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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 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 of the Cooling Effect by the Long-wave Sky Radiation
Kim, J.H. ; Yu, J.Y. ; Suh, S.J. ;
Journal of the Korean Solar Energy Society, volume 21, issue 4, 2001, Pages 1~11
The authors carried out a study on the cooling effect of radiant cooling system using the metallic lightweight radiator for cooling energy saying in building. The radiant cooling performance was examined, analyzed, and presented through the case study. In this study, the cooling effect of various factors was analyzed, especially in a thin plate above the roof. These numerical results can be used as the basic design data for application of radiant cooling system. As a result of these researches, the system was verified to be an available cooling energy sources for improvement of indoor environment in summer. Finally, to complete the system can be suitable for Korean climate conditions, experimental study should be performed on the basis of these results.
The Estimate of Simulation performance for A Master Plan of Self-Sufficient House
Kim, B.S. ; Yoon, J.H. ; Baek, N.C. ; Lee, J.S. ;
Journal of the Korean Solar Energy Society, volume 21, issue 4, 2001, Pages 13~20
The purpose of this study is to analyze the effect of Super-insulation for self-sufficient house. The process of the study is presented in the following. 1) selection reference model for simulation and verification of reference model with computer simulation program(DOE2.1E and ESP-r 9.0). 2) analysis of effect according to insulation-thickness, installed insulation position, kinds of windows, rate of infiltration, Finally, the results of this study will be to provide the most reasonable method concerned with self-sufficient house.
Developing The Prediction Program of Heat and Cooling Loads by Modified Bin Methods
Lee, M.K. ; Kim, J.T. ;
Journal of the Korean Solar Energy Society, volume 21, issue 4, 2001, Pages 21~28
It is a time since sustainable architecture become a main issue of design concept in 21C. However, it is necessary to develope the tool estimating energy loads and uses in our architectural conditions for energy saving design. This study aims to develope the E-Load program to predict heat and cooling loads of houses. The program is developed by modified bin methods derived from ASHRAE TC 4.7. It consists of 4 divisions such as files, data inputs, energy load estimations and output options. The main processes of energy load estimations are based on ASHRAE fundamentals. The developed E-Load program is a easy and valid tool to predict heat and cooling loads of buildings.
Steam Reforming of Methane for Chemical Heat Storage As a Solar Heat Storage(Part 2. Parameters Effect on Methane Conversion)
Yang, D.H. ; Chung, C.H. ; Han, G.Y. ; Seo, T.B. ; Kang, Y.H. ;
Journal of the Korean Solar Energy Society, volume 21, issue 4, 2001, Pages 29~35
The chemical heat storage as the one way of utilization for high temperature solar energy was considered. The stram reforming reaction of methane was chosen for endothermic reaction. The reactor was made of stainless steel tube and it's dimension was 0.635 cm I.D. and 30 cm long, coiled tube because of the geometry requirement of solar receiver The effects of space velocity and reactants mole ratio on the methane conversion and CO selectivity were examined. From the experimental results, the optimum steam/methane mole ratio was determined.
An experimental study on thermal storage characteristics in the thermally stratified water storage system
Koh, J.Y. ; Kim, Y.K. ; Lee, C.M. ; Yim, C.S. ;
Journal of the Korean Solar Energy Society, volume 21, issue 4, 2001, Pages 37~46
This study describes the experimental study that focuses on the effects that distributor shapes and flow rate variations have an influence on the stratification in a rectangular thermal storage tank. Experiments were carried out under the conditions that the flow rates of working fluid are 20, 10 and
/min. The storage tank is initially filled with chilled water of
, and is extracted through the bottom at the same rate as the return warm water from load is entered through the distributor at the top of the tank. The thermo-cline forms at the top of the storage tank as the warm water enters the tank from the load through the distributor and the thermo-cline thickness increases with time. Emphasis is given to the effects of mixing at the inlet that increases the thermo-cline decay Flow rate variation and inlet distributor shapes are the important parameters in deciding the performance of a storage system. Stratification degree increases with decreasing in inlet flow rate under
/min. Experiments shows that better thermal stratification can be obtain using the distributor to limit momentum mixing at the inlets and outlets. Also, 12% of improvement in the thermal energy usage has been achieved using the modified distributor discharging same flow rate in each lateral ports.
A Study on latent heat storage system with Solar heat(Part 1. Development of PCM modeling)
Ku, H.G. ; Kim, J.R. ;
Journal of the Korean Solar Energy Society, volume 21, issue 4, 2001, Pages 47~54
This study has been conducted to verify the possibility of adaptation of a latent storage type air-conditioning system, shifting the peak load of electronic power to a building. In this paper, an energy equation to evaluate performance of PEM(phase change material) has been suggested and solved, after discretization. As a result, it is confirmed that the results from the energy equation are correspond with those from present studies to analysis of one-dimensional solidification and to analysis of two-dimensional solidification.
A Performance Evaluation of Sensor Type Sun Tracking System
Park, Y.C. ; Kang, Y.H. ;
Journal of the Korean Solar Energy Society, volume 21, issue 4, 2001, Pages 55~62
A parabolic dish concentrator used in a high temperature application of solar energy tracks the sun's movement by two axis sun tracking system. In such a system, sun tracking performance affects the system efficiency directly. Generally the higher the tracking accuracy is, the better the system performance is. A large number of parabolic dish type concentrators has been developed and implemented in the world. However none of them clearly provided a qualitative method of how the accuracy of the sun tracking system can be evaluated. The work presented here is the evaluation of sun tracking performance of parabolic dish concentrator, which follows the sun's movement by the sensor, using a computer vision system. We install a camera on the parabolic dish concentrator. While the concentrator follows the sun, sun's images are captured continuously. Then the performance of sun tracking system was evaluated by analyzing the variation of the position of the sun in the captured images.
Study on the Optical Performance of Evacuated Solar Collectors
Chun, Won-Gee ; Kang, Sang-Hoon ; Kim, Ki-Hong ; Lee, Yong-Kuk ; Chang, Rae-Woong ;
Journal of the Korean Solar Energy Society, volume 21, issue 4, 2001, Pages 63~71
This work has been carried out to find the ideal operating conditions for solar vacuum tube collectors which are widely used at present. Various types of solar collectors including a flat plate one were experimentally tested and examined to determine their thermal efficiencies and operating characteristics. Generally, solar vacuum tubes can be classified into two groups according to their design features. Of these, one is characterized by the insertion of a metallic device(such as a finned heat pipe) in an evacuated glass tube for the collection and transportation of solar energy. The other utilizes double glass tubes where the smaller one is contained inside the bigger one and soldered to each other after the small gap between them is evacuated. Both of these solar collectors are designed to minimize convection heat losses by removing the air which is in direct contact with the absorber surface. The performance of the former type can be readily analyzed by applying the relevant correlations developed for flat plate solar collectors. This has been demonstrated in the present study for the case of a solar collector where a heat pipe is inserted in an evacuated tube.
A Revaluation of Solar Energy Resources in Korea
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 4, 2001, Pages 73~83
Since the solar radiation is the main input for sizing any solar system, it will be necessary to understand and evaluate the insolation data. The horizontal global insolation data have been measured since May, 1982 and direct normal solar insolation data since December 1990 at 16 different sites all over the country and considerable effort has been made for constructing a standard value from measured data at each station. In the results, the average global total solar radiation of the nation is
and the average clear day direct normal solar beam radiation was
, which indicates possible solar energy application of medium and high temperature technologies with high concentration.