• Journal of the Korea Academia-Industrial cooperation Society
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• v.12 no.2
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• pp.847-851
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• 2011

Photovoltaic System is increasing install capacity based on environmental-friendly characteristics. It have been actively studied to improve the efficiency. In order to design highly efficient system, it is important to understand the output characteristics of solar panels. The single diode model can represent the physical characteristics of solar panel. But it needs complex process such as mutli-step measurement and numerical analysis to get the exact parameters. In this paper, The method for extracting characteristic parameters of the single diode model based on the I-V characteristic curves in the panel manufacturer's data-sheet is presented. To verify the proposed method, solar cell model constructed in simulink. Simulink model output compared with output graph in datasheet.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.12 no.11
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• pp.5172-5177
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• 2011

This paper presents a reflection coating design scheme in the thin-film silicon solar cell. The antireflection(high reflection) coating skill is needed in the front(back) panel of the thin-film solar cell to improve an efficiency of light absorbing. In the single structure a reflectivity is changed according to the thickness of coating for antireflection scheme and its minimum value can be obtained by controlling thickness of coating. In the symmetric multi layer structure low reflectivity can be obtained in the wide wavelength range. And we also find that high reflectivity can be obtained through multi layer structure, which has alternate layers of high and low material, for high reflection scheme in the back panel.

• Proceedings of the KIEE Conference
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• 2000.11a
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• pp.113-115
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• 2000

So far, it was very difficult to simulate the dispersed generation system including PV generation system using EMTP or EMTDC because the source of the dispersed generation system has a particular VI characteristic equation. In this paper, a novel simulation method of PV generation system has proposed and a new solar cell component for EMTDC is also developed. The VI characteristic equation of solar cell is used in order to realize the solar generation system in EMTDC simulation. Consequently the simulation of PV power generation system using field data is realized and acceptable results, which show close match between the real data of PV panel and the simulated data, were obtained.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2019.05a
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• pp.137-138
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• 2019

The photovoltaic module connects the voltage generated by the solar cell to the inverter. In the photovoltaic module, a diode is used to block the reverse voltage from the inverter to the solar cell. The heat generation of this diode is the main cause of the solar connection fire. In this paper, we propose a method to monitor the heat generation of diodes and prevent fire by using IoT devices.

• Proceedings of the KSME Conference
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• 2001.06d
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• pp.152-157
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• 2001

UTC(Unglazed Transpired Collector) system has recently emerged as a new solar air heating technology. It is relatively inexpensive because it has not a glazed material. And it demonstrates efficient particularly for the applications in which larger wall area facilities with a high outdoor air requirement. Mathematical algorithm for UTC thermal modeling has been understood for further improvement of the system. EES and TRNSYS model of actual solar wall panel could be developed for computer simulations under other conditions. Computer models could be validated with the measured data from fixed outdoor test cell in KIER(Korea Institute of Energy Research). Major design parameters could be identified such as panel configuration and absorptivity and emissivity values for UTC design.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.27 no.12
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• pp.1-9
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• 2013

A standalone LED lighting system in using solar energy has been used usually less than 70W of lighting power because of a troublesome installation and maintenance. In this system, as more and more LED lighting power increases, the capacity of photovoltaic panel does proportionally, and to improve the charging efficiency of solar energy, MPPT(Maximum Power Point Tracking) techniques is used frequently, but the solar tracker is not. In this paper, a solar tracker which traces the light of the sun in varying hour to hour is studied to apply to the standalone LED lighting system. This solar tracker consists of twin axis for tracing the azimuth and altitude respectively, and it has a robust structure with safe mode to stand a strong wind. As a result of analysis, generating efficiency of the traced type has improved on the fixed one 28.84% on average.

• Journal of Bio-Environment Control
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• v.23 no.3
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• pp.221-228
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• 2014

In this study, we evaluated the efficiency of the dye-sensitized solar cell, through an analysis of the amount of energy and solar radiation according to the season. Solar array was installed next to a greenhouse in Gyeongsang National University (Latitude : N $35^{\circ}$ 9' 9.20", Longitude : E $128^{\circ}$ 5' 44.90", Altitude : 52 m), over a period of four months between August 2012 and February 2013, and solar radiation and generated electrical energy was measured and compared. The values was the greatest in October, showing that the vertical solar radiation on panel area was about 1,013.03MJ and the amount of generated power was about 4.87 kWh. The lowest values were obtained in November, showing that the vertical solar radiation on the panel area was about 755.25MJ and the amount of generated power was about 3.34 kWh. The average efficiency values were 3.12% in August, 2.60% in October, 2.39% in November, and 2.23% in February, respectively. Results of the study would be used as basic data when applying dye-sensitized solar cells to greenhouses in the future.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2010.05a
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• pp.658-661
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• 2010

The application of solar energy with creation of new industry is becoming diversification together. In this paper, we implement power supply the system of the single module type using solar energy. Through the implementation, we improve performance of system and it will be able to use for a long time efficiently also in the place where the electrical supply is difficult.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2014.10a
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• pp.675-676
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• 2014

Photovoltaic (PV) systems bosed on solar energy offer an environmentally friendly source of electricity. A key feature of such PV sysem is the efficiency of conversion at which the power converter stage can extract the energy from the PV arrays and deliver to the load. The Maximum power point tracking (MPPT) of the PV output for all sunshine conditions allows reduction of the cost installation and maximizes the power output from the PV panel. The proposed algorithm is to control the width of the pulse for battery charging based on the open voltage of the PV panel. As a lab results, the proposed system was implemented functions to adapt to the changes of the PV open voltage, and improved the charging efficiency.

• Journal of the Society of Naval Architects of Korea
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• v.44 no.2 s.152
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• pp.189-197
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• 2007

In this paper a study on the construction of a solar boat prototype is presented. Basic components of solar boats and the construction of a simple solar boat prototype by undergraduate students are described. Main purposes of this study are to examine the feasibility of developing commercial solar boats and to evaluate the effect of solar boat construction on the education of students. A low-cost solar boat prototype is constructed by assembling parts available in the market or laboratory. From the prototype construction experience, students obtained basic knowledge on the design and construction of commercial or racing solar boats. In addition, it is shown that the construction of a solar boat can be au effective educational program to expose students to practical multidisciplinary study involving naval architecture, ocean engineering, mechanical engineering, electrical and electronics engineering.