Abstract
Supercritical CO2 has excellent flow and heat transfer characteristics, but studies are lacking on the heat transfer characteristics of static mixers using it as a working medium. To obtain the heat transfer enhancement mechanism of supercritical CO2 within static mixers with three helical blades (TKSM), the flow and heat transfer characteristics of supercritical CO2 in horizontal and vertically upward of TKSM were determined by three-dimensional steady-state numerical simulation at Re=7,900−22,385, respectively. With other parameters fixed, lower heat flux, inlet temperature, operating pressure, or higher mass flow corresponds to higher heat transfer coefficients (h). The orthogonal test revealed that mass flow has the greatest effect on heat transfer. Besides, the results showed that the comprehensive performance evaluation criteria (PEC) of TKSM were 1.18–1.64 times and 1.25–1.47 times of Kenics static mixer (KSM) in two different states. Considering the local deterioration of the horizontal flow, the vertically upward flow was recommended with uniform temperature distributions. Compared with the horizontal flow, the heat transfer capacity of TKSM in the upward flow increases by 92.64%–119.63%, whereas the buoyancy effect decreases by 99.83%–99.97%.
Article PDF
Similar content being viewed by others
Avoid common mistakes on your manuscript.
Abbreviations
- Ar :
-
aspect ratio of mixing element
- AKN:
-
Abe-Kondoh-Nagano
- cp :
-
specific heat capacity [kJ/(kg·K)]
- D:
-
diameter of the tube [mm]
- G:
-
mass flow [kg/s]
- h:
-
heat transfer coefficient [W/(m2·K)]
- H:
-
enthalpy [kJ/kg]
- I:
-
turbulence intensity
- L:
-
length of the tub [mm]
- l:
-
length of a single mixing element [mm]
- L-B:
-
Lam-Bremhorst
- Nu:
-
Nusselt number
- Δp:
-
pressure drop [Pa]
- p:
-
pressure [MPa]
- Pr:
-
Prandtl number
- q:
-
heat flux [kW/m2]
- Re:
-
Reynolds number
- r:
-
radial distance [mm]
- R:
-
radius [mm]
- R′:
-
the extreme difference in the orthogonal test
- RNG:
-
Reynolds normalization group
- SST:
-
shear stress transport
- T:
-
temperature [K]
- v:
-
the axial velocity [m/s]
- W:
-
width of the element [mm]
- z:
-
distance from the starting point of the heating section to the cross-section [m]
- b:
-
mainstream fluid
- e:
-
element
- in:
-
inlet
- out:
-
outlet
- w:
-
wall
- λ :
-
thermal conductivity of fluid [W/(m·K)]
- μ :
-
dynamic viscosity of fluid [Pa·s]
- ρ :
-
the density of the fluid [kg/m3]
- δ :
-
the thickness of the element [mm]
References
A. Zendehboudi, Z. L. Ye, A. Hafner, T. Andresenc and G. Skaugen, Int. J. Heat Mass Transfer, 178, 121641 (2021).
M. M. Ehsan, Z. Guan and A. Y. Klimenko, Renew. Sust. Energ. Rev., 92, 658 (2018).
Y. T. Ge, S. A. Tassou, I. Dewa Santosa and K. Tsamos, Appl. Energ., 160, 973 (2015).
S. M. Liao and T. S. Zhao, Int. J. Heat Mass Transfer, 45, 5025 (2002).
C. B. Dang and E. Hihara, Int. J. Refrig., 27, 736 (2004).
X. X. Liu, X. X. Xu, C. Liu, S. J. Zhang, J. C. He and C. B. Dang, Appl. Therm. Eng., 181, 115987 (2020).
X. J. Zhu, R. Z. Zhang, X. Yu, M. G. Cao and Y. X. Ren, Energies, 13, 3502 (2020).
G. W. Zhang, P. Hu, L. X. Chen and M. H. Liu, Appl. Therm. Eng., 143, 1101 (2018).
C. S. Yan, J. L. Xu, B. G. Zhu and G. L. Liu, Materials, 13, 723 (2020).
W. J. Bai, X. X. Xu and Y. Y. Wu, CIESC J., 67, 1244 (2016).
M. R. Xiang, J. F. Guo, X. L. Huai, K. Y. Cheng, X. Y. Cui, Z. Zhang and J. Zhang, J. Eng. Thermophy-rus., 38, 1929 (2017).
Z. H. Zhao, Shandong Univ. (2019).
C. S. Yan and J. L. Xu, Acta Phys. Sin., 69, 136 (2020).
J. Y. Wang, Z. Q. Guan, H. Gurgenci, A. Veeraragavan, X. Kang and K. Hooman, Int. J. Therm. Sci., 138, 190 (2019).
X. R. Zhuang, X. H. Xu, Z. Yang, Y. X. Zhao and P. Yu, Acta Phys. Sin., 70, 176 (2021).
S. X. Wang, W. Zhang, Z. Y. Niu and J. L. Xu, CIECS J., 64, 3917 (2013).
K. Z. Wang, X. X. Xu, Y. Y. Wu, C. Liu and C. B. Dang, J. Supercrit. Fluids, 99, 112 (2015).
K. Z. Wang, X. X. Xu, C. Liu, W. J. Bai and C. B. Dang, Int. J. Heat Mass Transfer, 108, 1645 (2017).
M. Yang, Appl. Therm. Eng., 109, 685 (2016).
X. X. Liu, H. Shan, S. J. Zhang, X. X. Xu and C. Liu, J. Eng. Thermophys-rus., 41, 55 (2020).
X. X. Liu, J. Ye, X. X. Xu, C. Liu, K. Z. Wang, H. R. Li and W. J. Bai, CIESC J., 67, 120 (2016).
H. J. Zhao, X. W. Li and X. X. Wu, J. Supercrit. Fluids, 127, 48 (2017).
J. Cheng, North China Electric Power Univ. (2020).
V. B. Ankudinov and V. A. Kurganov, High Temp., 19, 870 (1981).
B. S. Shiralkar and G. Peter, J. Heat Transfer, 91, 27 (1969).
Z. Wang, R. Xu, C. Xiong and P. Jiang, J. Tsinghua Univ. (Sci. & Technol.), 58, 1101 (2018).
Y. Y. Bae, H. Y. Kim and T. H. Yoo, Int. J. Heat Fluid Flow, 32, 340 (2011).
M. Regner, K. Östergren and C. TräGåRdh, Chem. Eng. Sci., 61, 6133 (2006).
S. Casey Jones, F. Sotiropoulos and A. Amirtharajah, J. Environ. Eng., 128, 5 (2015).
A. Ghanem, T. Lemenand, D. D. Valle and H. Peerhossaini, Chem. Eng. Res. Des., 92, 205 (2014).
R. K. Thakur, Ch. Vial, K. D. P. Nigam, E. B. Nauman and G. Djelveh, Chem. Eng. Res. Des., 81, 787 (2003).
W. G. Li, Z. B. Yu, Y. Wang and Y. L. Li, Therm. Sci. Eng. Progress, 31, 101285 (2022).
P. C. Simões, B. Afonso, J. Fernandes and J. P. B. Mota, J. Supercrit. Fluids, 43, 477 (2008).
P. F. Lisboa, J. Fernandes, P. C. Simões, J. P. B. Mota and E. Saatdjian, J. Supercrit. Fluids, 55, 107 (2010).
H. B. Meng, F. Wang, Y. F. Yu, M. Y. Song and J. H. Wu, Ind. Eng. Chem. Res., 53, 4084 (2014).
H. B. Meng, M. Y. Song, Y. F. Yu, F. Wang and J. H. Wu, Can. J. Chem. Eng., 93, 1849 (2015).
H. B. Meng, G. X. Zhu, Y. F. Yu, Z. Y. Wang and J. H. Wu, Int. J. Heat Mass Transfer, 99, 647 (2016).
H. B. Meng, M. Q. Han, Y. F. Yu, Z. Y. Wang and J. H. Wu, Int. J. Heat Mass Transfer, 156, 119788 (2020).
H. B. Meng, J. B. Wang, Y. F. Yu, Z. Y. Wang and J. H. Wu, Chin. J. Process Eng., 22, 338 (2022).
H. B. Meng, Y. N. Hao, Y. F. Yu, Z. G. Li, S. N. Song and J. H. Wu, Korean J. Chem. Eng., 37, 1859 (2020).
J. H. Wu, Chinese Patent, 200,510,045,606.8 (2007).
F. R. Menter, AIAA J., 32, 1598 (1994).
H. B. Meng, T. Meng, Y. F. Yu, Z. Y. Wang and J. H. Wu, Int. J. Heat Mass Transfer, 194, 123006 (2022).
D. M. McEltigot and J. D. Jackson, Nucl. Eng. Des., 232, 327 (2004).
L. Wang, Y. C. Pan, J. D. Lee, Y. Wang, B. R. Fu and C. Pan, Int. J. Heat Mass Transfer, 159, 120136 (2020).
Z. M. Lin, D. L. Sun and L. B. Wang, Heat Mass Transfer, 45, 1351 (2009).
K. W. Song and L. B. Wang, Prog. Comput. Fluid Dyn., 8, 496 (2008).
B. G. Zhu, X. M. Wu, L. Zhang, E. H. Sun, H. S. Zhang and J. L. Xu, CIECS J., 70, 1282 (2019).
B. Gong, J. Zhang, C. M. Zhang and J. H. Wu, J. Beijing University Chem. Technol., 35, 84 (2008).
Acknowledgements
The authors acknowledge funding support for this research from the Key Scientific Research Project of Education Department of Liaoning Province (LJKZ0429), Shenyang Young and Middle-aged Science and Technology Innovation Talent Support Program (RC200032), National Natural Science Foundation of China (21476142), Distinguished Professor of Liaoning Province (LCH [2018] No. 35), the Science and Technology Research Project of Liaoning BaiQianWan Talents Program (201892151), and Natural Science Foundation of Liaoning Province (2022-MS-290, 2019-ZD-0082).
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Meng, H., Yao, Y., Yu, Y. et al. Enhancement analysis of turbulent flow and heat transfer of supercritical CO2 in a static mixer with three helical blades. Korean J. Chem. Eng. 40, 79–90 (2023). https://doi.org/10.1007/s11814-022-1312-z
Received:
Revised:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s11814-022-1312-z