Investigations of Heat Transfer in Vacuum between Room Temperature and 80 K

Cryogenic Engineering Conference 2017

材料科学;物理学

Hooks, J.^1 ; Demko, J.A.^1 ; Fesmire, J.E.^2 ; Matsumoto, T.^1

LeTourneau University, 2100 South Mobberly Avenue, Longview

TX

75607, United States^1

NASA Kennedy Space Center, Cryogenics Test Laboratory, UB-R1, KSC, FL

32899, United States^2

关键词: Boil-off calorimetries;    Critical temperatures;    High-temperature superconducting materials;    HTS materials;    Layered systems;    Material combination;    Multi-layer insulation;    Warm surface;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/278/1/012199/pdf
DOI  :  10.1088/1757-899X/278/1/012199

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

The heat transfer between room temperature and 80 K is controlled using various insulating material combinations. The modes of heat transfer are well established to be conduction and thermal radiation when in a vacuum. Multi-Layer Insulation (MLI) in a vacuum has long been the best approach. Typically this layered system is applied to the cold surface. This paper investigates the application of MLI to both the cold and warm surface to see whether there is a significant difference. In addition if MLI is on the warm surface, the cold side of the MLI may be below the critical temperature of some high temperature superconducting (HTS) materials. It has been proposed that HTS materials can serve to block thermal radiation. An experiment is conducted to measure this effect. Boil-off calorimetry is the method of measuring the heat transfer.