Pressure drop during horizontal flow boiling of R410A/oil mixture in 5mm and 3mm smooth tubes

Hu, Haitao; Ding, Guifu; Huang, Xiaolu; Deng, Bin; Gao, Yifeng

doi:10.1016/j.applthermaleng.2009.05.011

Cited by 21 publications

(3 citation statements)

References 22 publications

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“…It should be noted that this analysis is useful to show that g,i does not exist at high values of Xtt for some correlations available in the literature such as the g correlation of Ding et al (2009) to predict the pressure drop of R410A-oil mixtures in microfin tubes, the g correlation of Hu et al (2008) to predict the pressure drop of R410A/POE oil mixture in micro-fin tubes, and the g correlation of Hu et al (2009) to predict the pressure drop of R410A/oil mixture in smooth tubes because  2 g,i has negative values at high values of Xtt , Awad, 2010b, and Awad, 2011. Also, it this analysis is useful to show that l,i does not exist at certain values of Xtt for some correlations available in the literature like the l correlation of Changhong et al (2005) to predict the pressure drop in two vertical narrow annuli (Awad, 2012b).…”

Section: Interfacial Pressure Gradientmentioning

confidence: 99%

Two-Phase Flow

Awad¹

2012

An Overview of Heat Transfer Phenomena

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Section: Interfacial Pressure Gradientmentioning

confidence: 99%

Two-Phase Flow

Awad¹

2012

An Overview of Heat Transfer Phenomena

View full text Add to dashboard Cite

Section: Interfacial Pressure Gradientmentioning

confidence: 99%

An Overview of Heat Transfer Phenomena

2012

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has eighteen years engineering service experience in petrochemical industries. He was the Head of Engineering and Construction of a chemical plant producing sulfuric acid and single super phosphate for two years. He has the academic background with BSc in engineering (mechanical), Masters in mechanical engineering and PhD in chemical and materials engineering. He has 43 technical papers published in national and international journals and conference proceedings. He has worked as a part-time consultant of Crown Agents Services Ltd, a British company where he works in a consulting team for gas pipelines layout and installation, gas drilling environment management etc. He has also worked for one and a half year as Plant Manager of a Hydrogen Peroxide Plant of capacity 60 ton per day. At present he is working as an academic in the

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“…For a ribbed tube, numerous factors such as tube diameter, rib parameters, inner surface configuration, rib structure, and flow pattern affect the prediction of two-phase flow frictional pressure drop. Over the past years, predictions of two-phase frictional pressure drop in micro-fin channels [15][16][17] and small diameter tubes 18 have been proposed. A few investigations have been conducted on the internally ribbed tubes used in large capacity boilers.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation on frictional multiplier of steam-water two-phase flow in internally ribbed enhanced tubes

Wang

Zhao

et al. 2017

Advances in Mechanical Engineering

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The frictional multiplier of steam-water two-phase flow in four-head internally ribbed tubes was experimentally investigated under two test conditions-adiabatic and heated. The internally ribbed tube has the following dimensions: outside diameter 28.6 mm, wall thickness 5.8 mm, and hydraulic diameter 15.24 mm. The test tube, 2000 mm in length, was vertically installed and uniformly heated electrically. A wide range of experimental parameters were considered. The pressure range was 9-31 MPa, mass flux range was 600-1800 kg/(m 2 s), and steam quality range was 0-1 in subcritical pressure region. In this study, the effects of pressure, mass flux, and steam quality on the frictional multiplier were analyzed. The corresponding empirical correlations were presented. The variation in pressure drop between the adiabatic tube and heated tube was determined. The experimental results demonstrated that the characteristics of the frictional pressure drop in the internally ribbed tube under heated and adiabatic conditions are dissimilar. The two-phase frictional multiplier in the heated tube is higher than that in the adiabatic tube. With the decrease in the pressure or increase in the steam quality, the two-phase frictional multiplier increases gradually. However, the single-phase frictional factor in the heated tube is smaller than that in the adiabatic tube in the subcritical and supercritical pressure region.

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Pressure drop during horizontal flow boiling of R410A/oil mixture in 5mm and 3mm smooth tubes

Cited by 21 publications

References 22 publications

Two-Phase Flow

Two-Phase Flow

An Overview of Heat Transfer Phenomena

Experimental investigation on frictional multiplier of steam-water two-phase flow in internally ribbed enhanced tubes

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