Flow boiling heat transfer of Freon R11 and HCFC123 in narrow passages

Bao, Zhongkai; Fletcher, David F.; Haynes, Brian S.

doi:10.1016/s0017-9310(99)00379-8

Cited by 274 publications

(115 citation statements)

References 15 publications

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“…Bao et al [32] found little or no influence of vapor quality on the heat transfer coefficient as shown in Figure 1 (a). Such a trend was also noted in other studies on small channels [26,27,34].…”

Section: Review Of the Literaturementioning

confidence: 96%

Review and Comparative Analysis of Studies on Saturated Flow Boiling in Small Channels

Bertsch¹,

Groll²,

Garimella³

2008

Nanoscale and Microscale Thermophysical Engineering

112

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Recent studies relating to saturated flow boiling in minichannels and microchannels are reviewed, with a focus on the functional dependence of the heat transfer characteristics on thermodynamic vapor quality. While there is general agreement in the literature that the heat transfer coefficient increases with increases in heat flux, conflicting trends have been reported on the influence of vapor quality. A compilation and analysis of the results from recent investigations in the literature on flow boiling in small channels is presented.Further, correlations for flow boiling proposed in these studies are quantitatively assessed by comparing them against ten independent data sets from the published literature covering a range of hydraulic diameters from 0.16 to 2.01 mm. Recommended topics for future research in this field are also identified.

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Section: Review Of the Literaturementioning

confidence: 96%

Review and Comparative Analysis of Studies on Saturated Flow Boiling in Small Channels

Bertsch¹,

Groll²,

Garimella³

2008

Nanoscale and Microscale Thermophysical Engineering

112

View full text Add to dashboard Cite

show abstract

“…It should also be realized that the three zone model sometimes does not capture the 50 parametric trends of the experimental data and the effect of diameter as shown in Fig. 34 Table 6 that the flow pattern based model predicts 69.1% of the R134 data 30%, 76.3% of the R22 data within 30%.…”

Section: Evaluation the Three-zone Heat Transfer Model And The Flow Pmentioning

confidence: 99%

Fundamental issues, mechanisms and models of flow boiling heat transfer in microscale channels

Cheng

Xia

2017

International Journal of Heat and Mass Transfer

165

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This paper presents state-of-the-art review on the fundamental and frontier research of flow boiling heat transfer, mechanisms and prediction methods including models and correlations for heat transfer in microscale channels. First, fundamental issues of current research on flow boiling in microscale channels are addressed. These mainly include the criteria for macroscale and microscale channels. Then, studies on flow boiling heat transfer behaviours and mechanisms in microscale channels are presented. Next, the available correlations and models of flow boiling

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“…Flow boiling heat transfer models have been proposed and are published in past papers, based on nucleate boiling, forced convective boiling, film flow boiling and annular two phase flow boiling. Experimental results for small diameter tubes also demonstrated heat transfer coefficients that were more or less independent of vapour quality and mass flux, but strongly dependent on heat flux and saturation pressure, (Lazarek and Black (1982), Wambsganss et al (1993), Tran et al (1996), Bao et al (2000), Palm (2003), Huo et al (2007)). Conventionally, this is interpreted as evidence that nucleate boiling is the dominant heat transfer mechanism.…”

Section: Introductionmentioning

confidence: 99%

Flow boiling in a 1.1 mm tube with R134a: Experimental results and comparison with model

Shiferaw

Karayiannis

Kenning

2009

International Journal of Thermal Sciences

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A detailed comparison of the three-zone evaporation model, proposed by Thome et al. (2004), with experimental heat transfer results of two stainless steel tubes of internal diameter 4.26 mm and 2.01 mm using R134a fluid was presented by Shiferaw et al. (2006). In the current paper the comparison is extended to flow boiling in a 1.1 mm tube using R134a as the working fluid. Other parameters were varied in the range: mass flux 100-600 kg/m 2 .s; heat flux 16-150 kW/m 2 and pressure 6-12 bar.The experimental results demonstrate that the heat transfer coefficient increases with heat flux and system pressure, but does not change with vapour quality when the quality is less than about 50% for low heat and mass flux values. The effect of mass flux is observed to be insignificant. For vapour quality values greater than 50% and at high heat flux values, the heat transfer coefficient does not depend on heat flux and decreases with vapour quality. This could be caused by partial dryout. The three-zone evaporation model predicts the experimental results fairly well, especially at relatively low pressure. However, the partial dryout region is highly over-predicted by the model. The sensitivity of the performance of the model to the three optimized parameters (confined bubble frequency, initial film thickness and end film thickness) and some preliminary investigation relating the critical film thickness for dryout to measured tube roughness are also discussed.

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Flow boiling heat transfer of Freon R11 and HCFC123 in narrow passages

Cited by 274 publications

References 15 publications

Review and Comparative Analysis of Studies on Saturated Flow Boiling in Small Channels

Review and Comparative Analysis of Studies on Saturated Flow Boiling in Small Channels

Fundamental issues, mechanisms and models of flow boiling heat transfer in microscale channels

Flow boiling in a 1.1 mm tube with R134a: Experimental results and comparison with model

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