Experimental characterization of a double tube heat exchanger with different corrugated tubes and shells

Moya-Rico, J.D.; Molina, A.E.; Córcoles, J.I.; Almendros-Ibáñez, J.A.

doi:10.1016/j.ijthermalsci.2022.107640

Cited by 16 publications

(3 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…They found that the discontinuous helicoidal turbulators have lower pressure losses and turbulent kinetic energy. Moya-Rico et al 29 studied the impact of DTHX on thermohydraulic performance using a water/sugar solution with smooth and corrugated tubes. The results highlighted an increment of 19% compared to the smooth tube.…”

Section: Introductionmentioning

confidence: 99%

Enhancing heat transfer in double tube heat exchanger by nail rod inserts: numerical and experimental study

Marzouk,

Sharaf,

Almehmadi

et al. 2024

Preprint

View full text Add to dashboard Cite

Double-tube heat exchanger (DTHX) is extensively utilized in many applications because of their small size, easy maintenance, and suitability for high-pressure applications. In this study, the heat transfer enhancement in a DTHX is studied experimentally and numerically by adding a nail rod insert (NRI). The study is performed with a steel nails rod insert 1000 mm long and a turbulence flow with a Reynolds number ranging from 3200 to 5700. Three different pitches of NRI such as 100 mm, 50 mm, and 25 mm are investigated. The attained results reveal that inserting nail rods raises the Nu number, and additional improvement can be attained by reducing pitch length. Nu number enhancement ratios for 25 mm pitch NRI are 1.81–1.9 times higher than the plain tube. Pressure drop rises in all configurations with NRI due to turbulence and obstructive NRI area. Among various pitch lengths, 25 mm exhibits the highest values of pressure drop where these values are overlooked concerning potential heat transfer improvements. Exergy efficiency rises across all cases with NRI, correlating with increased heat transfer, resulting in a 128% improvement in exergy efficiency for 25 mm pitch length. The numerical findings elucidate that the novel insert augments flow turbulence with secondary flows, thereby improving heat transfer in DTHX. A comprehensive analysis is presented with temperature, velocity, and pressure drop distributions from the numerical results.

show abstract

Section: Introductionmentioning

confidence: 99%

Enhancing heat transfer in double tube heat exchanger by nail rod inserts: numerical and experimental study

Marzouk,

Sharaf,

Almehmadi

et al. 2024

Preprint

View full text Add to dashboard Cite

show abstract

“…One of these approaches is based on making changes in the geometry of the heat exchanger in such a way that it can affect the flow regime and the boundary layer to increase the heat transfer coefficient. For example, in the case of DPHXs, using corrugated tubes [6,7], twisted oval tubes [8,9], twisted tape turbulators [10,11], helical wire inserts [12], swirl elements [13],…”

Section: Introductionmentioning

confidence: 99%

Nanofluid as the working fluid of an ultrasonic-assisted double-pipe counter-flow heat exchanger

Hedeshi

Jalali

Arabkoohsar

et al. 2023

J Therm Anal Calorim

View full text Add to dashboard Cite

General rightsCopyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights. Users may download and print one copy of any publication from the public portal for the purpose of private study or research.  You may not further distribute the material or use it for any profit-making activity or commercial gain  You may freely distribute the URL identifying the publication in the public portal If you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim.

show abstract

“…They found that the discontinuous helicoidal turbulators have lower pressure losses and turbulent kinetic energy. Moya-Rico et al 44 studied the impact of DTHX on thermo-hydraulic performance using a water/sugar solution with smooth and corrugated tubes. The results highlighted an increment of 19% compared to the smooth tube.…”

mentioning

confidence: 99%

Numerical and experimental investigation of heat transfer enhancement in double tube heat exchanger using nail rod inserts

Marzouk,

Almehmadi,

Aljabr

et al. 2024

Sci Rep

View full text Add to dashboard Cite

The Double-tube heat exchanger (DTHX) is widely favored across various industries due to its compact size, low maintenance requirements, and ability to operate effectively in high-pressure applications. This study explores methods to enhance heat transfer within a DTHX using both experimental and numerical approaches, specifically by integrating a nail rod insert (NRI). A steel nails rod insert, 1000 mm in length, is introduced into the DTHX, which is subjected to turbulent flows characterized by Reynolds numbers ranging from 3200 to 5700. Three different pitches of NRI (100 mm, 50 mm, and 25 mm) are investigated. The results indicate a significant increase in the Nusselt (Nu) number upon the insertion of nail rods, with further improvements achievable by reducing the pitch length. Particularly noteworthy is the Nu number enhancement ratio for the 25 mm pitch NRI, which is 1.81–1.9 times higher than that for the plain tube. However, it is observed that pressure drop increases in all configurations with NRI due to heightened turbulence and obstruction by the NRI. Among the various pitch lengths, the 25 mm pitch exhibits the highest pressure drop values. Moreover, exergy efficiency is found to improve across all cases with NRI, corresponding to increased heat transfer, with the 25 mm pitch length showing a remarkable 128% improvement. Numerical analysis reveals that the novel insert enhances flow turbulence through the generation of secondary flows, thereby enhancing heat transfer within the DTHX. This study provides a comprehensive analysis, including temperature, velocity, and pressure drop distributions derived from numerical simulations.

show abstract

Experimental characterization of a double tube heat exchanger with different corrugated tubes and shells

Cited by 16 publications

References 30 publications

Enhancing heat transfer in double tube heat exchanger by nail rod inserts: numerical and experimental study

Enhancing heat transfer in double tube heat exchanger by nail rod inserts: numerical and experimental study

Nanofluid as the working fluid of an ultrasonic-assisted double-pipe counter-flow heat exchanger

Numerical and experimental investigation of heat transfer enhancement in double tube heat exchanger using nail rod inserts

Contact Info

Product

Resources

About