Flow boiling in horizontal multiport tube: Development of new heat transfer model for rectangular minichannels

Jige, Daisuke; Kikuchi, Shogo; Eda, Hikaru; Inoue, N.

doi:10.1016/j.ijheatmasstransfer.2019.118668

Cited by 26 publications

(13 citation statements)

References 22 publications

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“…An investigation was conducted on the flow boiling properties of R-32 and R-1234ze(E) by Jige et al [77] at a saturated temperature of 15 • C. The mass fluxes were between 50 and 400 kg/m 2 s. In regions with low heat flux, high mass flux, and high vapor quality, forced convective boiling dominated the heat transfer process. A new model of heat transfer considered nucleate boiling, forced convection, and thin-layer evaporation.…”

Section: Characteristics Evaporation Htcs and Pressure Drops Inside P...mentioning

confidence: 99%

A Comprehensive Review on the Nucleate/Convective Boiling of Low-GWP Refrigerants: Alternatives to HFC Refrigerants

2023

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This review presents the nucleate/convective boiling performance for a variety of important low global warming potential (LGWP) alternatives to commonly used high-global warming potential (GWP) refrigerants (such as R-134a, R404A, and R-410A, etc.). Efforts are stressed on the assessment of their evaporation pressure drop and heat transfer coefficient (HTC) characteristics. These alternatives include R-1234ze(Z), R-1234ze(E), R-1233zd (E), R-1234ze(E), R-410A, R-1234yf, and R-513A. The authors investigated the thermo-fluid properties within and outside a tube, mini-channel, micro-fin tube, and plate heat exchanger. The investigation of the numerical, experimental, and simulated results revealed that the evaporation pressure drop and HTC characteristics were dependent on a variety of variables. These factors include the working fluid’s thermodynamics and transport properties, the refrigerant’s mass flux, heat flux, saturation temperature, the vapor quality, the conditions and flow patterns, the orientation of the heating surface, and the geometry (shape, size, and surface area smooth/enhanced) of the heating surface. An expanded LGWP refrigerants, surfaces, and conditions database is needed. Mechanistic models may assist. These models can optimize boiling, anticipate heat transfer, and develop high-performance geometries.

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Section: Characteristics Evaporation Htcs and Pressure Drops Inside P...mentioning

confidence: 99%

A Comprehensive Review on the Nucleate/Convective Boiling of Low-GWP Refrigerants: Alternatives to HFC Refrigerants

2023

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“…All the friction pressure drop data compiled from multiport minichannel evaporators are shown in Table 4 [29][30][31][32][33][34][35][36][37][38][39].…”

Section: Multiport Minichannel Evaporatorsmentioning

confidence: 99%

“…The laminar evaporation pressure drop data from eleven sources [29][30][31][32][33][34][35][36][37][38][39] were analyzed using regression models such as ANOVA, power-law, log-linear, linear, neural networks, cubic spline, etc. As shown in Figure 11, at an MBD of 14% and RMSD of 49.8%, the power-law equation Eq.…”

Section: Laminar Evaporation Pressure Drop: Regression Analysis and C...mentioning

confidence: 99%

A New Two-Phase Multiplier for Flow Pressure Drop in Multiport Minichannel Condensers and Evaporators

Mukkamala

Dirker

2022

Heat Transfer Engineering

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Due to flow maldistribution, the condensation and evaporation flow patterns in multiport minichannels are considerably different from single minichannels or macrochannels. This article compiled the friction pressure drop data from experimental phase-change investigations in multiport minichannel condensers and evaporators over the past two decades. The data was reduced to friction pressure gradients, and a new two-phase multiplier was proposed for estimating the phase-change pressure drop in multiport condensers and evaporators. Thirteen hundred and forty-four condensation pressure drop and six hundred and twentythree evaporation pressure drop data from twenty-nine studies were correlated to yield four predictive two-phase multiplier equations in the laminar and turbulent flow regimes. The predictive correlations fit 67% of the laminar condensation and 80% of the turbulent pressure drop data within ±50%. Further, 57% of the laminar evaporation and 100% of the turbulent evaporation pressure drop data were fit within ±50%. The correlations were compared with widely published correlations and were a significant improvement. Metaanalysis revealed that multiport minichannels are most effective for reducing turbulent flow condensation pressure drop and laminar flow evaporation pressure drop. The compiled data and presented correlations and analysis should be helpful to the process, electronics packaging, aviation, and aerospace industries designing compact, lightweight, and high-efficiency condensers, and evaporators.

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“…Some other investigations of R1234ze(E) flow boiling were implemented in multiport tubes. Jige et al [13] studied the HTC of R1234ze(E) and R32 by using a horizontal multiport channel with 12 parallel rectangular minichannels (0.82 mm × 0.82 mm). The experimental conditions were set as t sat = 15 • C, G = 50-400 kg/m 2 s, and q = 5-40 kW/m 2 .…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation on Flow Boiling Heat Transfer and Pressure Drop of a Low-GWP Refrigerant R1234ze(E) in a Horizontal Minichannel

Yan

2021

Energies

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To protect the environment, a new low-GWP refrigerant R1234ze(E) was created to substitute R134a. However, its flow boiling performances have not received sufficient attention so far, which hinders its popularization to some extent. In view of this, an experimental investigation was carried out in a 1.88 mm horizontal circular minichannel. The saturation pressures were maintained at 0.6 and 0.7 MPa, accompanied by mass flux within 540–870 kg/m2 s and heat flux within 25–65 kW/m2. For nucleate boiling, a larger heat flux brings about a larger heat transfer coefficient (HTC), while for convective boiling, the mass flux and vapor quality appear to take the lead role. The threshold vapor quality of different heat transfer mechanisms is around 0.4. Additionally, larger saturation pressure results in large HTC. As for the frictional pressure drop (FPD), it is positively influenced by mass flux and vapor quality, while negatively affected by saturation pressure, and the influence of heat flux is negligible. Furthermore, with the measured data, several existing correlations are compared. The results indicate that the correlations of Saitoh et al. (2007) and Müller-Steinhagen and Heck (1986) perform best on flow boiling HTC and FPD with mean absolute deviations of 5.4% and 10.9%.

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Flow boiling in horizontal multiport tube: Development of new heat transfer model for rectangular minichannels

Cited by 26 publications

References 22 publications

A Comprehensive Review on the Nucleate/Convective Boiling of Low-GWP Refrigerants: Alternatives to HFC Refrigerants

A Comprehensive Review on the Nucleate/Convective Boiling of Low-GWP Refrigerants: Alternatives to HFC Refrigerants

A New Two-Phase Multiplier for Flow Pressure Drop in Multiport Minichannel Condensers and Evaporators

Experimental Investigation on Flow Boiling Heat Transfer and Pressure Drop of a Low-GWP Refrigerant R1234ze(E) in a Horizontal Minichannel

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