Experimental investigation on flow boiling characteristics of zeotropic binary mixtures (R134a/R245fa) in a rectangular micro-channel

Dang, Chao; Jia, Li; Zhang, Xuan; Huang, Qian; Xu, Mingchen

doi:10.1016/j.ijheatmasstransfer.2017.07.106

Cited by 31 publications

(6 citation statements)

References 34 publications

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“…To further validate the VOF/modified LEE model in this study, additional numerical simulations were conducted based on a model of flow boiling heat transfer of R134a/R245fa mixture (70/30 by wt.%) in a 2D microchannel. The numerical conditions duplicated the experimental conditions in [47] such as the constant heat flux of 33 kW/m 2 and the evaporation temperature of 18.5℃. The thermodynamic & transport properties of R134a /R245fa binary mixture were obtained by using NIST REFPROP 9.1 [48].…”

Section: Fig 3 Comparisons Of Htc Results Among Numerical and Referen...mentioning

confidence: 99%

“…As the results indicated, the simulated values of HTC were overpredicted in comparison with the experimental data. One possible reason could be that mass diffusion equations were not considered in the present numerical model, which has been agreed as one of the main reasons that causes the heat transfer degradation of zeotropic mixture compared to pure fluids [47]. Ammonia water, as a zeotropic mixture, associates with more than two species (i.e.…”

Section: Fig 3 Comparisons Of Htc Results Among Numerical and Referen...mentioning

confidence: 99%

“…Dang et al [7,8] carried out experimental studies on flow boiling heat transfer characteristics of R134a/R245fa mixture in a single rectangular microchannel (1mm×1mm) and a seven-parallel segmented microchannel (2mm×1mm) at constant saturated temperatures of 18.5 and 26 ˚C. They discovered that the flow boiling HTC of zeotropic mixtures in mini-channels were typically lower than the original pure fluids in most conditions, but the mixtures could delay surface dry-outs at high heat fluxes and also increase the critical heat flux (CHF) values significantly compared with pure fluids.…”

Section: Introductionmentioning

confidence: 99%

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Numerical investigations on flow boiling heat transfer of ammonia water binary solution (NH3/H2O) in a horizontal microchannel

Yang

Wang

2021

International Journal of Heat and Mass Transfer

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Section: Fig 3 Comparisons Of Htc Results Among Numerical and Referen...mentioning

confidence: 99%

Section: Fig 3 Comparisons Of Htc Results Among Numerical and Referen...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Numerical investigations on flow boiling heat transfer of ammonia water binary solution (NH3/H2O) in a horizontal microchannel

Yang

Wang

2021

International Journal of Heat and Mass Transfer

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“…The results showed that the modified Silver-Bell-Ghaly correlation and modified Granryd correlation were in good agreement with the experimental data. Dang et al [116] experimentally studied the flow boiling characteristics of R134a/R245fa zeotropic mixtures in a single rectangular micro-channel. They extended the flow boiling heat transfer coefficient predicting correlation to micro-scale for zeotropic mixtures based on their experimental results and a recent microscale correlation proposed by Azzolin et al [117].…”

Section: Correlations For Flow Boiling Of Binary Mixturesmentioning

confidence: 99%

A review of boiling heat transfer characteristics in binary mixtures

Wang

Yang

et al. 2021

International Journal of Heat and Mass Transfer

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This paper reviews the state-of-the-art knowledge of boiling heat transfer in binary mixtures, special emphasis is placed on refrigeration industry. The advantage of using refrigerant mixtures over pure refrigerants include the enhancement of coefficient of performance (COP), better match with the desired thermal load and safer, more environmental-friendly refrigerants. In other words, the concept of using mixtures enables more flexibility for the selection of suitable working fluids in particular applications. The purpose of this review article aims to summarize the important published articles on boiling heat transfer in binary mixtures and innovative technologies, as well as to identify limitations to existing studies and directions for future research of this promising thermal management technique. The present article reviews straightforward on both pool boiling and flow boiling in a systematic and comprehensive way. This article maily focus on the review of the effects of mass diffusion, heating surface characteristics, heats from dilution and dissolution on pool boiling heat transfer of binary mixtures, as well as the effects of flow orientation, flow regime and flow instability on flow boiling heat transfer of binary mixtures. Many papers reviewed herein relate to the heat transfer correlations during boiling of binary mixtures. The review reveals that numerical simulations of boiling in binary mixtures, the benefits of surface modification on boiling of binary mixtures and the flow boiling of highly viscous pseudo-plastic mixtures have been scarcely investigated and require further investigation.

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“…采用Moffat [19] 提出的不确定度计算方法来精确计算多(微)通道流动沸腾实验中导出量的不确定度, 计算公式如下: 根据前期微通道流动沸腾特性的相关研究结果可知 [16,20] . [16,20] . [23,24] .…”

Section: 不确定度分析unclassified

Flow and heat transfer characteristics of microchannel flow boiling enhancement with channel configurations

Dang¹,

Li²,

Qi³

et al. 2019

Chin. Sci. Bull.

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Experimental investigation on flow boiling characteristics of zeotropic binary mixtures (R134a/R245fa) in a rectangular micro-channel

Cited by 31 publications

References 34 publications

Numerical investigations on flow boiling heat transfer of ammonia water binary solution (NH3/H2O) in a horizontal microchannel

Numerical investigations on flow boiling heat transfer of ammonia water binary solution (NH3/H2O) in a horizontal microchannel

A review of boiling heat transfer characteristics in binary mixtures

Flow and heat transfer characteristics of microchannel flow boiling enhancement with channel configurations

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