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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Journal of the Korean Solar Energy Society
Journal Basic Information
Journal DOI :
The Korean Solar Energy Society
Editor in Chief :
Volume & Issues
Volume 28, Issue 6 - Dec 2008
Volume 28, Issue 5 - Oct 2008
Volume 28, Issue 4 - Aug 2008
Volume 28, Issue 3 - Jun 2008
Volume 28, Issue 2 - Apr 2008
Volume 28, Issue 1 - Feb 2008
Selecting the target year
Preliminary Estimation of Wind Resource Potential in South Korea
Kim, Hyun-Goo ;
Journal of the Korean Solar Energy Society, volume 28, issue 6, 2008, Pages 1~7
The wind resource potentials of South Korea are estimated as preliminary stage using the national wind map which has been being established by numerical wind simulation and GIS (Geographical Information System) exclusion analysis. The wind resource potentials are classifying into theoretical, geographical, technical and implementation potentials and the calculation results are verified by comparing to other countries' potentials. In GIS exclusion, urban, road, water body, national parks and steep slope area are excluded from onshore geographical potential while water depth and offshore distance from the shoreline are applied as offshore exclusion conditions. To estimate implementation potential, dissemination records of European countries are adopted which is about 1/8 of geographical potential. The implementation potential of South Korea would correspond 12.5GW which is 1.7 times of the national wind energy dissemination target until 2030.
Nozzle Effect for the Formation Enhancement of Methane Hydrate
Kim, Nam-Jin ; Chun, Won-Gee ;
Journal of the Korean Solar Energy Society, volume 28, issue 6, 2008, Pages 8~14
Methane hydrate is crystalline ice-like compounds which consist of methane gas of 99% and over, and the estimated amount of gas contained in hydrates is about 1 trillion carbon Ton. Therefore, they have the potential for being a significant source for natural gas, and 1
solid hydrates contain up to 172N
of methane gas, depending on the pressure and temperature of production. Such large volumes make natural gas hydrates can be used to store and transport natural gas. In this study, the tests were performed on the formation of methane hydrate by a nozzle. The result showed that utilizing nozzles dramatically reduces the time in hydrate formation, the pressure after the injection is decreased to be approximately 90% of experimental pressurethe, and gas consumption is higher about 3 times than that of subcooling test.
A Study on Solar Heating System Technology Combining Multiple Technology with Mutual-Complementary Method - Low-cost, high efficiency, large-scale use of solar heating system -
Nan, Bao-Xuan ;
Journal of the Korean Solar Energy Society, volume 28, issue 6, 2008, Pages 15~23
The article deals with system technology of a new solar heating system which systematically combines exiting solar collector technology, auxiliary electrical water heating, floor heating system and well insulated construction method and its application of this system to apartment house heating system in the cold region, and also analyzed performance of the new system in terms of technical and economic feasibility. Results shows that energy efficiency approaches up to 50% of the energy consumption of local construction from 1980 to 1981. The implementation of "DQ technology" to floor heating system achieved from 79% to 85% of the energy-saving benefits comparing to other housing units which were supplied by the local district heating plant.
Feasibility study of wind power generation considering the topographical characteristics of Korea
Moon, Chae-Joo ; Cheang, Eui-Heang ; Shim, Kwan-Shik ; Jung, Kwen-Sung ; Chang, Young-Hak ;
Journal of the Korean Solar Energy Society, volume 28, issue 6, 2008, Pages 24~32
This paper discussed the Feasibility study of wind power generation considering the topographical characteristics of Korea. In order to estimate the exact generation of wind power plants, we analyzed and compared wind resources in mountain areas and plain areas by introducing not only wind speed, the most important variable, but also wind distribution and wind standard deviation that can reflect the influence of landform sufficiently. According to the results of this study, generation was almost the same at wind power plants installed in southwestern coastal areas where wind speed was low as at those installed in mountain areas in Gangwondo where wind speed was high. This demonstrates that the shape parameter of wind distribution is low due to the characteristics of mountain areas, and the standard deviation of wind speed is large due to the effect of mountain winds, therefore, actual generation compared to southwestern coastal areas is almost similar in mountain areas even though wind speed is high.
Stress Behaviors of Superheater Tubes under Load Change Operation in HRSG
Chong, Chae-Hon ; Song, Jung-Il ;
Journal of the Korean Solar Energy Society, volume 28, issue 6, 2008, Pages 33~39
The purpose of this study is not only to evaluate the stress behavior of tubes in superheater in HRSG during the load change operation but also to find root causes of failure from stress behavior. Firstly, temperature during operation was collected to perform stress analysis from actual HRSG. Part load and full load stress analysis which can be represented as the whole load change operations were performed using commercial finite element software. The possibility that can lead to tubes failure is found by stress analysis and its results is compared with metallurgical mircrostructure of failed tube which was taken from actual HRSG.
A Study on the Evaluation of Energy Performance According to Greenery Cover in Education Buildings
Seok, Ho-Tae ; Yang, Jeong-Hoon ; Jung, Jae-Woong ;
Journal of the Korean Solar Energy Society, volume 28, issue 6, 2008, Pages 40~47
The importance for energy consumptions has being emphasized because of problems of the energy and environment. Especially, education buildings among public buildings which have being emphasized the application of environment-friendly elements because of large energy consumptions. Accordingly, this study established parameters of green walls and green roofs which have ecological effects and energy savings. And then this study analyzed indoor thermal environments and energy consumptions due to green walls and green roofs through the energy simulation(Visual DOE 4.0) and the actual measurement.
A Study on the Temperature Characteristics of the Floor Cooling System of Mock-up Experimentent
Yoo, Ho-Chun ; Lee, Young-A ;
Journal of the Korean Solar Energy Society, volume 28, issue 6, 2008, Pages 48~57
The research analyzed the distribution of the indoor temperatures of a radiant floor cooling system through mock-up experiments. It investigated the temperature difference of feed water, the vertical temperature difference of indoor air, the temperature difference of floor surface, and so on. The following is the results of the research. First, the research shows that the difference between indoor temperature and outside temperature was the smallest when the temperature of feed water was set at 16
. In addition, the temperature changes according to indoor positions (wall, room, floor, and ceiling) were the most uniform. Thus, the research found that the cold water temperature of 16
is the most proper. In addition, it confirmed that the feed water temperature of 18
is effective because the temperature can lower the temperature of a room to 13.55
, which is lower than the temperature of a non-cooling mode. Second, an investigation on the temperature distribution of vertical air in indoor space shows that the temperature distribution had a difference of 0.2 to 1.9
on the average, which satisfies the range of 3.0
in the standard of ISO.
A Study on Development of Ubiquitous Bio-Sensors for Increasing Energy Efficiency
Han, Seung-Hoon ;
Journal of the Korean Solar Energy Society, volume 28, issue 6, 2008, Pages 58~63
It is essential to investigate the structure and the main characteristic of Home USN (Ubiquitous Sensor Network) technologies in built ubiquitous environment while designing bio-sensors. For this study, Thermistor elements and Thermopile black body have been selected to implement ubiquitous technologies for bio-sensors and wireless network such as WiBro has been used to transfer sensing data to the BSN (Bio-Sensor Network) gateway. It is certain that efficiency of ubiquitous space design is improved if main components of each specific sensor network are analyzed precisely in digital way and corresponding communication modules are prepared accordingly. Ubiquitous technology, in conclusion, has to be applied not only with systematical mechanism or electronic setting but in human-centered atmosphere as well, keeping with deep consideration for bio-housing service factors in eco-friendly surrounding.
Development of Thermal Performance Analysis Program of Solar Heating System for District Heating System
Baek, Nam-Choon ; Shin, U-Cheul ;
Journal of the Korean Solar Energy Society, volume 28, issue 6, 2008, Pages 64~69
In this study the thermal performance and economic analysis program of solar heating system for district heating was developed. This program, named SOLAN-DHS and based on TRNSYS, consisted of four modules like as user's interface for system input/output, library, and utilities and a calculating engine. SOLAN-DHS simplifies user's input data through the database of most system engineering data including weather data of 17 areas in Korea. Five different types of solar systems which can be applicable to district heating system were presented in this program. Due to the user-friendly layout, all design parameters can be changed quickly and easily for the influence on system efficiency. The reliability of SOLAN-DHS was finally verified by the experiments.
A study on economic analysis of new renewable energy power(photovoltaic, wind power, small hydro, biogas)
Kim, Chong-Min ; Kim, Ki-Young ;
Journal of the Korean Solar Energy Society, volume 28, issue 6, 2008, Pages 70~77
The purpose of this study evaluates a feasibility and economical efficiency of new renewable energy. According as weather change is serious problem now days, every people make attention to the reduction of greenhouse gas. The revitalization of new renewable energy creates the variety of energy source, stability of energy supply and reduction of greenhouse gas. In this study evaluates a feasibility and economical efficiency from new renewable energy of various photo voltaics, wind power, small hydro and biogas. Feasibility does in standard of technical characteristic, politic support, marketability, establishment present condition and development aim. Economical efficiency does in standard of developmental unit cost, utilization factor, equipment life, politic support cost, interest ratio. The results of this study were as follows photo voltaics, wind, small hydropower, biogas in order feasibility is high. Developmental unit cost, utilization factor, equipment life, politic support cost and analyzed the relationship of interest ratio fluctuation and economical efficiency. From all new renewable energy the utilization factor most is important in economical efficiency but necessary utilization factor is difficult because environmental problem.
Assessment of Daylight Environment on Light Pipe System Under Different Solar Position
Shin, Hwa-Young ; Kim, Jeong-Tai ;
Journal of the Korean Solar Energy Society, volume 28, issue 6, 2008, Pages 78~86
The aim of this paper is to show the daylight environment of a light pipe system according to sun movement. A light pipe system has been mounted on the roof of the windowless full scale model: the solar spot has diameter of 0.65m and is 1.3m long, giving an aspect ratio of 1:2. The full scale model was installed on the rooftop of the SHINAN apartment in Yongin city that has no obstructions against sunlight. The test room is equipped with sensors for the measurements of the internal illuminance and has an area of 6m(W)
4m(H). The system has been monitored with a data-logger to evaluate the cumulative distribution of illuminance on a floor-plane from 16th, April to 29th, May, 2008 over one month and selected clear sky condition. For the daylight performance of floor area, the totally 49 measuring points has been used to determine the internal illuminance and an HP datalogger(HP34970A) records the measurements for one consecutive month. The horizontal external illuminance has been measured with two outdoor sensors. This paper presents the results of monitoring light pipe system with internal/external illuminance ratio and cumulative frequency distribution of floor-plane illuminance are discussed The results show that lightpipe is proficient device for introducing daylight into the building. However It provided different daylight indoor environment with wide or narrow Interquatile range of illuminance, internal/external illuminance ratio and cumulative frequency distribution according to solar positions under suuny sky condition. For more achieving the improvement of lightpipes also include energy savings, user visual comfort with various indicators; seasonal solar height, room and lightpipes geometries.
A Study on The development status and future of Photovoltaic Urban Project
Kim, Hyun-Il ; Suh, Seung-Jik ; Park, Kyung-Eun ; Kang, Gi-Hwan ; Yu, Gwon-Jong ;
Journal of the Korean Solar Energy Society, volume 28, issue 6, 2008, Pages 87~92
Buildings are responsible for approximately 50% of current carbon dioxide emissions. Energy planning at a town and city scale needs a strategic approach, supported by strong planning policies. The purpose of this study was to investigate the urban scale grid-connected photovoltaic(PV) system for urban residential and commercial sector applications. The integration of PV technology into roof of houses is an approach that is being championed in Germany, Japan and United states etc. In the Korea, PV roofing systems already are given the large number of houses which are projected to be built by 2012. However unlike germany and Japan, urban scale grid-connected PV system is not yet installed. The solar city which is installed building-integrated photovoltaic system is available to use of renewable energy sources such as solar to meet demand, instead of fossil fuels, with the goal of realizing an ecologically oriented energy supply.