice and specific fuel consumption also increased up to 2% which were the highest increasing rate. In case of fin tube type, the amounts of exhaust emissions and specific fuel consumption rate were less than the other two types. The effect of shell and tube was in the middle. Making a decision by only the effect on engine performance, a fin tube type is the best for exhaust heat recovery systems.
A study on design, experiment control of the waterproof robot arm
Ha, Jihoon ; Joo, Youngdo ; Kim, Donghee ; Kim, Joon-Young ; Choi, Hyeung-Sik ;
Journal of the Korean Society of Marine Engineering, volume 38, issue 6, 2014, Pages 648~657
DOI : 10.5916/jkosme.2014.38.6.648
This paper is about the study on a newly developed small waterproofed 4-axis robot arm and the analysis of its kinematics and dynamics. The structure of robot arm is designed to have Pitch-Pitch-Pitch-Yaw joint motion for inspection using a camera on itself and the joint actuator driving capacity are selected and the joint actuators are designed and test for 10m waterproofness. The closed-form solution for the robot arm is derived through the forward and inverse kinematics analysis. Also, the dynamics model equation including the damping force due to the mechanical seal for waterproofness is derived using Newton-Euler method. Using derived dynamics equation, a sliding mode controller is designed to track the desired path of the developed robot arm, and its performance is verified through a simulation.
Prediction of NO
emission for marine gas engines
Jang, Ha-Seek ; Lee, Ji-Woong ; Lee, Kang-Ki ; Choi, Jae-Sung ;
Journal of the Korean Society of Marine Engineering, volume 38, issue 6, 2014, Pages 658~665
DOI : 10.5916/jkosme.2014.38.6.658
Natural gas for marine diesel engine is considered as an important and clean source of energy because of simultaneously reducing the emission of NOx, SOx and GHG. Especially with a appearance of shale gas, the using of natural gas has been investigated aggressively and expected to expand rapidly. By the reports, gas engine and diesel engine were both in a similar performance in the power aspect, and the SFOC of gas engine was shown a little better than that of diesel engine. But the characteristics of exhaust gas emission were different according to various combustion technologies. And with lean burn technology, the emission of NOx could be reduced to 85% lower than that of diesel engine. In this paper, it was described that a simulation program has been developed to predict NOx emission. The developed program is adopted two-zone model and Wiebe function for combustion in cylinder. The effects of premixed and diffusive combustion could be simulated by using the excess air ratio as input data. And it was confirmed that the results of simulation were agreed with the general trends of exhaust gas emission according to various combustion conditions such as lean burn, premixed and diffusive combustion.
Sub-structure mode synthesis vibration analysis program development using Matlab
Park, Sok Chu ; Kim, Jeong Ryul ; Park, Kyung Il ;
Journal of the Korean Society of Marine Engineering, volume 38, issue 6, 2014, Pages 666~673
DOI : 10.5916/jkosme.2014.38.6.666
Finite Element Method(FEM) is the essential tools for analyzing structural and vibration problem. But common commercial program is high-priced and the usage is not easy. Hereby the authors developed FEM program by using Matlab, whose usage is very simple and whose performance is very high. For the convenience of use and calculating efficiency Component Mode Synthesis Method is adopted, which divides a structure by some sub-structures for easy handling, analyzes them by parts and analyzes the structure with encompassing Degrees of Freedom(DOF). And encompassed DOF could be restored to full DOF. To confirm the accuracy the program was applied to a flat plate, and the results were compared to experiment, and good agreements were achieved. The developed program is going to be opened to public.
Prediction of NO
emission for marine diesel engines of existing ship
Kim, Seong-Woon ; Jung, Kyun-Sik ; Kim, Houng-Soo ; Choi, Jae-Sung ;
Journal of the Korean Society of Marine Engineering, volume 38, issue 6, 2014, Pages 674~680
DOI : 10.5916/jkosme.2014.38.6.674
Monitoring systems of informations for ship performance have become important gradually for economical management of existing ship. Monitoring of NOx emission from marine diesel engines is one of them. The measurement of NOx emission, however has been many difficulties due to technical and costly problems. A monitoring by prediction method of NOx on-board ship according to sailing condition of ship could be an useful method. In this paper, it is discussed about modified method of one-zone model which has been utilized usually for analyzing the combustion process. The modified method is able to calculate the temperature of burned region from the result by one-zone model. Influences which excess air ratio during combustion process affected for the gas temperature and NOx emission were investigated. From the results variation of excess air ratio during combustion process could be estimated inversely through the comparison with measurement of NOx emission.
Effect of fuel injection timing on the combustion and NOx emission characteristics in a single cylinder diesel engine applied with diesel fuel for naval vessel and biodiesel
Lee, Hyungmin ;
Journal of the Korean Society of Marine Engineering, volume 38, issue 6, 2014, Pages 681~687
DOI : 10.5916/jkosme.2014.38.6.681
The objective of this work presented here was focused on analysis of in-cylinder combustion characteristic, engine performance, and nitrogen oxides emission characteristic from marine gas oil for propulsion diesel engine of naval vessels and biodiesel with fuel injection timing in a single cylinder diesel engine. In addition, combustion process was analyzed with a high speed camera of marine gas oil and biodiesel fuel. Retarding the fuel injection timing from
, in cylinder peak combustion pressure was gradually decreased, however, engine torque showed a tendency to increase. The highest nitrogen oxides level was measured at
, they were reduced at retarded and advanced condition on the basis of
. Comparing with combustion process of marine gas oil and biodiesel fuel at
, self-ignition timing of biodiesel fuel included oxygen content was faster than marine gas oil, however, a cautious observation indicates a slightly higher flame intensity for marin gas oil than biodiesel as a diffusion flame is developing.
Electrode bonding method and characteristic of high density rechargeable battery using induction heating system
Kim, Eun-Min ; Kim, Shin-Hyo ; Hong, Won-Hee ; Cho, Dae-Kweon ;
Journal of the Korean Society of Marine Engineering, volume 38, issue 6, 2014, Pages 688~697
DOI : 10.5916/jkosme.2014.38.6.688
In this study, electrode bonding technology needed for high density of rechargeable battery is studied, which is recently researched for electric vehicle, the small leisure vessel. For the alternative overcoming the limit of stacking amount able to be stacked by conventional ultrasonic welding, the low temperature bonding method, eligible for minimum of degeneration of chemical activator on the electrode surface which is generated by thermal effect as well as the increase of conductivity and tension strength caused by electrode bonding using filler metal, not using conventional direct heating on the electrode material method, is studied. Specifically to say, recently used more generally the ultrasonic welding and spot welding method are not usable for satisfying stable electric conductivity and bonding strength when much electrode is stacking bonded. If the electrical power is unreasonably increased for the welding, due to the effect of welding temperature, deformation of electrode and activating material degeneration are caused, and after the last packaging, decline of electrical output and generating heat cause to reduce stability of battery. Therefore, in this study, induction heating system bonding method using high frequency heating and differentiated electrode method using filler metal pre-treatment of hot dipping are introduced.
Fundamental study on the weldability and formability of INCOLOY825 alloys and STS316L alloys
Kim, Pyung-Su ; Choi, Ho-Young ; Choi, So-Young ; Kim, Young-Sik ; Kim, Jong-Do ;
Journal of the Korean Society of Marine Engineering, volume 38, issue 6, 2014, Pages 698~703
DOI : 10.5916/jkosme.2014.38.6.698
Currently, demand of liquefied natural gas as an alternatice energy inceases because of depletion of fossil fuels. it is accompanied by inceasing demand of LNG ship. Consequentially, it is expected that demand of bellows for LNG ship increase. The material used for LNG vessels's bellows is an alloy of INCOLOY 825 and STS316L, which are strong against low-temperature brittleness and seawater corrosion. This study establishes the welding condition of LNG vessel's bellows material in extremely low temperature, and analyzes the formability of weld through Erichsen Test. When welding was conducted at optimal condition, tensile strength of weld presneted strength value up to 90% compared with base metal. As results of formalbility through Erichsen test, very good weld that failure occrued in base metal was gotten.
A numerical study on heat transfer and pressure drop of plate heat exchanger using at seawater air conditioning with the variation of channel spaces
Kim, Hyeon-Ju ; Lee, Ho-Saeng ; Yoon, Jung-In ; Son, Chang-Hyo ; Jung, Young-Kwon ;
Journal of the Korean Society of Marine Engineering, volume 38, issue 6, 2014, Pages 704~709
DOI : 10.5916/jkosme.2014.38.6.704
Plate heat exchanger is being applied in the field of marine plants and chemical industry, such as OTEC and SWAC equipment. The study aims to interpret the heat transfer and pressure drop characteristics of plate heat exchangers to determine the geometric design parameters such as the channel space. In this study, heat transfer performance was numerically studied with respect to the variation of channel spaces. The results from numerical analysis indicated that the j factor was linearly decreased with the flowrate of seawater over every cases. As the flowrate of water increased with respect to channel spaces, the j factor decreased linearly. And the f factor decreased linearly with the increase of flowrate. When the channel space is 2.8~3.2 mm and 3.2~3.2 mm, respectively, the area goodness factor of plate heat exchanger showed the highest performance.
Fuzzy-based adaptive controller for nonlinear systems
Lee, Yun-Hyung ; Yun, Hak-Chin ; Jin, Gang-Gyoo ; So, Myung-Ok ;
Journal of the Korean Society of Marine Engineering, volume 38, issue 6, 2014, Pages 710~715
DOI : 10.5916/jkosme.2014.38.6.710
This paper investigates the design scheme of fuzzy-based adaptive controller to give adaptability for controlling nonlinear systems. For this, a nonlinear system is linearized by the several subsystems depending on the operating point or parameter changes. Then, the sub-controller is designed by linear control scheme for each subsystem and the sub-controllers are fused with each gain of sub-controllers using fuzzy rules. The proposed method is applied to an inverted pole system which has structurally instability and nonlinearity, and simulation works are shown to illustrate the effectiveness by comparison with the interpolation-based adaptive Controller.
GA-based parameter identification of DC motors
Lee, Yun-Hyung ; So, Myung-Ok ;
Journal of the Korean Society of Marine Engineering, volume 38, issue 6, 2014, Pages 716~722
DOI : 10.5916/jkosme.2014.38.6.716
In order to design the speed controller of the DC motor system, firstly, parameters estimation of the system must be preceded. In this paper, we proposed the application of genetic algorithm(GA) optimization in estimating the parameters of DC motor. Estimated models are considered both first and second order models, and each estimated model is optimized by minimizing three different types of the evaluation function of GA. Also, GA is imported in comparison with estimation result of numerical analysis method because of its power in searching entire solution space with more probability of finding the global optimum. Data for parameter estimation is acquired from input and output signals of the actual experiment device and the butterworth filter also designs for removing noise in the signals. Finally comparison between real data of the actual device and estimated models is presented to indicate effectiveness and resolution of proposed identification method.
A smartphone toy control system based on bluetooth using stop-and-wait ARQ protocol
Song, J.H. ; Kim, H.K. ; Shin, O.K. ;
Journal of the Korean Society of Marine Engineering, volume 38, issue 6, 2014, Pages 723~729
DOI : 10.5916/jkosme.2014.38.6.723
When the bluetooth technology of smartphone is applied to a remote control system, communication errors caused by wave attenuation and interference results in the shortening of communication distance, loss of the target device control and malfunctioning. In this study, we propose a method to adopt a retransmission persistence controlled S/W ARQ in bluetooth communication to minimize the effect of the communication failure and to detect and handle the state where the target device gets lost control. We implemented a motor-driven RC car equpped with a bluetooth communication module and a steering application program on smartphone to test the proposed method. The experiments are conducted in three communication environments, and have resulted in the increase of the communication distance by at least 30% when S/W ARQ is applied. Moreover, when the communication was disrupted due to environmental disturbances, the S/W ARQ based system stopped immediately any undergoing operations to avoid possible malfunction.
A study on the EMI in special power distribution zone on ship
Park, Jong-Sung ; Choi, Gi-Do ; Kim, Jong-Woo ; Cho, Hyung-Rae ;
Journal of the Korean Society of Marine Engineering, volume 38, issue 6, 2014, Pages 730~736
DOI : 10.5916/jkosme.2014.38.6.730
Test standards for electrical and electronic equipment required for ship operations is applying the IEC-60533 standard. However, although a test procedure and a specified regulation are clearly defined in the deck and bridge zone and general power distribution zone, they are not regulated in the special power distribution zone with ship propulsion system. For these reasons, the costs for additional research and development have been invested. In this paper, we was measured power noise in a special power distribution zone in ship and we were compared and analyzed values measured. The actual experiments are performed on the ship of Korea Maritime and Ocean University. As a result, the acquired data on Hanbada shows that loop antenna with low frequency band(160kHz) and ultra log antenna with high frequency band(1.97GHz)occur about 6-8dB differences and about 8.7 difference respectively. Also, the acquired data on Hannara shows that each loop antenna of 1MHz, 11MHz, and 25MHz occurs about 7dB difference about 4-5dB differences respectively. so standard of Special distribution zone must be specified by comparative analysis of data obtained by the experiment more.
Design and fabrication of a high power LED searchlight
Kim, Se-Jin ; Kim, Sun-Jae ; Ha, Hee-Ju ; Kil, Gyung-Suk ; Kim, Il-Kwon ;
Journal of the Korean Society of Marine Engineering, volume 38, issue 6, 2014, Pages 737~743
DOI : 10.5916/jkosme.2014.38.6.737
This paper dealt with a retrofit high power LED searchlight to replace conventional 1kW halogen searchlights. The design specification meets KDS 6230-1046-1 and KS V 8469. An optical lens with the beam angle of
was used to meet the luminous intensity of 800,000cd at
in horizontal line. Heat dissipation of the LED searchlight adopted a free air cooling type which does not use a fan or a heat-pipe. From the test results, power consumption of the prototype LED searchlight was 148W which was saved by 85% comparing a halogen searchlight of 1kW. Luminous intensity was 945,000cd at
in horizontal line, satisfying KS V 8469. Luminous efficacy was improved by 4.7 times higher than that of the halogen searchlights. Beam angle, color temperature, and color rendering index(CRI) was
, 5,500K, and 70, respectively. Surface temperature of the LED searchlight was below
and surrounding temperature of the SMPS installed inside was below
which were satisfied with the IEC 60092-306.
A development of integrated monitoring and diagnosis system for marine diesel engine using time-series data
Rhyu, Keel-Soo ; Park, Jong-Il ; Hwang, Hun-Gyu ; Park, Dong-Wook ;
Journal of the Korean Society of Marine Engineering, volume 38, issue 6, 2014, Pages 744~750
DOI : 10.5916/jkosme.2014.38.6.744
The monitoring and abnormality warning of marine diesel engine are important to take appropriate responses for safety navigation. If maintenance engineers do not take appropriate response because of diagnosis mistakes, it will occur a nasty accident. Therefore, we need integrated monitoring and diagnosis system for supporting a diagnosis objectively. In this paper, we analyze time-series data which measured by real-time, monitor the changing of conditions and trends of the analyzed data. Furthermore, we design and implement a monitoring and diagnosis system for objective supporting of real-time diagnosis. When the integrated monitoring and diagnosis system is adopted, it can help to improve stability of marine diesel engine by providing abnormality warning alarm with appropriate responses.
Concept research of fuel cell system for the UUV
Kim, Hyeong-Dong ;
Journal of the Korean Society of Marine Engineering, volume 38, issue 6, 2014, Pages 751~760
DOI : 10.5916/jkosme.2014.38.6.751
The unmanned underwater vehicle(UUV) requires the highly dense energy source because of its limited space. Especially, for the UUV designed for long-term operation, it should be reviewed first whether it is possible to install the energy source against required total power. Therefore, this study identifies whether it is possible to install the energy source for the energy requirement of the UUV. And fuel and oxidizer requirement for the fuel cell system are calculated to determine its location and layout inside of the vehicle. Finally, we design the closed type 1kW polymer-electrolytic fuel cell system and check the applicability to underwater operations with UUV.
Morphological and sedimentological changes of subaqueous dunes in the tide-dominated environment, Gyeonggi Bay
Kum, Byung-Cheol ;
Journal of the Korean Society of Marine Engineering, volume 38, issue 6, 2014, Pages 761~770
DOI : 10.5916/jkosme.2014.38.6.761
In september 2004 and 2006, topographical and sedimentological survey were carried out using multibeam echosounder, which were to investigate shape characteristics, temporal changes and control factors of the subaqueous dunes in the southern Gyeonggi Bay. The present tidal current and sedimentary characteristics of study area make conditions that the sizes (length and height) of large subaqueous dunes are developed and maintained sufficiently. The change of sedimentary characteristics over time, the decrease in grain size causes reduction in the height of very large subaqueous dunes. Therefore it shows that the grain size of surface sediments is a primary control factor in defining subaqueous dune sizes in the study area.
Wave and surface current measurement with HF radar in the central east coast of Korea
Kim, Moo-Hong ; Kim, Gyung-Soo ; Kim, Hyeon-Seong ;
Journal of the Korean Society of Marine Engineering, volume 38, issue 6, 2014, Pages 771~780
DOI : 10.5916/jkosme.2014.38.6.771
We installed HF Radar of Array type in Site A and Site B, observing the real-time wave and current in the central East coast of Korea. WERA(WavE RAdar) in this research uses HF Radar of Array Type with frequency range of 24.525 MHz, developed by Helzel, Germany. Each site is a 8-Channel system consisting of four transmitters and eight receivers, generating wave and current data, being observed every thirty minutes at the present time. HF Radar has grid resolution of an interval of 1.5 km using bandwidth of 150 kHz; The wave data covers an observation range of about 25 km, and the current data covers the maximum observation range of about 50 km. The Wave data observed by HF Radar was compared and verified with the AWAC data observed in the research sites. MIT also compared the Current data observed by HF Radar with Monthly the East sea average surface current and current flow pattern provided by KOHA(Korea Hydrographic and oceanographic Administration). The regression line and deviation of the comparison data of Wave was calculated by Principal Component Analysis, which showed correlation coefficient 0.86 and RMSD 0.186. Besides, data analysis of long-term changes of the current in the East coast showed that, during August and September, the North Korean Cold Current flow into the southward direction and the East Korean Warm Current flow into the northward direction in the coast.