Experimental heat transfer, friction factor and effectiveness analysis of Fe3O4 nanofluid flow in a horizontal plain tube with return bend and wire coil inserts

Sundar, L. Syam; Bhramara, P.; Kumar, Nishant; Singh, Manoj K.; Sousa, António C.M.

doi:10.1016/j.ijheatmasstransfer.2017.02.022

Cited by 66 publications

(13 citation statements)

References 32 publications

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“…In another study, Eiamsa-ard et al [62] studied the thermal performance of a tube fitted with both twisted tape and a coiled wire. Heat transfer and friction factor analyses of coiled wire inserted tube using various types of nanofluid as working fluid were performed by many researchers [63][64][65][66][67][68][69][70][71][72][73]. Promvonge [74] conducted another investigation of thermohydraulic performance in a tube with coiled wire insert and a snail entry.…”

Section: Coiled Wire 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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Section: Coiled Wire 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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“…Significant studies have already been done on the various types of passive techniques like twisted tape, 17,18 louvered strip, and wire coil (spring) inserts 17–37 . These inserts augment the rate of heat transfer at cost of enhanced pumping power inside tubes.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation of heat transfer in a triple tube heat exchanger with coiled spring inserts

Kumar

Prakash

2021

Heat Trans

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Experiments have been performed to investigate the effect of coiled spring inserts on heat transfer, pressure drop, and performance parameters of a triple tube heat exchanger (TTHX). Three different spring inserts having a pitch of 5, 10, and 15 mm are used and the diameter of the spring wire is taken as 1 mm. The experiments were carried out under a turbulent flow regime, with water as a working medium in parallel and counter flow configurations. The variation in different performance characteristics like heat transfer coefficient, Nusselt number, and effectiveness have been compared at various Reynolds numbers ranging between 4000 and 16,000 in the considered flow patterns. The Nusselt number of TTHX with the lowest pitch spring is found to be higher than that of the plain TTHX by 57.27% at Re = 4000 for the counter flow configuration. Both the thermal performance factor and effectiveness increased as the pitch of the spring insert was decreased. The effectiveness of TTHX with the lowest pitch spring insert is found higher than that of the plain TTHX by 43.84% in the counter flow pattern.

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“…Passive methods for heat exchangers improvement generally use modified or geometrical surfaces of flow paths or spiral strips with uniform and nonuniform steps 33,34 . Due to the passage of fluid flow through the spiral strips, such as fluid flow, it is turbulent, causing the fluid to flow in a radial direction, which increases the mass transfer heat transfer 35‐37 .…”

Section: Introductionmentioning

confidence: 99%

Experimental study of exergetic performance of Al₂O₃ nanofluid in a double‐pipe heat exchanger fitted by a new modified twisted tape

Shirazi

2020

Heat Trans

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The use of nanofluids and surface enhancers today are among the new technologies used to increase heat transfer. In this study, heat transfer phenomena in heat exchanger were investigated using Al2O3 nanoparticles and modified spiral band as flow turbulator. Results are verified with well‐known correlations. The results show that the tube with cross‐hollow twisted tape inserts has the best exergetic performance for different hollow widths of the tape. Clearance, which is defined as the width between the tube and twisted tape, also affects the heat transfer performance. The smaller the clearance, the better is the exergetic performance. The tube can achieve the best exergetic performance when the number of unilateral twisted tapes is four. The results showed that increasing nanofluid concentration improves exergetic performance.

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Experimental heat transfer, friction factor and effectiveness analysis of Fe3O4 nanofluid flow in a horizontal plain tube with return bend and wire coil inserts

Cited by 66 publications

References 32 publications

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

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

Experimental investigation of heat transfer in a triple tube heat exchanger with coiled spring inserts

Experimental study of exergetic performance of Al₂O₃ nanofluid in a double‐pipe heat exchanger fitted by a new modified twisted tape

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Experimental heat transfer, friction factor and effectiveness analysis of Fe3O4 nanofluid flow in a horizontal plain tube with return bend and wire coil inserts

Cited by 66 publications

References 32 publications

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

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

Experimental investigation of heat transfer in a triple tube heat exchanger with coiled spring inserts

Experimental study of exergetic performance of Al2O3 nanofluid in a double‐pipe heat exchanger fitted by a new modified twisted tape

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Experimental study of exergetic performance of Al₂O₃ nanofluid in a double‐pipe heat exchanger fitted by a new modified twisted tape