Effect of square wing with combined solid ring twisted tape inserts on heat transfer and fluid flow of a circular tube heat exchanger

Datt, Ravi; Bhist, Mangal Singh; Kothiyal, Alok Darshan; Maithani, Rajesh; Kumar, Anil

doi:10.1080/15435075.2018.1525552

Cited by 8 publications

(3 citation statements)

References 42 publications

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“…To break the vicious and thermal boundary layers of the HE a disturbance is introduced in the path of fluid flow which helps to increase the HT rate (Dewan et al, 2004). Numerous engineering methods to improve the HT rate from the wall in existing HE have been introduced by many researchers (Datt et al, 2018). Wire coil, fin, dimple, and Twisted tape (TT) insert are some of the passive techniques used by researchers to improve HT rate.…”

Section: Literature Reviewmentioning

confidence: 99%

Improvement of Heat Transfer Through Use of Twisted Tape Inserts: A Review

2024

EPPM-Journal

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The objective of this review paper is to identify the gap in finding out the direction toward the enhancement of heat transfer and the performance of heat exchangers. Heat exchangers can be found in many applications ranging from engineering devices to household consumer appliances. Heat exchangers must offer a good heat transfer performance apart from saving energy. Heat transfer enhancement techniques help to save energy and cool hot components in the design of electronic and mechanical circuits. However, enhancement in heat transfer takes place at the cost of a bearable increase in friction losses and pressure drop. Therefore, miniature heat exchanger systems and the cost of energy, motivate industries to use energy-saving methods in their design. With aging, the most common problem in heat exchangers is the reduction in heat transfer rate. Numerous studies have proved that placing a disturbance occurs in the fluid flow path and it can help to increase the heat transfer rate in the case of worn-out heat exchangers. For decades, researchers are numerically investigating the effects of various kinds of insert tape to improve the heat transfer operation in the heat exchangers. As heat exchangers form the backbone of many industrial processes, the idea of saving energy with the design of a cost-effective tape insert motivated us to work on this area of research. The paper proposes the new model of heat exchanger with an insert having a trapezoidal cut on both sides of an insert and using the different ratios of twist experimentation that will perform and compare the output with the previous studies by using different fluid or phase change materials as a fluid to maximize the performance of heat transfer rate. Also, it aims to find out the impact on friction factor as well pressure drop in the heat exchanger when there is a change in ratios of twist. This research aims to review the findings of earlier researchers in this area and to utilize the knowledge for improving the heat transfer rate of conventional tubes in our future work.

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Section: Literature Reviewmentioning

confidence: 99%

Improvement of Heat Transfer Through Use of Twisted Tape Inserts: A Review

2024

EPPM-Journal

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“…The results revealed that the increment in the heat transfer and the thermal hydraulic performance were found to be 3.18 and 2.87 times, respectively. The investigation of effect of solid rings with twisted tape fitted inside the tube is analyzed by Datt et al 12,13 The investigation reported a fruitful result of enhanced heat transfer rate of 5.66 times that of smooth pipe and thermohydraulic performance enhanced by 2.74 times the smooth conventional heat exchanger pipe.…”

Section: Introductionmentioning

confidence: 99%

Parametric optimization of heat exchanger tube having twisted tape turbulent promoters and silicon oxide nanofluid

Agarwal

Maithani

Sharma

et al. 2022

Intl J of Energy Research

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Summary The optimization of heat exchanger tube parametric having SiO2/H2O based nanofluid flow through the twisted tape insert. The optimization basis is to maximize the heat transfer function and minimize the pressure drop function. The parameters selected for optimization are: twisted tape width to diameter ratio WT/DT, twisted length to width ratio (LT/WT), and the nano particle concentration ϕ. The analysis is carried out for Reynolds number (Re) ranging from 5000 to 17 000. The analysis reveals that the parameter values that delivers the maximum heat transfer with minimum pressure drop is optimized parameter value for a selected range of Re. The optimum value of parameters are WT/DT of 0.8, LT/WT of 1.74, and ϕ of 1.25 vol.% and Re of 17 000.

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“…al. [26] investigated a solid circular ring turbulator with a number (ranges 1 to 4) of square wing twisted tape. Akpinar [27] experimentally studied the effect of helical spring turbulator inside the inner pipe of a double pipe heat exchanger on heat transfer and friction factor.…”

Section: Introductionmentioning

confidence: 99%

Enhancing the thermal performance of a double pipe heat exchanger in turbulent flow conditions

Sanserwal

Yadav

BHARDWAJ

et al. 2022

International Journal of Thermodynamics

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Heat exchangers with high thermal performance are required for industrial applications. Using heat transfer methodology in conjunction with simple design changes and assembly functions of heat exchangers could be an effective way to accomplish this. An experimental analysis was performed in this study to improve the heat transfer performance of a double pipe heat exchanger by implanting a flat strip spring turbulator (FST) within the heat exchanger's inner tube. The experimental investigation of the Double pipe heat exchanger in conjunction with three sets of FST turbulators (pitch: 15 cm, 10 cm, and 5 cm) for turbulent flow (Re 9000-38000) was carried out. The Nusselt number, friction factor ratio, and thermal performance factor of heat exchangers with FST at various pitches are found to be between 60 and 170, 1.44 and 1.76, and 0.94 and 1.06, respectively. The highest heat transfer achieved by using a flat spring turbulator is 20% for a pitch value of 5cm. In comparison to other sets of FST, a double pipe heat exchanger with FST pitch value of 10 cm has greater thermohydraulic performance. When compared to previous research, the experimental results obtained from this work at higher Reynolds numbers the friction factor are within a well-accepted range.

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Effect of square wing with combined solid ring twisted tape inserts on heat transfer and fluid flow of a circular tube heat exchanger

Cited by 8 publications

References 42 publications

Improvement of Heat Transfer Through Use of Twisted Tape Inserts: A Review

Improvement of Heat Transfer Through Use of Twisted Tape Inserts: A Review

Parametric optimization of heat exchanger tube having twisted tape turbulent promoters and silicon oxide nanofluid

Enhancing the thermal performance of a double pipe heat exchanger in turbulent flow conditions

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