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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 25, Issue 4 - Dec 2005
Volume 25, Issue 3 - Sep 2005
Volume 25, Issue 2 - Jun 2005
Volume 25, Issue 1 - Mar 2005
Selecting the target year
A study on the Photovoltaic Tracker System Using Method of Intelligent control
Kim, Pyoung-Ho ; Baek, Hyung-Lae ; Cho, Geum-Bae ;
Journal of the Korean Solar Energy Society, volume 25, issue 1, 2005, Pages 1~10
In this paper, 150W photovoltaic system using neural network tracker is proposed, the system designed as the normal line of the solar cell always runs parallel the ray of the sun. This design can minimize the cosine loss of the system output results of solar cell are sensitive to the change of weather and insolation condition don't react rapidly to parameter condition change such as system circumstance and deterioration. To achieve precise operation of photovoltaic tracker system using method of intelligent control, Neural Network is used in the design of the photovoltaic tracker system drive. The control performance of this system drive influenced by the environment parameter such as weather condition and motor parameter variations. we used synchronous motor in this tracker and the experimental results show that the fixing system shows 10,159[Wh] and tracking system shows 12,360[Wh] electricity.
A Survey of Direct Normal Insolation Resources for the Construction of Solar Thermal Power Generation Sites in Korea
Jo, Dok-Ki ; Kang, Young-Heack ; Auh, Chung-Moo ;
Journal of the Korean Solar Energy Society, volume 25, issue 1, 2005, Pages 11~18
Since the direct normal insolation is a main factor for designing any solar thermal power system, it is necessary to evaluate its characteristics all over the country. We have begun collecting direct normal insolation data since December 1990 at 16 different locations and considerable effort has been made for constructing a standard value from measured data at each station. KIER(Korea Institute of Energy Research's new data will be extensively used by solar thermal concentrating system users or designers as well as by research institutes. From the results, we can conclude that 1) Yearly mean
of the direct normal insolation was evaluated for clear day all over 16 areas in Korea. 2) Clear day's direct normal insolation of spring and summer were
, and for fall and winter their values were
respectively. So, spring and summer were higher, and fall and winter were lower than the yearly mean value.
Effects of Absorber Tube Shape and Operating Conditions on Thermal Performance of All-Glass Evacuated Tube Solar Collectors
Choi, Eun-Young ; Kim, Yong ; Seo, Tae-Beom ;
Journal of the Korean Solar Energy Society, volume 25, issue 1, 2005, Pages 19~25
All-glass evacuated tube solar collectors consist of glass evacuated tubes and absorber tubes. Solar thermal energy from the sun is transferred to the working fluid through the glass evacuated tube and the absorber tube. Several collectors which have different absorber tubes are tested to find the effects of the absorber tube shapes and the operating conditions such as the incident heat flux and the flow rate. As the results, the efficiency of the collector which has a finned tube U tube is about
higher than that of the others in all cases on an average. And the collector has a finned U tube has the highest efficiency at the high flow rate and the low incident heat flux. In this condition, the outlet mean temperature is low and the heat loss becomes small. Also, it is known that the fin effect is greater than the shade effect.
A Study on Application of a Heat Recovery Ventilator using Photovoltaic System in School
Jang, Yong-Sung ; Suh, Seung-Jik ; Hong, Sung-Hee ; Yu, Kwon-Jong ; Park, Hyu-Soon ;
Journal of the Korean Solar Energy Society, volume 25, issue 1, 2005, Pages 27~34
This study aims to evaluate application of a heat recovery ventilator(HRV) using photovoltaic(PV) system. To this end, we analyzed performance of a PV system, which it was evaluated by monthly power wattage and conversion efficiency according to design capacity of a HRV. The results of this study can be summarized as follows. (1) A conversion efficiency of the PCS was evaluated about 86% in rated power. (2) A maximum, minimum and average output power were respectively analyzed 49.2W, 47.3W, and 48.8W. (3) Total power wattage of 200W PV system was 211kW and it was 316kW in case of 300W PV system. (4) Insufficient electrical power of a duct and window type ventilation system was respectively calculated 133.5kW and 147.7kW.
Absorbing Rate of Solar Irradiation on Glass Evacuated Tube Collectors Depending on the Absorbing Tube Shape
Seo, Tae-Beom ; Kang, Hee-Dong ; Kim, Yong ;
Journal of the Korean Solar Energy Society, volume 25, issue 1, 2005, Pages 35~44
The absorbing rate of solar irradiation on the surface of an absorbing tube in a glass evacuated solar collector is numerically investigated. Four different shapes of the absorbing tubes are considered, and the absorbed solar irradiation on the surface is calculated for several distances between the absorbing tubes and the incidence angle of solar beam radiation. From the calculation, it is known that the absorbing rate of solar irradiation on the tube surfaces depends upon the shape and the arrangement of absorbing tube and the incidence angle.
Analysis of the Irradiated Solar Heat Effect on Indoor Thermal Environment of the Top Floor Units of Apartment Houses in the Summer - On Condition that All Openings of the Units are Opened -
Choi, Dong-Ho ;
Journal of the Korean Solar Energy Society, volume 25, issue 1, 2005, Pages 45~55
In the summer, the irradiated solar heat gain through the roof has an effect on the thermal environment of the top floor units of apartment houses. This paper investigated the differences of the indoor air temperature, globe temperature and thermal comfort index between the top floor unit and the middle floor unit by measuring them at the sample units on the condition that all the openings of the units are opened. The purpose of this paper is to provide quantitative data about the irradiated solar heat gain during the summertime through the roof of an apartment house and these data to be the source to reevaluate the appropriate roof insulation efficiency. From this study, we obtained three brief results as follows. Indoor air temperature difference between the two sample units shifts a day. Indoor air temperature at the top floor unit is
higher than that of the middle floor unit from 12:00 p.m. to 12:00 a.m. and
lower from 12:00 a.m. to 12:00 p.m. The evaluation of the indoor thermal comfort index and the globe temperature shows similar results as the indoor air temperature measuring. Results of this experiment verified the actual existence of indoor air temperature difference between the top floor unit and the middle one and this difference comes from the heat storage of the roof.
A Study on the Performance of Blind type Double-Skin Facade System with PV modules
Jo, Hye-Jin ; Choi, Chang-Ho ; Lee, Hyun-Woo ;
Journal of the Korean Solar Energy Society, volume 25, issue 1, 2005, Pages 57~64
The present society have been polluted the earth environment by the rapid industrial growth. So, the meaning of sustainable development is doing more important. Therefore the technology skills of sustainable architecture techniques have been studied many-side of energy as like energy saving and substitutive energy. But, See the studies until now, there have been just one system either energy saving or substitutive energy. So, the paper studies about energy saving system with substitutive energy system(the double-skin facade system with PV modules) and presents the performance of system through the analysis of reduction of the energy load, the solar radiation on the slope angle of PV module, the blind effect in system.
The Development of the Automatic Computation Module for Optimum Stories of Apartment Buildings to Assure the Solar Access Right for Neighboring Areas
Seong, Yoon-Bok ; Yeo, Myoung-Souk ; Kim, Kwang-Woo ;
Journal of the Korean Solar Energy Society, volume 25, issue 1, 2005, Pages 65~78
The objective of this paper is to develop a automatic computation module for optimum stories in apartment buildings in order to assure the solar access right for neighboring areas. Compared to the existing solar access right analysis programs, the proposed solar access right analysis program is more improved and expanded by automating the computing process of optimum stories in apartment buildings. With the result of this research, it would be possible to furnish advanced information for an amicable settlement against the civil petition and disputes, to reduce waste of the time and money, and to improve the efficiency of solar access right analysis works.
A Prediction of Turbulent Characteristics in a Complex Terrain by Linear Theory
Yoon, J.E. ; Kyong, N.H. ; Kim, S.W. ;
Journal of the Korean Solar Energy Society, volume 25, issue 1, 2005, Pages 79~86
The external conditions for estimating dynamic wind loads of wind turbines, such as the turbulence, the extreme wind, the mean velocity gradients and the flow angles, are simulated over GangWon Wind Energy Test Field placed in one of the most complex terrain in Korea. Reference meteorological data has been gathered at a height of 30m from 2003 to 2004 with a ultrasonic anemometer. The absolute value of the spectral energy are simulated and the verification of this prediction has been carried out with comparing to the experimental data. The most desirable place for constructing new wind turbine are resulted as Point 2 and Point 3 due to the lower value of Turbulence Intensity and the higher value of wind resource relatively.
Feasible Approach for Image Reconstruction in Two Phase Flow Problems
Cheon, W.G. ; Lee, H.J. ; Lee, Y.J. ; Kim, M.C. ;
Journal of the Korean Solar Energy Society, volume 25, issue 1, 2005, Pages 87~96
A Study on the Thermal Behavior of Vertical Borehole Heat Exchanger with 1-Dimensional Model
Lee, Se-Kyoun ; Kim, Dae-Ki ; Woo, Joung-Son ; Park, Sang-Il ;
Journal of the Korean Solar Energy Society, volume 25, issue 1, 2005, Pages 97~104
A one-dimensional heat transfer model for the vertical borehole system is derived in this study to predict the thermal behavior of the system and surrounding soil. In this model the U-tube is replaced with one effective tube of effective diameter which is surrounded by concentric grout region. All thermal resistances of borehole are counted in the grout region with effective thermal conductivity of grout. Effective thermal conductivity of grout and sand are calculated through parameter estimation. The validity of this model is accomplished through comparison of the predicted temperature profiles of the model with experimental data.