Investigation of ultra-thin flattened heat pipes with sintered wick structure

Li, Yong; He, Junlin; He, Hengfei; Yan, Yuying; Zeng, Ziqian; Li, Bo

doi:10.1016/j.applthermaleng.2015.04.027

Cited by 77 publications

(23 citation statements)

References 19 publications

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“…实验探究了超薄热管的压扁厚度由0.6增至2 mm时的传热性能. 其最大传热量可由3增至10 W. Li等人 [17] 探索了不同工艺参数对多孔材料吸液芯最终成型的影响, 并通过实验探究了不同压扁厚度对超薄热管传热性能的影响. 实验发现, 采用0.45 mm粉层厚度的吸液芯, 压扁至1.5 mm 时已出现挤压现象; 当压扁至1 mm时, 挤压十分严重, 孔隙率下降, 热管性能急剧恶化.…”

Section: 极高的导热性和优良的等温性而热管技术在微小unclassified

Experimental research on structure parameters of the ultra-thin flattened heat pipe

Tang¹,

Dai²,

Liu³

et al. 2019

Chin. Sci. Bull.

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Section: 极高的导热性和优良的等温性而热管技术在微小unclassified

Experimental research on structure parameters of the ultra-thin flattened heat pipe

Tang¹,

Dai²,

Liu³

et al. 2019

Chin. Sci. Bull.

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“…The research shows that a flat heat pipe can reduce the temperature of the chip to the maximum extent, increase its overall temperature uniformity, and take very small heat dissipation space, which has significant advantages in high intensity heat dissipation and temperature control for micro-scale components [ 2 ]. At present, extensive research has focused on flat heat pipes (FHP) and vapor chambers (VC) [ 3 ]. The former is made by directly flattening the traditional cylindrical heat pipe, which is composed of evaporator, condenser, and adiabatic part [ 4 ].…”

Section: Introductionmentioning

confidence: 99%

Study on Flow Characteristics of Working Medium in Microchannel Simulated by Porous Media Model

Xue

Guo

et al. 2020

Micromachines

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As a phase change evaporator, a microchannel array heat exchanger is of great significance in the field of microscale heat dissipation. The performance of which strongly depends on the flow resistance, capillary force, and other factors. In order to improve the heat dissipation efficiency, it is necessary to perform an in-depth study of the characteristics of microchannel flow using numerical simulation. However, the current simulation model requires high computational cost and long simulation time. To solve this problem, this paper simplifies the numerical simulation of the rectangular parallel array microchannels by building the basic flow model based on the concept of porous media. In addition, we explore the effect of aspect-ratio (AR), hydraulic diameter, inlet velocity, and other parameters of fluid flow behavior inside the microchannels. Meanwhile, a user-defined function (UDF) is formulated to add the capillary force into the model to introduce capillary force into the porous media model. Through the above research, the paper establishes the porous media model for single-phase and gas-liquid two-phase flow, which acts as a simplification of microchannel array simulation without grossly affecting the results obtained. In addition, we designed and manufactured experiments using silicon-based microchannel heat exchangers with different-ratios, and combined with the visualization method to measure the performance of the device and compared them with simulation results. The theoretical model is verified through the suction experiment of array microchannel evaporator capillary core. The simplified model of microchannel array significantly saves the computational cost and time, and provides guidance for the related experimental researches.

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“…Generally, there are several primary methods that include using lightweight metals, improving the wick structure, minimizing the size of devices and changing the working fluids, etc. [100,102,103].…”

Section: Battery Cooling/preheatingmentioning

confidence: 99%

Advances in Integrated Vehicle Thermal Management and Numerical Simulation

et al. 2017

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Abstract:With the increasing demands for vehicle dynamic performance, economy, safety and comfort, and with ever stricter laws concerning energy conservation and emissions, vehicle power systems are becoming much more complex. To pursue high efficiency and light weight in automobile design, the power system and its vehicle integrated thermal management (VITM) system have attracted widespread attention as the major components of modern vehicle technology. Regarding the internal combustion engine vehicle (ICEV), its integrated thermal management (ITM) mainly contains internal combustion engine (ICE) cooling, turbo-charged cooling, exhaust gas recirculation (EGR) cooling, lubrication cooling and air conditioning (AC) or heat pump (HP). As for electric vehicles (EVs), the ITM mainly includes battery cooling/preheating, electric machines (EM) cooling and AC or HP. With the rational effective and comprehensive control over the mentioned dynamic devices and thermal components, the modern VITM can realize collaborative optimization of multiple thermodynamic processes from the aspect of system integration. Furthermore, the computer-aided calculation and numerical simulation have been the significant design methods, especially for complex VITM. The 1D programming can correlate multi-thermal components and the 3D simulating can develop structuralized and modularized design. Additionally, co-simulations can virtualize simulation of various thermo-hydraulic behaviors under the vehicle transient operational conditions. This article reviews relevant researching work and current advances in the ever broadening field of modern vehicle thermal management (VTM). Based on the systematic summaries of the design methods and applications of ITM, future tasks and proposals are presented. This article aims to promote innovation of ITM, strengthen the precise control and the performance predictable ability, furthermore, to enhance the level of research and development (R&D).

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Investigation of ultra-thin flattened heat pipes with sintered wick structure

Cited by 77 publications

References 19 publications

Experimental research on structure parameters of the ultra-thin flattened heat pipe

Experimental research on structure parameters of the ultra-thin flattened heat pipe

Study on Flow Characteristics of Working Medium in Microchannel Simulated by Porous Media Model

Advances in Integrated Vehicle Thermal Management and Numerical Simulation

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