Research on condensation heat transfer characteristics of R447A, R1234ze, R134a and R32 in multi-port micro-channel tubes

Li, Minxia; Guo, Qiang; Lv, Jiatong; Li, Dongri

doi:10.1016/j.ijheatmasstransfer.2017.10.101

Cited by 35 publications

(8 citation statements)

References 26 publications

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“…When velocity was increasing, the heat flux caused by forced convection was increasing as well, complying with findings from existing studies [31][32][33]. the influence of supply velocity on melting ice.…”

Section: Convection Meltingsupporting

confidence: 89%

Experimental and numerical investigation of the performance of bogie chassis heater deicing systems

Liu

et al. 2020

Energy and Buildings

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This is a PDF file of an article that has undergone enhancements after acceptance, such as the addition of a cover page and metadata, and formatting for readability, but it is not yet the definitive version of record. This version will undergo additional copyediting, typesetting and review before it is published in its final form, but we are providing this version to give early visibility of the article. Please note that, during the production process, errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.

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Section: Convection Meltingsupporting

confidence: 89%

Experimental and numerical investigation of the performance of bogie chassis heater deicing systems

Liu

et al. 2020

Energy and Buildings

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“…Li et al [63] experimentally investigated and theoretically analysed the heat transfer characteristics of R447A (R32/R1234ze/R125), which was a triple mixture, flowing in horizontal multi-port extruded micro-tubes with a hydraulic diameter of 0.86 mm for variable saturation temperatures, steam qualities and mass fluxes. Some of the findings of the study were as follows: the heat transfer coefficient of R447A was greatly more than that of R32 and slightly lower than that of R134A, whereas higher than that of R1234ze; R447A refrigerant performed better than R32/R134a (51/49 mass% and 24.5/76.5 mass%), R32/R1234ze (45/55 mass% and 21/79 mass%) mixtures and R410A in terms of heat transfer; the condensation heat transfer coefficients determined by the reviewed correlations estimated the experimental results within the mean absolute error of 30%.…”

Section: Horizontal and Vertical Orientationsmentioning

confidence: 99%

Comprehensive Review on the Flow Characteristics of Two-Phase Flows in Inclined Tubes

Karademir¹,

Ozcelik²,

Açıkgöz³

et al. 2021

Journal of Thermal Engineering

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This paper presents a comprehensive review of research works on condensation and boiling heat transfer characteristics in horizontal, vertical and inclined tubes both smooth and enhanced. Although there are many studies examining two-phase flows inside tubes, it is almost impossible to find such a comprehensive study for two-phase flow in tubes. Moreover, while number of the studies concerning condensation or boiling inside tubes are limited, the present study covers almost all studies of condensation and boiling inside inclined tubes. Previous studies are classified into many subtitles according to configuration (horizontal, vertical or inclined) and roughness (smooth or enhanced) as well as aim of the study (researching the effect of parameters on the heat transfer coefficient, pressure drop or evaluation of prediction correlation). Such a wide range of classification and scope have no done before. Condensation and boiling phenomena are of great importance in heat exchangers, cooling systems, etc. due to their wide utilization in those devices. Additionally, two-phase flow and the associated heat transfer are becoming increasingly important in industrial applications because the heat transfer coefficient in twophase flows is much higher than in single-phase flows. In this research, major topics such as heat transfer, pressure drop, friction factor and void fraction were studied using active and passive techniques in the literature. The fluids used in the reviewed studies diverse in a very wide range. For pure refrigerants (single component-fluorocarbon refrigerant),

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“…Minxia Li (2017): In this paper, the condensation heat transfer characteristics of R447A in 0.86 mm hydraulic diameter multi-port extruded micro-tubes were investigated. For binary mixture of R32, with increasing concentration, the heat transfer coefficient increases.…”

Section: Fig2 Enhancement Factmentioning

confidence: 99%

A Review on Thermal Characteristics of Single and Two-phase Flow inMini channel for Refrigeration

Trivedi¹,

Bhavsar²,

Shah³

et al. 2018

IJCET

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Research on condensation heat transfer characteristics of R447A, R1234ze, R134a and R32 in multi-port micro-channel tubes

Cited by 35 publications

References 26 publications

Experimental and numerical investigation of the performance of bogie chassis heater deicing systems

Experimental and numerical investigation of the performance of bogie chassis heater deicing systems

Comprehensive Review on the Flow Characteristics of Two-Phase Flows in Inclined Tubes

A Review on Thermal Characteristics of Single and Two-phase Flow inMini channel for Refrigeration

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