Flow condensation heat transfer coefficients of pure refrigerants

Jung, Dongsoo; Song, Kilhong; Cho, Youngmok; Kim, Sin-jong

doi:10.1016/s0140-7007(02)00082-8

Cited by 107 publications

(42 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This was necessary because most of the earlier studies on heat transfer experiments and correlations were developed for this orientation. Jung et al [30] Thome et al [23] Cavalini et al [31] Boelter [27] and it is capable of predicting flow in horizontal, vertical and inclined tubes. Dobson and Chato [28] improved on Chato [29] by including a stratified-wavy model.…”

Section: Data Comparison With Other Investigations and Correlationsmentioning

confidence: 99%

“…Jung et al [30] on the other hand modified the correlation of Dobson and Chato [28] and included the heat and mass flux ratio to arrive at their model. Furthermore, the model of Thome et al [23] The models of Shah [26], Kim and Ghajar [24] and Jung et al [30] underestimated the horizontal experimental data for low mass fluxes and low mean qualities whereas for high mass fluxes and/or high mean vapour qualities, Dobson and Chato [28], and Kim and Ghajar [24] overpredicted the data. However, the models of Thome et al [23] and Cavallini et al [31] are in very good agreement (within  25%) with horizontal tube data.…”

Section: Data Comparison With Other Investigations and Correlationsmentioning

confidence: 99%

See 1 more Smart Citation

Condensation heat transfer in smooth inclined tubes for R134a at different saturation temperatures

Meyer

Dirker

Adelaja

2014

International Journal of Heat and Mass Transfer

View full text Add to dashboard Cite

show abstract

Section: Data Comparison With Other Investigations and Correlationsmentioning

confidence: 99%

Section: Data Comparison With Other Investigations and Correlationsmentioning

confidence: 99%

Condensation heat transfer in smooth inclined tubes for R134a at different saturation temperatures

Meyer

Dirker

Adelaja

2014

International Journal of Heat and Mass Transfer

View full text Add to dashboard Cite

show abstract

“…Here, near about 108 of experimental data have been taken from literature (Experimental measurements of Matkovic et al [19], A. Cavallinia at al [20], Dongsoo Jung at al [21] obtained in a 1 mm internal hydraulic diameter circular mini channel at 40 0 C saturation temperature) for R134a refrigerant as working fluid. Comparative assessment of four available different correlations have been done and finding MRD (Mean Relative Deviation) of each correlation.…”

Section: Comparative Study Of Chtc For Film Condensationmentioning

confidence: 99%

A Comparative Study of Refrigerant Side Condensing Heat Transfer Coefficient for Horizontal Mini Channel

Parekh

Patel

Tailor

2018

MATEC Web of Conferences

View full text Add to dashboard Cite

Abstract. Heat exchanger developments are driven by increase in energetic efficiency and emission reduction. To reach the required standards, new systems are required based on mini-channels along with macro channels also. Mini-channels can be described as tubes with one or more ports extruded in aluminium or any other material like copper, steel etc. with hydraulic diameter in the range of 0.2 to 3 mm. Its use in refrigeration systems became a reality; thanks to the human ability to make micro-scale systems. Some heat exchanger enterprises have some models developed specially for their use in automotive sector, cooling sector and industrial refrigeration without having knowledge of how these reduced geometries affect the most important parameters such as pressure drop and the heat transfer coefficient. To overcome this, an exhaustive literature review of the last two decades has been performed to determinate the state of the research. Among all the publications, several models have been reviewed to check the predicting capacities of them as most of them were developed for macro channels along with single port mini-channel tubes. This work presents a comparative study of existing heat transfer correlations for horizontal flow through mini-channels. Present work total 317 experimental results of condensation heat transfer coefficient obtained from several published literatures and also various condensation heat transfer correlations are reviewed for horizontal flow through mini-channels. Results of condensation heat transfer coefficient obtained for various correlations are compared with the experimental results. Among all correlations used the Bohdalet's correlation gives value of condensation heat transfer coefficient closer to experimental results and has a mean relative deviation (MRD) of 5.4 % whereas mean absolute relative deviation (MARD) of 20.72%.Hence in present work the effort has been made to find better model to predict the condensation heat transfer coefficient which can fit the experimental data with least MRD and MARD.

show abstract

“…In this experimental analysis, six well-known correlations by Cavallini et al [38], Shah [6], Thome et al [39], Akers et al [7], Dobson and Chato et al [9] and Jung et al [40] were applied to compare the heat transfer coefficient of smooth tubes. Comparisons of the heat transfer coefficient between the predictive values and experimental values varying with mass velocity are shown in Figure 11, and Table 5 lists the deviation of various correlations against experimental heat transfer coefficient.…”

Section: Comparison With Existing Correlationsmentioning

confidence: 99%

Experimental Investigation of the Condensation Heat Transfer Coefficient of R134a inside Horizontal Smooth and Micro-Fin Tubes

Lei

et al. 2017

Energies

View full text Add to dashboard Cite

Abstract:The condensation heat transfer coefficient of R134a was experimentally studied inside two smooth and four micro-fin tubes. The working conditions and structural parameters of the test tubes were selected as the influencing factors, and the experiment was conducted under mass velocities of 400-1100 kg·m −2 ·s −1 , condensation temperatures of 35-45 • C and water-testing Reynolds numbers of 8000-22,000, with an inlet superheat of 1-2 • C and outlet subcooling of 1-2 • C at the test section for the refrigerant. Experimental results indicate that the heat transfer coefficient increases with increasing mass velocity and decreasing condensation temperature and water-testing Reynolds number.

show abstract

Flow condensation heat transfer coefficients of pure refrigerants

Cited by 107 publications

References 7 publications

Condensation heat transfer in smooth inclined tubes for R134a at different saturation temperatures

Condensation heat transfer in smooth inclined tubes for R134a at different saturation temperatures

A Comparative Study of Refrigerant Side Condensing Heat Transfer Coefficient for Horizontal Mini Channel

Experimental Investigation of the Condensation Heat Transfer Coefficient of R134a inside Horizontal Smooth and Micro-Fin Tubes

Contact Info

Product

Resources

About