A study on the correlation between the thermal contact conductance and effective factors in fin–tube heat exchangers with 9.52 mm tube

Jeong, Jin Young; Kim, Chang Nyung; Youn, Baek; Kim, Young Saeng

doi:10.1016/j.ijheatfluidflow.2004.03.005

Cited by 25 publications

(10 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…They concluded that the thermal contact conductance increases when the diameter of the expansion ball increases, when the fin spacing decreases, and when the fin is of the plate type rather than of the slit type. Jeong et al (2004) reported a similar result for fin-tube heat exchangers with 9.52 mm tubes. In the works of both Kim et al and Jeong et al, since the temperature of the hot stream and, consequently, the heat input was kept constant, the effect of heat input on conductance could not be determined.…”

Section: Introductionsupporting

confidence: 59%

Effect of Soft Metal Plating on the Thermal Contact Conductance of Finned-Tube Heat Exchangers

Madhusudana

Cheng²

2006

HVAC&R Research

View full text Add to dashboard Cite

This paper presents the experimental results of thermal contact conductance, heat transfer, and interfacial temperature drop of finned tube heat exchanger test specimens. The results were based on the measured temperatures at several locations on the test specimen so that the thermal contact conductance could be directly determined. Each test specimen was assembled by mechanically expanding seven tubes into a single fin. The geometry of the specimens was based on a commonly used model of heat exchangers. The specimens included one bare tube (uncoated) specimen and three electroplated tube specimens. The plating materials were zinc, silver, and gold. The thickness of the plating in each case was 5 micrometers.Experiments have been conducted in both vacuum and nitrogen. The results show that the highly conductive plating material enhances the thermal contact conductance. The effect of interstitial gas such as nitrogen is beneficial for the heat transfer and the thermal contact conductance. The interfacial temperature drop alone does not fully reflect the efficiency of the heat exchanger.

show abstract

Section: Introductionsupporting

confidence: 59%

Effect of Soft Metal Plating on the Thermal Contact Conductance of Finned-Tube Heat Exchangers

Madhusudana

Cheng²

2006

HVAC&R Research

View full text Add to dashboard Cite

show abstract

“…They concluded that the thermal contact conductance increases when the diameter of expansion ball increases, when the fin spacing decreases, and when the fin is of plate type rather than of slit type. Jeong et al [10] also reported a similar result for finned-tube heat exchangers.…”

Section: Literature Surveymentioning

confidence: 53%

An Experimental Study on the Air-Side Heat Transfer Coefficient and the Thermal Contact Conductance in Finned Tubes

Caruso

Giannetti

Naviglio

2014

Heat Transfer Engineering

View full text Add to dashboard Cite

“…Cheng and Madhusudana [5] evaluated the TCR of tube-fin heat exchanger with direct method by measuring the temperature drop and heat flux across the interface. Jeong et al [6] evaluated the TCR of the tube-fin heat exchanger with novel experimental method: a special specimen of the tube-fin heat exchanger is adopted and the TCC can be obtained by measuring heat transfer rate between rows of the tubes.…”

Section: Introductionmentioning

confidence: 99%

Study on evaluation method of tube—fin thermal contact conductance

Ding

Peng

et al. 2010

Proceedings of the Institution of Mechanical Engineers, Part C:

View full text Add to dashboard Cite

The thermal contact conductance (TCC) is one of the principal parameter in heat transfer mechanism of tube-fin heat exchangers. Because of the difficulties in experimental measurements, the tube-fin TCC has not been focused deeply. This article presents a novel method in evaluating the TCC of tube-fin heatexchanger. First, the tube-fin contact status is investigated with a finite-element model of tube expansion process. Distribution of contact pressure along the tube-fin interface is obtained from the simulation results. Then, experiments are carried out for the relationship between the contact pressure and the TCC. Combining the experiment result with the contact pressure distribution, the tube-fin TCC can be evaluated. Based on the method, effect of processing factors of the expansion forming process, such as expanding ratio and die geometry, are examined.

show abstract

A study on the correlation between the thermal contact conductance and effective factors in fin–tube heat exchangers with 9.52 mm tube

Cited by 25 publications

References 5 publications

Effect of Soft Metal Plating on the Thermal Contact Conductance of Finned-Tube Heat Exchangers

Effect of Soft Metal Plating on the Thermal Contact Conductance of Finned-Tube Heat Exchangers

An Experimental Study on the Air-Side Heat Transfer Coefficient and the Thermal Contact Conductance in Finned Tubes

Study on evaluation method of tube—fin thermal contact conductance

Contact Info

Product

Resources

About