☆ 4.7 Article

Experimental study on the thermo-hydrodynamic characteristics of a nitrogen pulsating heat pipe

INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER (2023)

相关参考文献

注意：仅列出部分参考文献，下载原文获取全部文献信息。

Article Thermodynamics

Visualization study on the flow characteristics of a nitrogen pulsating heat pipe

Sizhuo Li et al.

Summary: An experimental setup for visualizing a nitrogen pulsating heat pipe (PHP) was developed. The PHP, fabricated using MEMS technology, has a hydraulic diameter of 667 μm and overall dimensions of 70 x 25 x 2 mm³. Six different filling ratios (FRs) ranging from 15% to 94% were measured using visualization images, with the PHP failing to start-up only at a 15% FR. Flow images of nitrogen PHPs were obtained for the first time, revealing four flow patterns. The variations of flow characteristics and fluid motion with heat loads and FRs were analyzed, and the fluid motion diagram and flow pattern proportion were extracted from the visualization results. The study found that large amplitude oscillating motion is rarely observed in the nitrogen PHP, and annular flow dominates in low and medium FR working conditions, suggesting that the one-dimensional slug flow model may have a limited application range for the flat-plate nitrogen PHP.

INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER (2023)

添加到收藏夹

Article Thermodynamics

Experimental study on a hydrogen pulsating heat pipe in different heating modes

Sizhuo Li et al.

Summary: The temperature curves of a hydrogen pulsating heat pipe (PHP) in two different heating modes (stepwise heating and sudden heating) were experimentally obtained to understand its heat transfer performance. The experimental results showed that the differences in quasi-steady-state temperatures and effective thermal conductivities between the two heating modes were negligible, indicating reproducible stable heat transfer performance of the PHP in different heating modes.

CRYOGENICS (2022)

添加到收藏夹

Article Thermodynamics

Numerical study of single-loop pulsating heat pipe with porous wicking layer

Zhanxiao Kang et al.

Summary: In this study, a numerical model of WPHP was built to investigate the effects of wicking layer property and inclination angle on the heat pipe thermal performance. The results showed that the wicking layer could enhance the thermal performance of the heat pipe at certain filling ratios, but performed worse than traditional heat pipe at low filling ratio.

INTERNATIONAL JOURNAL OF THERMAL SCIENCES (2022)

添加到收藏夹

Review Thermodynamics

Flat plate pulsating heat pipes: A review on the thermohydraulic principles, thermal performances and open issues

Vincent Ayel et al.

Summary: Thermal management of modern micro- and high-power electronic systems is becoming increasingly challenging due to trends in miniaturization and heat generation. Pulsating heat pipes have attracted growing interest as passive heat transfer devices with high reliability and diverse applications, distinct from traditional heat pipes. Their manufacturing methods and internal structures differ from classical heat pipes, resulting in unique thermo-hydrodynamic behaviors.

APPLIED THERMAL ENGINEERING (2021)

添加到收藏夹

Article Thermodynamics

Effect of double cross sectional ratio on performance characteristics of pulsating heat pipes

Burak Markal et al.

Summary: Experimental investigation on the effect of double cross sectional ratio on performance characteristics of pulsating heat pipes shows that novel gradually constricted geometry boosts flow circulation and maintains stable performance. The newly designed pulsating heat pipe demonstrates better thermal performance than the conventional design.

INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER (2021)

添加到收藏夹

Article Thermodynamics

Effects of filling ratio of a long cryogenic Pulsating Heat Pipe

Maria Barba et al.

Summary: The study on cryogenic pulsating heat pipes for cooling superconducting devices involved heat load tests with different filling ratios using neon, argon, and nitrogen as working fluids. The tests showed that the optimal filling ratios are usually below 50%, highlighting the crucial role of fluid circulation in global heat transfer. Excess liquid at high filling ratios impedes fluid circulation and reduces heat transfer efficiency in the pulsating heat pipes.

APPLIED THERMAL ENGINEERING (2021)

添加到收藏夹

Article Thermodynamics

Numerical study of a novel Single-loop pulsating heat pipe with separating walls within the flow channel

Zhanxiao Kang et al.

Summary: This study proposed a novel pulsating heat pipe with separating walls, which was found to have the best thermal performance at a filling ratio of 70%. The separating walls located at different positions within the flow channel showed varying effects on the equivalent thermal conductivity, with the separating wall at the middle of the flow channel performing best at the filling ratio of 70%.

APPLIED THERMAL ENGINEERING (2021)

添加到收藏夹

Article Thermodynamics

The influence of aspect ratio on the thermal performance of a cryogenic pulsating heat pipe

J. M. Pfotenhauer et al.

Summary: Pulsating heat pipes (PHPs) are being studied for thermal management in superconducting magnets and cryogenic space applications. The study shows that vertically dominated geometries perform better than horizontally dominated ones, with minimum thermal resistance values ranging from 1.5 K/W to 20 K/W for 1-meter-long PHPs. Results indicate that a fill ratio of 70% significantly reduces the influence of orientation and heat load on the PHP's thermal resistance.

APPLIED THERMAL ENGINEERING (2021)

添加到收藏夹

Article Thermodynamics

Investigation of flat plate type pulsating heat pipes via flow visualization-assisted experiments: Effect of cross sectional ratio

Burak Markal et al.

Summary: The combined influence of filling ratio, geometry, inclination angle, and heating power on heat transfer characteristics of pulsating heat pipes (PHPs) was investigated in this study, revealing the key roles of phase change phenomena and bubble dynamics in the thermal characteristics. It was concluded that non-uniform design can improve the operational performance of non-uniform PHPs by reducing the influence of gravity on the results.

INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER (2021)

添加到收藏夹

Article Computer Science, Hardware & Architecture

A Next-Generation Cryogenic Processor Architecture

Ilkwon Byun et al.

Summary: Cryogenic computing technology has shown breakthroughs in high performance and energy efficiency by reducing device leakage power and wire resistance. Recent advances focus on developing cryogenic-optimal cache and memory devices, but research on cryogenic-optimal core architecture is limited. The proposed cryogenic processor architecture in this article achieves performance improvement and power reduction.

IEEE MICRO (2021)

添加到收藏夹

Article Thermodynamics

The combined effects of filling ratio and inclination angle on thermal performance of a closed loop pulsating heat pipe

Burak Markal et al.

Summary: The study demonstrates that filling ratio plays a crucial role in the thermal performance of a copper pulsating heat pipe. In vertical bottom heating mode, thermal resistance increases with increasing filling ratio, except for the lowest and topmost filling ratios of 10% and 85%. The optimum thermal performance is achieved with a filling ratio of 40% in the given conditions.

HEAT AND MASS TRANSFER (2021)

添加到收藏夹

Article Thermodynamics

Effect of a flow behavior on the thermal performance of closed-loop and closed-end pulsating heat pipes

Wookyoung Kim et al.

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER (2020)

添加到收藏夹

Article Thermodynamics

Experimental study on hydrogen pulsating heat pipes under different number of turns

Xiao Sun et al.

CRYOGENICS (2020)

添加到收藏夹

Article Thermodynamics

Relating the thermal properties of a micro pulsating heat pipe to the internal flow characteristics via experiments, image recognition of flow patterns and heat transfer simulations

Chihiro Kamijima et al.

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER (2020)

添加到收藏夹

Article Thermodynamics

Effect of filling ratio and orientation on the performance of a multiple turns helium pulsating heat pipe

Monan Li et al.

CRYOGENICS (2019)

添加到收藏夹

Article Thermodynamics

Experimental study on thermo-hydrodynamic characteristics in a micro oscillating heat pipe

Xiangdong Liu et al.

EXPERIMENTAL THERMAL AND FLUID SCIENCE (2019)

添加到收藏夹

Article Thermodynamics

Experimental study on a hydrogen closed-loop pulsating heat pipe with two turns

Xiao Sun et al.

CRYOGENICS (2019)

添加到收藏夹

Article Thermodynamics

Effect of reentrant cavities on the thermal performance of a pulsating heat pipe

Wookyoung Kim et al.

APPLIED THERMAL ENGINEERING (2018)

添加到收藏夹

Article Thermodynamics

Effects of filling ratio and condenser temperature on the thermal performance of a neon cryogenic oscillating heat pipe

Qing Liang et al.

CRYOGENICS (2018)

添加到收藏夹

Article Thermodynamics

Investigation on the temperature dependence of filling ratio in cryogenic pulsating heat pipes

Xiao Sun et al.

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER (2018)

添加到收藏夹

Article Thermodynamics

Start-up characteristics of MEMS-based micro oscillating heat pipe with and without bubble nucleation

Qin Sun et al.

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER (2018)

添加到收藏夹

Article Thermodynamics

Results of a three evaporator cryogenic helium Pulsating Heat Pipe

Luis Diego Fonseca et al.

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER (2018)

添加到收藏夹

Article Thermodynamics

Effect of number of turns and configurations on the heat transfer performance of helium cryogenic pulsating heat pipe

Monan Li et al.

CRYOGENICS (2018)

添加到收藏夹

Review Engineering, Electrical & Electronic

Physics and performance of nanoscale semiconductor devices at cryogenic temperatures

F. Balestra et al.

SEMICONDUCTOR SCIENCE AND TECHNOLOGY (2017)

添加到收藏夹

Article Mechanics

Quick deposition of a fluid on the wall of a tube

P Aussillous et al.

PHYSICS OF FLUIDS (2000)

添加到收藏夹

© Peeref 2019-2024. All rights reserved.