Heat transfer augmentation in double pipe heat exchanger using mechanical turbulators

Kamboj, Kushal; Singh, Gurjeet; Sharma, Rohit; Panchal, Dilbagh; Hira, Jaspreet

doi:10.1007/s00231-016-1838-x

Cited by 15 publications

(7 citation statements)

References 10 publications

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“…The most effective geometry is found as a divergent ring with an efficiency of 197 to 333%. Kambojet al [29] has performed experiments using divergent convergent spring-type turbulator.…”

Section: Heat Transfer Improvement Methodsmentioning

confidence: 99%

Heat transfer enhancement in double-pipe heat exchanger: A review

Singh

Chauhan

Shukla

2022

J. Phys.: Conf. Ser.

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Due to the wide need for heat transfer improvement in heat exchangers, it always stands a challenging field to grow effective and efficient heat transfer equipment with qualities of cost-effectiveness, reduced size, and maximum usage in a wide variety of applications under several operating conditions. The heat exchangers are mostly used to fulfil the requirements of high heat dissipation in industries. In this review article, a focused analysis is done on heat transfer improvement in double-pipe heat exchangers using different geometries in the flow, and heat transfer characteristics are also taken into consideration for the analysis. Many researchers have already analyzed a double-pipe heat exchanger as an experimental unit and with the help of simulation. Several past studies are examined and concluded to build an effective system using a heat exchanger. The significance of Prandtl number, Reynolds number, Nusselt number, and pressure drop coefficient quantities are shown in the studies. A close concern on nanoparticles in inside pipe is also studied for heat transfer improvisation using a double-pipe heat exchanger. New outcomes are perfectly verified and assist in the investigation of various other studies.

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“…The most effective geometry is found as a divergent ring with an efficiency of 197 to 333%. Kambojet al [29] has performed experiments using divergent convergent spring-type turbulator.…”

Section: Heat Transfer Improvement Methodsmentioning

confidence: 99%

Heat transfer enhancement in double-pipe heat exchanger: A review

Singh

Chauhan

Shukla

2022

J. Phys.: Conf. Ser.

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“…where Nu 0 and f 0 are the Nusselt number and friction factor of the smooth tube, respectively. Based on the method of Schultz and Cole [23], the maximal uncertainties of the Re, f, nd Nu were 1.19%, 2.32%, and 1.66%, respectively.…”

Section: Data Simplification and Uncertainty Analysismentioning

confidence: 99%

Experimental and Numerical Investigations on Thermal-Hydraulic Performance of Three-Dimensional Overall Jagged Internal Finned Tubes

Huang,

Deng,

Chen

et al. 2024

Micromachines

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To satisfy the demand for efficient heat transfer, a novel three-dimensional overall jagged internal finned tube (3D-OJIFT) was fabricated, using the rolling–ploughing/extruding method. The thermal performance of the 3D-OJIFT were studied and compared in experiments and three-dimensional numerical simulations. The RNG k-ε turbulence model is well verified with the experimental results. By analyzing the distributions of velocity, temperature, and turbulence kinetic energy, it was found that the 3D-OJIFT destroyed the development of the velocity and thermal boundary layers, increased the turbulence disturbance, and reduced the temperature gradient, thus improving the heat transfer. The influences of the jagged height and jagged spiral angle of the 3D-OJIFT are discussed. The Nu and f increased as the jagged height of the 3D-OJIFT increased. The Nusselt number of the 3D-OJIFT was 1.67–2.04 times the value for the smooth tube. In addition, the comprehensive heat transfer performance of the 3D-OJIFT improved after increasing the jagged spiral angle. Compared with conventional internal helical-finned tubes and other reinforcement structures reported in the literature, the 3D-OJIFT demonstrated better comprehensive heat transfer performance. Finally, empirical correlations of the 3D-OJIFT were obtained.

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“…When only heat transfer capacity of heat exchanger is criteria regardless of pressure drop or pumping power the twisted tape is more superior as compared with smooth tube (1.6 to 1.8 times). On equal pressure drop and equal pumping power basis the smooth tube is better to twisted tape ( [11], experimentally investigated on heat transfer augmentation in double pipe heat exchanger using mechanical turbulators. The Nusselt number is found to be enhanced by 11.46, 17.88 and 26.76 % with DCST-C pitches P = 15, 10 and 5 cm, vis-à-vis plain tube.…”

Section: International Conference On Science and Engineering For Sustmentioning

confidence: 99%