Energy-saving potential of separated two-phase thermosiphon loops for data center cooling

Sulaiman, Mohammed W.; Daraghmeh, Hafiz M.; Wang, Chi-Chuan

doi:10.1007/s10973-020-09499-w

Cited by 13 publications

(4 citation statements)

References 21 publications

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“…In the modern information and digital era, while we enjoy the convenience brought by big data analysis, cloud services, high-performance parallel computing and artificial intelligence, we need to address the related increase in energy consumption and comply with stricter thermal management requirements of data centres (Dang, Jia & Lu 2017). Data centres consume up to 416 billion kWh of electricity each year, which accounts for almost 2.0 % of the global electricity, and thus represent a significant proportion of global power consumption (Sulaiman, Daraghmeh & Wang 2020;Ding et al 2022). Surprisingly, up to 40 % of the electricity is used for mechanical-vapor-compression cooling systems for the data hosts (Dayarathna, Wen & Fan 2016).…”

Section: Introductionmentioning

confidence: 99%

Hydrodynamic metamaterial redirector for steering fluid flow in pipelines with arbitrary curvatures

Pang,

You,

Chen

2024

J. Fluid Mech.

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The dynamics of fluid-conveying pipelines with different shapes has received extensive research attention. Significant wall shear stress and flow separation occur when the fluid flows through pipelines with various curvatures. These phenomena trigger pipeline vibration, the generation of mechanical and hydrodynamic noise, damage, and even the rupture of the pipeline. However, previous studies have not considered the mechanism of internal pipeline flow to eliminate flow separation and the generation of secondary flow inside bent pipelines by redirecting and manipulating the flow. To steer the fluid flow, a ‘hydrodynamic transformation strategy’ based on the metamaterial technology is proposed for the first time in this work; through this strategy, the fluid in pipelines can be made to flow along trajectories that are always parallel to the central axis of the bent pipelines. Interestingly, this innovative method can effectively eliminate the elbow-induced secondary flow and prevent the generation of a pressure gradient toward the pipeline wall. Using the soft lithography technology or the three-dimensional printing technology, the hydrodynamic metamaterial microstructure required to manipulate the fluid flow path in actual engineering applications can be achieved. Our work paves the way for developing new approaches for controlling the flow characteristics and reducing the turbulence intensity of the fluid flowing in pipelines with elbows and corners.

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Section: Introductionmentioning

confidence: 99%

Hydrodynamic metamaterial redirector for steering fluid flow in pipelines with arbitrary curvatures

Pang,

You,

Chen

2024

J. Fluid Mech.

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“…This process may be through natural convection (passive mode) or driven by an electric pump (active mode). However, due to reliability, robustness, and power‐free operation, passive techniques have gained immense popularity in nuclear, solar, and electronic industries 2–6 . Among different techniques, natural circulation loops (NCLs) and thermosyphons have been extensively studied due to their simple construction and high heat removal capacity over long distances 2 …”

Section: Introductionmentioning

confidence: 99%

“…However, due to reliability, robustness, and power-free operation, passive techniques have gained immense popularity in nuclear, solar, and electronic industries. [2][3][4][5][6] Among different techniques, natural circulation loops (NCLs) and thermosyphons have been extensively studied due to their simple construction and high heat removal capacity over long distances. 2 In hindsight, thermosyphon translates to a heat pipe.…”

Section: Introductionmentioning

confidence: 99%

Transient parametric pilot study on thermosyphon heat transport device: A computational fluid dynamics hypothesis and experimental exploration

Varun

Arunachala

2020

Heat Trans

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This study aims to examine the practicality of a novel passive heat transport system “thermosyphon heat transport device” (THTD). It is a fluid‐filled unit, with both source and sink amalgamated within it. A vertical tube‐in‐tube design has been incorporated, consisting of heat source, adiabatic height, and sink. To showcase the performance, a transient numerical analysis is performed using ANSYS Fluent, which is compared with the simple closed thermosiphon (SCT) for heat transport capability (1 kW) and different adiabatic heights (0.25, 1, and 1.5 m). Also, the influence of axial conduction is examined. The proposed Therminol VP1‐based THTD has better heat transport capability over SCT due to a uniform flow pattern. Although the time response diminishes with adiabatic height, the novelty is justified as the heat gained by THTD (adiabatic height: 1.5 m) is 1.5 times more than SCT. Furthermore, the THTD performance is experimentally analyzed by varying the coolant flow rate (0.01, 0.02, and 0.03 kg/s), heat load (100−600 W), and transport distance (0.25 and 0.75 m), which yielded 80%−90% energy efficiency. As the THTD is crucial for a conceptual solar indoor cooker, the response under transient heating/cooling conditions is also investigated, which depicted 300 s for transient heating and 10−50 s for transient cooling.

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“…Datacenter thermal management is a branch of electronic cooling which has been receiving considerable attention lately. Thermal management systems have been estimated to account for 30 to 50% (Kheirabadi and Groulx, 2016;Khalaj and Halgamuge, 2017;Sulaiman et al, 2020) of all electricity consumption in data centers, resulting in high operational costs and contributing to a high overall carbon footprint for this facility.…”

Section: Introduction Data Center and Electronic Coolingmentioning

confidence: 99%

Modeling of a Two-Phase Thermosyphon Loop With Low Environmental Impact Refrigerant Applied to Electronic Cooling

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Energy-saving potential of separated two-phase thermosiphon loops for data center cooling

Cited by 13 publications

References 21 publications

Hydrodynamic metamaterial redirector for steering fluid flow in pipelines with arbitrary curvatures

Hydrodynamic metamaterial redirector for steering fluid flow in pipelines with arbitrary curvatures

Transient parametric pilot study on thermosyphon heat transport device: A computational fluid dynamics hypothesis and experimental exploration

Modeling of a Two-Phase Thermosyphon Loop With Low Environmental Impact Refrigerant Applied to Electronic Cooling

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