Simulation of falling film flow and heat transfer at shell-side of coil-wound heat exchanger

被引：0

作者：

Li, Jianrui ^{[1
]}

Chen, Jie ^{[2
]}

Pu, Hui ^{[2
]}

Li, Endao ^{[2
]}

Ding, Guoliang ^{[1
]}

Zhuang, Dawei ^{[1
]}

Hu, Haitao ^{[1
]}

机构：

[1] Institute of Refrigeration and Cryogenics, Shanghai Jiao Tong University, Shanghai

[2] R&D Center, CNOOC Gas & Power Group, Beijing

来源：

Huagong Xuebao/CIESC Journal | 2015年 / 66卷

关键词：

Coil-wound heat exchanger; Falling film; Numerical model; Phase change; Two-phase flow;

D O I：

10.11949/j.issn.0438-1157.20150841

中图分类号：

学科分类号：

摘要：

The objective of this paper is to develop a numerical model to predict the two-phase flow, heat transfer and mass transfer at shell-side of coil-wound heat exchangers(CWHEs), which can predict the performance of heat exchangers and optimize the structure of CWHE. To achieve this goal, the mechanism of the status of shell-side two-phase flow should be analyzed. Then, a model for simulating flow pattern, including the droplet flow, the column flow and the sheet flow, is developed by employing the volume of fluid-continuous surface force method; the mass transfer model is developed and mass transfer rate can be predicted on tube surface and liquid-gas interface; then the latent heat during evaporation and condensation can be calculated based on the mass transfer rates; the forces and the heat and mass transfer rates are introduced into the control equations as the source terms. The proposed model is validated by the experimental data from the existing references. There is good agreement between experimental data and predictions. The validation results show that 89% of the predicted data can agree with the experimental data within a deviation of ±25%. The heat and mass transfer coefficients obtained by the model are also analyzed. © All Right Reserved.

引用

页码：40 / 49

页数：9

共 33 条

[11] Neeraas B.O., Fredheim A.O., Aunan B., Experimental data and model for heat transfer, in liquid falling film flow on shell-side, for spiral-wound LNG heat exchanger, International Journal of Heat and Mass Transfer, 47, 14, pp. 3565-3572, (2004)
[12] Lu X., Du X., Zeng M., Zhang S., Wang Q., Shell-side thermal-hydraulic performances of multi-layer spiral-wound heat exchangers under different wall thermal boundary conditions, Applied Thermal Engineering, 70, 2, pp. 1216-1227, (2014)
[13] Killion J.D., Garimella S., Simulation of pendant droplets and falling films in horizontal tube absorbers, Journal of Heat Transfer, 126, 6, pp. 1003-1013, (2004)
[14] Lei X., Li H., Yan L., Et al., Numerical investigation on the offset characteristics of falling liquid columns over horizontal tubes under the interaction of inter-tube gas flows, Journal of Engineering Thermophysics, 31, 11, pp. 1875-1878, (2010)
[15] Wang X., He M., Zhang Y., Numerical simulation of the liquid flowing outside the tube of the horizontal-tube falling film evaporator, Journal of Engineering Thermophysics, 29, 8, pp. 1347-1350, (2008)
[16] Qiu Q., Chen J., Numerical simulation of film formation on horizontal-tube falling film evaporators, Journal of Chinese Society of Power Engineering, 31, 5, pp. 357-361, (2011)
[17] Luo L., Zhang G., Pan J., Et al., Flow and heat transfer characteristics of falling water film on horizontal circular and non-circular cylinders, Journal of Hydrodynamics, 25, 3, pp. 404-414, (2013)
[18] Luo L., Zhang G., Tian M., Et al., Numerical simulation of liquid film flow on horizontal circular and shaped cylinders for falling film evaporation, Journal of Chinese Society of Power Engineering, 34, 4, pp. 710-714, (2013)
[19] Luo L., Zhang G., Pan J., Et al., Influence of oval-shaped tube on falling film flow characteristics on horizontal tube bundle, Desalination and Water Treatment, 54, 11, (2015)
[20] Pise A.T., Korde N.U., Salunkhe R.H., Numerical simulation of falling droplets/jets over horizontal tubes, International Journal of Fluid Mechanics Research, 40, 3, (2013)

← 1 2 3 4 →