Analysis of influence of surging on heat transfer characteristics of liquified natural gas flow boiling in channel of plate-fin heat exchanger

被引：0
|
作者：
Wang H. [1 ]
Li J. [1 ]
Hu H. [1 ]
Ding G. [1 ]
Wu C. [2 ]
Chen H. [3 ]
Xing Z. [2 ]
机构：
[1] Institute of Refrigeration and Cryogenics, Shanghai Jiao Tong University, Shanghai
[2] Shanxi Fenxi Electromechanical Co., Ltd., Taiyuan, 030027, Shanxi
[3] Shanxi Fenxi Heavy Industry Co. Ltd., Taiyuan, 030027, Shanxi
来源：
Huagong Xuebao/CIESC Journal | 2018年 / 69卷
关键词：
Flow boiling; Heat transfer; Natural gas; Numerical simulation; Offshore conditions; Surging;
D O I：
10.11949/j.issn.0438-1157.20181116
中图分类号：
学科分类号：
摘要：
Under surging conditions in the sea, the phase change and flow characteristics of two-phase fluids in plate-fin heat exchanger channels will change, which will affect the heat exchanger performance. In order to clarify the surging impact mechanism, a model for heat transfer characteristics of liquefied natural gas flow boiling in channel of plate-fin heat exchanger under surging conditions was established. Firstly, the mechanism of heat transfer and mass transfer of two-phase flow in the channels was analyzed, and the numerical model to simulate the flow and heat transfer under steady conditions was established; secondly, a model for reflecting the surging acceleration was added in the numerical model, which realizes the simulation of heat transfer charactersitics under surging conditions; the proposed model was verified based on the experimental data under onshore conditions. Based on the proposed model, the effects of vapor quality, frequency and amplitude of surging on heat transfer characteristics were analyzed. The results show that, the heat transfer coefficient increases with the increasing surging amplitude, while it decreases with the increasing surging frequency; as vapor quality increases, the influence of surging on heat transfer gradually changes from deterioration to enhancement; as vapor quality is within 0.2-0.8, the surging impact factor for the heat transfer coefficient is within 87.9%-110.0%. The effect of surging on time-average heat transfer coefficient changes with different conditions, representing a maximum deterioration of 5.0% and a maximum enhanceent of 2.0%. © All Right Reserved.
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页码：101 / 108
页数：7
相关论文
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