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Development of an experimental setup for measuring vacuum decay in dual-wall fiber-reinforced composite pipes.

机译:开发用于测量双壁纤维增强复合管中真空衰减的实验装置。

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摘要

Thermal management and energy input are required to maintain working fluids, i.e., liquefied natural gas, liquid nitrogen, and multi-phase fluids within their optimal working conditions. Increasing a pipes' thermal resistance, e.g., utilizing vacuum insulation, is one method of minimizing energy input. A dual-wall concentric pipe employing a vacuum in the annulus, along with low emissivity surface coatings, is an achievable and economically viable solution. In this study, an experimental setup was designed and utilized to measure the air leakage mass flow rate for single-wall unloaded and mechanically loaded dual-wall fiber reinforced polymeric composite specimens. The mass flow rates were used to develop intrinsic permeability coefficients to quantify leakage, and to determine the maximum serviceable pipe length for a mechanical vacuum pump. In addition, thermal resistance equations were developed to quantify the theoretical heat loss, and an economic study was performed to ascertain the viability for three applications.
机译:需要进行热管理和能量输入,以将工作流体(即液化天然气,液氮和多相流体)保持在最佳工作条件下。例如,利用真空绝热来增加管道的热阻是使能量输入最小化的一种方法。在环带中使用真空以及低辐射率的表面涂层的双壁同心管是一种可实现且经济可行的解决方案。在这项研究中,设计了一个实验装置,并利用它来测量单壁未加载和机械加载的双壁纤维增强聚合物复合材料标本的漏气质量流速。质量流率用于得出固有渗透系数,以量化泄漏,并确定机械真空泵的最大可用管道长度。此外,开发了热阻方程式以量化理论上的热损失,并进行了经济研究以确定三种应用的可行性。

著录项

  • 作者

    Ruhl, Mark Jason.;

  • 作者单位

    University of Alberta (Canada).;

  • 授予单位 University of Alberta (Canada).;
  • 学科 Engineering Mechanical.
  • 学位 M.Sc.
  • 年度 2010
  • 页码 212 p.
  • 总页数 212
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 老年病学;
  • 关键词

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