流体机械

Characteristics Analysis of Condensation outside Horizontal Tube Bundles and Novel Condensation Enhancement Method

  • LI Nianqi ,
  • TIAN Ke ,
  • KE Hanbing ,
  • ZENG Min ,
  • WANG Qiuwang
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  • 1. Key Laboratory of Thermo-Fluid Science and Engineering, Ministry of Education, Xi’an Jiaotong University, Xi’an 710049, China
    2. Key Lab on Steam Power System, Wuhan Second Ship Design and Research Institute, Wuhan 430025, China

网络出版日期: 2023-12-01

基金资助


We would like to acknowledge the financial support for this work provided by Natural Science Foundation of China (No. 51876146), the Excellent Youth Foundation of Hubei Scientific Committee (No. 2019CFA082), and the Opening Funds of the Key Lab on Steam Power System (TPL2018B01).

版权

Science Press, Institute of Engineering Thermophysics, CAS and Springer-Verlag GmbH Germany, part of Springer Nature 2022

Characteristics Analysis of Condensation outside Horizontal Tube Bundles and Novel Condensation Enhancement Method

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  • 1. Key Laboratory of Thermo-Fluid Science and Engineering, Ministry of Education, Xi’an Jiaotong University, Xi’an 710049, China
    2. Key Lab on Steam Power System, Wuhan Second Ship Design and Research Institute, Wuhan 430025, China

Online published: 2023-12-01

Supported by


We would like to acknowledge the financial support for this work provided by Natural Science Foundation of China (No. 51876146), the Excellent Youth Foundation of Hubei Scientific Committee (No. 2019CFA082), and the Opening Funds of the Key Lab on Steam Power System (TPL2018B01).

Copyright

Science Press, Institute of Engineering Thermophysics, CAS and Springer-Verlag GmbH Germany, part of Springer Nature 2022

摘要

本文对纵向流管壳式冷凝器的热工水力特性进行了数值研究。考虑进口流速、过热温度和不凝性气体三个因素,研究了壳侧纵向流在水平管束上的凝结特性。并对压降和传热系数细分为几个部分开展研究。进行了两相界面行为分析,研究了不凝结气体层、蒸汽质量和不凝结气体类型对凝结过程的影响。基于上述定量分析,研究了水平管束上的凝结物的热阻规律。发现管外的热阻在冷凝过程中占主导地位。最后,引入六边形夹持挡板(HCB)作为强化凝结的方法,以破坏冷凝物边界层,并提供扰动以强化凝结。结果显示,HCB使总传热系数提高了8.1%-40.7%,同时降低了临界过热温度和显热与潜热的阈值比。

本文引用格式

LI Nianqi , TIAN Ke , KE Hanbing , ZENG Min , WANG Qiuwang . Characteristics Analysis of Condensation outside Horizontal Tube Bundles and Novel Condensation Enhancement Method[J]. 热科学学报, 2022 , 31(3) : 934 -945 . DOI: 10.1007/s11630-022-1534-8

Abstract

Condensation is a phase-change heat-transfer phenomenon crucial in many industries involving latent heat release and mass transfer. Shell-and-tube condensers are essential contributors to the condensation process, and their tube bundles serve as a substrate. Here, the thermal-hydraulic characteristics of condensation in a longitudinal-flow shell-and-tube condenser were investigated numerically. The shell-side longitudinal-flow condensation on the horizontal tube bundles was studied considering inlet flow rate, overheating temperature, and non-condensable gases. Related pressure drops and heat transfer coefficients were subdivided into several components to provide further insights. Two-phase interface behavior analyses were conducted to demonstrate the outcomes with respect to the non-condensable gas layer, vapor quality, and non-condensable gas type. Based on the thorough quantitative analyses outlined above, the thermal resistance of the condensation on the horizontal tube bundle was investigated. The thermal resistance outside the tube was found to dominate the condensation process. Finally, hexagon clamping baffles (HCBs) were introduced as a novel solution to impair condensate boundary layers and provide perturbations to intensify condensation heat transfer. The results revealed that the HCBs enhanced the total heat transfer coefficients by 8.1%–40.7% while reducing the critical overheating temperature and the threshold ratio between sensible and latent heat.

参考文献

[1] Khan A.H., Islam M.S., A new algorithm for a condenser design for large-scale nuclear power plants in tropical region. Journal of Thermal Science, 2020, 29(5): 1370– 1389.
[2] Nusselt W., Die Oberflächenkondensation des Wasserdampfes, VDI, 1916.
[3] Cavallini A., Del Col D., Doretti L., Longo G.A., Rossetto L., Heat transfer and pressure drop during condensation of refrigerants inside horizontal enhanced tubes. International Journal of Refrigeration, 2000, 23(1): 4–25.
[4] Matkovic M., Cavallini A., Del Col D., Rossetto L., Experimental study on condensation heat transfer inside a single circular minichannel. International Journal of Heat and Mass Transfer, 2009, 52(9–10): 2311–2323.
[5] Del Col D., Bortolin S., Cavallini A., Matkovic M., Effect of cross sectional shape during condensation in a single square minichannel. International Journal of Heat and Mass Transfer, 2011, 54(17–18): 3909–3920.
[6] Othmer D.F., The condensation of steam. Industrial and Engineering Chemistry, 1929, 21(6): 576–583.
[7] Wu H., Li Y., Chen J., Analysis of an evaporator-condenser-separated mechanical vapor compression system. Journal of Thermal Science, 2013, 22(2): 152–158.
[8] Lu J., Cao H., Li J., Condensation heat and mass transfer of steam with non-condensable gases outside a horizontal tube under free convection. International Journal of Heat and Mass Transfer, 2019, 139: 564–576.
[9] Yang L., Zhang L., Li A., Wu J., Modeling thermal and geometrical effects on non-condensable gas desorption in horizontal-tube bundles of falling film evaporation. Desalination, 2020, 478: 114302.
[10] Tang G., Hu H., Zhuang Z., Tao W., Film condensation heat transfer on a horizontal tube in presence of a noncondensable gas. Applied Thermal Engineering, 2012, 36: 414–425.
[11] Shamsabadi H., Rashidi S., Esfahani J.A., Keshmiri A., Condensation in the presence of non-condensable gases in a convergent 3D channel. International Journal of Heat and Mass Transfer, 2020, 152: 119511.
[12] Bae B.U., Kim S., Park Y.S., Kang K.H., Experimental investigation on condensation heat transfer for bundle tube heat exchanger of the PCCS (Passive Containment Cooling System). Annals of Nuclear Energy, 2020, 139: 107285.
[13] Bonneau C., Josset C., Melot V., Auvity B., Comprehensive review of pure vapour condensation outside of horizontal smooth tubes. Nuclear Engineering and Design, 2019, 349: 92–108.
[14] Gu X., Zheng Z., Xiong X., Wang T., Luo Y., Wang K., Characteristics of fluid flow and heat transfer in the shell side of the trapezoidal-like tilted baffles heat exchanger. Journal of Thermal Science, 2018, 27(6): 602–610.
[15] Hsiao K.L., Conjugate heat transfer for free convection along a vertical plate fin. Journal of Thermal Science, 2010, 19(4): 337–345.
[16] Ma T., Zhang P., Shi H., Chen Y., Wang Q., Prediction of flow maldistribution in printed circuit heat exchanger. International Journal of Heat and Mass Transfer, 2020, 152: 119560.
[17] Gupta A., Kumar R., Gupta A., Condensation of R-134a inside a helically coiled tube-in-shell heat exchanger. Experimental Thermal and Fluid Science, 2014, 54: 279–289.
[18] Yang G., Ding G., Chen J., Yang W., Hu S., Experimental study on shell side heat transfer characteristics of two-phase propane flow condensation for vertical helically baffled shell-and-tube exchanger. International Journal of Refrigeration, 2019, 107: 135–144.
[19] Sun C., Li Y., Han H., Zhu J., Wang S., Liu L., Experimental and numerical simulation study on the offshore adaptability of spiral wound heat exchanger in LNG-FPSO DMR natural gas liquefaction process. Energy, 2019, 189: 116178.
[20] Risberg M., Gebart R., Numerical modeling of counter-current condensation in a Black Liquor Gasification plant. Applied Thermal Engineering, 2013, 58(1–2): 327–335.
[21] Jian G., Wang S., Sun L., Wen J., Numerical investigation on the application of elliptical tubes in a spiral-wound heat exchanger used in LNG plant. International Journal of Heat and Mass Transfer, 2019, 130: 333–341.
[22] Wang Q., Xie G., Zeng M., Luo L., Prediction of heat transfer rates for shell-and-tube heat exchangers by artificial neural networks approach. Journal of Thermal Science, 2006, 15(3): 257–262.
[23] Yu C., Ren Z., Zeng M., Numerical investigation of shell-side performance for shell and tube heat exchangers with two different clamping type anti-vibration baffles. Applied Thermal Engineering, 2018, 133: 125–136.
[24] Hirt C., Nichols B., Volume of fluid (VOF) method for the dynamics of free boundaries. Journal of Computational Physics, 1981, 39(1): 201–225.
[25] Lee W.H., Computational methods for two-phase flow and particle transport, World Scientific, Taipei, 2013.
[26] Menter F.R., Two-equation eddy-viscosity turbulence models for engineering applications. AIAA Journal, 1994, 32(8): 1598–1605.
[27] Menter F.R., Kuntz M., Langtry R., Ten years of industrial experience with the SST turbulence model. Proceedings of the Fourth International Symposium on Turbulence, Heat and Mass Transfer, Antalya, Turkey, October 12–17, 2003. 
[28] ANSYS Inc., ANSYS FLUENT User Guide 18, 2017.
[29] Yin Z., Investigation on heat transfer performance of vapor condensation with noncondensable gas in channels. Xi’an Jiaotong University, Xi’an, China, 2016. (in Chinese)
[30] Taitel Y., Dukler A.E., A model for predicting flow regime transitions in horizontal and near horizontal gas-liquid flow. AIChE Journal, 1976, 22(1): 47–55.
[31] Yu C., Cheng T., Chen J., Ren Z., Zeng M., Investigation on thermal-hydraulic performance of parallel-flow shell and tube heat exchanger with a new type of anti-vibration baffle and wire coil using RSM method. International Journal of Thermal Sciences, 2019, 138: 351–366.
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