• 설비공학논문집
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• 제14권8호
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• pp.664-670
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• 2002

A heat sink (HS) system using heat pipes for electronics systems was studied. The experimental results indicate that a cooling capacity of up to 150w at an overall temperature difference of $50^{\circ}C$ can be attainable. The heat sink design program also showed that a computer simulation can predict the most of the parameters involved. To do so, however, the interior temperature distribution had to be verified by experimental results. The current simulation results were close to the experimental results in acceptable range. The simulation study showed that the design program can be a good tool to predict the effects of various parameters involved in the optimum design of the heat sink.

• 에너지공학
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• 제20권1호
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• pp.26-29
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• 2011

일반적인 냉각 과정에 적용되는 이차 냉매로서 아이스슬러리 적용 기술이 최근 개발되고 있다. 아이스슬러리는 액체와 거의 동일한 특성을 가지고 있고, 단위 체적당 아이스슬러리의 에너지용량이 얼음 입자의 잠열로 인해 냉각수나 브라인에 비해 상당히 높지만 파이프를 통해서 잘 유동시킬 수 있다. 아이스슬러리를 적용하는 냉각시스템의 설계를 위한 기초 결과를 제시하기 위하여, 쇼케이스의 냉각 코일에 아이스슬러리를 적용하는 실험을 수행하였다. 냉각 코일 입구에서의 아이스슬러리의 온도가 R22에 비하여 적어도 $5^{\circ}C$ 정도 높지만, R22를 적용하는 냉각시스템에 비하여 동등한 열적 성능을 가지고 있었다.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2007년도 춘계학술대회B
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• pp.2438-2443
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• 2007

In order to guarantee the performance of electronic products. It is needed to improve the cooling performance of heat sink. So this paper has been made to investigate the cooling performance for the aluminum heat sink using pulsating heat pipe(PHP). The pulsating heat pipe was used as a heat spreader. Working fluid was R-22. Heater (50 mm ${\times}$ 50 mm ${\times}$ 3mm) was attached to heat sink and it generated 30W, 60W, 80W, 100W. Heat sink was tested for forced convection with 1${\sim}$4m/s of inlet air velocity. And both type heat sinks were carried out by using CFD simulation. This study showed that pulsating heat pipe can be a good tool to improve cooling performance of heat sink.

• 설비공학논문집
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• 제10권2호
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• pp.137-146
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• 1998

The experimental study is concerned with two-phase closed thermosyphons, (i.e., wickless heat pipes) for the cooling of high power electronic components in telecommunication system. The thermosyphon which can deal with a high heat flux of up to $4.9W/cm^2$ is developed, and the cooling characteristics of thermosyphon is analyzed according to design parameters which are the types of and quantity of working fluid, number of pipes, wire insertion in pipe, inclination angle of thermosyphon, and cooling air velocity. Using water as working fluid is superior cooling performance compared to using acetone, and cooling performance is improved as the number of thermosyphon becomes larger, inserting wires in the pipes, and inclination of $30~60^{\circ}$.

• 대한설비공학회:학술대회논문집
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• 대한설비공학회 2009년도 하계학술발표대회 논문집
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• pp.1385-1390
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• 2009

In this study the purpose is development of passive cooling system for telecommunication cabinet used by latent heat material. This cooling system is not required for electronic power. It was tested for the performance of the telecommunication combined latent heat material with $48^{\circ}C$ of phase changed temperature and heat pipe. At $45^{\circ}C$ of outside temperature, when heater power was 1,000 W and 1,500 W, the inside temperature of the cabinet was $55^{\circ}C$ and $62^{\circ}C$. This system was showed better performance than the other systems.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2000년도 춘계학술대회논문집B
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• pp.162-167
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• 2000

Construction machinery includes an engine enclosure separated from a cooling system enclosure by a wall to reduce noise and advance cooling system performance. For this structure, however, the axial fan cannot be of benefit to the engine room, and so the temperature rise in the engine room makes several bad conditions. This paper proposes that hot air in engine room is evacuated tv secondary pipe using jet pump. This paper demonstrates the structure and the effect of jet pump and useful guideline on design of area, length, and shape of secondary pipe to maximize the effect of jet pump.

• 한국우주과학회:학술대회논문집(한국우주과학회보)
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• 한국우주과학회 2009년도 한국우주과학회보 제18권2호
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• pp.50.2-50.2
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• 2009

지구관측위성의 광학탑재체 내부에 장착된 초점면결상장치(FPA, Focal Plane Assembly)는 영상촬영시 많은 열을 발생하며, 최상성능획득을 위해서는 온도가 좁은 온도범위 내에서 유지되어야 한다. 초점면결상장치가 짧은 시간 동안 많은 열을 발생할 때, 이를 효과적으로 냉각시키기 위해 보통 히트파이프와 복사방열판을 이용한다. 이번 연구에서는 초점면결상장치의 최대상승온도를 낮추고, 영상촬영대기시 최적온도유지를 위한 히터작동율을 낮추기 위해 초점면결상장치와 복사방열판 사이에 열완충질량(TBM, Thermal Buffer Mass)을 적용하였는데, 이를 통해 얻을 수 있는 열설계 개선효과에 대해서 기술한다.

• 교육시설 논문지
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• 제18권3호
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• pp.35-41
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• 2011

Performance of a small-capacity solar absorption cooling system was investigated experimentally. Ten sets of evacuative-tube solar-heat collectors and a 5 kW single-stage absorption cooler were combined to produce a hybrid cooling system. The performance of the cooling system was measured using a tim-coil unit installed in a small plastic storage. It was found from the test on a sunny day of May that when the temperature of the hot water supplied from the solar collectors to the generator of the absorption cooler reached $60^{\circ}C$, the absorption cooler started cooling and the cold water temperature measured from the fan-coil unit reached $18^{\circ}C$. The COP, which is defined as the ratio of the cooling power to the total electrical power input was higher than 1.0.

• 과학과기술
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• 제19권1호통권200호
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• pp.48-57
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• 1986

- DATA파이프 - 화학품 생산을 위한 바이오매스의 이용 - 선형 프로그래밍 산법 - 복합질병을 위한 왁찐 - 말라리아 왁찐 - 데이터 기록용의 확장식 디스크매체 - 생세포의 냉동보존용 전산화 시각분석법 - 콜버그완 - 중유회수의 능률향상 - 충돌 들뜸체계이용 소프트 X선 레이저 - 스터얼링 사이클 저온 냉각기 - 셀데인 - 플라즈마 체계이용 소프트 X선 레이저 - 수력터빈 시스템 - 암호시스템을 해독하는 산법 - 균일한 크기의 극히 미세한 물질을 형성하는 공정 - 마그네켄치 - 리그닌 퇴화효소 - 코즈믹 튜브 - 테라비트 Km/Sec용량의 광전송 - 폴리머-세라믹 복합체 - 노바 - 살아있는 뇌의 신경 수용체를 보고 측정하는 방법

• 대한설비공학회:학술대회논문집
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• 대한설비공학회 2005년도 하계학술발표대회
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• pp.126-126
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• 2005