Determining the influence of geometric factors and the type of heat carrier on the thermal resistance of miniature two-phase thermosyphons
DOI:
https://doi.org/10.15587/1729-4061.2022.263180Keywords:
miniature thermosiphon, heat transfer intensity, thermal resistance, heat flux, heat carrier, filling coefficientAbstract
This paper reports experimental data on the total thermal resistance of copper two-phase thermosiphons with internal diameters of 3 mm, 5 mm, and 9 mm, 700 mm long. Water, ethanol, methanol, and freon-113 were used as heat carriers. During the study, thermosiphons were located vertically. The length of the heating zone varied from 45 mm to 200 mm while the length of the condensation zone was constant and equaled 200 mm. The filling coefficient of thermosiphons varied from 0.3 to 2.0. Two series of experiments were conducted. The first series was distinguished by the fact that the filling coefficient of three thermosiphons with an internal diameter of 9 mm varied from 0.3 to 0.8 with the same length of the heating zone of 200 mm. The second series of experiments was carried out on thermosiphons with internal diameters of 3 mm and 5 mm. With the same amount of heat carrier, the length of the heating zone changed from 45 mm to 200 mm. As a result of research, it was determined that the total thermal resistance of thermosiphons is influenced by both their geometric factors (internal diameter and filling coefficient) and the type of heat carrier. The main factor that influenced the value of thermal resistance was also the transmitted heat flux. An increase in heat flow led to a significant decrease in thermal resistance. The maximum heat flux was determined with minimal thermal resistance. To calculate the value of the thermal resistance of thermosiphons, two dimensionless dependences were derived, which hold for two ranges of Reynolds numbers. For small Reynolds numbers (until 2000), which characterize the beginning of the action of vaporization centers and their gradual increase, the degree indicator was –0.8, and for larger Reynolds numbers, up to critical phenomena, the degree indicator was at the level of –0.3.
References
- Bezrodniy, M. K., Pioro, I. L., Kostyuk, T. O. (2005). Protsessy perenosa v dvukhfaznykh termosifonnykh sistemakh. Teoriya i praktika. Kyiv: «Fakt», 704.
- Reay, D. A., Kew, P.A., McGlen R. J. (2014). Heat Pipes. Theory, Design and Applications. Butterworth-Heinemann. doi: https://doi.org/10.1016/c2011-0-08979-2
- Jouhara, H., Robinson, A. J. (2010). Experimental investigation of small diameter two-phase closed thermosyphons charged with water, FC-84, FC-77 and FC-3283. Applied Thermal Engineering, 30 (2-3), 201–211. doi: https://doi.org/10.1016/j.applthermaleng.2009.08.007
- Juhara, H., Martinet, O., Robinson, A. J. (2008). Experimental study of small diameter thermosyphons charged with water, FC-84, FC-77 and FC-3283. 5-th European thermal-sciences conference.
- Kannan, M., Senthil, R., Baskaran, R., Deepanraj, B. (2014). An experimental study on heat transport capability of a two phase thermosyphon charged with different working fluids. American Journal of Applied Sciences, 11 (4), 584–591. doi: https://doi.org/10.3844/ajassp.2014.584.591
- Imura, H., Kusada, H., Oyata, J., Miyazaki, T., Sakamoto, N. (1977). Heat transfer in two-phase closed-type thermosyphons. Transactions of Japan Society of Mechanical Engineers, 22, 485–493.
- Noie, S. H. (2005). Heat transfer characteristics of a two-phase closed thermosyphon. Applied Thermal Engineering, 25 (4), 495–506. doi: https://doi.org/10.1016/j.applthermaleng.2004.06.019
- Alammar, A. A., Al-Dadah, R. K., Mahmoud, S. M. (2016). Numerical investigation of effect of fill ratio and inclination angle on a thermosiphon heat pipe thermal performance. Applied Thermal Engineering, 108, 1055–1065. doi: https://doi.org/10.1016/j.applthermaleng.2016.07.163
- Khazaee, I., Hosseini, R., Noie, S. H. (2010). Experimental investigation of effective parameters and correlation of geyser boiling in a two-phase closed thermosyphon. Applied Thermal Engineering, 30 (5), 406–412. doi: https://doi.org/10.1016/j.applthermaleng.2009.09.012
- Kravets, V. YU., Pis'menniy, E. N., Kon'shin, V. I. (2009). Pul'satsionnye yavleniya v zakrytykh dvukhfaznykh termosifonakh. Zbirnyk nauk. prats SNUIaE ta P, 4 (32), 39–46.
- Alammar, A. A., Al-Dadah, R. K., Mahmoud, S. M. (2018). Effect of inclination angle and fill ratio on geyser boiling phenomena in a two-phase closed thermosiphon – Experimental investigation. Energy Conversion and Management, 156, 150–166. doi: https://doi.org/10.1016/j.enconman.2017.11.003
- Kravetz, V. Y., Alekseik, O. S. (2012). Boiling heat-transfer intensity on small-scale surface. International Review of Mechanical Engineering (I.RE.M.E.), 6 (3), 479–484. Available at: https://www.researchgate.net/publication/288306730_Boiling_heat-transfer_intensity_on_small-scale_surface
- Prisniakov, K., Marchenko, O., Melikaev, Yu., Kravetz, V., Nikolaenko, Yu., Prisniakov, V. (2003). About Complex Influence of Vibrations and Gravitational Fields on Serviceability of Heat Pipes in Composition of the Space-Rocket Systems. 54th International Astronautical Congress of the International Astronautical Federation, the International Academy of Astronautics, and the International Institute of Space Law. doi: https://doi.org/10.2514/6.iac-03-i.1.10
- Chi, C. (1981). Teplovye truby. Teoriya i praktika. Moscow: Mashinostroenie, 207.
- Ivanovskiy, M. N., Sorokin, V. P., YAgodkin, I. V. (1978). Fizicheskie osnovy teplovykh trub. Moscow: Atomizdat, 256.
- Robinson, A. J., Smith, K., Hughes, T., Filippeschi, S. (2020). Heat and mass transfer for a small diameter thermosyphon with low fill ratio. International Journal of Thermofluids, 1-2, 100010. doi: https://doi.org/10.1016/j.ijft.2019.100010
- Jafari, D., Franco, A., Filippeschi, S., Di Marco, P. (2016). Two-phase closed thermosyphons: A review of studies and solar applications. Renewable and Sustainable Energy Reviews, 53, 575–593. doi: https://doi.org/10.1016/j.rser.2015.09.002
- Pis’mennyi, E. N., Khayrnasov, S. M., Rassamakin, B. M. (2018). Heat transfer in the evaporation zone of aluminum grooved heat pipes. International Journal of Heat and Mass Transfer, 127, 80–88. doi: https://doi.org/10.1016/j.ijheatmasstransfer.2018.07.154
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