摘要
海洋气田平台的三甘醇脱水装置中重沸器内温度场的合理分布对于提高分离效率、减小三甘醇损失等具有重要的经济价值。本文使用VOF方法,通过数值模拟重沸器内的流动与相变过程,获得了8000~20000 W/m2范围内5种不同热流密度负载时,重沸器中的流场和温度场分布,确定了重沸器内流动的主要形式是径向热对流。进一步的针对重沸器内加热管表面温度的分布特征,构建了其受热流密度影响的单变量指数型概率分布模型P=ekΔT+b,其中k与流体性质有关的半经验参数,本文中取-0.46,b=0.1q+3.37;相比之前的一些工作,本文构建的温度预测模型是连续的,能够更加准确的描述加热器表面温度,为高性能重沸器的设计提供工程指导。
The reasonable distribution of the temperature field in the reboiler in the TEG dehydration unit of the offshore gas field platform has important value and significance for improving the TEG separation efficiency and reducing the over-temperature loss.In this research,based on the VOF method,the flow field and temperature field distribution in the reboiler are obtained through numerical simulations at 5 heat flux between 8000 and 20000 W/m2,determined that the main form of flow in the reboiler is radial heat convection.Furthermore,the distribution characteristics of the surface temperature of the heating tube in the reboiler,a univariate exponential probability distribution model affected by the heat flux was constructed as P=ekΔT+b,which k is a semi-empirical parameter related to fluid properties,in this paper,it’s-0.46,and b=0.1q+3.37,Comparing with previous work,the temperature prediction model constructed here is continuous,which can describe the heater surface temperature more accurately and provide engineering guidance for the design of high-performance reboiler.
作者
李巍
沈志恒
董超
吴尧
翟占虎
LI Wei;SHEN Zhi-Heng;Dong Chao;WU Yao;ZHAI Zhan-Hu(Offshore Oil Engineering Co.,Ltd Special Equipment Company, Tianjin 300452, China;School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, China)
出处
《节能技术》
CAS
2021年第3期251-255,260,共6页
Energy Conservation Technology
关键词
重沸器
三甘醇
温度分布
VOF
沸腾换热
reboiler
triethylene glycol
temperature distribution
boiling heat transfer
