• Journal of Energy Engineering
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• v.27 no.4
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• pp.20-26
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• 2018

As the global warming due to greenhouse effect has become serious problem, it is necessary to introduce the technology, for instance, such as diversity or saving of energy to reduce the use of fossil fuel. The purpose of this study was to investigate the characteristics on materials of absorption plate, unpowered and minimum use of power in cooling and heating combined device. As the results, it was observed that, in case of summer, since temperature of absorption device of solar heat(ADSH) was lower than that of no ADSH, cooling effect was insignificant in case of being not installed cold-reservoir. However, in case of winter, heating effect was certified even though the power was not used. At secondhand, the performance of ADSH with Cu was higher 2 times than that of ADSH with Al.

• Proceedings of the Korean Society for Agricultural Machinery Conference
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• 2003.07a
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• pp.384-389
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• 2003

전기가 공급되지 않는 농경지에 물을 공급하기 위해 태양열을 동력원으로 하고 저온에서 비등하는 물질을 작동물질로 하는 물펌프가 연구되어 왔다. 이와 관련하여 김 등(2002, 2003)은 펜탄을 작동물질로 한 태양열 물펌프 연구에서 에너지변환실험, 작동사이클의 열역학적인 해석, 장치의 설계를 수행한 바 있다. 본 연구에서는 펜탄을 작동물질로 한 태양열 물펌프를 실현하기 위하여 기존의 설계를 바탕으로 실험장치를 제작, 실험, 분석하였다. (중략)

• The Journal of the Korea institute of electronic communication sciences
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• v.11 no.4
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• pp.411-420
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• 2016

Efforts have continued in recent years to research and develop new alternative energy sources to replace coal and oil. These days interest is exploding in new pollution-free renewable energy due to the rising prices of finite energy sources. In the field of solar energy, one of new renewable energy that has been actively researched and commercialized, research efforts have been focused on solar light energy, whose efficiency has, however, reached a saturation point already. Thus, this paper proposed a solar tracking-type parabolic heat collection device to utilize solar thermal energy rather than solar light energy. The proposed device was designed in a parabolic form to collect solar heat effectively. The investigator made its prototype by incorporating a five-axis censor-based solar tracking technology in it to sense changes to the location of the sun according to the seasons and periods. In addition, an administrator interface was designed and implemented for the efficient management of heat collection device.

• Proceedings of the Korean Society for Agricultural Machinery Conference
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• 2002.07a
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• pp.267-272
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• 2002

자연에너지이면서 자원이 풍부한 태양에너지를 동력으로 변환하여 얻어진 기계적인 일을 이용하여 물 펌프를 구동하면 이 장치는 물이 매우 필요한 때인 여름철의 경우 그 동력원인 태양열이 강하기 때문에 아주 이상적인 장치라고 할 수 있다. 이 장치는 특히, 전기가 잘 공급되지 않는 농촌의 경우 아주 유용하게 사용될 수가 있을 것이다. (중략)

• Proceedings of the Korean Society for Bio-Environment Control Conference
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• 1998.05a
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• pp.61-67
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• 1998

1973년과 1978년의 1,2차 Oil Shock로 인하여 정부는 대체에너지 개발을 입법화하여 태양열의 이용을 촉진시켜왔다. 그 후 약 20년간 태양열 이용에 대한 효과적인 집열과 축열기술의 개발에 연구가 추진되었으며, 집열판(Flat-plate collector)의 개발과 열교환기, 축열장치의 설계 등 효율향상을 통하여 건축의 난방, 온수급탕 등이 주종을 이루었다. (중략)

• Korean Journal of Food Science and Technology
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• v.11 no.1
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• pp.8-12
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• 1979

A cylindrical solar energy focusing collector constructed using aluminum-laminated film plastered on the acrylic plate and examined its performances under the Korean local weather conditions. The reflector surface of this collector· evidenced the reflectivity of 66.1%,which was satisfactory value that could be applicable to the solar collector for its low price and at·availability. Collector efficiency measured at the heat exchanger fluid in absorber-copper pipe black colored was 73% and the resulting natural convection of the heat transfer media (water) was recorded up to 2.82 cm/sec. The overall efficiency of the solar heater in operation was 28.6% and it was correlated with the solar energy input and the temperature elevation difference gained.

• Journal of Energy Engineering
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• v.21 no.4
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• pp.356-361
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• 2012

Recently, even though the researches on renewable energy like geothermal, wind, solar energy have been performed widely, its use-rate in total energy is still low. This study was carried out to investigate the performance of hybrid heating system, which consisted of solar collector of thermosyphon tube type and X-L pipe boiler. Especially, new type of solar collector was tried and compared with double tube type and, futhermore, performance and safety on X-L pipe boiler were investigated. As the results, efficiency of solar collector of thermosyphon tube type was higher 20.7% than that of double tube type, mainly due to its structural characteristics. It was also confirmed that temperature of special heat medium used X-L pipe boiler rose up about 20% rapidly in comparison with that of pure water.

• Journal of Korean Ophthalmic Optics Society
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• v.13 no.4
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• pp.75-81
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• 2008

Purpose: To develop a solar concentrator having the reflecting surface with the 2m class diameter. Methods: In order to make the reflecting surface for the solar concentrator, the shape of the reflecting surface sector is required. So, first, we induced the formula that can produce this shape. After that, using Delphi 6.0 language, we developed a program which uses this formula and produces the shape and the numerical data of the reflecting surface sector with the input variables such as the external diameter of the reflecting mirror, the reflecting mirror's radius of curvature at the paraxial range, the number of reflecting mirror sector, the size of the center hole of the reflecting mirror, and the interval of the output data. Results: This program, which was developed to produce the shape and the numerical data of the reflecting surface sector, enables us to see the shape of sector on the monitor and to save the numerical data files for the shape of sector. As a result, the user of this program can easily access the numerical data of the reflecting surface sector. Conclusions: Developing the program which produce the reflecting surface sector used to make the reflecting surface of the solar concentrator, we could succeed in making the prototype products by applying it to the development of the real solar concentrator with the diameter of the 2m class.

• Environmental engineer
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• s.323
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• pp.86-95
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• 2013

본 발명은 해수의 담수화 장치에 관한 것으로, 해수를 증기와 온수로 변환하도록 태양열을 이용하여 상기 해수를 가열하는 가열기와, 상기 가열기에 의해 변환된 상기 증기와 상기 온수를 분리하는 분리기를 포함하며, 상기 가열기는, 오목한 곡면을 갖는 반원통 형상으로 마련되고, 상기 반원통 형상의 길이방향을 따라 위치하는 다수의 초점을 향하여 내면으로 조사된 태양광을 반사하는 반사렌즈 및 상기 반사렌즈에 의해 반사된 상기 태양광의 열 에너지에 의해 상기 해수를 가열하도록, 상기 반사렌즈의 초점이 위치하는 길이방향의 지점을 따라 상기 해수가 흐를 수 있도록 형성되는 유로관을 포함하는 것을 특징으로 한다.

• Journal of the KSME
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• v.17 no.1
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• pp.23-27
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• 1977

태양열을 냉방에 이용하기 위한 시스템은 집열기,열교환기,냉동기 등으로 구성된다. 집열기는 난 방시와 마찬가지로 볼 때 냉난방을 병용하는 집열기를 사용하면 유리하다. 열교환기는 집열기에 서 수집한 열을 냉방기에 전달시키는 기능을 가지는데 용도에 따라 이것을 사용하지 않는 경우도 있다. 냉동기로는 보통 흡수식 냉동기를 사요하나 그외 개방식, 분사식 등의 냉동기도 사용된다. 그러나 분방식 냉동기는 취급은 용이하나 흡수제의 재생조건이 까다로워 높은 습기를 갖는 경우 재생온도가 역시 높아져야 하므로 우리나라의 경우에는 여름철의 습도가 높기 때문에 재생온도가 높아져야 하므로 태양열 냉방에는 부적당하다. 또 분사식 냉동기의 경우 성적계수(Coefficient of Performance) 가 다른 냉동기에 비해 낮고 증기압력이 낮으면 이것이 극히 낮아지기 때문에 태양 열 냉방에 많이 사용하지 않는다. 그래서 태양열 냉방에 있어서 냉동기는 거의 흡수식을 사용하 고 있으며, 여기에서도 주로 흡수식 냉동기를 사용한 냉방에 대하여 논하고져 한다.