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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2018.10
- 수록면
- 34 - 42 (9page)
- DOI
- 10.5293/kfma.2018.21.5.034
이용수
초록· 키워드
오류제보하기
Recently, large-scale air-cooled heat pipes have been considered for use in various passive cooling systems to protect against station black-out accidents at nuclear power plants such as the one that occurred at the Fukushima facility in 2011. This study examines the conceptual design of a fork-end heat pipe (FEHP) with a relatively large heat transfer area in the condenser for air cooling in comparison to the evaporator for heating in liquid water. FEHP uses water as a working fluid and consists of one water-heated evaporator tube and several air-cooled condenser tubes. To experimentally evaluate the heat transfer characteristics of the proposed FEHP design, a scaled-down model and a test facility were constructed. The evaporator of the scaled-down model was heated by circulating hot water while the fork-end condensers were cooled by atmospheric air at room temperature. Results of this design study indicated that as the circulating water temperature was increased, four different operational modes were observed in the evaporator in sequence: natural convection, geyser boiling, fully-developed nucleate boiling, and falling film boiling. The geyser boiling displayed mechanically and thermally unstable features due to the large quantity of explosive nucleations in the working fluid when it was superheated beyond the saturation temperature corresponding to the system pressure. The average heat transfer rate in the fully-developed nucleate boiling mode stably increased with increasing water temperature in the heating loop and converged towards a maximum value as the system approached the falling film boiling mode.
목차
ABSTRACT
1. 서론
2. 문헌조사
3. 실험장치 및 측정방법
4. 결과 및 토의
5. 결론
References
참고문헌 (13)
참고문헌 신청
[학술지(정기간행물)] - Xiong, Z. / 2014 / The Thermal Performance of a Loop-type Heat Pipe for Passively Removing Residual Heat from Spent Fuel Pool / Nuclear Engineering and Design 280 : 262 ~ 268
[학술지(정기간행물)] - Xiong, Z. / 2015 / Experimental Study on The Sub-atmospheric Loop Heat Pipe Passive Cooling System for Spent Fuel Pool / Progress in Nuclear Energy 79 : 40 ~ 47
[학술지(정기간행물)] - Mochizuki, M. / 2013 / Prevention Possibility of Nuclear Power Reactor Meltdown by Use of Heat Pipes for Passive Cooling of Spent Fuel / Frontiers in Heat Pipes (FHP) 4 (1) : 1 ~ 6
[학술지(정기간행물)] - Tian, F. Z. / 2013 / An Investigation of The Unstabel Oscillation Phenomenas of Two-phase Closed Thermosyphon / Advanced Materials Research 668 : 608 ~ 611
[단행본] - Faghri, A. / 1995 / Heat Pipe Science and Technology / Taylor & Francis
[학술지(정기간행물)] - Xiong, Z. / 2015 / Experimental Study on The Sub-atmospheric Loop Heat Pipe Passive Cooling System for Spent Fuel Pool / Progress in Nuclear Energy 79 : 40 ~ 47
[학술지(정기간행물)] - Mochizuki, M. / 2013 / Prevention Possibility of Nuclear Power Reactor Meltdown by Use of Heat Pipes for Passive Cooling of Spent Fuel / Frontiers in Heat Pipes (FHP) 4 (1) : 1 ~ 6
[학술지(정기간행물)] - Tian, F. Z. / 2013 / An Investigation of The Unstabel Oscillation Phenomenas of Two-phase Closed Thermosyphon / Advanced Materials Research 668 : 608 ~ 611
[단행본] - Faghri, A. / 1995 / Heat Pipe Science and Technology / Taylor & Francis
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