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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
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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 Radiation and Convection Component Separated from Surface Combined Heat Transfer Coefficient on Dynamic Heat Load Simulation
Kim, Young-Tag ; Choi, Chang-Ho ;
Journal of the Korean Solar Energy Society, volume 25, issue 3, 2005, Pages 1~9
The purpose of this paper was to analyze the influence of radiation and convection component separated from surface heat combined transfer coefficient on dynamic Heat load simulation. In general, it was not considered the mutual radiation of walls that heat load simulation calculated by surface combined heat transfer coefficient. In order to solve this problem, we had developed new simulation program to calculate radiation heat transfer and convection heat transfer respectively, and verified the influence of radiation component with this new program, in indoor heat transfer process.
A Study on the Reliability Evaluation and Rehabitation of Solar Insolation Data by Field Measurement in Korea
Jo, Dok-Ki ; Kang, Young-Heack ;
Journal of the Korean Solar Energy Society, volume 25, issue 3, 2005, Pages 11~18
The Korea Institute of Energy Research(KIER) has begun collecting horizontal global insolation data since May, 1982 at different locations. Because of a poor reliability of existing data, KIER's new data will be extensively used by the solar system users as well as by research institutes. But the quality of solar insolation data is not always good. This reports on an attempt to identify systematic error in such data using clear-day analysis for data rehabilitation. Clear-day analysis is successful in uncovering solar insolation data of questionable quality. It is not proven that rehabilitation process can improve the quality of data for daily or monthly means, but it is suggested that the method can be used to improve the quality of data for monthly means of several years for use in many applications of solar energy planning. Earlier studies finding a maximum ETR of about 0.80 are confirmed.
A Study on Hydraulic Performance of Francis Turbine for Small Hydropower Plants
Choi, Ju-Seok ; Kim, Ok-Sam ; Kim, Il-Soo ; Chun, Chul-Kyun ; Moon, Chae-Joo ;
Journal of the Korean Solar Energy Society, volume 25, issue 3, 2005, Pages 19~25
Francis turbine of commercial small hydropower plants under 10kw which is investigate a flow characterist and an efficiency in the research which it sees, the problem and an improvement is investigate. In the research which it is simply model with casing, guide-vane, runner, draft tube for simulation numerical analysis of small-sized Francis turbine. Model uses the Gambit and it composes with approximately 800,000 non-uniform lattices. Solutions are investigate the hydraulic characteristics against an outward angle of guide vane, the number of guide vane, head(inlet velocity) by using FLUENT which is a commercial business code.
Thermodynamic Analysis of a Double-Effect Absorption Heating System Using Water-LiBr-LiSCN Solution with Solar Evaporator Heating
Won, Seung-Ho ;
Journal of the Korean Solar Energy Society, volume 25, issue 3, 2005, Pages 27~35
In this paper, a thermodynamic analysis was performed to provide design data for a double-effect absorption heating system with water-LiBr-LiSCN mixture which utilizes solar energy as evaporator heat source. In addition, a comparative study of the water-LiBr-LiSCN mixture against the water-LiBr pair was conducted by a computer simulation. The computer simulation is based on mass, material and heat balance equations for each part of the system. Coefficients of performance and flow ratios for effects of different operating temperatures are investigated. It is found that the heating COP is higher for the water-LiBr-LiSCN mixture than for the water-LiBr pair, and FR is lower for the former.
An Experimental Study of 30CMM Solar Transpired Collector and Cyclone(STCC) System on Indoor Air Dust Removal Performance
Noh, Ji-Hee ; Park, Sang-Hyun ; Kang, Eun-Chul ; Lee, Euy-Joon ;
Journal of the Korean Solar Energy Society, volume 25, issue 3, 2005, Pages 37~45
Higher requirement of advanced building design code and the development of construction technique have resulted in more thermal and air tight buildings. This has caused the sick building syndrome in a indoor air quality has been relatively getting worse. A new concept with a solar fresh air heating and electrostatic precipitator or called as STCC(Solar Transpired Collector and Cyclone) has been proposed to solve this IAQ issue. This paper describes the assessment study of STCC system under different outdoor airflow rates. The experiment was carried out under real condition with 30CMM STCC system test facility. Incense smoke was used to study the particle concentration decay trends under outdoor airflow rates 0CMM, 10CMM, 20CMM, 30CMM, with applied voltages of 5kV and 15kV for collecting and discharging electrodes of an Electrostatic Precipitator. Result shows that the particle decay increases by increasing the outdoor airflow rates. The collection efficiency, dust cleaning effectiveness(P) and application area calculation result comparisons have also been studied. This factors could be used to estimate how a dust of indoor air quality(IAQ) and removed for a building space with a STCC system.
Thermal Characteristics Evaluation of Concentrated Hybrid Panel with cooling system on PV module
Seo, Yu-Jin ; Huh, Chang-Su ;
Journal of the Korean Solar Energy Society, volume 25, issue 3, 2005, Pages 47~52
Normally if sunlight is directed on a solar cell without any increasing in temperature, the amount of absorption energy per unit area of each cell is increasing. In a silicon solar cell. however, cell conversion efficiency decreases with the increase of temperature. Therefore, to maintain cell conversion efficiency under normal condition, it is necessary to keep the cell at operating temperature. We tried to design and make new hybrid panel with cooling system to prevent increasing of temperature on cell, collect and use thermal energy more effectively. We compared performance of this new hybrid panel with current thermal panel. We also evaluated conversion efficiency, thermal capacity and confirmed cooling effects from thermal absorption efficiency.
Wind Resource Assessment of Antarctic King Sejong Station
Bae, Jae-Sung ; Jang, Moon-Seok ; Ju, Young-Chul ; Yoon, Jeong-Eun ; Kyong, Nam-Ho ;
Journal of the Korean Solar Energy Society, volume 25, issue 3, 2005, Pages 53~60
Energy resource is very important to the survival in the polar region. Wind energy, which is one of renewable energy, can guarantee the clean, inexhaustible, natural resource in the polar region. It is essential to assess the wind energy resource of the site where wind turbines will be installed. In the present study, the wind characteristics of the antarctic King Sejong station are analysed from its meteorological observation data. The wind resource of the Sejong station is also simulated and predicted using WAsP program. From the results, the Sejong station has very excellent wind resource and the site where small wind turbines will be installed is determined.
The Experimental Study for the Stall prevention of Wells Turbine
Kim, Tai-Whan ; Park, Sung-Soo ; Setoguchi, T. ;
Journal of the Korean Solar Energy Society, volume 25, issue 3, 2005, Pages 61~67
In order to improve the stall characteristics of the Wells turbine blade, experimental investigations have been made in the performance of the Wells turbine with 1), 2) grooved blade surface to reduce fraction drag against the steady and the sinusoidal flow condition. As the conclusion, the two methods are valid to improve the stall characteristics of the Wells turbine.
The Performance Evaluation Study of PV-Solarwall Unit Module Solar Thermal-Electric Energy
Kim, Yong-Hwan ; Cho, Yil-Sik ; Lee, Euy-Joon ; Hyun, Myung-Taek ; Kang, Eun-Chul ;
Journal of the Korean Solar Energy Society, volume 25, issue 3, 2005, Pages 69~75
The PV-Solarwall system has been introduced as a promising alternative to harness solar energy for both heating applications and electricity generation simultaneously. The system comprises a PV solar panel(for electricity generation). In addition, the solarwall incorporates a fan strategically located behind the PV panel to bring the warm and fresh air from the solarwall into the room. Because of its location and convective cooling principle, the fan also serves to reduce the operating temperature of the PV panel thereby increasing its efficiency. So this PV-Solarwall system holds much promise for saving heating and electricity costs compared with a PV system without solarwall. In particular, by controlling the tilt angle of the entire PV-Solarwall system between
(vertical), the performance of the system can be further evaluated. It is expected that the range of tilt angle PV-Solarwall between
will improve the output of the system.