Recent developments in heat pipe technology and applications: a review

Riffat, Saffa; Ma, Xiaoli

doi:10.1093/ijlct/2.2.162

Cited by 12 publications

(6 citation statements)

References 23 publications

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“…To avoid this, one of the cooling methods uses thermal tubes. A great diversity of thermal tubes has appeared, as shown by [2,[4][5][6], who mentions the use of FMHPs in electronics cooling, space thermal control, aircraft devices, traction drives, audio amplifiers, in cooling of closed cabinets in harsh environmental conditions, space applications under vacuum conditions [4,7] nanofluidic technologies in medicine, process engineering, avionics applications, solar photovoltaic/loop-heat-pipe, (PV/LHP) heat pump system [8] electronic applications, solar units, and aircraft [9] self-driving car, smart TV, smart grid, aerospace, radar, camera, computer, cellphone [10], solar energy systems, heat recovery systems, air conditioning systems, cooling of energy storage and electronic equipment, industrial applications and space apparatus.…”

Section: Introductionmentioning

confidence: 99%

Assessment of Vapor Formation Rate and Phase Shift between Pressure Gradient and Liquid Velocity in Flat Mini Heat Pipes as a Function of Internal Structure

2023

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Flat mini heat pipes (FMHPs) are often used in cooling systems for various power electronic components, as they rapidly dissipate high heat flux densities. The main objective of the present work is to experimentally investigate whether differences in the rate of vapor formation occur on an internal structure containing trapezoidal microchannels and porous sintered copper powder material. Several parameters, such as hydraulic diameter and fluid velocity through the material, as a function of the internal structure porosity, were determined by calculation for a steady state regime. Reynolds number was determined as a function of porosity, according to Darcy’s law, and the Nusselt number was calculated. Since the flow is Darcy-type through the porous medium inside the FMHP, the Darcy friction factor was calculated using five methods: Colebrook, Darcy–Weisbach, Swamee–Jain, Blasius, and Haaland. After experimental tests, it was found that when the porous and trapezoidal microchannel layers are wetted at the same time, the vaporization progresses at a faster rate in the porous material, and the duration of the process is shorter. This recommends the use of such an internal structure in FMHPs since the manufacturing technology is simpler, the materials are cheaper, and the heat flux transport capacity is higher.

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Section: Introductionmentioning

confidence: 99%

Assessment of Vapor Formation Rate and Phase Shift between Pressure Gradient and Liquid Velocity in Flat Mini Heat Pipes as a Function of Internal Structure

2023

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“…HPs have found applications in cooling of energy storage and electronic equipment, 3,4 systems of air conditioning, heat recovery, solar energy, 5 and space apparatus. 6,7 Based on the requirements, HPs are of annular, rectangular, and circular sections. 8 Researchers in China, the United States, India, Japan, and the United Kingdom are the main contributors to the development of HP technology.…”

Section: Introductionmentioning

confidence: 99%

“…The high thermal conductance and low thermal impedance of HPs are designed to control temperature, heat flux amplification, and diminution. HPs have found applications in cooling of energy storage and electronic equipment, 3,4 systems of air conditioning, heat recovery, solar energy, 5 and space apparatus 6,7 . Based on the requirements, HPs are of annular, rectangular, and circular sections 8 …”

Section: Introductionmentioning

confidence: 99%

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Multiobjective optimization for the optimal heat pipe working parameters based on Taguchi's design of experiments

2021

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A heat pipe (HP) is a device transferring large quantities of heat through a small area of the cross‐section with very small deviations in temperature. The thermal impedance of HP is lower while thermal conductance is higher. HPs are designed for controlling temperature, amplification of heat flux, and diminution. HPs are being used in the cooling of aircraft and electronics, solar energy, systems of heat recovery, and nuclear reactors. Complex mathematical formulation demands experimentation to acquire the physical phenomena. Performing experiments is a tedious task with increasing the working parameters and their assigned levels. In such situations, a systematic statistical approach (viz., the Taguchi method) has to be adopted to minimize the number of experiments and to provide the information for the full factorial design of experiments. This paper adopts the modified Taguchi method and applies a simple and reliable multiobjective optimization concept to determine the optimal HP working parameters (viz., heat input, inclination angle, and flow rate). In the optimization process, efficiency, thermal resistance, and overall heat transfer coefficient are the performance indicators (PIs). Empirical relations are developed and validated for the PIs in terms of the HP working parameters. The recommended Taguchi's orthogonal array to perform a few tests may not have the set of optimal working parameters. Additional tests are to be performed to confirm the estimates of the PIs for the optimal working parameters. Confirmation test results in the present study indicate close‐to/within the estimated range.

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“…With the development of electronics cooling technology, heat pipe has already been widely applied in a variety of cooling systems [2][3][4][5][6][7][8]. However, traditional heat pipe generally suffer from the heat transfer limit under the condition without the assistance of gravity.…”

Section: Introductionmentioning

confidence: 99%