Experimental research on vibration-enhanced heat transfer of fin-tube vehicle radiator

Polymeric hollow fiber heat exchangers are an alternative to common metal heat exchangers in lowtemperature applications. Their advantages are low cost, low weight, and corrosion resistance. The heat transfer surface consists of hundreds or even thousands of fibers of small diameter. The PHFHE for gas-liquid application has a regular structure, which prevents the fibers from blocking the heat transfer surface and allow the gas to flow through the heat exchanger. This arrangement, known as the bank of tubes, is common for the multipass shell and tube heat exchangers. There are relations used to estimate the pressure drop of flow passing the bank of tubes. Those are based on extensive experimental research with steel tubes. Unfortunately, it seems that those relations do not apply to flexible fibers. This paper shows the discrepancy between the theory for non-flexible bank of tubes and measured data of PHFHE.

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“…The flexible fibers are more allowed to vibrate. The pressure drop increase with increasing vibration intensity was studied (Li et al, 2020).…”

Section: Resultsmentioning

confidence: 99%

Pressure Drop Study of Polymeric Hollow Fiber Heat Exchangers

Kroulíková¹,

Astrouski²,

Kůdelová³

2020

Engineering Mechanics 2020

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“…Generally, as far as the heat exchangers within the active TMS are concerned, the heat transfer performance can be improved when they are exposed to the vibration environment. Li et al [163] applied a vibration-enhanced heat transfer technology to improve the heat dissipation efficiency of a fin-tube radiator. The effects of vibrations on the thermal hydraulic performance of the radiator were analyzed via numerical simulation and wind tunnel tests.…”

Section: Effects Of Vibrations and Shock On Active Tmsmentioning

confidence: 99%

Thermal Management Technologies Used for High Heat Flux Automobiles and Aircraft: A Review

Zhang

Wang

et al. 2022

Energies

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In recent years, global automotive industries are going through a significant revolution from traditional internal combustion engine vehicles (ICEVs) to electric vehicles (EVs) for CO2 emission reduction. Very similarly, the aviation industry is developing towards more electric aircraft (MEA) in response to the reduction in global CO2 emission. To promote this technology revolution and performance advancement, plenty of electronic devices with high heat flux are implemented on board automobiles and aircraft. To cope with the thermal challenges of electronics, in addition to developing wide bandgap (WBG) semiconductors with satisfactory electric and thermal performance, providing proper thermal management solutions may be a much more cost-effective way at present. This paper provides an overview of the thermal management technologies for electronics used in automobiles and aircraft. Meanwhile, the active methods include forced air cooling, indirect contact cold plate cooling, direct contact baseplate cooling, jet impingement, spray cooling, and so on. The passive methods include the use of various heat pipes and PCMs. The features, thermal performance, and development tendency of these active and passive thermal management technologies are reviewed in detail. Moreover, the environmental influences introduced by vibrations, shock, acceleration, and so on, on the thermal performance and reliability of the TMS are specially emphasized and discussed in detail, which are usually neglected in normal operating conditions. Eventually, the possible future directions are discussed, aiming to serve as a reference guide for engineers and promote the advancement of the next-generation electronics TMS in automobile and aircraft applications.

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“…In VDI-Heat Atlas [18] the model, which is based mostly on Gnieliski and does not have these obstacles, is published. This model is used in the presented study:…”

Section: Pressure Drop Of a Bank Of Tubesmentioning

confidence: 99%

Air-side pressure drop of polymeric hollow fibre heat exchangers

Kroulíková¹,

Astrouski²,

Kůdelová³

2020

AMS

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Polymeric hollow fibre heat exchangers are an alternative to common metal heat exchangers in low-temperature applications. Their advantages are low cost, low weight, and corrosion resistance. The heat transfer surface consists of hundreds or even thousands of fibres of small diameter. There are several studies on thermal performance of the polymeric hollow fibre heat exchangers, but the pressure drop is also a crucial part of the design. The arrangement, known as the bank of tubes, is common for the heat exchangers and there are relations used to estimate the pressure drop of flow passing the bank of tubes. Those are based on extensive experimental research with steel tubes. The tubes of polymeric hollow fibre are flexible. The pressure drop predicted by the known relations are underestimated.

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Experimental research on vibration-enhanced heat transfer of fin-tube vehicle radiator

Cited by 27 publications

References 41 publications

Pressure Drop Study of Polymeric Hollow Fiber Heat Exchangers

Pressure Drop Study of Polymeric Hollow Fiber Heat Exchangers

Thermal Management Technologies Used for High Heat Flux Automobiles and Aircraft: A Review

Air-side pressure drop of polymeric hollow fibre heat exchangers

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