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RISS 인기검색어
- 검색키워드
- 저자 : 바트세이칸뭉크밧(Batsaikhan Munkhbat) (검색결과 4 건)
- 무료
- 기관 내 무료
- 유료
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바이패스라인을 가지는 히트파이프의 열전달 성능에 관한 연구
바트세이칸뭉크밧(Batsaikhan Munkhbat),김영수(Youg-Su Kim),송민수(Min-Su Song),정의국(Eui Guk Jung) 대한기계학회 2020 대한기계학회 춘추학술대회 Vol.2020 No.12
The experimental work was conducted on heat pipe connecting the evaporator and condenser end with a liquid bypass line. The liquid bypass line was designed to extend the maximum thermal of the heat pipe. The heat pipe with a total length of 750 mm are made of aluminum material. the evaporator and condenser are the same as 200 mm in length, and the adiabatic length is 350 mm. The inner diameters of the heat pipe and bypass line were 15.88 mm and 6.35 mm, respectively. Acetone was used as working fluid. In this experimental work, the effect of the bypass line on heat transfer performance of the heat pipe is to be presented. The maximum thermal load of the heat pipes with and without the liquid bypass line were analyzed and compared with each other, under tilt angles of 0° to 20°. Typical results showed that the maximum thermal load was increased by approximately 35.5% on horizontal arrangement.
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바이패스라인에 의한 히트파이프의 최대열전달 성능향상에 관한 연구
바트세이칸뭉크밧(Batsaikhan Munkhbat),세렌토르즈간프렙(Tserendorj Ganpurev),정의국(Eui Guk Jung) 대한기계학회 2021 대한기계학회 춘추학술대회 Vol.2021 No.11
Dryout prevention is an important index of heat pipe performance. The balance between the capillary pressure supplied by the wick structure of a heat pipe and the flow resistance of the liquid returning to the evaporator determines the maximum heat transfer rate under which a steady state can be maintained. The maximum heat transfer rate is referred to as the capillary limit. If the heat pipe operates at a certain thermal load exceeding the capillary limit, then the onset of dryout in the wick structure occurs at the starting point of the evaporator and expands throughout the entire heat pipe over time. In this study, a bypass line for accelerating working fluid was first devised in order to improve the dryout prevention performance during heat pipe operation. The bypass line is designed so that a part of the working fluid can be bypassed without passing through the capillary structure by connecting the evaporator and the condenser. The liquid bypass line has the effect of increasing the maximum heat transfer rate of the heat pipe because it can increase the thermal load that can cause dryout by reducing the flow resistance of the working fluid on the phase change interface. Acetone was used as the working fluid. The effect of the bypass line on the heat transfer performance of the heat pipe was experimentally investigated. The maximum heat transfer rates of the heat pipe with and without the liquid bypass line were analyzed and compared at tilt angles of 0° to 20°. The results show that the maximum heat transfer rate was increased by approximately 35.5% using a horizontal arrangement.
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바이패스라인을 가지는 히트파이프의 정상상태 열전달 성능 향상에 관한 연구
세렌토르즈간프렙(Tserendorj Ganpurev),바트세이칸뭉크밧(Batsaikhan Munkhbat),정의국(Eui Guk Jung) 대한기계학회 2021 대한기계학회 춘추학술대회 Vol.2021 No.11
This study investigates the start-up and steady-state heat transfer performance of a heat pipe with a bypass line for accelerating a working fluid. The interface resistance by the counterflow of vapor and liquid under the operation of a heat pipe has a significant effect on the heat transfer performance. An experimental study was conducted on the thermal performance improvement of a heat pipe, which was induced by a reduction in the flow resistance above the phase interface with a counterflow. A heat pipe was connected to the evaporator start and condenser end with a liquid bypass line. The liquid bypass line was first designed to improve the steady-state heat transfer performance of the heat pipe by bypassing a portion of the liquid inside the condenser to the evaporator without passing through the capillary structure. Acetone was used as the working fluid, and the effect of the bypass line on the heat transfer performance of the heat pipe was experimentally investigated. The input thermal load, coolant temperature, and inclination of the heat pipe were selected as the experimental variables. The heat transfer performance of the heat pipe was evaluated by the thermal resistance, and the normal operation mode and bypass operation mode were quantitatively compared. When the bypass line was used, the thermal resistance of the heat pipe decreased by up to a maximum of 61%.
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고 열유속 하에서 바이패스라인을 가지는 루프히트파이프의 정상상태 열전달 성능에 관한 실험적 연구
김영수(Youg-Su Kim),바트세이칸뭉크밧(Batsaikhan Munkhbat),양성규(Sung-Gyu Yang),정의국(Eui Guk Jung) 대한기계학회 2020 대한기계학회 춘추학술대회 Vol.2020 No.12
An experimental study was conducted toward improving the steady-state thermal performance of a loop heat pipe (LHP) under high heat fluxes. An auxiliary loop (or bypass line) was installed between the vapor channel of the evaporator and the liquid reservoir to control the thermal performance of the LHP. A control valve was installed to the center of the bypass line to enable switching between the normal and bypass line operation modes. The LHP evaporator had a flat structure with vapor passages consisting of inverted trapezoidal grooves. Sintered metal wicks fabricated from stainless steel were used as the capillary structures in this study, and distilled water as the working fluid. The plane of the evaporator and condenser was 50 mm long and 40 mm wide, while the working fluid transport tube was of length 0.5 m. Experiments were performed to investigate the steady-state performance of the LHP with the auxiliary loop under thermal loads of 100–260 W. Typical results showed that the wall temperature was decreased by approximately 45°C, resulting in reduction of the LHP thermal resistance by up to 28.1%.
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