在制冷剂管外降落膜流量的数值研究
1Shandong Institute of Petroleum and Chemical Technology, Dongying, 257061, Shandong, China. dlf_upc@163.com.
Scientific reports
|April 8, 2025
概括
为液化天然气 (LNG) FPSO单元优化螺旋式热交换器至关重要. 这项研究表明,液体薄膜厚度最均,雷诺兹数为1500,管外径为12毫米,有6个分配器.
科学领域:
- 机械工程 机械工程
- 化学工程是化学工程的重要组成部分.
- 流体动力学 流体动力学
背景情况:
- 浮动生产储存和卸载 (FPSO) 装置对于海上天然气开采至关重要.
- 液化天然气 (LNG) 工艺需要高效的热交换,特别是在螺旋式热交换器中.
- 了解外侧液体膜的行为对于优化这些设备中的热传输至关重要.
研究的目的:
- 分析LNG FPSO单元中使用的螺旋式热交换机的外侧液膜厚度.
- 为了研究雷诺兹数 (Re),管外径和分配器数量对液膜均性的影响.
- 为了确定最优的设计参数,以实现均的液体薄膜分布.
主要方法:
- 螺旋式热交换机外侧流体流量的计算分析.
- 参数研究变化雷诺兹数 (Re),管外径和分配器的数量.
- 检查液体薄膜厚度分布在轴向和周边方向.
主要成果:
- 液体薄膜厚度在轴向上呈现周期性变化,受分配器间距的影响.
- 周围液体薄膜厚度与角度α负相关,在120°最薄.
- 确定了液体薄膜厚度均的最佳条件:Re=1500,管外径=12毫米,和6个分配器.
结论:
- 这项研究为液化天然气应用的螺旋绕热交换器中的液膜行为提供了关键的见解.
- 确定最佳参数 (Re=1500,12mm OD,6个分配器) 可以提高这些关键组件的设计和效率.
- 这些发现有助于更安全,更有效地运行使用FPSO装置的天然气液化工艺.
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