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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2017.1
- 수록면
- 103 - 112 (10page)
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초록· 키워드
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Application of the supercritical condition in reactor core cooling needs to be properlyjustified based on the extreme level of parameters involved. Therefore, a numerical studyis presented to compare the thermalhydraulic performance of supercritical and singlephasenatural circulation loops under low-to-intermediate power levels. Carbon dioxideand water are selected as respective working fluids, operating under an identical set ofconditions. Accordingly, a three-dimensional computational model was developed, andsolved with an appropriate turbulence model and equations of state. Large asymmetry invelocity and temperature profiles was observed in a single cross section due to localbuoyancy effect, which is more prominent for supercritical fluids. Mass flow rate in a supercriticalloop increases with power until a maximum is reached, which subsequentlycorresponds to a rapid deterioration in heat transfer coefficient. That can be identified asthe limit of operation for such loops to avoid a high temperature, and therefore, the use of asupercritical loop is suggested only until the appearance of such maxima. Flow-inducedheat transfer deterioration can be delayed by increasing system pressure or loweringsink temperature. Bulk temperature level throughout the loop with water as working fluidis higher than supercritical carbon dioxide. This is until the heat transfer deterioration, andhence the use of a single-phase loop is prescribed beyond that limit.
목차
등록된 정보가 없습니다.
참고문헌 (23)
참고문헌 신청
A. K. Yadav / 2012 / CFD analysis of a CO2 based natural circulation loop with end heat exchangers / Appl. Therm. Eng 36 : 288 ~ 295
A. K. Yadav / 2012 / CO2 based natural circulation loops: new correlations for friction and heat transfer / Int. J. Heat Mass Transfer 55 : 4621 ~ 4630
B. T. Swapnalee / 2012 / Steady state flow and static instability of supercritical natural circulation loops / Nucl. Eng. Des 245 : 99 ~ 112
B. Y. Tong / 2001 / Closed-loop pulsating heat pipe / Appl. Therm. Eng 21 : 1845 ~ 1862
D. E. Ruiz / 2015 / Dynamic stability of natural circulation loops for single phase fluids with internal heat generation / Chem. Eng. Sci 126 : 573 ~ 583
A. K. Yadav / 2012 / CO2 based natural circulation loops: new correlations for friction and heat transfer / Int. J. Heat Mass Transfer 55 : 4621 ~ 4630
B. T. Swapnalee / 2012 / Steady state flow and static instability of supercritical natural circulation loops / Nucl. Eng. Des 245 : 99 ~ 112
B. Y. Tong / 2001 / Closed-loop pulsating heat pipe / Appl. Therm. Eng 21 : 1845 ~ 1862
D. E. Ruiz / 2015 / Dynamic stability of natural circulation loops for single phase fluids with internal heat generation / Chem. Eng. Sci 126 : 573 ~ 583
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