Experimental study of the irreversible pressure loss coefficient at reduced T-junction with flat tube

Bai, Wei; Xiao, Jiumin; Ru, Zhipeng; Chen, Long; Xu, Xiaoxiao

doi:10.1007/s10973-020-09537-7

Cited by 6 publications

(7 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…An important part of the pressure drop of a heat exchanger device is associated with certain arrangements of T-junctions or flow ramifications, especially the dividing flow type configuration [3,7]. As schematized in figures 1 and 2, the resulting measurements of microHEX include losses due to the presence of the dividing flow (or flow contraction) at microchannel entrance and the combining flow (or flow expansion) at the exit.…”

Section: Pressure Loss Of Micro Protruding T-junctionmentioning

confidence: 99%

“…It is a particular geometry with a high aspect ratio of the main duct to the microchannels (A m /A s =37), a large protrusion degree of microchannels into the manifolds (L prot /D m =0.7), and a very small flow division (β=1/34). This particular T-junction configuration exhibits a very highpressure loss and differs from the traditional minor pressure loss references [1][2][3][4] and related investigations [5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Experimental and numerical pressure drop investigation of a protruding tube microchannel heat exchanger

Settati,

Oliet,

Sanmarti

et al. 2024

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

An experimental and numerical fluid flow study in a micro heat exchanger (microHEX) is conducted in this work to investigate its pressure drop characteristics. The microHEX sample presents a high degree of protrusion of the microchannels inside the inlet and outlet manifolds (Lprot /Dm =0.7), a large manifold-to-branch area aspect ratio (Am/As =37), and a very small flow division in each microchannel (β=1/34). These features configure T-junctions that differ completely from the conventional ones in the literature. Experimental measurements of the microHEX pressure drop were performed for the Reynolds range of 300-2200. The numerical methodology combines a 1D model to evaluate the pressure drop of a single microchannel, adding minor entrance and exit losses due to the change of section and direction. A CFD numerical simulation evaluates the particular pressure loss associated with the dividing T-junction towards the protruded microchannel. The numerical simulation pressure drop results compared well with the experimental measurements, reporting a difference of 3.11% for an initial case. An extension of the work will soon cover all the collected experimental cases.

show abstract

Section: Pressure Loss Of Micro Protruding T-junctionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Experimental and numerical pressure drop investigation of a protruding tube microchannel heat exchanger

Settati,

Oliet,

Sanmarti

et al. 2024

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

show abstract

“…To cope with these drawbacks, T-junction, as a separation conduit, is used (Bai et al , 2020; Chen et al , 2012). Many other thermal implications of multiphase flow include forced convection of flows in bifurcation channels (Selimefendigil et al , 2021, 2019).…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation and prediction of phase separation in diverging T-junction

Ejaz

Pao

Ali

2022

HFF

View full text Add to dashboard Cite

Purpose In plethora of petroleum, chemical and heat transfer applications, T-junction is often used to partially separate gas from other fluids, to reduce work burden on other separating equipment. The abundance of liquid carryovers from the T-junction side arm is the cause of production downtime in terms of frequent tripping of downstream equipment train. Literature review revealed that regular and reduced T-junctions either have high peak liquid carryovers (PLCs) or the liquid appears early in the side arm [liquid carryover threshold (LCT)]. The purpose of this study is to harvest the useful features of regular and reduced T-junction and analyze diverging T-junction having upstream and downstream pipes. Design/methodology/approach Volume of fluid as a multiphase model, available in ANSYS Fluent, was used to simulate air–water slug flow in five diverging T-junctions for eight distinct velocity ratios. PLCs and LCT were chosen as key performance indices. Findings The results indicated that T (0.5–1) and (0.8–1) performed better as low liquid carryovers and high LCT were achieved having separation efficiencies of 96% and 94.5%, respectively. These two diverging T-junctions had significantly lower PLCs and high LCT when compared to other three T-junctions. Results showed that the sudden reduction in the side arm diameter results in high liquid carryovers and lower LCT. Low water and air superficial velocities tend to have low PLC and high LCT. Research limitations/implications This study involved working fluids air and water but applies to other types of fluids as well. Practical implications The novel T-junction design introduced in this study has significantly higher LCT and lower PLC. This is an indication of higher phase separation performance as compared to other types of T-junctions. Because of lower liquid take-offs, there will be less frequent downstream equipment tripping resulting in lower maintenance costs. Empirical correlations presented in this study can predict fraction of gas and liquid in the side arm without having to repeat the experiment. Social implications Maintenance costs and production downtime can be significantly reduced with the implication of diverging T-junction design. Originality/value The presented study revealed that the diameter ratio has a significant impact on PLC and LCT. It can be concluded that novel T-junction designs, T2 and T3, achieved high phase separation; therefore, it is favorable to use in the industry. Furthermore, a few limitations in terms of diameter ratio are also discussed in detail.

show abstract

“…In petroleum, chemical industries and heat exchanger applications, gas extracted from the wells is utilized for power generation [1,2]. In terms of heat transfer applications, the heat transfer phenomenon was also studied by researchers in the past [3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Review of Factors Affecting the Phase-Redistribution in the Branching T-Junction

Ejaz

Pao

Nasif

2021

ARFMTS

View full text Add to dashboard Cite

Whenever T-junctions are used in chemical processes and petroleum industries for two-phase separation, a maldistribution of phases is observed between outlets of the junction. Currently, the regular T-junctions are utilized in the industry due to which equipment downstream faces high liquid carryovers. Unfortunately, downstream equipment is not capable of handling high liquid carryovers and they trip frequently, consequently. This review manuscript summarizes the effect of different factors that influence phase separation in the T-junction. This article refers to the geometrical parameters, phase superficial velocity flow regimes encounter during the separation process, and different side arm modifications. This article is a contribution to this field as it summarizes and concludes all these factors comprehensively, to give a verdict on ways to improve phase separation. It is also recommended that the effect of side arm modifications or combinations must be explored for further understanding.

show abstract

Experimental study of the irreversible pressure loss coefficient at reduced T-junction with flat tube

Cited by 6 publications

References 19 publications

Experimental and numerical pressure drop investigation of a protruding tube microchannel heat exchanger

Experimental and numerical pressure drop investigation of a protruding tube microchannel heat exchanger

Numerical investigation and prediction of phase separation in diverging T-junction

Review of Factors Affecting the Phase-Redistribution in the Branching T-Junction

Contact Info

Product

Resources

About