Experimental evaluation on heat transfer limits of sodium heat pipe with screen mesh for nuclear reactor system

Tian, Wenxi; Zhang, Jiarui; Wang, Chenglong; Guo, Kailun; Liu, Yu; Zhang, Dalin; Tian, Wenxi; Qiu, Suizheng; Su, G.H.

doi:10.1016/j.applthermaleng.2022.118296

Cited by 40 publications

(10 citation statements)

References 25 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%

“…Due to the different physical phenomena that are in effect for the different operating limits, indirect methods must often be used to determine which limit is reached. The operating limits are usually characterized by an abrupt increase in the overall thermal resistance of the heat pipe [24,35]. The power at which the limit is reached can usually be determined based on temperature measurements.…”

Section: Operating Limitsmentioning

confidence: 99%

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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%

Section: Operating Limitsmentioning

confidence: 99%

Analyses Supporting Heat Pipe Experiments

Yilgor,

Sabharwall,

Hartvigsen

2023

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“…According to the above formula, it can be known that the heat transfer performance of a heat pipe is affected by factors such as the type of working fluid, geometric shape, suction core structure, and inlet and outlet temperature of the heat pipe. By further improving the manufacturing process of heat pipes and optimizing the design of new types of heat pipes, the heat transfer limit of core heat pipes can be enhanced [22] , thereby enhancing the heat transfer capacity and operating power of heat pipe reactors. Under certain conditions, the number of heat pipes was positively correlated with thermal power.…”

Section: Manufacturing Process Of Heat Pipe Stack and Challenges In H...mentioning

confidence: 99%

Preliminary Study on the Application of Heat Pipe Reactor in Unmanned Underwater Vehicles

Zhao,

Chen,

Sheng

et al. 2024

E3S Web Conf.

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At the beginning of the 21st century, due to the re-proposal of the United States space exploration program, heat pipe reactors once again received widespread attention from researchers. With their long lifespan, high energy density, and inherent safety features, they exhibit promising prospects for application in space nuclear reactors, land-based mobile nuclear power sources, and deep-sea unmanned equipment exploration. Consequently, they represent an ideal novel energy source for unmanned underwater vehicles (UUVs). This article selected the SUBOFF submarine model as a basis to calculate UUVs’ navigation resistance at various speeds using the 1+k method. By comparing the converted UUVs navigation power demand with that of traditional batteries and heat pipe stacks’ output power, it was concluded that heat pipe reactors offer superior power supply and endurance capabilities. Subsequently, based on the structural characteristics of the heat pipe stack, this study summarized battery advantages and characteristics while also addressing construction and development aspects of heat pipe stack energy systems. Furthermore, the key technologies that need to be overcome in the application of heat pipe stacks in UUVs are introduced. Through the formula of heat transfer limit of heat pipe, the factors that limit the heat transfer performance of heat pipe are analyzed, and the positive correlation among the number of heat pipe, heat transfer limit and heat transfer power was obtained. Finally, the challenges faced by the future application of heat pipe stacks in UUVs were pointed out.

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“…Previous studies on the heat pipe consist of fundamental analyses related to material compatibility and heat and mass transfer process. 3 Several models and simulation methods of heat pipes have been presented. Different from the classical network thermodynamic model simplifying the flow process of the working fluid, Tian et al 4 improve the network thermodynamic model by considering the effect of vapor flow.…”

Section: Introductionmentioning

confidence: 99%

Single/ multi‐objective optimization and comparative analysis of liquid‐metal heat pipe

Tian

Liu

Wang

et al. 2022

Intl J of Energy Research

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Heat pipes utilize the latent heat of vaporization and lie on the capillary forces to maintain the circulation of working fluid. High-temperature heat pipes applied in the nuclear silent thermal-electrical reactor are investigated and optimized. Nine wick structures and several design variables are investigated in the single/multi-objective optimization. The improved network thermodynamic model of a heat pipe is adopted, and the thermal resistance, mass, and transport capacity of wicks are selected as the objective functions. Multiobjective optimization results are obtained by Pareto-optimal points.Comparative results reveal that mesh screen and annular artery present a better performance (0.00180 K/W) in both single and multiple objective optimizations. Potassium is preferred for the wick of the circular artery and rectangular artery, while sodium is preferred for the wick of isosceles-triangular groove and sintered fibers. And with the operating temperature (800 ~950 K), thermal resistance is decreased with the simultaneous rise of mass (165.2%) and transport capacity (154.6%) in the mesh screen. This work makes it possible to improve the operational performance of a heat pipe and provides a reference for the selection of wick structure and heat pipe design.

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Experimental evaluation on heat transfer limits of sodium heat pipe with screen mesh for nuclear reactor system

Cited by 40 publications

References 25 publications

Analyses Supporting Heat Pipe Experiments

Analyses Supporting Heat Pipe Experiments

Preliminary Study on the Application of Heat Pipe Reactor in Unmanned Underwater Vehicles

Single/ multi‐objective optimization and comparative analysis of liquid‐metal heat pipe

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