Developments in advanced and energy saving thermal isolations for cryogenic applications

Cryogenic Engineering Conference 2015

材料科学;物理学

Shu, Q.S.^1 ; Demko, J.A.^2 ; Fesmire, J.E.^3

1514 Southfork Drive, Keller

TX

76248, United States^1

LeTourneau University, 2100 S Mobberly Ave, Longview

TX

75602, United States^2

NASA Kennedy Space Center, Cryogenics Test Laboratory, KSC, FL

32899, United States^3

关键词: Cooling power;    Cryogenic applications;    Glass bubbles;    Heat switches;    Operating temperature;    Refrigeration loss;    Thermal isolation;    Vacuum condition;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/101/1/012014/pdf
DOI  :  10.1088/1757-899X/101/1/012014

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

The cooling power consumption in large scale superconducting systems is huge and cryogenic devices used in space applications often require an extremely long cryogen holding time. To economically maintain the device at its operating temperature and minimize the refrigeration losses, high performance of thermal isolation is essential. The radiation from warm surrounding surfaces and conducting heat leaks through supports and penetrations are the dominant heat loads to the cold mass under vacuum condition. The advanced developments in various cryogenic applications to successfully reduce the heat loads through radiation and conduction are briefly and systematically discussed and evaluated in this review paper. These include: (1) thermal Insulation for different applications (foams, perlites, glass bubbles, aerogel and MLI), (2) sophisticated low-heat-leak support (cryogenic tension straps, trolley bars and posts with dedicated thermal intercepts), and (3) novel cryogenic heat switches.