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Journals / Politeknik Dergisi / 2026 / Cilt: 29 Sayı: 4

Comparison of The Effects of Magnetite Nanoparticles on Performance in A Finned And Finless Liquid-Air Heat Exchanger

Manyetit Nanopartiküllerin Kanatçıklı ve Kanatçıksız Sıvı-Hava Isı Eşanjöründe Performansa Etkisinin Karşılaştırılması

Fauzı Shtewı(KARABÜK ÜNİVERSİTESİ)0000-0002-4846-1776
Mehmet Özkaymak(KTO KARATAY ÜNİVERSİTESİ)0000-0002-4575-8988
Khaled Ali Hagig(KARABUK UNIVERSITY)0000-0001-5359-5608
Abdel Karim Amar Fahed(JANZUR FACULTY)0000-0003-1995-7630
Faruk Kılıç(NATIONAL DEFENSE UNIVERSITY, NATIONAL DEFENCE AND SECURITY INSTITUTE)0000-0002-9978-1972
Mustafa Göktaş(GAZİ ÜNİVERSİTESİ, ANKARA MESLEK YÜKSEKOKULU, TEKNİK PROGRAMLAR BÖLÜMÜ)0000-0001-8742-9114
Nurettin Eltuğral(KARABUK UNIVERSITY)0000-0001-6393-9611
Mustafa Aktaş(GAZI UNIVERSITY)0000-0003-1187-5120
Pages
1–12
Publication Date
2026-06-09
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

For different Reynolds numbers and a constant volumetric concentration of nanofluid, the results demonstrate that the finned tube heat exchanger outperforms the plain tube heat exchanger thermally by a factor of 90 to 95%.

📌 3 Key Takeaways

🎯
Objective & Hypothesis:Efforts are being made to improve heat transfer efficiency in many different contexts, with the help of nanofluids and expanded surfaces, among other things.
📊
Key Findings & Data:The pressure drop and convective heat transfer enhancement are studied for a nanofluid moving in a horizontal circular tube with internal longitudinal fins under laminar conditions (249 < Re < 3000).
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Conclusion & Impact:For different Reynolds numbers and a constant volumetric concentration of nanofluid, the results demonstrate that the finned tube heat exchanger outperforms the plain tube heat exchanger thermally by a factor of 90 to 95%.
🔬Design:Araştırma Makalesi
📍Scope:Comprehensive Sample
⚙️Variables:finned tube · Fe3O4 nanoparticles · nanofluid

Abstract

Efforts are being made to improve heat transfer efficiency in many different contexts, with the help of nanofluids and expanded surfaces, among other things. Among them, a clever method to enhance heat transmission is to equip heat exchanger tubes with inner fins. The experimental study details the use of a nanofluid of iron oxide and water in a two-tube counterflow heat exchanger that has many longitudinal fins on the inside to induce convective heat transfer. The pressure drop and convective heat transfer enhancement are studied for a nanofluid moving in a horizontal circular tube with internal longitudinal fins under laminar conditions (249 < Re < 3000). Fe3O4 nanoparticles have a volumetric concentration that falls between 0 < φ < 0.5%. For different Reynolds numbers and a constant volumetric concentration of nanofluid, the results demonstrate that the finned tube heat exchanger outperforms the plain tube heat exchanger thermally by a factor of 90 to 95%. The Nusselt number ratio of the Fe3O4 water nanofluid increases with increasing Reynolds number. As the Reynolds number increases, the friction factor decreases and the pressure drop is larger in finned tube heat exchangers compared to plain tube heat exchangers due to the flow resistance provided by the fin form.

Özet

Çeşitli ortamlarda ısı transfer verimliliğini artırmak için nanofluidler ve genişletilmiş yüzeyler kullanmak da dahil olmak üzere çok sayıda girişim devam etmektedir. Bunlar arasında, ısı değiştirici tüplerine iç kanatçıklar eklemek ısı transferini iyileştirmenin akıllıca bir yoludur. Bu çalışma, birkaç iç uzunlamasına kanatçığa sahip çift borulu karşı akışlı bir ısı değiştiricide Fe3O4 -su nanofluidini kullanarak zorlanmış konvektif ısı transferinin deneysel bir araştırmasını açıklamaktadır. Laminer koşullar altında (249 < Re < 3000) iç uzunlamasına kanatçıklara sahip yatay dairesel bir tüpte akan nanofluid için, basınç düşüşü ve konvektif ısı transferi iyileştirmesi incelenmiştir. Fe3O4 nanopartiküllerinin hacimsel konsantrasyonu 0 < φ < 0,5% aralığındadır. Bulgular, kanatçıklı borulu ısı değiştiricinin, sabit hacimsel nanofluid konsantrasyonuna sahip değişen Reynolds sayıları için basit borulu ısı değiştiriciden %90-95 daha yüksek bir termal performans faktörüne sahip olduğunu göstermektedir. Fe3O4 -su nanofluidinin Nusselt sayı oranı Reynolds sayısı arttıkça artar. Çünkü kanatçık şekli akış direnci sağlar, Reynolds sayısı arttıkça sürtünme faktörü azalır ve basınç düşüşü kanatçıklı borulu ısı değiştiricilerde düz borulu ısı değiştiricilere göre daha fazladır.

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Cite This Article

Shtewı, F., Özkaymak, M., Hagig, K. A., Fahed, A. K. A., Kılıç, F., Göktaş, M., Eltuğral, N., Aktaş, M. (2026). Comparison of The Effects of Magnetite Nanoparticles on Performance in A Finned And Finless Liquid-Air Heat Exchanger. Politeknik Dergisi, Cilt: 29 Sayı: 4, 1–12. https://doi.org/10.2339/politeknik.1605687

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