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在sloshing条件下,螺旋曲线热交换器的热传递性能的数值模拟

Longfei Dong¹, Congcong Dong², Xiao Wu¹

¹Shandong Institute of Petroleum and Chemical Technology, Dongying, Shandong, China.

|December 11, 2023

概括

这项研究以数值模拟了液化天然气FPSO单元的螺旋热交换器中的热传递. 最佳的设计涉及调整绕角度,管间距和外径以提高效率,同时管理结效应.

科学领域:

热力学和热传递热力学和热传递
离岸工程在海上工程.
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田至关重要,需要高效的热交换.
螺旋式热交换器在这些单元中用于包括液化和储存在内的功能.
了解传热特性对于优化FPSO设备选择和设计至关重要.

研究的目的:

在各种条件下研究螺旋式热交换器的传热特性.
在LNG FPSO应用中为这些换热器的设备选择和结构优化提供基础.
分析结构参数和泥对传热性能的影响.

主要方法:

进行了数值模拟来分析传热系数.
这项研究研究了绕角度,管间距和外径对外侧传热的影响.
此外,还评估了冲压角度和冲压周期对传热的影响.

主要成果:

热传递系数随着绕角度和管间距的增加而下降,但随着外径的增加而增加.
软化促进了低于3°的热传递,但在7°以上显著降低了性能.
增长的冲泡时间通常会增强热传递,超过15秒的时间影响最小.

结论:

优化结构参数,如绕角度,管间距和外径,是提高换热器效率的关键.
沉动力学显著影响热传递;适度的角度可能是有益的,而大的角度是有害的.
这些发现为设计和选择LNG FPSO单元的螺旋式热交换器提供了关键数据.

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