Steady-State Heat Transfer in He II through Porous Superconducting Cable Insulation
Steady-State Heat Transfer in He II through Porous Superconducting Cable Insulation
复制标题
He II 中通过多孔超导电缆绝缘的稳态传热
DOI：
10.1007/978-1-4613-0373-2_37
复制
发表时间：
1996
期刊：
影响因子：
--
通讯作者：
M. François
中科院分区：
文献类型：
--
作者：
B. Baudouy;F. Juster;C. Meuris;L. Vieillard;M. François
大型强子对撞机计划包括研究超流氦（He II）冷却的偶极磁体中缠绕的超导电缆的热行为。这些超导电缆的绝缘形成了阻碍He II冷却的主要热屏蔽。这在经受热负荷的磁体中尤其是一个问题。为了研究He II传热过程，已经实现了在这种介质中产生一维传热的实验模型。绝缘通常通过围绕超导电缆缠绕不同种类的Kapton®带、环氧树脂浸渍的玻璃纤维带或Kevlar®纤维带的组合来实现。He II通过这些多层多孔板的稳态传热进行了分析。一系列的热通量的实验结果表明，存在不同的热制度有关的He II。它示出的参数的重要性是一个全球性的几何因素，可以被认为是一个等效的“渗透率”有关的He II传热，传递函数f（T）的He II和导热系数的板坯。我们提出并分析了不同的绝缘作为温度的函数的结果。
The LHC program includes the study of thermal behavior of the superconducting cables wound in the dipole magnet cooled by superfluid helium (He II). Insulation of these superconducting cables forms the major thermal shield hindering the He II cooling. This is particularly a problem in magnets which are subjected to thermal loads. To investigate He II heat transfer processes an experimental model has been realized which creates a one-dimensional heat transfer in such media. Insulation is generally realized by wrapping around the superconducting cable a combination of different kind of Kapton® tapes, fiber-glass impregnated by epoxy resin or Kevlar® fiber tapes. Steady-state heat transfer in He II through these multi-layer porous slabs has been analyzed. Experimental results for a range of heat flux show the existence of different thermal regimes related to He II. It is shown that the parameters of importance are a global geometrical factor which could be considered as an equivalent “permeability” related to He II heat transfer, the transfer function f(T) of He II and the thermal conductivity of the slab. We present and analyze results for different insulations as a function of the temperature.