Measurement of subcooled boiling pressure drop and local heat transfer coefficient in horizontal tube under LPLF conditions

Baburajan, P.K.; Bisht, Govind Singh; Gupta, Satish Kumar; Prabhu, S.V.

doi:10.1016/j.nucengdes.2012.10.012

Cited by 72 publications

(5 citation statements)

References 20 publications

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“…Many correlations have been proposed based on very limited data. Some such older correlations for macrochannels are those of Thom et al (1965) [28], Papell (1963) [43], Badiuzzaman (1967) [61], Kandlikar (1998) [62], Prodanovic et al (2002) [63], and Baburajan et al (2013) [53]. Among these, those of Badiuzzaman and Pappel have been compared by many researchers to data, with mixed results.…”

Section: Prediction Methodsmentioning

confidence: 99%

Further Study and Development of Correlations for Heat Transfer during Subcooled Boiling in Plain Channels

Shah

2023

Fluids

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The author’s published correlations for subcooled boiling in channels are further studied and developed in this work. The areas explored include choice of equivalent diameters for annuli and partially heated channels, effects of flow direction, micro-gravity, and orientation of heated surface. A new correlation is developed, which is a modification of the author’s earlier correlation. The author’s previous correlations and the new correlation are compared with a very wide range of test data for round tubes, rectangular channels, and annuli. Several other correlations are also compared with the same data. The authors’ correlations provide good agreement with data, the new correlation giving the least deviation. The data included hydraulic diameters from 0.176 to 22.8 mm, reduced pressure from 0.0046 to 0.922, subcooling from 0 to 165 K, mass flux from 59 to 31,500 kgm−2s−1, all flow directions, and terrestial to micro gravity. The new correlation has mean absolute deviation (MAD) of 13.3% with 2270 data points from 49 sources. Correlations by others had MAD of 18% to 116%. The results are presented and discussed.

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Section: Prediction Methodsmentioning

confidence: 99%

Further Study and Development of Correlations for Heat Transfer during Subcooled Boiling in Plain Channels

Shah

2023

Fluids

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“…The inner wall temperatures are computed from the measured outer wall temperatures using one dimensional heat conduction equation under steady state conditions. The details of this correction methodology are given in Baburajan et al [33]. The local axial heat transfer coefficients at circumferential locations are calculated from these wall temperatures and local bulk fluid temperatures.…”

Section: Validation Of the Experimental Methodologymentioning

confidence: 99%

Local heat transfer coefficient in helical coils with single phase flow

Hardik

Baburajan

Prabhu

2015

International Journal of Heat and Mass Transfer

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135

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“…Therefore, the flow mechanism of SP pressure drop cannot be simply applied to the hypervapotron. Subcooled boiling flow has also been studied in depth, and many pressure drop correlations have been proposed [26,[30][31][32][33]. The forms of subcooled boiling pressure drop correlations are different, but most of them contain r.…”

Section: Authors Correlationsmentioning

confidence: 99%

Pressure Drop Characteristics of Subcooled Water in a Hypervapotron under High and Non-Uniform Heat Fluxes

Zhu,

Mei,

Yan

et al. 2023

Energies

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To study the pressure drop characteristics of hypervapotron, which was designed as a water-cooling structure in the divertor dome of the fusion reactor, the pressure drop tests of subcooled water were carried out in a vertically upward hypervapotron. To simulate the one-side radiant heating condition in the engineering application, the non-uniform heat fluxes were obtained by using the off-center electrically heating method. The system parameters were as follows: mass flux G = 2000–5000 kg·m−2·s−1, inlet pressure p = 2–4 MPa, and equivalent one-side radiating heat flux qe = 0–5 MW·m−2. The effects of the parameters on the pressure drop were discussed in detail. It was observed that in the single-phase (SP) region, the pressure drop was little influenced by the inlet fluid temperature (Tb,in). However, in the subcooled boiling region, the pressure drop increased rapidly with the increasing Tb,in. A higher G leads to a high pressure drop. In the SP region, the influence of p on the pressure drop is not obvious, and the pressure drop decreased with the increasing qe. The test data are used to evaluate the typical pressure drop correlation, and the results show that none of these correlations can predict the pressure drop well under the test conditions. Therefore, a new pressure drop correlation is proposed for subcooled water in a hypervapotron under high and non-uniform heat fluxes. The new correlation has a high prediction accuracy for the test data, and the mean relative error (MRE) and root mean square error (RMSE) are 0.72% and 4.33%, respectively. The test results have a reference value for the design of the water-cooling structure of the diverter.

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Measurement of subcooled boiling pressure drop and local heat transfer coefficient in horizontal tube under LPLF conditions

Cited by 72 publications

References 20 publications

Further Study and Development of Correlations for Heat Transfer during Subcooled Boiling in Plain Channels

Further Study and Development of Correlations for Heat Transfer during Subcooled Boiling in Plain Channels

Local heat transfer coefficient in helical coils with single phase flow

Pressure Drop Characteristics of Subcooled Water in a Hypervapotron under High and Non-Uniform Heat Fluxes

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