Go to the main menu
Skip to content
Go to bottom
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 26, Issue 4 - Dec 2006
Volume 26, Issue 3 - Sep 2006
Volume 26, Issue 2 - Jun 2006
Volume 26, Issue 1 - Mar 2006
Selecting the target year
TRNSYS Dynamic Simulation for Solar Heating and Cooling Load Estimations
Choi, Chang-Yong ; Ko, Sang-Cheol ; Kwak, Hee-Youl ;
Journal of the Korean Solar Energy Society, volume 26, issue 1, 2006, Pages 1~6
This paper presents the heating and cooling load estimations for the library of a cultural center building located in Gwangju Korea by TRNSYS with Type 56 of multi-zone building components. In this study, energy rate control mode is selected and the design temperatures for heating and cooling are specified respectively as 20oC and 26oC. Reading rooms of the library are located on the third floor of the cultural center building, and this third floor space is modeled as the five thermal zones for the TRNSYS simulation. Among the five zones, attention is given to the two zones which are the reading rooms 1 and 2. Since these two zones are to be heated and cooled by the solar thermal system which is planned to be installed in the building, dynamic thermal behaviors of the two zones are analyzed by the heating and cooling load estimations.
A Characteristic Analysis on the Thermal Performance of the Dish Type Solar Concentrating System
Kang, Myeong-Cheol ; Kang, Yong-Heack ; Yoon, Hwan-Ki ; Yoo, Seong-Yeon ;
Journal of the Korean Solar Energy Society, volume 26, issue 1, 2006, Pages 7~12
The dish type solar thermal concentrating system can collect the solar energy above
. It has a concentration ratio of 800 and total reflector area of
. To operate solar receivers at high temperature, the optimum aperture size is obtained from a comparison between maximizing absorbed energy and minimizing thermal losses. The system efficiency is defined as the absorbed energy by working fluid in receiver divided by the energy coming from the concentrator. We find that system efficiency is stable in case of flow rate of above 6lpm. The system efficiency are 64.9% and 65.7% in flow rate of 6lpm and 8lpm, respectively. The thermal performance showed that the maximum efficiency and the factor of thermal loss in flow rate of 8lpm are 68% and 0.0508.
The Performance and Energy Saving Effect of a 2kWp Roof-Integrated Photovoltaic System
Lee, Kang-Rock ; Oh, Myung-Tack ; Park, Kyung-Eun ; Kim, Jin-Hee ; Kim, Jun-Tae ;
Journal of the Korean Solar Energy Society, volume 26, issue 1, 2006, Pages 13~19
The efficiency of building-integrated photovoltaic(BIPV) system is mainly determined by solar radiation and the temperature of PV modules. The performance of BIPV systems is reported to be different from that of conventional PV systems installed in the open-air. This paper presents the relationship of solar radiation and electricity generation from a 2kWp roof-integrated PV system that is applied as building elements on an experimental house, and the energy saving effect of the BIPV system for a typical house. For the performance evaluation of the BIPV system, it produced a regression equation with measured data for winter days. The regression equation showed that a comparison of the measured electricity generation and the predicted electricity generation of the BIPV system were meaningful. It showed that an annual electricity generation of the system appeared to cover around 52% of an annual electricity consumption of a typical domestic house with the floor area of
A Cost Analysis of the Heat Recovery Ventilator under Various Condition
Kang, Tae-Wook ; Koh, Jae-Yoon ;
Journal of the Korean Solar Energy Society, volume 26, issue 1, 2006, Pages 21~28
Changes in building construction methods and repairing of older buildings have reduced infiltration rate. Synthetic materials, release airborne particles and uneven healthy odor are increased. For preventing pollutants introduce fresh outdoor air into the building, simply letting fresh outdoor air into building, however, Is not a cost-effective way to ventilation. When additional ventilation is added to an existing HVAC system, the heating and cooling equipment, often cannot handle the increased load. A HRV provides a way to minimize in energy costs while introducing fresh air to a building. In this study, the economical research of HRV, made of three types of materials, are conducted. Heat recovering characteristics are studied at seasonal outdoor air conditions based on the outdoor air property condition at, Seoul in 2002. As a results, the average sensible effectiveness is 0.75 in the sensible heat exchanger and average total effectiveness is 0.65 in the total heat exchanger. The pay back period of the sensible heat exchangers are
year and it of total heat exchanger is 2.2 years.
A Detailed Survey of Solar Energy Resources for the Construction of Photovoltaic Power Generation Sites in East Asia Areas
Jo, Dok-Ki ; Kang, Young-Heack ;
Journal of the Korean Solar Energy Society, volume 26, issue 1, 2006, Pages 29~39
Since the solar radiation is the main input for sizing any solar photovoltaic system, it will be necessary to understand and evaluate the solar radiation data. The works presented here are the analysis of solar radiation data for East Asia areas. The data, which consist of the global radiation on horizontal surface, were measured at 16 different stations over the South Korea and were estimated by using satellite at 12 different stations over the North Korea from 1982 to 2004. Also the data over the Japan have been collected for 30 years for the period from 1941 to 1970. The Result of the analysis shows that the annual-average daily global radiation on the horizontal surface is
. We conclude, based on the analysis, that East Asia areas have sufficient solar energy resources for the photovoltaic power generation system.
Verification of the Validity of Moisture Transfer Model for Prediction of Indoor Moisture Generation Rate
Lee, Dong-Kweon ; Kim, Eui-Jong ; Choi, Won-Ki ; Suh, Seung-Jik ;
Journal of the Korean Solar Energy Society, volume 26, issue 1, 2006, Pages 41~47
Moisture in a building is one of the most important variables influencing building performance, human health, and comfort of indoor environment. However, there are still lacks in the knowledge of understanding the moisture problem well and controlling moisture. Accordingly, in order to provide the fundamental data to control moisture contents in the indoor air, this study was to predict moisture contents transferred through building envelopes and indoor moisture generation rate. Moisture transfer model was made by physical relations in each node, and the indoor moisture generation rate was gained by comparing the model with experimental analyses. From the study, we found out that moisture generation rate was critical and day-periodic, so that we predicted the indoor moisture content by substituting the constant value gained from the average in a day for the moisture generation rate.
A Study on the Operation Methods of Multipurpose BIPV System by Numerical Analysis
Kim, Eui-Jong ; Kim, Heon-Joong ; Suh, Seung-Jik ;
Journal of the Korean Solar Energy Society, volume 26, issue 1, 2006, Pages 49~55
The Multipurpose BIPV System(MBIPVS) was evaluated as an effective passive system through analyzing the thermal performance and the efficiency of PV power generation in the previous papers. To achieve the performance better, the operation method should be determined by considering physical conditions in each occasion. Thus, we cheesed the reference operation methods in each season set by the overview of the meteorological data for last 6 years, In-choen, and compared them with the various alternatives that we had made up with for improving thermal performance. The results from adopting various alternatives on MBIPVS showed that the appropriate operational model would be effective to the energy savings ; we could reduce the total loads 1,051.0[kWh] in summer and 108.9[kWh] in winter.
Deposition of Cermet Solar Selective Coatings for High Temperature Applications
Lee, Kil-Dong ;
Journal of the Korean Solar Energy Society, volume 26, issue 1, 2006, Pages 57~64
Cr-CrO cermet solar selective coatings with a double cermets layer film structure were prepared using a special direct current (dc) magnetron sputtering technology. The typical films structures from surface to bottom substrate were measured to be an
anti-reflection layer on a double Cr-CrO cermet layer on an Al metal infrared reflection layer. Optical properties of optimized Cr-CrO cermet solar selective coating were absorptance (
) = 0.95 and emittance (
) = 0.10 (
). Atomic force microscopy (AFM) image showed that Cr-CrO cermet film was very smooth and their grain size was also very small The results of thermal stability test showed that the Cr-CrO cermet solar selective coatings were stable for use at temperature of
Gas Concentration Measurement and Modeling at a Classroom with Ventilation System of Middle School in Pusan
Kang, Tae-Wook ;
Journal of the Korean Solar Energy Society, volume 26, issue 1, 2006, Pages 65~71
This study describes to analyze variation of carbon dioxide gas concentration by experimental and theoretical method according to the using patterns of ventilation system in a model classroom. Concentration of
gas varied by the occupancy and the ventilation systems are operating or not. More than 850 CMH ventilation system can maintain
gas concentration lower than 1,000 ppm along the class time and can be adopted the government guideline. Theoretical modeling of the concentration was performed at well-mixed ideal condition. Delays of concentration decay were shown at each case compared to actual.
Experimental Analysis of Ventilation Effect on the Performance of Building-Integrated PV Solar Roof
Kim, Jin-Hee ; Lee, Kang-rock ; Kim, Jun-Tae ;
Journal of the Korean Solar Energy Society, volume 26, issue 1, 2006, Pages 73~79
The integration of PV modules into building facades or roof could raise PV module temperature that results in the reduction of electrical power generation. Lowering operating temperature of PV module is important in this respect, and PV module temperature should be considered more accurately, for building-integrated PV(BIPV) systems in predicting their performance. This paper describes a BIPV solar roof design and verifies its performance through experiment In relation to the effect of ventilation in space between PV module and roof surface. The results showed that the ventilation in the space had a positive effect in lowering the module temperature of the BIPV solar roof that enhanced the performance of its electricity generation.
Experimental Study on the Thermal Effect of BIPV Modules Depending on the Ventilation Type of PV Module Backside
Yoon, Jong-Ho ; Kim, Jae-Ung ;
Journal of the Korean Solar Energy Society, volume 26, issue 1, 2006, Pages 81~89
Building integrated photovoltaic (BIPV) system operates as a multi-functional building construction material. They not only produce electricity, but also are building integral components such as facade, roof, window and shading device. On the other hands lots of architectural considerations should be reflected such as Installation position, shading, temperature effect and so on. As PV modules function like building envelope in BIPV, combined thermal and PV performance should be simultaneously evaluated This study is on the combined thermal and PV performance evaluation of BIPV modules. The purpose of this study is to investigate a temperature effect of PV module depending on the ventilation type of PV module backside. Test cell experiment was performed to identify the thermal and power effect of PV modules. Measurement results on the correlation of temperature and power generation were obtained. Those results can be utilized for the development of optimal BIPV installation details in the very early design stage
A Study of Non-Detection Zone using AFD Method applied to Grid-Connected Photovoltaic Inverter for a variety of Loads
Ko, Moon-Ju ; Choy, Ick ; Choi, Ju-Yeop ;
Journal of the Korean Solar Energy Society, volume 26, issue 1, 2006, Pages 91~98
Islanding phenomenon of utility-connected photovoltaic power conditioning systems(PV PCS) can cause a variety of problems and must be prevented. If the real and reactive power supplied by PV PCS are closely matched to those of load, islanding detection by passive methods becomes difficult. The active frequency drift(AFD) method, called the frequency bias method, enables islanding detection by forcing the frequency of the voltage in the islanding to drift up or down. In this paper, non-detection zone(NDZ) of AFD is analyzed for the islanding detection method of utility-connected PV PCS by the simulation software tool PSIM.
The Analysis of the Heating Energy in Apartment Houses with Pilotis
Ahn, Min-Hee ; Choi, Chang-Ho ; Lee, Hyeon-Woo ; Cho, Min-Kwan ;
Journal of the Korean Solar Energy Society, volume 26, issue 1, 2006, Pages 99~104
This paper presents an analysis of heating energy for apartment houses in apartment building, paying special attention on the effect of pilotis which is increasing recently. A four-zone model composed of one conditioned and three unconditioned space is developed in this study. IES VE is adopted to estimate heating energy. Especially, we used Apache module for a heating energy calculated. The predicted result shows fairly good agreements with the available measured data and simulation data. Heating energy needed for an apartment located on the pilotis floors is far greater compared with the case of intermediate floors. Insulation thickness of walls, floors and underground structure appears to be a dominant factor affecting heating energy, which leads to needs of revision of the related regulation. It is finally concluded that the location dependent, severe imbalance in heating energy should be improved and reflected in the policy making process and the design standards.