• Title/Summary/Keyword: solar thermal

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Solar Thermal Deployment During the 2nd Basic Renewable Period - The Prospect of Million Solar Roof Program : 2003-2012 in Korea - (제2차 신재생 기본계획과 태양열 보급목표 - 태양열 100만 호 달성 과연 가능한가 -)

  • Kim, Jong-Sun;Park, Geun-Seong
    • 한국신재생에너지학회:학술대회논문집
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    • 2006.11a
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    • pp.168-171
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    • 2006
  • The Korean Solar Thermal Industry hopes to realize 1 Million Solar Thermal Roofs. According to the 2nd Renewable Basic Plan : 2003-2012 the Government showed a very aggressive Solar Thermal Deployment Plan including Solar Thermal Apartment Housings Program. Owing to the Vision Statement such as Million Solar Thermal Roofs Program Korean Solar thermal Industry also can bring another shinny days Especially the more solar thermal applications such as to the Apartment Housings and Green Villages could bring a sustainable Solar Society Korea The RPA Program by the 9 Major Non-Private Energy Corporal ions and the RPS Program for the Solar Thermal Energy shall be another useful policy for the realization of Million Solar Korea era.

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Thermal Characteristics of Domestic Solar Collector for Low-Temperature Applications (국내 저온용 집열기의 열성능 특성)

  • Kim, Jeong-Bae;Rhie, Soon-Myeong;Yoon, Eung-Sang;Lee, Jin-Kook;Joo, Moon-Chang;Lee, Dong-Won;Kwak, Hee-Youl;Baek, Nam-Choon
    • Journal of the Korean Solar Energy Society
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    • v.27 no.3
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    • pp.155-160
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    • 2007
  • This study shows the results on thermal performance test with domestic solar collector for low-temperature applications using KS, then reveals the efficiency difference between KS and EN standard. Using the test results, this study Presents the status of thermal performance with domestic solar collector including flat-plate, single evacuated, and double evacuated (with mirror or U-tube) solar collector.

Analysis Thermal Performance of PV/Thermal Collector with Dye-sensitized Solar Cell Module (염료감응형태양전지 모듈 적용 PVT 집열기의 열적 성능 분석)

  • Jang, Han-Bin;Mun, Jong-Hyeok;Gang, Jun-Gu;Kim, Jin-Hui;Kim, Jun-Tae
    • Proceedings of the Korean Society for Emotion and Sensibility Conference
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    • 2009.11a
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    • pp.273-276
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    • 2009
  • Photovoltaic-thermal(PVT) collectors are a combination of photovoltaic modules with solar thermal collectors, forming one device that receives solar radiation and produces electricity and heat simultaneously. Of various PV modules, dye-sensitized solar cell(DSC) is a relatively new type of solar cell technology that can transmit light while they can generate electricity. With this aspect, DSC can be applied into solar thermal collectors. The object of this study is to evaluate the thermal performance of PVT collector with DSC. The thermal performance of the DSC PVT combind collector was measured in outdoor conditions with the solar radiation of over $700W/m^2$. In this study, the PVT collector with the 30% light transmittance of DSC achieved its thermal efficiency of about 36%.

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Analysis of Maximum Solar Radiation on Inclined Surfaces for the Installation of Solar Thermal Systems in Korea Using the Optimum Installation Angle (국내 태양열시스템 설치를 위한 시스템 최적 설치각 산출을 통한 최대 경사면일사량 분석)

  • Jo, Dok-Ki;Kang, Young-Heack
    • Journal of the Korean Solar Energy Society
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    • v.29 no.2
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    • pp.47-54
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    • 2009
  • The amount of incident rays over inclination according to direction has been widely utilized as important data m installing solar thermal systems. To optimize the incident solar radiation, the slope, that is the angle between the plane surface in question and the horizontal, and the solar azimuth angles are needed for these solar thermal systems. This is because the performance of the solar thermal systems in much affected by angle and direction of incident rays. Recognizing that factors mentioned above are of importance, actual experiment on the moving route of the sun have been performed in this research to obtain the angle of inclination with which the maximum incident rays can be absorbed. After all, the standard for designing highly optimized solar thermal systems will be provided for designers and employees working in the solar collector related industries.

A Characteristic Analysis on the Thermal Performance of the Dish Type Solar Concentrating System (Dish형 태양열 집광시스템 실증연구를 위한 집열성능 특성 분석)

  • Kang, Myeong-Cheol;Kang, Yong-Heack;Yoon, Hwan-Ki;Yoo, Seong-Yeon
    • Journal of the Korean Solar Energy Society
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    • v.26 no.1
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    • pp.7-12
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    • 2006
  • The dish type solar thermal concentrating system can collect the solar energy above $800^{\circ}C$. It has a concentration ratio of 800 and total reflector area of $49m^2$. 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.

Thermal Characteristics of Domestic Solar Collector for Low-Temperature Applications (국내 저온용 집열기의 열성능 특성)

  • Kim, Jeong-Bae;Rhie, Soon-Myeong;Yoon, Eung-Sang;Lee, Jin-Kook;Joo, Moon-Chang;Baek, Nam-Choon
    • 한국태양에너지학회:학술대회논문집
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    • 2008.04a
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    • pp.215-220
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    • 2008
  • This study shows the results on thermal performance test with domestic solar collector for low-temperature applications using KS, then reveals the efficiency difference between KS and EN standard. Using the test results, this study presents the status of thermal performance with domestic solar collector including flat-plate, single evacuated, and double evacuated (with mirror or U-tube) solar collector.

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A Study on the Thermal Performance of Solar Concentrating Cooker (집광형 태양열 조리기의 집열성능 평가 연구)

  • Kang, Myeong-Cheol;Kang, Yong-Heack;Yoon, Hwan-Ki
    • Journal of the Korean Solar Energy Society
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    • v.24 no.1
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    • pp.1-6
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    • 2004
  • To evaluate performance of concentrating solar cookers, we have designed and constructed parabolic solar cooker. Tests are carried out to define the performance characteristic of concentrating cookers under the ambient conditions. Performance and test of solar cooker were followed the international standard procedure that was proposed at the Third World Conference on solar cooking Stagnation temperature and water heating test are carried out to determine the maximum temperature attained by cooker and evaluate the thermal performance of the cooker, respectively.

The Performance and Efficiency Analysis of a PVT System Compared with a PV module and a Solar collector (PVT 시스템의 PV 모듈 및 태양열 집열기 대비 성능 및 효율 비교분석)

  • Euh, Seung-Hee;Lee, Jeong-Bin;Choi, Yun-Sung;Kim, Dae-Hyun
    • Journal of the Korean Solar Energy Society
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    • v.32 no.2
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    • pp.1-10
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    • 2012
  • A photovoltaic/thermal (PVT)solar system is the solar technology that allows for simultaneous conversion of solar energy into both electricity and heat. This paper compared the performance of PVT system with a conventional PV module and solar collector and analyzed electrical and thermal efficiency of PVT system in terms of solar irradiance and inlet temperature of the working fluid. Based on the experimental data, thermal and electrical efficiencies of he glazed PVT system were57.9% and14.27% under zero reduced temperature condition which were lower by 13.6% than the solar thermal absorber plate and by 0.08% than the PV module respectively. For the unglazed PVT system it had lower thermal efficiency than the solar thermal absorber plate but higher electrical performance than the PV module due to the cooling effect by the working fluid. However, total efficiency of the glazed PVT system was72.2% which was higher than combined efficiencies of the solar collector and PV module. Besides, total efficiency of the PVT system would be much higher if calculated based on unit area.

An Experimental Study on the Thermal Characteristics of Hybrid Solar Receiver for Dish/Stirling System (Dish/Stirling 시스템 적용을 위한 Hybrid 태양열 흡수기의 열특성에 관한 실험 연구)

  • Kang, Myeong-Cheol;Kim, Jin-Soo;Kang, Yong-Heack;Kim, Nack-Joo;Yoo, Seong-Yeon;Kim, Jin-Heack
    • Journal of the Korean Solar Energy Society
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    • v.27 no.3
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    • pp.7-13
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    • 2007
  • A Dish type solar concentrating system consists of a parabolic concentrator and a cavity receiver. In order to achieve high temperatures from solar energy, it is essential to efficiently reflect the solar rays in the concentrator and to minimize thermal losses in the cavity receiver. Improving the economical efficiency of a solar power system required the stirling unit to be operated continuously. For continuous operation of the stilting unit, the receiver must be continuously provided with thermal energy from solar as well as additional combustion heat. It is possible for a hybrid solar receiver system equipped with an additional combustion to be operated 24 hrs/day. A hybrid solar receiver was designed and manufactured for a total thermal load of 35 kW in the operating temperature range $700^{\circ}C$ to $800^{\circ}C$. The hybrid receiver system was tested in gas-only mode by gas-fired heat to investigate thermal characteristics at inclination angle varying from 0 deg to 30 deg(cavity facing down) and the aperture to cavity diameter ratios of 0(closed cavity) and 1.0(open cavity). This paper has been conducted to measure temperature distribution in cavity surface and to analyze thermal resistances, and the evaporation and condensation heat transfer coefficient in all cases(open and closed cavity).

Solar Thermal Hybrid Power Generation: technology overview and state of the art in Korea (태양열 복합발전기술의 개요와 국내 연구개발 현황)

  • Kim Jin-Soo;Kang Yong-Heack;Lee Sang-Nam;Yoon Hwan-Ki;Yu Chang-Kyun
    • 한국신재생에너지학회:학술대회논문집
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    • 2005.06a
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    • pp.412-415
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    • 2005
  • Solar thermal power generation is one of promising and well-proven ways to convert solar energy to electricity. Though it requires high initial cost for system construction and continuous efforts for maintainment. it is more positive in terms of efficiency than other solar power generation technologies. Moreover, solar thermal power generation allows additional benefits of cheap thermal storage and easy hybridization with other fossil fuel-driven power generation. Owing to these benefits, large scale solar thermal power generation technology is expected to be competitive to other commercial technologies in the near future. In this paper an overview on the solar thermal hybrid power generation technology and the state of the art in Korea were briefly introduced.

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