MEASURING AND STUDY FOR EFFECTIVE THERMAL CONDUCTIVITY OF SPACER MATERIAL OF MULTI-LAYER THERMAL INSULATION AT LOW TEMPERATURE

The measuring method of effective thermal conductivity at low temperature of spacer material for multi-layer thermal insulation,such as fiberglass cloth and thermal insulation paper,have been given.The method can be used for folium materials.The measuring results and the affect factors of the effective thermal conductivity at low temperature,such as layer density,and density etc.have been analyzed.