[ Special Issue : Seoul Tech Capstone Design ]

Journal of the Korean Society of Manufacturing Technology Engineers - Vol. 27, No. 3, pp.262-270

ISSN: 2508-5107 (Online)

Print publication date 15 Jun 2018

Received 04 Apr 2018 Revised 01 Jun 2018 Accepted 04 Jun 2018

DOI: https://doi.org/10.7735/ksmte.2018.27.3.262

소형화된 피동응축용 냉각탱크 내 온도분포와 비등현상에 관한 실험적 연구

이원석^a ; 송환준^a ; 김정우^a ; 박창용^a^{, *}

An Experimental Study on Temperature Distribution and Boiling Phenomena in a Small-Scaled Passive Condensate Cooling Tank

Won-Seok Lee^a ; Whanjoon Song^a ; Jungwoo Kim^a ; Chang Yong Park^a^{, *}

aDepartment of Mechanical System Design Engineering, Seoul National University of Science and Technology, 232, Gongneung-ro, Nowon-gu, Seoul 01811, Korea

Correspondence to: ^*Tel.: +82-2-970-6360, Fax: +82-2-974-8270, E-mail address: cypark@seoultech.ac.kr (Chang Yong Park).

Abstract

An experimental study was conducted to investigate the water temperature distribution and saturated boiling phenomenon in a small-scale passive condensate cooling tank that is part of an emergency passive auxiliary feedwater system used in nuclear power plants. During the heating process using an electric heater inserted in the tank, the temperature of water was measured at 36 locations. Isothermal line contours were generated based on the experimental data. The contours indicated that the water above the heater location had a nearly uniform temperature due to free convection flow. Conversely, a strong temperature gradient was observed in the water below the heater location. The bubble departure diameters at the cylindrical heater surface were measured using images captured by a high-speed camera. The diameters were observed to be within the range of values predicted using existing correlations.

Keywords:

Boiling, Nuclear power plant, Passive auxiliary feedwater system, Passive condensate cooling tank, Stratification, Temperature distribution

Acknowledgments

본 연구는 서울과학기술대학교 교내학술연구비 지원으로 수행되었으며 이에 감사드립니다.

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