Cooling in poor air quality environments - Impact of fan operation on particle deposition

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Cooling in poor air quality environments - Impact of fan operation on particle deposition. / Stafford, Jason; Xu, Chen.

In: IEEE Transactions on Components, Packaging and Manufacturing Technology, Vol. 11, No. 8, 9440973, 08.2021, p. 1206-1213.

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@article{b2cd945bb9ea4e4aa98ff29e4dd1f8a4,
title = "Cooling in poor air quality environments - Impact of fan operation on particle deposition",
abstract = "Environmental pollutants are a source for reliability issues across data center and telecommunications equipment. A primary driver of this is the transport and deposition of particle matter (PM2.5, PM10) on printed circuit boards, electronic components, and heat exchange surfaces. This process is enhanced by turbulent air flows generated from cooling fans. Particle pollutants can persist after contemporary filtering, highlighting the importance of elucidating particle transport mechanisms and utilizing this information to design robust equipment. This study investigates particle transport behavior arising from axial fans operating under varied aerodynamic conditions. Transient, multiphase numerical simulations were performed to model the flow of millions of microscale particles in air and determine their fate. Across a comprehensive range of fan operation conditions, from aerodynamic stall to free delivery, nondimensional deposition velocities spanned an order of magnitude. Deposition profiles vary from monotonic to nonmonotonic behavior, influenced by local flow impingement, blade tip vortices, and shear velocity. A simple flow control solution that mitigates the factors influencing deposition has been demonstrated for equipment already deployed. The findings and numerical methods can be applied for the optimization of fan-cooled equipment intended for indoor and outdoor environments where air quality is poor, or pollution levels are high.",
keywords = "Air cooling, fans, fouling, particles, reliability",
author = "Jason Stafford and Chen Xu",
note = "Publisher Copyright: {\textcopyright} 2011-2012 IEEE.",
year = "2021",
month = aug,
doi = "10.1109/TCPMT.2021.3084047",
language = "English",
volume = "11",
pages = "1206--1213",
journal = "IEEE Transactions on Components, Packaging and Manufacturing Technology",
issn = "2156-3950",
publisher = "Institute of Electrical and Electronics Engineers (IEEE)",
number = "8",

}

RIS

TY - JOUR

T1 - Cooling in poor air quality environments - Impact of fan operation on particle deposition

AU - Stafford, Jason

AU - Xu, Chen

N1 - Publisher Copyright: © 2011-2012 IEEE.

PY - 2021/8

Y1 - 2021/8

N2 - Environmental pollutants are a source for reliability issues across data center and telecommunications equipment. A primary driver of this is the transport and deposition of particle matter (PM2.5, PM10) on printed circuit boards, electronic components, and heat exchange surfaces. This process is enhanced by turbulent air flows generated from cooling fans. Particle pollutants can persist after contemporary filtering, highlighting the importance of elucidating particle transport mechanisms and utilizing this information to design robust equipment. This study investigates particle transport behavior arising from axial fans operating under varied aerodynamic conditions. Transient, multiphase numerical simulations were performed to model the flow of millions of microscale particles in air and determine their fate. Across a comprehensive range of fan operation conditions, from aerodynamic stall to free delivery, nondimensional deposition velocities spanned an order of magnitude. Deposition profiles vary from monotonic to nonmonotonic behavior, influenced by local flow impingement, blade tip vortices, and shear velocity. A simple flow control solution that mitigates the factors influencing deposition has been demonstrated for equipment already deployed. The findings and numerical methods can be applied for the optimization of fan-cooled equipment intended for indoor and outdoor environments where air quality is poor, or pollution levels are high.

AB - Environmental pollutants are a source for reliability issues across data center and telecommunications equipment. A primary driver of this is the transport and deposition of particle matter (PM2.5, PM10) on printed circuit boards, electronic components, and heat exchange surfaces. This process is enhanced by turbulent air flows generated from cooling fans. Particle pollutants can persist after contemporary filtering, highlighting the importance of elucidating particle transport mechanisms and utilizing this information to design robust equipment. This study investigates particle transport behavior arising from axial fans operating under varied aerodynamic conditions. Transient, multiphase numerical simulations were performed to model the flow of millions of microscale particles in air and determine their fate. Across a comprehensive range of fan operation conditions, from aerodynamic stall to free delivery, nondimensional deposition velocities spanned an order of magnitude. Deposition profiles vary from monotonic to nonmonotonic behavior, influenced by local flow impingement, blade tip vortices, and shear velocity. A simple flow control solution that mitigates the factors influencing deposition has been demonstrated for equipment already deployed. The findings and numerical methods can be applied for the optimization of fan-cooled equipment intended for indoor and outdoor environments where air quality is poor, or pollution levels are high.

KW - Air cooling

KW - fans

KW - fouling

KW - particles

KW - reliability

UR - http://www.scopus.com/inward/record.url?scp=85107229080&partnerID=8YFLogxK

U2 - 10.1109/TCPMT.2021.3084047

DO - 10.1109/TCPMT.2021.3084047

M3 - Article

VL - 11

SP - 1206

EP - 1213

JO - IEEE Transactions on Components, Packaging and Manufacturing Technology

JF - IEEE Transactions on Components, Packaging and Manufacturing Technology

SN - 2156-3950

IS - 8

M1 - 9440973

ER -