• Current Photovoltaic Research
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• v.11 no.2
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• pp.44-48
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• 2023

In heterojunction technology (HJT) solar cells, low-temperature curing paste is used because the passivation layer deteriorates at high temperatures of 200℃ or higher. However, manufacturing HJT photovoltaic (PV) modules is challenging due to the weak peel strength between busbar electrodes and cells after soldering process. For this issue, the electrode thicknesses of the busbars of the HJT solar cell were analyzed, and the peel strengths between electrodes and wires were measured after soldering using an infrared (IR) lamp. As a result, the electrodes printed by the screen printing method had a difference in thickness due to screen mask. Also, as the thickness of the electrode increased, the peel strength of the wire increased.

• Current Photovoltaic Research
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• v.11 no.2
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• pp.49-53
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• 2023

Expanding the supply of BIPV is crucial to strengthening the competitiveness of the photovoltaic industry and achieving Nationally Determined Contributions through the zero-energy building mandatory policy. BIPV is a technology that integrates into the building envelope to generate electricity and provide functions as a building material. It is suitable for domestic environments with many high-rise buildings due to the narrow land area and urbanization. To expand the supply of BIPV, economics, safety, and aesthetics must be ensured. In this study, a color BIPV module with a color PET film applied as a front material was manufactured for aesthetic and economic feasibility. The relationship between power output and transmittance according to color was analyzed. By analyzing the power output of the module and the transmittance of the film, the wavelength band (transmittance reduction band) that has the greatest effect on efficiency was analyzed regarding the color of the film. The red film showed the narrowest transmittance reduction band and the lowest degree of decrease in transmittance, making it ideal for minimizing the efficiency decrease rate compared to existing ones.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.20 no.1
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• pp.224-235
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• 2019

The increase in the amount of energy used in the agricultural sector due to the expansion of agricultural machinery and greenhouse horticulture has caused a range of problems, such as an increase in the cost of input, such as heating costs and greenhouse gas emission. To overcome these problems, this study examined the current status of energy use in greenhouse horticulture as well as the change patterns of non-taxable oil and agricultural electricity, and reviewed the current status of the supply of renewable energy and energy saving facilities for agriculture. This study investigated the area of advanced and renewable energy and energy saving facilities implemented, applied the energy saving ratio of advanced and renewable energy and energy saving facilities, and determined the effects of renewable energy in the agricultural sector, such as increase in production, decrease in heating cost, reduction in Government financial expenditure, reduction in greenhouse gas emission, and oil substitution effect.

• Journal of Energy Engineering
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• v.23 no.4
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• pp.31-40
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• 2014

The Korean government made the 2nd Energy Basic Plan to achieve 11% of new and renewable energies distribution rate until 2035 as a response to cope with international discussion about greenhouse gas emission reduction. Renewable energies include solar thermal, photovoltaic, bioenergy, wind power, small hydropower, geothermal energy, ocean energy, and waste energy. New energies contain fuel cells, coal gasification and liquefaction, and hydrogen. As public and private investment to enhance the distribution of new and renewable energies, it is necessary to clarify the economic effects of the new and renewable energies sector. To the end, this study attempts to apply an input-output analysis and analyze the economic effects of new and renewable energies sector using 2012 input-output table. Three topics are dealt with. First, production-inducing effect, value-added creation effect, and employment-inducing effect are quantified based on demand-driven model. Second, supply shortage effects are analyzed employing supply-driven model. Lastly, price pervasive effects are investigated applying Leontief price model. The results of this analysis are as follows. First, one won of production or investment in new and renewable energies sector induces 2.1776 won of production and 0.7080 won of value-added. Moreover, the employment-inducing effect of one billion won of production or investment in new and renewable energies sector is estimated to be 9.0337 persons. Second, production shortage cost from one won of supply failure in new and renewable energies sector is calculated to be 1.6314 won, which is not small. Third, the impact of the 10% increase in new and renewable energies rate on the general price level is computed to be 0.0123%, which is small. This information can be utilized in forecasting the economic effects of new and renewable energies sector.

• The Magazine of the Society of Air-Conditioning and Refrigerating Engineers of Korea
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• v.39 no.1
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• pp.6-12
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• 2010

최근 국제적으로 유가의 불안정, 기후변화협약 대응, 녹색성장 등 국내외 환경변화에 따라 신재생에너지의 주용성이 새롭게 인식되고 있으며, 이에 따른 국내의 신재생에너지정책 추진현황과 향후 전망을 소개하고자 한다.

• 한국신재생에너지학회:학술대회논문집
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• 2011.05a
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• pp.140-140
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• 2011

Korea's RPS, which requires that power generation companies obtain a minimum percentage of their generation by using renewable energy, will take effect in 2012. Based on the first-year law enforcement, generation companies have to satisfy 2% of RPS compliance ratio in 2012. Then, the required RPS compliance ratio will increase up to 10% in 2022. Thus generation companies need to construct power plants that utilize various types of renewable energy sources such as PV and wind power. This work is aimed to analyze the cost of such a renewable power source in terms of capital cost, capacity factor, and fuel cost. We provide the analytical expectation on the renewable power generation cost of 2012 focusing on PV, onshore/offshore wind, fuel cell, and IGCC, which are focused by government policy.

• Proceedings of the KIEE Conference
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• 2015.07a
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• pp.519-520
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• 2015

본 논문에서는 최적화를 적용하여 독립형 마이크로그리드 내에서 신재생 발전원의 설치 비율을 산정한다. 계통과 독립되어 있는 마이크로그리드에서의 발전원을 신재생 에너지원인 풍력 및 태양광, 그리고 에너지저장장치(Energy Storage System, ESS)만으로 가정하여 마이크로그리드의 부하규모에 맞는 신재생 에너지 발전원의 비율을 제시한다.

• Magazine of the Korean Society of Agricultural Engineers
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• v.60 no.4
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• pp.25-32
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• 2018

• Proceedings of the KIEE Conference
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• 2015.07a
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• pp.535-536
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• 2015

장기적인 에너지 수급 불안정과 기후변화에 대응하여 지속 가능한 에너지 공급체계인 신재생 에너지의 이용은 1차 에너지 소비 절감을 위한 중요한 요소로 인식되어가고 있다. 이에 국내 총 에너지 소비량의 약 25%를 차지하는 건물 분야에서도 신재생 에너지원의 적용을 확대함에 따라 생산과 소비 최적화를 통한 효율적인 통합 운용 및 제어가 가능한 건물에너지관리시스템의 필요성이 부각되고 있다. 본 논문에서는 신재생 분산자원을 도입하여 건물에너지관리시스템을 구축 및 실증하고 그에 따른 에너지 절감효과를 분석하였다.

• Proceedings of the KIPE Conference
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• 2009.11a
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• pp.191-193
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• 2009

최근 국내 신재생에너지설비의 설치가 급증하고 있다. 전국적으로 신재생에너지원의 설비가 산재되어 있음에도 불구하고 관리 및 운영 시스템은 미비한 수준이다. 따라서 사후관리 체계 구축과 설비 이용률 향상을 목적으로 가동현황을 파악하여, 신재생에너지원의 효율적인 관리와 통합 운영을 위한 시스템이 필요하다. 이를 위해 본 논문에서는 통신 및 모니터링 기술기준에 제정된 공용규격에 따라 다수의 계측기와 데이터를 수집, 변환, 저장하고, 중앙서버로 데이터를 전송할 수 있는 시스템을 구현하여 더욱 효율적인 신재생에너지원의 운영을 돕는다. 본 시스템은 신재생에너지원의 계측기와 RS-232 혹은 RS-485를 이용한 하위통신을 하여 관리에 사용될 여러 정보를 수집하여 저장한다. 상위통신으로 PIRP(Platform Independent Reporting Protocol)에 맞는 데이터로 변환하여 중앙서버에 데이터를 보내게 된다. 또 한, 유저가 원한다면 중앙서버에서 과거의 데이터를 획득할 수 있도록 시스템을 구현하였다.