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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of the Korean Solar Energy Society
Journal Basic Information
Journal DOI :
The Korean Solar Energy Society
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Volume & Issues
Volume 21, Issue 4 - Dec 2001
Volume 21, Issue 3 - Sep 2001
Volume 21, Issue 2 - Jun 2001
Volume 21, Issue 1 - Mar 2001
Selecting the target year
A Study on the Fixed-Concentrating Hybrid Panel using Reflector
Kim, Kiu-Jo ; Kim, Wan-Tae ; Lee, Tae-Ho ; Yoo, Hung-Chul ; Huh, Chang-Su ;
Journal of the Korean Solar Energy Society, volume 21, issue 2, 2001, Pages 1~8
The most effective methods for utilizing solar energy are to use the sunlight and solar thermal energy such as hybrid panel simultaneously and to use concentrator. From such a view point systems using various kinds of photovoltaic panels are constructed in the world. However, there has not been a hybrid panel with a concentrator. If the sunlight is concentrated on solar cell, cell conversion efficiency increases and the temperature of the solar cell s increases. As the temperature of the solar cells increases, the cell conversion efficiency gradually decreases. For maintaining the cell conversion efficiency constant, it is necessary to keep solar cell at low temperature. In this paper, after designing a concentration rate for concentrating, we propose a model for cooling the cell and for using wasted heat. And, we compare it with conventional panels after calculating the electrical and thermal efficiency, using the energy balance equation.
Characteristics of Welded Zone Using Solar Energy Concentration
Prasad, K.D.V. ; Kim, I.S. ; Sung, B.S. ; Kim, B.C. ;
Journal of the Korean Solar Energy Society, volume 21, issue 2, 2001, Pages 9~17
In this paper the attempts made by the authors to explore the feasibility of utilising concentrated solar beam radiation for joining engineering thermoplastics such as Acrylonitrilc/Butadiene/Styrene (ABS), Polycarbonate(PC) and Polymethylmethacrylate(PMMA) are presented. In addition, to study the joining of the materials, necessary experimentation with applying primer was performed. Tensile tests were conducted to determine the bond strength achieved at the specimen joint interface. Microscopic examinations of the fractured joints were performed in order to analyse the overall bond quality. Finally, the results in terms of bond strength achieved at the joint interface and energy consumed in the process were compared with those obtained with similar thermoplastic joining technique utilising microwave energy. In conclusion some advantages and limitations were outlined and necessary improvements of the jointing technique were recommended.
Atmospheric Clearness Analysis of Major Cities in Korea Using Solar Radiation
Jo, D.K. ; Chun, I.S. ; Jeon, M.S. ; Kang, Y.H. ; Auh, C.M. ;
Journal of the Korean Solar Energy Society, volume 21, issue 2, 2001, Pages 19~25
Atmospheric clearness index is one of the main factors in the evaluation of the atmospheric condition. The work presented here is the evaluation and comparison of atmospheric conditions using clearness factor for 15 cities in Korea. Clearness factor was computed with the assumed clear day, where clear day model was obtained using average global insolation, cloud amount and duration of sunshine measured for 18 years (1982-1999). The dearness index proposed in this work could be used by the atmospheric circumstance analysts, solar designers and users.
Thermal Energy Characteristics and Simulation Model Development for Greenhouse Heating System Using Solar Energy
Ro, J.G. ; Song, H.K. ;
Journal of the Korean Solar Energy Society, volume 21, issue 2, 2001, Pages 27~34
The greenhouse heating system using solar energy has been realized in the protective agriculture in this study in order to analyse the thermal energy characteristics of the system the effects of ambient air temperature, solar radiation, relative humidities and water content of ambient air on the greenhouse air temperature were investigated through computer simulation experimental analysis for validation of the simulation. The results from this study are summarized as follows: 1) The expected values of inside air temperature for the system solar energy were very much close to the experimental values. 2) In the system using solar energy, the expected values of daytime surface temperature of soil by computer simulation were very much similar to the measured values, but those of nighttime were higher than the measured value by almost
. 3) Heat loss of daytime was found to be larger than that of night time as much as 2.0 to 4.2 times for the system using solar energy. 4) In the system using solar energy. while the ambient air temperature varied between
, the temperature of the inside air was maintained between
. 5) At the minimum ambient temperature of
, the temperature of the inside air was
A Study on the Performance of Natural Ventilation of Solar Chimney Using Stack Effect
Cho, S.W. ; Lee, J.Y. ;
Journal of the Korean Solar Energy Society, volume 21, issue 2, 2001, Pages 35~43
The results of numerical simulation on the performance of a solar chimney system in building are described. The inside surface temperature of four walls within the solar chimney arc calculated with solar radiation and outdoor temperature in summer. The air within the solar chimney is heated by conduction, convection and radiation. Air temperature distribution from the bottom to the top and outlet air temperature can be obtained by solving energy balance equation. Since the buoyance or stack effect is affected by temperature difference between the bottom and the top within the solar chimney. It is evaluated using inlet and outlet temperatures. It is expected that natural ventilation by the solar chimney of witch the height is 7.8m and the cross sectional area is
can provide about
on sunny day.
Study on the characteristics of optical fiber for photocatalytic system
Jeong, Hee-Rok ; Joo, Hyun-Ku ; Park, Sang-Eun ; Jun, Myung-Seok ; Auh, Chung-Moo ; Moon, Il ;
Journal of the Korean Solar Energy Society, volume 21, issue 2, 2001, Pages 45~54
In this study, the characteristics of optical fibers for the application in photocatalytic system was investigated using the intentionally designed accessories for spectrometer and radiometer to resolve the problems associated with the conventional system such as cost and structural restrictions from artificial lamp usage, to broaden the application fields into underground, and to utilize solar light in the future. To do this two kinds of optical fibers, plastic optical fiber (POF) and quartz optical fiber (QOF) were compared in terms of characteristics related with light transmittance and absorption and reactivity in TCE degradation.
Photocatalytic degradation of MTBE in gas phase
Park, Sang-Eun ; Joo, Hyun-Ku ; Jeong, Hee-Rok ; Chun, Myung-Suk ; Auh, Chung-Moo ; Kang, Joon-Wun ;
Journal of the Korean Solar Energy Society, volume 21, issue 2, 2001, Pages 55~67
This study contains the photocatalytic degradation of methyl-tert-butyl ether(MTBE), one of water-contaminating substances, into
. Herein was investigated factors, kinetics, and reaction pathways related with MTBE degradation. This works is possible to be applied in the field of environmental remediation such as undergroundwater purification with optimized system configuration in the near future.
Image Capturing of Dispersed Phases in DCHXs by Electric Tomography
Chun, Won-Gee ; Kim, Min-Chan ; Lee, Heon-Ju ; Kang, Yong-Heack ; Kwon, Hyok-Bo ;
Journal of the Korean Solar Energy Society, volume 21, issue 2, 2001, Pages 69~78
This paper introduces the physical phenomena involved in Direct Contact Heat Exchangers (DCHXs) and also investigates the possibility of applying of EIT(Electrical Impedance Tomography) technique for capturing the images of dispersed phases as they stream through a stagnant body of water. A number of cases are studied where two dimensional cross-sectional static images are given for fictitious and actual masses present in a column of water(saline solution). In most direct contact liquid-liquid heat exchangers, oil or hydrocarbon with a density different(lighter or heavier) from water is normally used as dispersed working fluid. The main difficulty that arises with this arrangement lies in the elucidation of complicated flow field where the dispersed phase fluid tends to change its shape and size constantly during its journey through the other phase(water). This paper presents a number of results with different types of dispersed phases that are immiscible with water. The EIT technique has been employed in this context to test its applicability in capturing the dynamic images of dispersed phases. It shows static images of dispersed phases where dynamic images could be obtained by simply extending the algorithms and strategies employed in the present analysis.