Intensification of heat transfer in the zone of the thermosyphon evaporator when changing the boiling surface shape
https://doi.org/10.29235/1561-8358-2022-67-1-49-56
Abstract
In present paper the influence of the boiling surface treatment types of thermosyphon evaporator on the heat transfer coefficient was studied. An experimental setup «Loop thermosyphon with replacing lower part of the evaporator» has been developed and assembled. This feature makes it easy to replace samples with various surface modifications as the lower part of the evaporator. The description of the experimental setup, equipment and research methods is given. Heat transfer coefficients for the samples at various applied thermal loads (from 5 to 200 W) were calculated. In case of flat aluminum plate (boiling surface) concentric grooves and uneven coating of aluminum oxide particles, an increase of the heat transfer coefficient from h1 = 5760 W/(m2·K) to h2 = 28339 W/(m2·K) at the supplied heat flux density q = 250 kW/m2 was observed. The heat transfer coefficient for a sample without concentric grooves, but with an uneven coating of aluminum oxide particles was h3 = 16952 W/(m2·K) at q = 250 kW/m2. Results of the study can be used for further increase of thermosyphon evaporator efficiency.
About the Authors
M. A. Kuzmich
A.V. Luikov Heat and Mass Transfer Institute of National Academy Sciences of Belarus
Belarus
Belarus
Maxim A. Kuzmich – Junior Researcher
15, P. Brovka Str., 220072, Minsk
A. A. Artsiukh
A.V. Luikov Heat and Mass Transfer Institute of National Academy Sciences of Belarus
Belarus
Belarus
Aliona A. Artsiukh – Engineer
15, P. Brovka Str., 220072, Minsk
References
1. Vasil’ev L.L., Vasil’ev Leonid L., Zhuravlev A. S., Rabetskii M.I., Shapovalov A. V., Rodin A.V. Parodynamic thermosyphons and their use in thermal equipment for various purposes. Teplo- i massoperenos – 2013: sbornik nauchnykh trudov [Heat and Mass Transfer – 2013: Collection of Scientific Papers]. Minsk, 2014, pp. 12–16 (in Russian).
2. Kovalev S.A., Soloviev S.L. Heat transfer model for liquid boiling on a porous surface. Teplofizika vysokikh temperatur = High Temperature, 1984, vol. 22, no. 6, pp. 1166–1171 (in Russian).
3. Tolubinsky V.I. Boiling Heat Transfer. Kiev, Naukova dumka Publ., 1980. 315 p. (in Russian).
4. Dulnev G.N., Tikhonov S.V. Foundations of the Theory of Heat Transfer. St. Petersburg, St. Petersburg State University of Information Technologies, Mechanics and Optics, 2010. 93 p. (in Russian).
5. Mohanty R. L., Das M.K. A critical review on bubble dynamics parameters influencing boiling heat transfer. Renewable and Sustainable Energy Reviews, 2017, vol. 78, pp. 466–494. https://doi.org/10.1016/j.rser.2017.04.092
6. Collier J.G., Thome J.R. Convective Boiling and Condensation. Oxford University Press, 1994. 640 p.
7. Cole R. Bubble frequencies and departure volumes at subatmospheric pressure. AIChE Jornal, 1967, vol. 13, no. 4, pp. 779–783. https://doi.org/10.1002/aic.690130434
8. Wenzel U. Saturated Pool Boiling And Sub-Cooled Flow Boiling Of Mixtures: Ph. D. thesis. University of Auckland, 1992.
9. Kim J., Oh B. D., Kim M.H. Experimental study of pool temperature effects on nucleate pool boiling. International Journal of Multiphase Flow, 2006, vol. 32, no. 2, pp. 208–231. http://dx.doi.org/10.1016 %2Fj.ijmultiphaseflow.2005.09.005
10. Phan H. T., Caney N., Marty P., Colasson S., Gavillet J. How does surface wettability influence nucleate boiling? Effets de la mouillabilité sur l’ébullition en vase. Comptes Rendus Mécanique, 2009, vol. 337, no. 5, pp. 251–259. https://doi.org/10.1016/j.crme.2009.06.032
11. McFadden P.W., Grassmann P. The relation between bubble frequency and diameter during nucleate pool boiling. International Journal of Heat and Mass Transfer, 1962, vol. 5, no. 3–4, pp. 169–173. https://doi.org/10.1016/0017-9310(62)90009-1
12. Zuber N. Nucleate boiling. The region of isolated bubbles and the similarity with natural convection. International Journal of Heat and Mass Transfer, 1963, vol. 6, no. 1, pp. 53–60. https://doi.org/10.1016/0017-9310(63)90029-2
13. Ivey H.J. Relationships between bubble frequency, departure diameter and rise velocity in nucleate boiling. International Journal of Heat and Mass Transfer, 1967, vol. 10, pp. 1023–1040.
14. Kravets V. Yu., Konshin V. I., Pismenniy E.N. Heat-transfer intensity in the heating area of a two-phase thermosyphon. MNPK “Sovremennye informatsionnye i elektronnye tekhnologii”, Odessa, 27–31 maya 2013 g. [MNPK “Modern Information and Electronic Technologies”, Odessa, May 27–31, 2013]. Odessa, 2013, pp. 30–33 (in Russian).
15. Hu H., Xu C., Zhao Y., Ziegler K. J., Chung J.N. Boiling and quenching heat transfer advancement by nanoscale surface modification. Scientific Reports, 2017, vol. 7, p. 6117. https://doi.org/10.1038/s41598-017-06050-0
16. Volodin O.A., Pecherkin N. I., Pavlenko A.N. Intensification of heat transfer during boiling and evaporation of liquids on modified surfaces. Teplofizika vysokikh temperatur [Thermophysics of High Temperatures], 2021, vol. 59, no. 2, pp. 280–312 (in Russian).
17. Litvinenko V. V. Influence of capillary-porous structures on the intensification of heat transfer processes during boiling of liquids. Molodoi uchenyi [Young Scientist], 2019, vol. 7 (245), pp. 113–116 (in Russian).
Review
Views: 369
Email this article 
