To experimentally examine the effect of the heat flux and horizontal rotation angle of the lower tube on the pool boiling heat transfer of the upper tube, a combination of two stainless steel tubes submerged in water at atmospheric pressure was used. As the rotation angle of the lower tube increased from 0° to 90°, the projected area decreased from 100% to 4.8%. This reduction in projected area corresponded to a tendency for the heat transfer coefficient to decrease. The impact was particularly pronounced when the heat flux of the lower tube was high, and the heat flux of the upper tube was low. The observed change in heat transfer characteristics of the upper tube is attributed to convection effects and liquid agitation caused by bubbles moving from the bottom to the top. This provides insights into the intricate interplay between rotation angle, projected area, and heat transfer coefficient.

pool boiling, tube array, rotating angles, heat exchanger design.

Received: December 11, 2023; Accepted: January 17, 2024; Published: March 14, 2024

How to cite this article: Myeong-Gie Kang, Variations in pool boiling heat transfer of tube array due to rotating angle of horizontal lower tube, JP Journal of Heat and Mass Transfer 37(2) (2024), 127-141. http://dx.doi.org/10.17654/0973576324009

This Open Access Article is Licensed under Creative Commons Attribution 4.0 International License

References:
[1] A. Swain and M. K. Das, A review on saturated boiling of liquids on tube bundles, Heat Mass Transfer 50 (2014), 617-637.
[2] Y. Liu, X. Wang, X. Meng and D. Wang, A review on tube external heat transfer for passive residual heat removal heat exchanger in nuclear power plant, Applied Thermal Engineering 149 (2019), 1476-1491.
[3] Y. Liu, X. Wang, Q. Men and X. Meng, Experimental study of heat transfer outside C-shaped tube in water tank, Annals of Nuclear Energy 135 (2020), 1-8.
[4] B. U. Bae, B. J. Yun, S. Kim and K. H. Kang, Design of condensation heat exchanger for the PAFS (passive auxiliary feedwater system) of APR+ (advanced power reactor plus), Annals of Nuclear Energy 46 (2012), 134-143.
[5] M. M. Corletti, L. E. Hochreiter and D. Squarer, AP600 passive residual heat removal heat exchanger test, ANS Trans. 62 (1990), 669-671.
[6] L. Aprin, P. Mercier and L. Tadrist, Local heat transfer analysis for boiling of hydrocarbons in complex geometries: a new approach for heat transfer prediction in staggered tube bundle, Int. J. Heat Mass Transfer 54 (2011), 4203-4219.
[7] Z.-H. Liu and Y.-H. Qiu, Boiling heat transfer enhancement of water on tubes in compact in-line bundles, Heat Mass Transfer 42 (2006), 248-254.
[8] L. Daogang, Y. Zongyu, Z. Yuhang, W. Han, Z. Yuhao, C. Qiong and G. Shang, Experimental investigation on boiling heat transfer characteristics of the spent fuel bundle under flooded condition, Nuclear Engineering and Design 344 (2019), 168-173.
[9] C. Tian, Y. Liu, H. Meng, Z. Zhu, J. Wang and C. Yan, Experimental research on subcooled boiling heat transfer for natural circulation flow in a vertical rod bundle, Annals of Nuclear Energy 135 (2020), 106989.
[10] S. Chen, D. Liu, Y. Xiao and H. Gu, Experimental study on onset of nucleate boiling and flow boiling heat transfer in a rod bundle at low flow rate, Int. J. Heat Mass Transfer 137 (2019), 727-739.
[11] G. Ribatski, J. Jabardo and E. Silva, Modeling and experimental study of nucleate boiling on a vertical array of horizontal plain tubes, Applied Thermal and Fluid Science 32 (2008), 1530-1537.
[12] A. Gupta, J. S. Saini and H. K. Varma, Boiling heat transfer in small horizontal tube bundles at low cross-flow velocities, Int. J. Heat Mass Transfer 38 (1995), 599-605.
[13] E. Hahne, Chen Qui-Rong and R. Windisch, Pool boiling heat transfer on finned tubes - an experimental and theoretical study, Int. J. Heat Mass Transfer 34 (1991), 2071-2079.
[14] P. J. Nelson and B. M. Burnside, Boiling the immiscible water/n-nonane system from a tube bundle, Int. J. Heat Mass Transfer 28 (1985), 1257-1267.
[15] S.-S. Hsieh, G.-Z. Huang and H.-H. Tsai, Nucleate pool boiling characteristics from coated tube bundles in saturated R-134a, Int. J. Heat Mass Transfer 46 (2003), 1223-1239.
[16] Z.-H. Liu and Y.-H. Qiu, Enhanced boiling heat transfer in restricted spaces of a compact tube bundle with enhanced tubes, Applied Thermal Engineering 22 (2002), 1931-1941.
[17] B. D. Bock, M. Bucci, C. N. Markides, J. R. Thome and J. P. Meyer, Pool boiling of refrigerants over nanostructured and roughened tubes, Int. J. Heat Mass Transfer 162 (2020), 120387.
[18] Y. Wang, Z. Ma and J. Zhang, Precise determination of R134a boiling bundle effect on a column of reentrant cavity tubes, Applied Thermal Engineering 199 (2021), 117612.
[19] M. Muneeshwaran, C.-M. Yang, E. Cakmak and K. Nawaz, Augmentation of pool boiling heat transfer on tube bundles using metal foam, Applied Thermal Engineering 236 (2024), 121812.
[20] A. Ustinov, V. Ustinov and J. Mitrovic, Pool boiling heat transfer of tandem tubes provided with the novel microstructure, Int. J. Heat Fluid Flow 32 (2011), 777-784.
[21] M. G. Kang, Effects of elevation angle on pool boiling heat transfer of tandem tubes, Int. J. Heat Mass Transfer 85 (2015), 918-923.
[22] M. G. Kang, Effect of azimuth angle on pool boiling heat transfer of V-type tube array, JP Journal of Heat and Mass Transfer 27 (2022), 13-25.
[23] M. G. Kang, Variation of pool boiling heat transfer due to rotation angle of V-shape tube array, Int. J. Heat Mass Transfer 125 (2018), 788-791.
[24] M. G. Kang, Influence of lower concentrated heat source on pool boiling of horizontal tube, JP Journal of Heat and Mass Transfer 23 (2021), 81-93.
[25] H. W. Coleman and W. G. Steele, Experimentation and Uncertainty Analysis for Engineers, 2nd ed., John Wiley & Sons, 1999.