Fabrication and thermal performance of a novel roll-bond flat thermosyphon

Deng, Liqiang; Li, Yong; Xu, Peng; Chen, Zhaoshu; Zhou, Wenjie; Li, Bo

doi:10.1016/j.applthermaleng.2020.115959

Cited by 18 publications

(3 citation statements)

References 26 publications

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“…Without changing the fin radiator structure, and further using phase change technology to strengthen the performance of the radiator, there is a solution to use flat heat pipes as fins to replace conventional aluminum fins. A kind of flat heat pipe called the roll-bond flat heat pipe (RBFHP), whose technology is used in refrigerator evaporators, is made of two aluminum plates through runner printing, rolling, expansion, liquid injection and liquid injection pipe welding [22], with low manufacturing cost, high reliability, and easy-toobtain large area. Its thickness can be 1-5 mm.…”

Section: Introductionmentioning

confidence: 99%

“…However, similar to the thermosiphon [23], there is no liquid suction core structure inside a RBFHP, and gravity has a great influence on it. Deng et al [22] studied the thermal performance of RBFHPs with three typical structures (staggered, crossed and aligned) and four filling ratios (5%, 10%, 20% and 40%). The results showed that the internal boiling state was determined by the filling ratio and heating power, and the RBFHP with a staggered filling rate of 20% had the best performance.…”

Section: Introductionmentioning

confidence: 99%

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Experimental Study of Composite Heat Pipe Radiator in Thermal Management of Electronic Components

Wan,

Qian,

Zhu

et al. 2024

Energies

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Conventional straight fin (SF) radiators have difficulties meeting the cooling requirements of high-power electronic components. Therefore, based on the structure and technology of the detachable fin radiator, this paper proposes a kind of radiator embedded in the heat pipe base and uses the roll-bond flat heat pipe (RBFHP) to replace the traditional fin. The radiator has the advantages of modularity, easy manufacturing, low cost and good heat balance. In this study, the heat pipes (HPs)-RBFHPs radiator was tested in natural convection and forced convection to mimic the actual application scenario and compared with the conventional aluminum radiator. Heating power, angle, wind speed and other aspects were studied. The results showed that the cooling performance of the HPs-RBFHPs radiator was improved by 10.7% to 55% compared with that of the SF radiator under different working conditions. The minimum total thermal resistance in the horizontal state was only 0.37 °C/W. The temperature equalization of the base played a dominant role in the performance of the radiator at a large angle, and the fin group could be ineffective when the angle was greater than 60°. Under the most economical conditions with an inclination of 0° and a wind speed of 2 m/s, the input power was 340 W, the heat source temperature of the HPs-RBFHPs was only 64.2 °C, and the heat dissipation performance was 55.4% higher than that of SFs.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Experimental Study of Composite Heat Pipe Radiator in Thermal Management of Electronic Components

Wan,

Qian,

Zhu

et al. 2024

Energies

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“…The product can be cooled by providing water flow through the hollow water chamber and the water chamber filled with obstacles (Roll-bond), as shown in Fig. 1 [20,21]. It is aimed to realize homogeneous cooling by placing this system under PVC belts in cooling tunnels.…”

Section: Introductionmentioning

confidence: 99%

Roll-Bond Heat Exchanger (Rhe) Design and Application to a Chocolate Cooling Tunnel - A Numerical Study

Tazegül,

Şahin,

Okumuşer

2023

adeletters

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The snack sector has a significant market today. It is expected that the snacks will look as promised on the packaging and that the product will have no deformations or defects. The entire area of liquid chocolate- covered snack products entering the chocolate cooling tunnel must be cooled homogeneously. If all surfaces of the chocolate are not sufficiently cooled, a problem of sticking to the conveyor belt can occur. This study investigates the performance of roll-bond heat exchangers under different operating conditions to solve the snack sector’s technical problems. For this purpose, a CAD model of a roll-bond heat exchanger is created. A steady-state heat transfer problem is established in the SolidWorks Flow Simulation environment, and the problem is solve numerically. The maximum, minimum, and average values of the fluid temperature, pressure difference, fluid velocity, and solid temperature distributions are calculated for different inlet velocities and temperatures. In addition, the standard deviations of the solid temperature values are calculated and evaluated. The results show that the roll-bond heat exchanger applies to the chocolate cooling tunnel and is much more efficient for heat transfer than the conventional design.

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