Su-Jin Hwang

Su-Jin Hwang
Korea Institute of Energy Research | KIER · New and Renewable Energy Resource Map Laboratory

Doctor of Philosophy

About

21
Publications
971
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31
Citations

Publications

Publications (21)
Article
Full-text available
Korea is a very well-known country for having abundant tidal current energy resources. There are many attractive coastal areas for the tidal current power that have very strong currents due to the high tidal range and the acceleration through the narrow channels between islands in the west and south coasts of the Korean peninsula. Recently, the Kor...
Article
Full-text available
To be feasible, a master plan for renewable energy development should be based on reliable resource assessments. In particular, to reach carbon neutrality, long-term renewable energy potential prospects by 2050 are required. Such assessment is key to establish a future resource model by defining a proper future prospect scenario with regard to the...
Article
Full-text available
An accurate prediction of the wind energy production is essential in the initial design process of wind farms. Many researchers use meteorological data obtained from Numerical Weather Prediction (NWP) methods to predict wind energy production. The NWP method does not consider the influence of local topography and surface roughness on wind condition...
Article
Full-text available
In order to realize carbon neutrality, Korean Government is promoting the development of renewable energy with a focus on solar power and wind power. However, the development of wind power is delayed compared to that of solar power for which the achievements have exceeded the targets. When it comes to onshore wind power, development has been delaye...
Article
Full-text available
To assess wind resources in a given area, it is necessary to select a representative measurement point by identifying a wind zone where the wind resource characteristics are homogeneous. In this study, to identify the spatial homogeneity of wind resources, it was necessary to test several similarity measures for clustering analysis, such as time-se...
Article
Full-text available
In order to advance the onshore wind energy siting atlas, we developed the national wind resource classification map using ultra-high resolution wind resource maps and market economics models. The wind resource map was classified into fair and poor class suggesting presence or absence of economic feasibility, and good class in fair class was additi...
Article
Full-text available
In order to solve the problem of site compatibility, which is the biggest obstacle that delays the dissemination of onshore wind energy, the onshore wind energy siting atlas was developed. This study describes mapping and sensibility analysis of candidate sites based on the site suitability classification of wind resource, 24 environmental regulati...
Article
Tidal current power is one of the promising and reliable renewable energies with the advantage of continuous and predictable resource. It can make stable electricity regardless of weather conditions or seasons all year around. The required technologies for tidal current power in the ocean have been developed for years and now recognized that it cou...
Conference Paper
Even tidal current power can extract electricity from ocean current, it is to be installed and operated in a high current speed regions. Having a limited accessible window, it is very important and critical to minimize the retrieval and installation duration. Also the driverless scheme is very efficient to reduce any hazard to the diver during the...
Article
Full-text available
Recently, focus has been placed on ocean energy resources because environmental concerns regarding the exploitation of hydrocarbons are increasing. Among the various ocean energy sources, tidal current power (TCP) is recognized as the most promising energy source in terms of predictability and reliability. The enormous energy potential in TCP field...
Article
The west and south coastal regions of Korea are known to be of strong tidal current speed. With the increasing demand for renewable energies, the resource assessment has been a crucial issue which should be conducted before any detail planning and development of the potential sites for tidal current farm. Although there are several results of resou...
Article
This study describes the effect of upstream curved pipe on internal flow characteristics ball valve. Continuity and three-dimensional Reynolds-averaged Navier-Stokes equation have been used as governing equations for the numerical analysis. The upstream curved pipe - ball valve model was assumed that it is used for Alaska pipeline project which was...
Article
This study describes the effect of T branch shape on internal flow characteristics inside itself. Continuity and three-dimensional Reynolds-averaged Navier-Stokes equation have been used as governing equations for the numerical analysis. The T branch was modeled assuming that it is used for Alaska pipeline project which was planned to provide relia...
Article
The importance and understanding of renewable energy has increased even more after the nuclear power plant accident in Japan four years ago. Among the various renewable energy sources, tidal current power is recognized as the most promising energy source in terms of predictability and reliability. In general, a tidal current power turbine has two o...
Article
The turbine is one of the most important components in the tidal current power device which can convert current flow to rotational energy. Generally, a tidal turbine has two or three blades that are subjected to hydrodynamic loads. The blades are continuously deformed by various incoming flow velocities. Depending on the velocities, blade size, and...
Article
This paper describes thermal flow characteristics in various pipelines: straight pipeline and curved pipeline. In the permafrost area, pipelines are exposed to an extremely low temperature (-40^{\circ}C). In this situation, three-dimensional flow analysis should be analyzed to investigate thermal effects such as pressure drop, temperature change, v...
Article
Flexible risers have been used extensively in recent years for floating and early production systems. Such risers offer the advantage of having inherent heave compliance in their catenary thereby greatly reducing the complexity of the riser-to-rig and riser-to subsea interfaces. Another advantage with flexible risers is their greater reliability. C...
Article
Tidal-current power is now recognized as a clean power resource. The turbine blade is the fundamental component of a tidal current power turbine. The kinetic energy available within a tidal current can be converted into rotational power by turbine blades. While in service, turbine blades are generally subjected to cyclic fatigue loading due to thei...

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Project (1)
Project
Wind resource assessment is the process by which wind power developers estimate the future energy production of a wind farm. Accurate wind resource assessments are crucial to the successful development of wind farms.