Effect of electroplating on the thermal conductance of fin–tube interface

Cheng, Wui-wai; Madhusudana, C. V.

doi:10.1016/j.applthermaleng.2006.04.016

Cited by 15 publications

(8 citation statements)

References 14 publications

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“…It is reported that increase of the expanding ratio will reduce the tube-fin thermal contact resistance with large contact pressure (Jeong et al, 2006;Cheng and Madhusudana, 2006). But Tang et al (2009a) found that too large expanding ratio will cause the inclines of the fin plates.…”

Section: Introductionmentioning

confidence: 95%

Optimization to the tube–fin contact status of the tube expansion process

Ding¹,

Li²,

Peng³

2011

Journal of Materials Processing Technology

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Section: Introductionmentioning

confidence: 95%

Optimization to the tube–fin contact status of the tube expansion process

Ding¹,

Li²,

Peng³

2011

Journal of Materials Processing Technology

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“…Therefore, some of the researchers have undertaken studies taking into account the realistic fin-tube thermal contact and its impact on the thermal efficiency of heat exchangers. Aside from the experimental research aimed at estimating the thermal contact resistance [11,12], its value is also obtained through semiempirical methods, partly based on numerical analysis. Taler and Oclon [13] and Taler and Cebula [14] changed iteratively the value of contact resistance in their CFD model in such a way that the thermal and flow quantities obtained from the numerical solution agreed with the measured ones.…”

Section: Introductionmentioning

confidence: 99%

Study of the Influence of the Lack of Contact in Plate and Fin and Tube Heat Exchanger on Heat Transfer Efficiency under Periodic Flow Conditions

et al. 2021

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Plate fin-tube heat exchangers are widely used in air conditioning and refrigeration systems and other industry fields. Various errors made in the manufacturing process can result in the formation of an air gap between the tube and fin. Several numerical simulations were carried out for a symmetric section of plate fin-tube heat exchanger to study the influence of air gap on heat transfer under periodic flow conditions. Different locations and sizes of an air gap spanning 1/2 circumference of the tube were considered for the range of airflow velocities. Velocity and temperature fields for cases with air gap were compared with ideal thermal contact cases. Blocking of heat flow by the gap leads to the reduction of heat transfer rate. Fin discontinuity in the front of the tube causes the smallest reduction of the heat transfer rate in comparison to the ideal tube-fin contact, especially for thin slits. The rear gap position is the worst in the smallest gap range. Therefore, reversing the flow direction can lead to up to a 15% heat transfer increase, if mainly the rear gaps are present. The introduction of a thin slit in the front of the tube leads to convective heat transfer enhancement, which should be further investigated.

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“…In order to improve the thermal performance of the tubeefin joining, evaluation methods of the TCC have been studied to optimize the tube expansion process. Cheng and Madhusudana [7] evaluated the TCR of tubeefin heat exchanger with direct method by measuring the temperature drop and heat flux across the interface. Generally, on study the TCR of the tubeefin interface, experimental measurements with specimen of heat exchanger are mostly adopted.…”

Section: Introductionmentioning

confidence: 99%