Heat transfer enhancement in tubular heat exchanger with double V-ribbed twisted-tapes

Tamna, Sombat; Kaewkohkiat, Y.; Skullong, Sompol; Promvonge, Pongjet

doi:10.1016/j.csite.2016.01.002

Cited by 89 publications

(31 citation statements)

References 36 publications

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“…Besides, the depth ratio of V-cut performed more heat transfer than the width ratio of the V-cut. Tamna et al [9] experimentally studied performance intensification using ribbed twisted tapes. The results revealed significant improvement in Nusselt number and thermal performance of tubular heat exchanger compared to TT with no rib.…”

Section: Introductionmentioning

confidence: 99%

Numerical Study of Heat Transfer Enhancement of Turbulent Flow Using Twisted Tape Insert Fitted with Hemispherical Extruded Surface

Rubbi¹,

Habib²,

Tusar³

et al. 2020

IJHT

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Heat transfer enhancement of heat exchangers is an important matter of concern to achieve more effective thermal energy conversion systems. The use of modified twisted tape (TT) inserts as passive technique of heat transfer augmentation are effective way to improve heat transfer. In this study, a numerical analysis is performed to investigate the heat transfer performance enhancement and flow behavior in a circular pipe using TT insert fitted with a hemispherical extruded surface (HES). The study is carried out for the turbulent flow regime (4000≤Re≤10000) at a twist ratio of 4.0 using ANSYS FLUENT. A flow domain is designed and mathematically modeled applying boundary conditions and using governing equations for turbulent model. The plain tube data is validated with established correlations. The achieved numerical results reveal that for TT fitted with HES leads to increment in heat transfer rate up to 69.4% compared to plain tube due to effective swirl flow and better mixing caused by the insert. Corresponding increase in friction factor is found relative to plain tube. The impact on the thermal performance factor has obtained a maximum of 1.24 at constant pumping power for Reynold number 4000.

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Section: Introductionmentioning

confidence: 99%

Numerical Study of Heat Transfer Enhancement of Turbulent Flow Using Twisted Tape Insert Fitted with Hemispherical Extruded Surface

Rubbi¹,

Habib²,

Tusar³

et al. 2020

IJHT

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“…The results demonstrated that using CuO nanofluid with twisted alternate axis (TA) obtain a higher Nusselt number and thermal performance, and the twisted tape in alternate axis was about 89% more effective than typical twisted tape. Various types of twisted tape such as hollow, double, perforated, and dimpled configurations based on the physical properties, e.g., hollow widths and hole diameters, were investigated in many studies [17][18][19][20][21]. Li et al [22] carried out a numerical study on her transfer enhancement in a tube with centrally hollow narrow twisted tape under laminar flow conditions.…”

Section: Twisted Tape Insertsmentioning

confidence: 99%

A Review of Heat Transfer Enhancement Methods Using Coiled Wire and Twisted Tape Inserts

Keklikçioğlu¹,

Özceyhan²

2018

Heat Transfer - Models, Methods and Applications

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Heat transfer enhancement is categorized into passive and active methods. Active methods need external power to input the process; in contrast, passive methods do not require any additional energy to improve the thermohydraulic performance of the system. Passive methods are widely used in both experimental and numerical applications when investigating heat transfer enhancement and friction losses to save energy and costs. The many passive methods for increasing heat transfer rate include various components located in the fluid flow path, such as twisted tapes, coiled or tangled wires, and nozzle turbulators. The present paper represents a comprehensive review that focused on heat transfer enhancement methods with coiled wire and twisted tape inserts since the installation of inserts is easier and more economical. The thermodynamic performance of heat exchange components is also affected by the flow conditions such as laminar or turbulence. The present review comprises investigations on the enhancement of heat transfer using twisted tape and coiled wire inserts in laminar and turbulent flow region.

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“…Tube inserts technique is commonly used as one of the routes under passive method. Few examples of tube inserts in a heat exchanger are twisted tape, helical spring, ribs, conical nozzle, conical ring, etc.twisted tape insert is considered as a primary choice and therefore extensively studied and researched by numerous researchers[8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23] worldwide. A typical twisted tape is shown inFigure 1.…”

mentioning

confidence: 99%

An Effect of Twisted Tape with Nanofluid on the Performance of Double Pipe Heat Exchanger, A Comprehensive Review

Singh¹,

Tjprc²

2019

IJMPERD

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The phenomenon of heat transfer is employed in numerous applications such as refrigeration, airconditioning, food processing, etc. Heat exchangers are used for efficient heat transfer and therefore, the performance of a heat exchanger is important. Cutting edge, innovative and cost-effective techniques are required to achieve efficient heat transfer. Twisted tape (TT) inserts which is a type of passive heat transfer enhancement technique are widely researched. This article delivers an assessment on diverse types of TT in double pipe heat exchangers with different nanofluids. The influence of tape inserts with nano fluids on thermal performance factor (η), Nusselt Number (Nu), friction factor (f) and rate of heat transfer are comprehensively discussed. Application of twisted tape inserts were demonstrated to be more useful in laminar flows w. r. t. turbulent flows. On the contrary, when solid nanoparticles were employed with a high value of φ, heat transfer rate was better in turbulent flows than in laminar flows.

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Heat transfer enhancement in tubular heat exchanger with double V-ribbed twisted-tapes

Cited by 89 publications

References 36 publications

Numerical Study of Heat Transfer Enhancement of Turbulent Flow Using Twisted Tape Insert Fitted with Hemispherical Extruded Surface

Numerical Study of Heat Transfer Enhancement of Turbulent Flow Using Twisted Tape Insert Fitted with Hemispherical Extruded Surface

A Review of Heat Transfer Enhancement Methods Using Coiled Wire and Twisted Tape Inserts

An Effect of Twisted Tape with Nanofluid on the Performance of Double Pipe Heat Exchanger, A Comprehensive Review

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