CFD simulation on the heat transfer and flow characteristics of a microchannel separate heat pipe under different filling ratios

Yue, Chang; Zhang, Quan; Zhai, Zhiqiang; Li, Ling

doi:10.1016/j.applthermaleng.2018.01.011

Cited by 85 publications

(21 citation statements)

References 24 publications

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“…The Reynolds number was considered from 6300 to 12,640 for different coil diameters at a water inlet velocity of 0.5 m/s so the flow was assumed to be turbulent. The numerical analysis was carried out using ANSYS Fluent 18.2 based on the CFD codes which are used to describe the complex behaviors of the heat and mass transfer [24][25][26] and also are implemented in various problems [27][28][29]. The upwind second-order method was applied for the discretization of continuity, momentum, and energy equations.…”

Section: Grid Generation and Numerical Methodsmentioning

confidence: 99%

A parametric study of the heat exchanger copper coils used in an indirect evaporative cooling system

2019

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Due to the lower energy consumption in the evaporative cooling, it is the subject of numerous studies. Evaporative cooling considers a green cooling system which does not require any chemical reaction and does not depend on the hazardous material. The present study mainly focused on parametric analysis of an indirect evaporative cooling system using the computational fluid dynamics method. The numerical simulation of an indirect evaporative cooling system was carried out using ANSYS Fluent 18.2. The effects of the water inlet velocity, air inlet velocity, coil diameters (d c ) and the number of the heat exchanger copper coils were numerically investigated. The flow was considered as threedimensional, turbulent, and incompressible. The results indicated that the increment of the coil diameter and water inlet velocity had a positive effect on the performance of the indirect evaporative cooling system. The maximum water outlet temperature was obtained at 285.05 K for the water inlet velocity of 0.5 m/s. Moreover, the saturation efficiency is decreased by increasing air inlet velocity. On the other hand, saturation efficiency was increased at all air inlet velocities by increasing the coil diameter.

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Section: Grid Generation and Numerical Methodsmentioning

confidence: 99%

A parametric study of the heat exchanger copper coils used in an indirect evaporative cooling system

2019

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“…The feasibility and accuracy of using Computational Fluid Dynamics (CFD) and a mathematical model to study the heat pipe have been confirmed by a large number of scholars (Ling et al., 2015, 2017; Yue et al., 2018a, 2018b; Zhang et al., 2017), and they also have used similar mathematical models to optimize LHPs. Chuang et al.…”

Section: Introductionmentioning

confidence: 97%

One-dimensional steady-state mathematical model of a novel loop heat pipe with liquid line capillary wick

Meng

Zhang

et al. 2019

Energy Exploration & Exploitation

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A novel loop heat pipe used for data center with a liquid line wick is designed, and its one-dimensional steady-state mathematical model is developed based on the energy and thermodynamic equilibrium of each component and the simulation results were validated by comparing with the experimental data in this work. The compensation chamber of the loop heat pipe was removed, and a section of capillary wick was added in the end of liquid line in order to reduce heat leakage and vapor backflow and increase working medium circulation power. The mathematical model of the novel loop heat pipe can be used to predict the operating temperature of each characteristic point with small relative errors of <13%. A parametric study of the steady-state performance characteristics including the effects of material, diameter, length, and porosity of liquid line wick are conducted, which provides a powerful basis for the design of novel loop heat pipe experiment.

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“…Yue et al [10] developed a study by CFD modeling of the segment of a steam turbine separated by MC varying the filling ratio of the refrigerant, finding the optimum operating percentages, and establishing a method to simplify the experiments. A more complete review of the main applications that use CFD for Physical phenomena modeling associated with heat transfer and fluid movement can be found in studies by Hnaien et al [11] where they compared several turbulence models using computational mechanics to simulate the interaction of parallel jets, highlighting better predictions in the results when using the standard k -ε model.…”

Section: Introductionmentioning

confidence: 99%

CFD Modeling of Microchannels Cooling for Electronic Microdevices

Fábregas

Santamaria

Buelvas

et al. 2022

IIUMEJ

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A simulation of the cooling of electronic devices was carried out by means of microchannels, using water as a coolant to dissipate the heat generated from a computer processor, and thus stabilize its optimum operating temperature. For the development of this study, computational fluid mechanics modeling was established in order to determine the temperature profiles, pressure profiles, and velocity behavior of the working fluid in the microchannel. In the results of the study, the operating temperatures of the computer processor were obtained, in the ranges of 303 K to 307 K, with fluid velocities in the microchannels of 5 m/s, a pressure drop of 633.7 kPa, and a factor of safety of the design of the microchannel of 15. From the results, the improvement of the heat transfer in a cooling system of electronic devices was evidenced when using a coolant as a working fluid compared to the cooling by forced air flow traditional. ABSTRAK: Simulasi penyejukan alatan elektronik telah dibina menggunakan saluran mikro, di samping air sebagai agen penyejuk bagi menghilangkan haba yang terhasil dari pemproses komputer, dan penstabil pada suhu operasi optimum. Kajian ini mengenai model komputasi mekanik bendalir bagi menentukan profil suhu, profil tekanan, dan halaju perubahan bendalir dalam saluran mikro. Dapatan kajian menunjukkan suhu operasi pemproses komputer adalah pada julat suhu 303 K sehingga 307 K, dengan halaju bendalir dalam saluran mikro adalah pada kelajuan 5 m/s, penurunan tekanan sebanyak 633.7 kPa, dan faktor keselamatan 15 bagi reka bentuk saluran mikro. Ini menunjukkan terdapat kenaikan pemindahan haba bagi sistem penyejukan alatan elektronik ini, terutama apabila cecair digunakan sebagai penyejuk haba berbanding kaedah tradisi iaitu dengan mengguna pakai aliran udara sebagai agen penyejuk.

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CFD simulation on the heat transfer and flow characteristics of a microchannel separate heat pipe under different filling ratios

Cited by 85 publications

References 24 publications

A parametric study of the heat exchanger copper coils used in an indirect evaporative cooling system

A parametric study of the heat exchanger copper coils used in an indirect evaporative cooling system

One-dimensional steady-state mathematical model of a novel loop heat pipe with liquid line capillary wick

CFD Modeling of Microchannels Cooling for Electronic Microdevices

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