Enhancing the thermal performance of double-pipe heat exchangers using wire coil inserts: A focused review
Double-pipe heat exchangers are widely used in industrial applications due to their simplicity and efficiency. To further enhance thermal performance, passive techniques such as wire coil inserts have been extensively studied. This first-of-its-kind review explores the enhancement of thermal perform...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-09-01
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| Series: | Scientific African |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2468227625003667 |
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| author | Saif Ali Kadhim Rassol Hamed Rasheed Karrar A. Hammoodi Ali M. Ashour Farhan Lafta Rashid Muntadher Mohammed Ali Saeed Abdallah Bouabidi Shahin Shoeibi Walid Aich Mustafa M. Hasan |
| author_facet | Saif Ali Kadhim Rassol Hamed Rasheed Karrar A. Hammoodi Ali M. Ashour Farhan Lafta Rashid Muntadher Mohammed Ali Saeed Abdallah Bouabidi Shahin Shoeibi Walid Aich Mustafa M. Hasan |
| author_sort | Saif Ali Kadhim |
| collection | DOAJ |
| description | Double-pipe heat exchangers are widely used in industrial applications due to their simplicity and efficiency. To further enhance thermal performance, passive techniques such as wire coil inserts have been extensively studied. This first-of-its-kind review explores the enhancement of thermal performance in double-pipe heat exchangers using wire coil inserts. It examines various geometrical parameters, placements (in both inner and outer tubes), and working fluids. Results indicate that wire coil inserts can increase the Nusselt number by up to 400 %, with thermal performance factors reaching 4, depending on operating conditions, insertion method, and incorporating other techniques such as nanofluids and active methods. Despite the enhancement, friction factors also increased by 2–7 times, highlighting the need to balance between heat transfer improvement and pressure loss. Insets in the inner tube generally outperformed outer tube inserts, particularly at lower pitch-to-diameter ratios. Numerical simulations using the SST k-ω turbulence model showed strong agreement with experimental data, with prediction errors under ±10 %. The review critically compares enhancement techniques, evaluates computational fluid dynamics modeling approaches, and identifies gaps in hybrid insert applications use and outer tube design. This work serves as a practical reference for optimizing insert configurations and simulation strategies in advanced heat exchanger design. |
| format | Article |
| id | doaj-art-fe193c30445040669c7976840a382cae |
| institution | Kabale University |
| issn | 2468-2276 |
| language | English |
| publishDate | 2025-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Scientific African |
| spelling | doaj-art-fe193c30445040669c7976840a382cae2025-08-25T04:14:38ZengElsevierScientific African2468-22762025-09-0129e0289610.1016/j.sciaf.2025.e02896Enhancing the thermal performance of double-pipe heat exchangers using wire coil inserts: A focused reviewSaif Ali Kadhim0Rassol Hamed Rasheed1Karrar A. Hammoodi2Ali M. Ashour3Farhan Lafta Rashid4Muntadher Mohammed Ali Saeed5Abdallah Bouabidi6Shahin Shoeibi7Walid Aich8Mustafa M. Hasan9College of Mechanical Engineering, University of Technology- Iraq, Baghdad, Iraq; Corresponding authors.Air Conditioning Engineering Department, Faculty of Engineering, Warith Al-Anbiyaa University, Iraq; Department of Renewable Energy Techniques, Karbala Technical Institute, Al-Furat Al-Awsat Technical University (ATU), Karbala, IraqCollege of Engineering, University of Al Maarif, Al Anbar, 31001, IraqCollege of Mechanical Engineering, University of Technology- Iraq, Baghdad, IraqPetroleum Engineering Department, University of Kerbala, Karbala, IraqEngineering Technical College/ Najaf, Al-Furat Al-Awsat Technical University, 31001 Najaf, IraqLaboratory of Mechanical Modelling, Energy & Materials (LM2EM), LR24ES23, National Engineering School of Gabes (ENIG), University of Gabes, Gabes TunisiaDepartment of Mechanical Engineering, Semnan Branch, Islamic Azad University, Semnan, IranDepartment of Mechanical Engineering, College of Engineering, University of Ha’il, Ha’il City 81451, Saudi ArabiaInstitute of Mathematics, University of Miskolc, Miskolc, Hungary; Department of Mechanical Power Techniques, Basra Technological Technical Institute, Southern Technical University, Basra, Iraq; Corresponding authors.Double-pipe heat exchangers are widely used in industrial applications due to their simplicity and efficiency. To further enhance thermal performance, passive techniques such as wire coil inserts have been extensively studied. This first-of-its-kind review explores the enhancement of thermal performance in double-pipe heat exchangers using wire coil inserts. It examines various geometrical parameters, placements (in both inner and outer tubes), and working fluids. Results indicate that wire coil inserts can increase the Nusselt number by up to 400 %, with thermal performance factors reaching 4, depending on operating conditions, insertion method, and incorporating other techniques such as nanofluids and active methods. Despite the enhancement, friction factors also increased by 2–7 times, highlighting the need to balance between heat transfer improvement and pressure loss. Insets in the inner tube generally outperformed outer tube inserts, particularly at lower pitch-to-diameter ratios. Numerical simulations using the SST k-ω turbulence model showed strong agreement with experimental data, with prediction errors under ±10 %. The review critically compares enhancement techniques, evaluates computational fluid dynamics modeling approaches, and identifies gaps in hybrid insert applications use and outer tube design. This work serves as a practical reference for optimizing insert configurations and simulation strategies in advanced heat exchanger design.http://www.sciencedirect.com/science/article/pii/S2468227625003667Double-pipe heat exchangerWire coilNusselt numberFriction factorThermal performance factor |
| spellingShingle | Saif Ali Kadhim Rassol Hamed Rasheed Karrar A. Hammoodi Ali M. Ashour Farhan Lafta Rashid Muntadher Mohammed Ali Saeed Abdallah Bouabidi Shahin Shoeibi Walid Aich Mustafa M. Hasan Enhancing the thermal performance of double-pipe heat exchangers using wire coil inserts: A focused review Scientific African Double-pipe heat exchanger Wire coil Nusselt number Friction factor Thermal performance factor |
| title | Enhancing the thermal performance of double-pipe heat exchangers using wire coil inserts: A focused review |
| title_full | Enhancing the thermal performance of double-pipe heat exchangers using wire coil inserts: A focused review |
| title_fullStr | Enhancing the thermal performance of double-pipe heat exchangers using wire coil inserts: A focused review |
| title_full_unstemmed | Enhancing the thermal performance of double-pipe heat exchangers using wire coil inserts: A focused review |
| title_short | Enhancing the thermal performance of double-pipe heat exchangers using wire coil inserts: A focused review |
| title_sort | enhancing the thermal performance of double pipe heat exchangers using wire coil inserts a focused review |
| topic | Double-pipe heat exchanger Wire coil Nusselt number Friction factor Thermal performance factor |
| url | http://www.sciencedirect.com/science/article/pii/S2468227625003667 |
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