Characteristics of two-phase flow pattern transitions and pressure drop of five refrigerants in horizontal circular small tubes

Pamitran, Agus Sunjarianto; Choi, Kwang-Il; Oh, Jong-Taek; Hrnjak, Pega

doi:10.1016/j.ijrefrig.2009.12.009

Cited by 104 publications

(29 citation statements)

References 22 publications

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“…Good predictions are shown by the homogeneous model; Massena (1960) andEl Hajal et al (2003) (Kα h model), Lockhart and Martinelli (1949), Domanski and Didion (1983), Wallis and Flow (1969), and Chen and Spedding (1981) The three abovementioned pressure drop prediction methods showed that the pressure drop deviation in the homogeneous method was lower than in the others. The pressure drop calculated by Pamitran et al (2010) showed a better deviation than the homogeneous method, while that calculated by parameter C by Chisholm showed a larger data spreading.…”

Section: Homogeneous Model (1)mentioning

confidence: 78%

Void Fraction of Flow Boiling with Propane in Circular Horizontal Tube

Novianto

Pamitran²,

Koestoer³

et al. 2016

IJTech

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An investigation into flow boiling void fraction was conducted to observe its characteristics and to develop a new correlation of void fraction based on the separated model. The study used a natural refrigerant of R-290, flowed in a horizontal tube of 7.6 mm inner diameter under experimental conditions of 3.7 to 9.6 o C saturation temperature, 10 to 25 kW/m 2 heat flux, and 185 to 445 kg/m 2 s mass flux. The void fraction, calculated by the present experimental data, was used for comparison with 31 existing correlations, including model types as follows: homogeneous, slip ratio, Kαh correlation, drift flux, and a model based on the LockhartMartinelli correlation (Xtt). A new void fraction correlation, as a function of liquid and vapor Reynolds numbers, was proposed, based on the data. The measured pressure drop was compared with some pressure drop correlations that use the newly developed void fraction combination. The best prediction was shown by the homogeneous model.

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Section: Homogeneous Model (1)mentioning

confidence: 78%

Void Fraction of Flow Boiling with Propane in Circular Horizontal Tube

Novianto

Pamitran²,

Koestoer³

et al. 2016

IJTech

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“…The deviations from the correlation results from the previous experimental data are listed in Table 4, and the selected comparison figures are shown in figures 9(a)-(j). The pressure drop homogenous model of Beattie and Whalley (1982) provided the best prediction in the A.S. Pamitran et al (2010) study among the other methods, yielding a mean deviation of around 23%. Mishima and Hibiki (1996) is the best correlation to predict the pressure drop in K. 0 .…”

Section: Flow Patternmentioning

confidence: 94%

“…/dp exp. The pressure drop homogenous model of Beattie and Whalley (1982) provided the best prediction in the A.S. Pamitran et al (2010) study among the other methods, yielding a mean deviation of around 23%. Mishima and Hibiki (1996) is the best correlation to predict the pressure drop in K. (2000) model was developed with R-410A and air-water in a 5 mm smooth tube.…”

Section: Flow Patternmentioning

confidence: 94%

“…S Pamitran et al (2010) and (2007) Mishima and Hibiki (1996) Lockhart and Martinelli (1949) Table 5. Some of previous correlations to predict pressure drop used by S. Pamitran et al (2010) and (2007) Heat Transfer -Theoretical Analysis, Experimental Investigations and Industrial Systems effect of mass flux on the heat transfer coefficient indicates that nucleate boiling heat transfer is predominant. Several previous studies performed by Kew and Cornwell (1997), Lazarek and Black (1982), Wambsganss et al (1993), Tran et al (1996) and Bao et al (2000) used small tubes and showed that, in small channels, nucleate boiling tends to be predominant.…”

Section: Flow Patternmentioning

confidence: 99%

See 1 more Smart Citation

Two-Phase Flow Boiling Heat Transfer for Evaporative Refrigerants in Various Circular Minichannels

Oh¹,

Hoo-Kyu²,

Choi³

2011

Heat Transfer - Theoretical Analysis, Experimental Investigations and Industrial Systems

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“…Pamitran et al [38] presented an experimental investigation into the characteristics of two-phase flow pattern transitions and pressure drop of R-22, R-134a, R-410A, R-290, and R-744 in horizontal small stainless steel tubes of = 0.5, 1.5 and 3.0 mm. The researchers obtained experimental data over a heat flux range of 5-40 kW/m 2 , mass flux range of 50-600 kg/(m 2 ⋅s), saturation temperature range of 0-15 ∘ C, and mass quality up to 1.0.…”

Section: Literature Reviewmentioning

confidence: 99%

Modeling of Interfacial Component for Two-Phase Frictional Pressure Gradient at Microscales

Awad

Muzychka

2014

Advances in Mechanical Engineering

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A simple approach for calculating the interfacial component of frictional pressure gradient in two-phase flow at microscales is presented. This approach is developed using superposition of three pressure gradients: single-phase liquid, single-phase gas, and interfacial pressure gradient. The proposed model can be transformed in two different ways: first, two-phase interfacial multiplier for liquid flowing alone ( 2 , ) as a function of two-phase frictional multiplier for liquid flowing alone ( 2 ) and the LockhartMartinelli parameter, , and, second, two-phase interfacial multiplier for gas flowing alone ( 2 , ) as a function of two-phase frictional multiplier for gas flowing alone ( 2 ) and the Lockhart-Martinelli parameter, . This proposed model allows for the interfacial pressure gradient to be easily modeled. Comparisons of the proposed model with experimental data for microchannels and minichannels and existing correlations for both and versus are presented.

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Characteristics of two-phase flow pattern transitions and pressure drop of five refrigerants in horizontal circular small tubes

Cited by 104 publications

References 22 publications

Void Fraction of Flow Boiling with Propane in Circular Horizontal Tube

Void Fraction of Flow Boiling with Propane in Circular Horizontal Tube

Two-Phase Flow Boiling Heat Transfer for Evaporative Refrigerants in Various Circular Minichannels

Modeling of Interfacial Component for Two-Phase Frictional Pressure Gradient at Microscales

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