Experiment study on thermal behavior of a horizontal high-temperature heat pipe under motion conditions

Sun, Hedong; Liu, Xiao; Liao, Haoyu; Wang, Chenglong; Zhang, Jing; Tian, Wenxi; Qiu, Suizheng; Su, G.H.

doi:10.1016/j.anucene.2021.108760

Cited by 19 publications

(3 citation statements)

References 13 publications

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“…Heat pipe experiments usually focus on the investigation of operating limits [33][34][35][36][37][38], wick development and performance [39], startup transients [40,41], inclination angles [42][43][44], novel instrumentation [16,40,45], two-phase flow characteristics [46], and motion conditions [47]. This subsection discusses some of these different experimental approaches.…”

Section: Heat Pipe Experimental Methodsmentioning

confidence: 99%

Analyses Supporting Heat Pipe Experiments

Yilgor,

Sabharwall,

Hartvigsen

2023

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This internship report presents thermal analysis support aiding the development efforts of advanced reactor systems as a part of the Department of Energy Microreactor Program. The heat pipe microreactor (HPMR) is one such reactor concept where the heat from the reactor core is removed via passively operating heat pipes. Heat pipes have found numerous applications in many fields due to their simplicity, effectiveness, and reliability. The present work includes a review of heat pipe experiments and experimental techniques, ideation on experiments using the SPHERE test bed, identification of heat pipe phenomena of interest, and suggestions for future directions on heat pipe experiments. Hence, it directly supports the development of heat pipe microreactors (HPMRs).

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Section: Heat Pipe Experimental Methodsmentioning

confidence: 99%

Analyses Supporting Heat Pipe Experiments

Yilgor,

Sabharwall,

Hartvigsen

2023

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“…Experiments usually focus on various aspects of heat pipe operation, such as the investigation of operating limits [33][34][35][36][37][38], wick development and performance [39], working fluid fill ratio [35,[40][41][42], start-up transients [43,44], inclination angles [41,45,46], novel instrumentation [16,43,47], two-phase flow characteristics [48], and motion conditions [49]. This subsection discusses some of these different experimental approaches.…”

Section: Background On Heat Pipe Experimentsmentioning

confidence: 99%

Heat Pipe Cooled Microreactors

Yilgor,

Sellers,

Hartvigsen

et al. 2024

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Microreactor technologies are required to provide reliable carbon-free power generation in remote applications. The heat pipe cooled microreactor concept in particular offers notable advantages due to the passive operation of heat pipes enabling increased reliability and simplicity in a more compact form factor. There is a significant need for experimental work to aid and expedite the deployment of heat pipe microreactors due to their unique technological characteristics. Thus, there has been increased interest in heat pipe experiments by numerous institutions in order to support these efforts. The present work is a comprehensive review of heat pipe experiments, describing instrumentation, methods, phenomena of interest, and recent developments. In addition, legacy work on the operation of high-temperature heat pipes under irradiation is reviewed and discussed. Furthermore, the verification and validation efforts for the flagship heat pipe simulation code, Sockeye, are reviewed and requirements for future experiments are outlined. Finally, future directions are proposed for heat pipe experimentation.

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“…With the development of electronic equipment in miniaturization and high integration, high heat flux generation poses a greater challenge to the heat dissipation of equipment. There are various potential solutions that have been proposed as potential candidates for electronic cooling, such as impinging jet cooling technology [ 1 , 2 ], heat pipes [ 3 , 4 ], the application of porous materials which can provide a high heat exchange area to volume ratio [ 5 , 6 , 7 ], as well as microchannel heat exchangers. The use of microchannels is one of the most important solutions for the design of compact heat sinks for high heat flux removal.…”

Section: Introductionmentioning

confidence: 99%

Comparative Study of the Thermal and Hydraulic Performance of Supercritical CO2 and Water in Microchannels Based on Entropy Generation

Zeng

2022

Entropy

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The excellent thermophysical properties of supercritical CO2 (sCO2) close to the pseudocritical point make it possible to replace water as the coolant of microchannels in application of a high heat flux radiator. The computational fluid dynamics (CFD) method verified by experimental data is used to make a comparison of the thermal hydraulic behavior in CO2-cooled and of water-cooled microchannels. The operation conditions of the CO2-based cooling cases cover the pseudocritical point (with the inlet temperature range of 306~320 K and the working pressure of 8 MPa), and the water-based cooling case has an inlet temperature of 308 K at the working pressure of 0.1 MPa. The channel types include the straight and zigzag microchannels with 90°, 120°, and 150° bending angles, respectively. The analysis result shows that, only when the state of CO2 is close to the pseudocritical point, the sCO2-cooled microchannel is of a higher average heat convection coefficient and a lower average temperature of the heated surface compared to the water-cooled microchannel. The entropy generation rate of the sCO2-cooled microchannel can reach 0.58~0.69 times that of the entropy generation rate for the water-cooled microchannel. Adopting the zigzag structure can enhance the heat transfer, but it does not improve the comprehensive performance represented by the entropy generation rate in the sCO2-cooled microchannel.

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Experiment study on thermal behavior of a horizontal high-temperature heat pipe under motion conditions

Cited by 19 publications

References 13 publications

Analyses Supporting Heat Pipe Experiments

Analyses Supporting Heat Pipe Experiments

Heat Pipe Cooled Microreactors

Comparative Study of the Thermal and Hydraulic Performance of Supercritical CO2 and Water in Microchannels Based on Entropy Generation

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