Experimental investigation of heat transfer of supercritical carbon dioxide flowing in a cooled vertical tube

Bruch, Arnaud; Bontemps, André; Colasson, Stéphane

doi:10.1016/j.ijheatmasstransfer.2008.12.021

Cited by 139 publications

(31 citation statements)

References 20 publications

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“…Nu is the Nusselt number calculated for each particular value of Bo and Nu FC is the forced convection Nusselt number that is calculated when the buoyancy term is set to zero. This type of diagram is widely used for assessing the effect of buoyancy on turbulence convection heat transfer [1,7,8]. It is observed that there is a good agreement between the current CFD solution and the DNS data, and both deterioration and recovery zones have been captured well in the present solution.…”

Section: Validation Of Resultssupporting

confidence: 59%

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Buoyancy induced heat transfer deterioration in vertical concentric and eccentric annuli

Forooghi

Abdi

Dahari

et al. 2015

International Journal of Heat and Mass Transfer

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a b s t r a c tTurbulent convection heat transfer of upward fluid flows in vertical annular channels with uniformly heated inner wall and adiabatic outer wall is investigated numerically. Two concentric geometries with outer-to-inner diameter ratios of 2.4 and 3 as well as two eccentric geometries with identical outer-toinner diameter ratio of 2.4 and eccentricities of 0.25 and 0.5 are investigated. Heat transfer deterioration, similar to that of a circular pipe, is observed. The range of buoyancy parameter, over which deterioration is observed, is close to that of circular pipes. Moreover, it is observed that when the value of eccentricity increases, the deterioration phenomenon becomes less pronounced and recovery of heat transfer coefficient occurs earlier, i.e. at lower buoyancy parameters compared to concentric annuli.

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Section: Validation Of Resultssupporting

confidence: 59%

“…Watts and Chou [7] derived a correlation to predict deterioration based on the buoyancy parameter for supercritical water in circular pipes. Similar studies have been done for circular pipes with CO 2 [1,8].…”

Section: Introductionmentioning

confidence: 54%

Buoyancy induced heat transfer deterioration in vertical concentric and eccentric annuli

Forooghi

Abdi

Dahari

et al. 2015

International Journal of Heat and Mass Transfer

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“…A large amount of previous works and more recent experimental and numerical studies concerning supercritical water, carbon dioxide and cryogenic methane [24][25][26][27][28][29][30][31][32][33] have demonstrated that conventional forced convection heat transfer correlations fail to accurately predict the heat transfer coefficients of supercritical fluids with deviations larger than 60% from the experimental data, especially near the pseudo-critical point, indicating that due to rapid changes in thermal physical properties of supercritical fluids near the pseudo-critical point, the heat transfer regime at supercritical pressures could be significantly different from that of constant property fluid. This is mainly because the effect of the strong non-uniform and non-linear thermal properties on heat transfer effectiveness cannot be simply evaluated using simple bulk temperature.…”

Section: Introductionmentioning

confidence: 99%

PDF-based modeling on the turbulent convection heat transfer of supercritical CO2 in the printed circuit heat exchangers for the supercritical CO2 Brayton cycle

Zhang

et al. 2016

International Journal of Heat and Mass Transfer

103

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“…In addition, Dang and Hihara [5] correlation is complicated and developed by incorporating the variation of physical properties at the wall temperature, which is normally unknown or hardly [16,17]. Therefore, more efforts are needed to be done.…”

Section: Comparisons Between the Correlations And The Experimental Datamentioning

confidence: 99%

Analysis on heat transfer correlations of supercritical CO2 cooled in horizontal circular tubes

Lin

2011

Heat Mass Transfer

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The objective of the present study is to analyze the heat transfer correlations of supercritical CO 2 cooled in horizontal circular tubes. In the paper, heat transfer correlations are first reviewed and compared with the experimental data at different heat fluxes. The results show that most of the previous correlations agree well with the experimental data under lower heat flux, but fail to predict the heat transfer coefficient well when the heat flux is as high as 33 kW/m 2 . The study of buoyancy effect on convective heat transfer shows that buoyancy effect significantly affects the heat transfer with the increase of heat flux, and both free and forced convections operate in the turbulence flow during supercritical CO 2 cooling process. The influencing factors on heat transfer coefficient are summarized and the new correlation can be developed with the four dimensionless numbers.

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Experimental investigation of heat transfer of supercritical carbon dioxide flowing in a cooled vertical tube

Cited by 139 publications

References 20 publications

Buoyancy induced heat transfer deterioration in vertical concentric and eccentric annuli

Buoyancy induced heat transfer deterioration in vertical concentric and eccentric annuli

PDF-based modeling on the turbulent convection heat transfer of supercritical CO2 in the printed circuit heat exchangers for the supercritical CO2 Brayton cycle

Analysis on heat transfer correlations of supercritical CO2 cooled in horizontal circular tubes

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