Parametrik Nanoakışkanlar Kullanılarak Farklı Koşullar Altında Çalışan Bir Yerçekimi-Destekli Isı Borusunun Isı Transfer Verimliliğinin Deneysel İncelenmesi

Abstract

Yüksek termal iletkenlik katsayıları ve düşük termal direnç özellikleri nedeniyle ısı transfer sistemlerinde performansı artıran önemli bir yenilik olarak nanoakışkanlar dikkat çekmektedir. Bu çalışmada, ısı borusunun evaporatör bölgesinden ısıyı çekmek için %0,5 alümina (Al2O3), titanyum dioksit (TiO2) ve bakır(II) oksit (CuO) kullanılarak saf su bazlı nanoakışkanlar hazırlanmıştır. Ayrıca, nanoakışkanı stabilize etmek için sodyum dodesilbenzen sülfonat yüzey aktif maddesi kullanılmıştır. Deneysel çalışmada, ısı borusuna su ceketi entegre edilmesinin ve farklı miktarlarda çalışma sıvısı (nanoakışkan) kullanılmasının ısı transferi üzerindeki etkileri ayrı ayrı incelenmiştir. Sonuçlar, CuO nanoakışkanının en düşük R-değerini gösterdiğini ve Al2O3 nanoakışkanına kıyasla %4,64, TiO2 nanoakışkanına kıyasla ise %8,77 daha iyi termal performans sergilediğini göstermiştir. Bu çalışma, enerji verimliliği gerektiren endüstriyel uygulamalar için sürdürülebilir bir çözüm sunmayı ve alandaki bilgi birikimine katkıda bulunarak daha ileri araştırmalar için zemin hazırlamayı amaçlamaktadır.

Keywords

• Nanoakışkan
• alümina
• titanyum dioksit
• bakır(II) oksit
• ısı borusu

Supporting Institution

Kütahya Dumlupınar Üniversitesi

Project Number

Kütahya Dumlupınar Üniversitesi Bilimsel Araştırma Projeleri 2025-06

Thanks

Bu araştırma, Kütahya Dumlupınar Üniversitesi Bilimsel Araştırma Projeleri Koordinasyon Ofisi tarafından 2025-06 numaralı hibe kapsamında desteklenmiştir.

Experimental Investigation of Heat Transfer Efficiency of a Gravity-Assisted Heat Pipe Operating Under Different Conditions Using Parametric Nanofluids

Abstract

Nanofluids are attracting attention as a significant innovation that improves performance in heat transfer systems due to their high thermal conductivity coefficient and low thermal resistance properties. In this study, pure water-based nanofluids were prepared using 0.5% alumina (Al2O3), titanium dioxide (TiO2), and copper (II) oxide (CuO) to extract heat from the evaporator region of a gravity-assisted heat pipe. Additionally, sodium dodecylbenzene sulfonate surfactant was used to stabilize the nanofluid. In the experimental study, the effects of integrating a water jacket into the gravity-assisted heat pipe and using different amounts of working fluids (nanofluids) on heat transfer were investigated separately. According to results, the lowest R value was found to be 0.1846 at the 80ml and 100ml volume ratios using CuO nanofluid, while the second lowest R value was calculated to be 0.1932 at the 80ml volume ratio using Al2O3 nanofluid. The results also showed that the CuO nanofluid exhibited the lowest R-value, demonstrating better thermal performance by 4.64% compared to the Al2O3 nanofluid and by 8.77% compared to the TiO2 nanofluid. This study aims to provide a sustainable solution for industrial applications requiring energy efficiency and to contribute to the body of knowledge in the field, laying the groundwork for further research.

Keywords

• Nanofluids
• alumina
• titanium dioxide
• copper (II) oxide
• heat pipes

Supporting Institution

Kutahya Dumlupınar University

Project Number

Kütahya Dumlupınar Üniversitesi Bilimsel Araştırma Projeleri 2025-06

Thanks

This research has been supported by Kutahya Dumlupınar University Scientific Research Projects Coordination Office under grant number 2025-06.

References

1. Alphonse, P., Muthukumarasamy, K., Elumalai, S., Kadamban, M., & Dhairiyasamy, R. (2025). Optimization of heat transfer in heat pipes using nanofluids at various inclinations and filling levels. Case Studies in Thermal Engineering, 65, 105624.
2. Arat, H., Arslan, O., Ercetin, U., & Akbulut, A. (2021). A comprehensive numerical investigation of unsteady-state two-phase flow in gravity assisted heat pipe enclosure. Thermal Science and Engineering Progress, 25, 100993.
3. Arat, H., Arslan, O., Ercetin, U., & Akbulut, A. (2021). Experimental study on heat transfer characteristics of closed thermosyphon at different volumes and inclination angles for variable vacuum pressures. Case Studies in Thermal Engineering, 26, 101117.
4. Arat, H., & Arslan, O. (2025). A new conceptual design of flat-plate solar collector based on two-phased closed thermosyphon: CFD-based exergetic optimization. Solar Energy, 300, 113873.
5. Bahar, A., Ghafouri, J., & Zamzamian, K. (2025). A numerical investigation into the application of thermosyphons for preventing the freezing of water meters, utilizing pure water and different nanofluids. International Journal of Thermofluids, 26, 101088.
6. Chen, Y. J., Wang, P. Y., Liu, Z. H., & Li, Y. Y. (2013). Heat transfer characteristics of a new type of copper wire-bonded flat heat pipe using nanofluids. International Journal of Heat and Mass Transfer, 67, 548-559.
7. Chilbule, P. V., Dhole, L. P., & Chavhan, G. R. (2024). Optimization of heat pipe charged with CuO nanofluid using Taguchi technique. Materials Today: Proceedings, 103, 303-313.
8. Choi, S. U., & Eastman, J. A. (1995, November). Enhancing thermal conductivity of fluids with nanoparticles. In ASME International Mechanical Engineering Congress and Exposition (Vol. 17421, pp. 99-105). American Society of Mechanical Engineers.

9. Çiftçi, E., Sözen, A., & Karaman, E. (2016). TiO2 İçeren Nanoakışkan Kullanımının Isı Borusu Performansına Etkisinin Deneysel Olarak İncelenmesi, sayfa: 367-376. Politeknik Dergisi, 19(3), 367-376.
10. Das, S. K., Choi, S. U., & Patel, H. E. (2006). Heat transfer in nanofluids—a review. Heat Transfer Engineering, 27(10), 3-19.
11. Eastman, J. A., Choi, U. S., Li, S., Thompson, L. J., & Lee, S. (1996). Enhanced thermal conductivity through the development of nanofluids. MRS Online Proceedings Library (OPL), 457, 3.
12. Eidan, A. A., Alsahlani, A., Alshukri, M. J., & Alsabery, A. I. (2023). Experimental investigation of a solar evacuated tube collector embedded with a heat pipe using different nanofluids and controlled mechanical exciting pulsations. International Journal of Thermofluids, 20, 100415.
13. Han, X., & Wang, Y. (2018). Experimental investigation of the thermal performance of a novel concentric tube heat pipe heat exchanger. International Journal of Heat and Mass Transfer, 127, 1338-1342.
14. Huminic, G., Huminic, A., Morjan, I., & Dumitrache, F. (2011). Experimental study of the thermal performance of thermosyphon heat pipe using iron oxide nanoparticles. International journal of heat and mass transfer, 54(1-3), 656-661.
15. Jose, J., & Hotta, T. K. (2024). Thermal performance analysis and optimization of a heat pipe-based electronic thermal management system using experimental data-driven neuro-genetic technique. Thermal Science and Engineering Progress, 54, 102860.
16. Jouhara, H., Chauhan, A., Nannou, T., Almahmoud, S., Delpech, B., & Wrobel, L. C. (2017). Heat pipe based systems-Advances and applications. Energy, 128, 729-754.
17. Kargaran, M., Goshayeshi, H. R., Saleh, S. R., Zahmatkesh, I., & Chaer, I. (2024). Energy and exergy analysis of photovoltaic systems integrated with pulsating heat pipe and hybrid nanofluids. Thermal Science and Engineering Progress, 55, 102975.
18. Reji, A. K., Kumaresan, G., Sarathi, A., Saiganesh, A. G., Kumar, R. S., & Shelton, M. M. (2021). Performance analysis of thermosyphon heat pipe using aluminum oxide nanofluid under various angles of inclination. Materials Today: Proceedings, 45, 1211-1216.
19. Sarafraz, M. M., Hormozi, F., & Peyghambarzadeh, S. M. (2014). Thermal performance and efficiency of a thermosyphon heat pipe working with a biologically ecofriendly nanofluid. International Communications in Heat and Mass Transfer, 57, 297-303.
20. Sarafraz, M. M., Pourmehran, O., Yang, B., & Arjomandi, M. (2019). Assessment of the thermal performance of a thermosyphon heat pipe using zirconia-acetone nanofluids. Renewable Energy, 136, 884-895.
21. Smaisim, G. F., Al-Madhhachi, H., & Abed, A. M. (2022). Study the thermal management of Li-ion batteries using looped heat pipes with different nanofluids. Case Studies in Thermal Engineering, 37, 102227.
22. Xiao, Y., Gao, L. H., Meng, X., Liu, J. W., Lu, X., Tian, Y., & Shu, C. M. (2023). Thermal removal from coal fires by a two-phase closed thermosyphon with a CuO nanofluid. Case Studies in Thermal Engineering, 42, 102745.
23. Xu, Q., Liu, L., Feng, J., Qiao, L., Yu, C., Shi, W., ... & Ding, Y. (2020). A comparative investigation on the effect of different nanofluids on the thermal performance of two-phase closed thermosyphon. International Journal of Heat and Mass Transfer, 149, 119189.
24. Wan, D. Y., Li, J., Chen, Y. C., Tang, Q., Hong, J., Wang, W. W., ... & Guo, J. H. (2022). Experimental investigation and semi-empirical correlations for a pulsating heat pipe filling with hybrid nanofluids applied for low-grade energy recovery. Case Studies in Thermal Engineering, 40, 102503.
25. Wang, Z., Zhang, H., Yin, L., Yang, D., Yang, G., Akkurt, N., ... & Xiong, Y. (2022). Experimental study on heat transfer properties of gravity heat pipes in single/hybrid nanofluids and inclination angles. Case Studies in Thermal Engineering, 34, 102064.
26. Wang, Q., Yu, C., Li, T., Wang, J., Liu, Y., Shi, Y., ... & Niu, Y. (2024). Enhancing the performance of PVT-TEG power generation systems by heat pipes and Fe3O4 nanofluids. Energy Conversion and Management, 319, 118938.
27. Yıldızay, H. D., Bekmezci, M., & Şen, F. (2025). Nanofluids and engineering applications: A review. Journal of Scientific Reports-A, (060), 126-149.
28. Yu, W., France, D. M., Routbort, J. L., & Choi, S. U. (2008). Review and comparison of nanofluid thermal conductivity and heat transfer enhancements. Heat Transfer Engineering, 29(5), 432-460.