• 한국태양에너지학회 논문집
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• 제36권2호
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• pp.65-72
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• 2016

PV module is installed in various outdoor conditions such as solar irradiation, ambient temperature, wind speed and etc. Increase in solar cell temperature within PV module aggravates the behaviour and durability of PV module. It is difficult to measure temperature among respective PV module components during PV module operating, because the temperature within PV module depends on thermal characteristics of PV module components materials as well as operating conditions such as irradiation, outdoor temperature, wind etc. In this paper, simulation by using finite element method is conducted to predict the temperature of each components within PV module installed to outdoor circumstance. PV module structure based on conventional crystalline Si module is designed and the measured values of thickness and thermal parameters of component materials are used. The validation of simulation model is confirmed by comparing the calculated results with the measured temperatures data of PV module. The simulation model is also applied to estimate the thermal radiation of PV module by front glass and back sheet.

• 태양에너지
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• 제18권1호
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• pp.3-18
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• 1998

1994년부터 발효된 UN 기후변화협약은 지구온난화의 방지를 위해서 각국의 자발적인 이산화탄소 배출 저감을 의무 사항으로 규정하고 있다. 우리 나라도 21세기에 들어서면 본격적으로 이산화탄소 배출 저감을 추진해야 할 것으로 예상되지만 에너지 절약의 측면에서나 대체에너지 개발의 측면에서 다른 나라들보다 상황이 크게 불리한 입장에 있다. 기후변화협약에 대비하는 한 대안으로 태양에너지를 이용할 필요성이 상당히 증대될 것이기 때문에 앞으로 태양에너지 관련 기술에 대한 수요는 현재보다 상당히 높아질 것으로 예상된다. 이런 점을 감안해서 본고에서는 먼저 기후변화협약의 내용들을 살펴보고 이에 대응하는 수단으로서 태양에너지 기술 개발의 전망을 포괄적으로 검토하였다. 특히 우리 나라에서는 고효율 태양전지의 대량 생산 기술과 태양열 이용 온수기 및 난방 시설의 효율 증진 기술 등이 유망하다고 전망되었다.

• 한국태양에너지학회 논문집
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• 제22권3호
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• pp.31-37
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• 2002

This experimental study represents the results of an analysis on the characteristics of flux density distributions in the focal region of solar concentrator. The characteristics of flux density distributions are investigated to optimally design and position a cavity receiver. This deemed very useful to find and correct various errors associated with a dish concentrator. We estimated the flux density distribution on the target placed along with focal lengths from the dish vertex to experimentally determine the focal length. It is observed that the actual focal point exists when the focal length is 2.17 m. We also evaluated the position of flux centroid, and it was found that there were errors within 2 cm from the target center. The total integrated power of 2467 W was measured under focal flux distributions, which corresponds to the intercept rate of 85.8%. As a result of the percent power within radius, approximately 90% of the incident radiation is intercepted by about 0.06 m radius.

• 한국태양에너지학회 논문집
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• 제27권3호
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• pp.143-148
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• 2007

It is essential to know the flow characteristics at the risers of Flat-plate solar collector for optimum design. For flat-plate solar collector, it is difficult to experimentally study the effect for the number of riser in the collector for the economic problem. So, this study was performed to show the flow characteristics of flat-plate solar collector with the number of riser using commercial code FLUENT 6.0. The base collector size is chosen with $2\;m^2$ as 1m by 2m in this study, the mass flow rate was estimated 0.04 kg/s using the mass flow rate of 0.02 kg/s per collector area for the certificate test. The number of riser is selected 4, 6, 8, 10, 12, and 14. Through the simulation, the conditions with the risers of 10 or 12 is shown as the optimum design conditions for conventional flat-plate solar collector considering lower pressure drop and more uniformly distributed mass flow rate for higher heat transfer rate without considering heat transfer.

• 태양에너지
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• 제18권2호
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• pp.1-17
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• 1998

국내 태양열 이용기술 개발 현황을 분석하기 위해 기술의 중요성과 태양열의 특징을 소개한 후에 국내의 기술동향을 요소기술인 태양열집열기의 온수기, 산업용 중고온시스템 및 태양에너지건물이용기술순으로 분석하였다. 분석결과 우리나라의 기술수준은 저온이용분야인 온수급탕의 경우 실용화 수준이며, 산업용인 중고온분야는 기초 및 소비시장 확대에 의한 가격의 저렴화 및 정부의 지원정책으로 태양열에너지의 이용을 증대시킬 수 있을 것이다. 이어서 국내 일사량자원과 보급현황을 살펴본 후 대체에너지 기술개발 기본계획상의 중장기 목표와 각분야별 기술의 개요 및 특징을 소개하였다. 국제환경에 대응하면서 국내 태양열 이용 및 보급 확대를 위해서는 기술개발을 통하여 얻어진 결과들이 사장되지 않도록 경쟁성 확보 시점까지 지속적인 수요창출을 위한 경제성 확보를 위해 추가적인 보완연구, 실용화연구 및 실증시범연구 등이 필요하다.

• 한국신재생에너지학회:학술대회논문집
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• 한국신재생에너지학회 2009년도 추계학술대회 논문집
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• pp.417-417
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• 2009

The application of solar energy, in the field of alternative energy, was on the increase tendency. In the case of advanced nations, through continuous R&D, solar hot water heater with high efficiency has been used for the house and the industrial process on business, advanced nations were reached up the experimental stage of solar generation system. But, the actual circumstance of the domestic has been not accomplished the popularization of solar hot water heater and the settlement of it which is the fundamental stage of the solar energy usage. This trouble, the domestic was flooded with small enterprise for producing solar hot water heater, was caused by the popularization and the production without verification of performance. To supply the monitoring program for evaluating solar hot water heater, this research was purpose to improve the technical development of the enterprise for producing solar-heat hot-water-boiler and served as an aid for the enlargement and the popularization on solar energy.

• 한국태양에너지학회 논문집
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• 제27권2호
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• pp.61-69
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• 2007

The final energy consumption in the building sector in Korea represents almost 20% of the total energy consumption. Besides, Space heating and hot water generation in Korea are based on fossil fuels, with a serious environmental impact. Despite the popularity of simple solar domestic hot water systems, active solar space heating remains, for various reasons, marginal. And thus, the aim of this paper is to demonstrate potentialities of solar assisted space heating systems, both technically and economically. From this study found that the solar heating system with CPC solar collectors integrated the roof of a single-story residential building shares $50{\sim}55%$ of the annual heating load.

• 한국태양광발전학회지
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• 제6권1호
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• pp.45-55
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• 2020

Although Sri Lanka's current carbon footprint is much less compared to other developing countries, the country's existing and planned economic developments have raised the demand for power, resulting an increased GHG (Greenhouse gas) emission. GHG in Sri Lanka is emitted mostly by the burning of fossil fuels for energy generation including transport. However, the most effective way of reducing GHG emissions from the energy sector is to use renewable energy sources. Solar is in the top list of renewable resources that has much potential to use to meet the demand for electricity generation in the country. The purpose of this study is to evaluate the current status of solar power generation and opportunities, barriers for implementing the programs of solar energy in Sri Lanka. Literature reviews mainly used as the primary tool for this study. Sri Lankan government had set the targets for adding 200 MW to the national grid by 2020, and to increase up to 1000 MW by 2025 of solar electricity. To achieve these targets the prevailing barriers have to be considered.

• 한국신재생에너지학회:학술대회논문집
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• 한국신재생에너지학회 2006년도 춘계학술대회
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• pp.584-587
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• 2006

An energy generating greenhouse based on fluoropolymer envelope and fresnel lens is proposed. The outstanding properties of the fluoropolymer films make them very suitable for large scale solar applications. Extremely high optical transmission over the whole solar spectrum, combined with mechanical strength, and durability allows us to design a highly optimized greenhouses for both plant growing and energy generation. Systems such as photovoltaic triple junction cells are especially attractive since they have up to 35% efficiency with much less cell material when the sun beam is focused with concentrators such as fresnel lenses. Cooling such devices will enhance the efficiency and provide useful thermal energy that could be further utilized for various applications depending on the local demands. This article introduces the basic ideas and principles of the energy generating greenhouses as a first step towards the actual deployment of such systems under Korean environment.

• 한국멀티미디어학회논문지
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• 제25권11호
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• pp.1572-1581
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• 2022

Energy conversion to renewable energy is being promoted to solve the recently serious environmental pollution problem. Solar energy is one of the promising natural renewable energy sources. Compared to other energy sources, it is receiving great attention because it has less ecological impact and is sustainable. It is important to predict power generation at a future time in order to maximize the output of solar energy and ensure the stability and variability of power. In this paper, solar power generation data and sensor data were used. Using the PCC(Pearson Correlation Coefficient) analysis method, factors with a large correlation with power generation were derived and applied to the GAM(Generalized Additive Model). And the prediction accuracy of the power generation prediction model was judged. It aims to derive efficient solar power generation in the future and improve power generation performance.