Effective of Density and Thickness of Ultra-fine Glass Wool Felt on Thermal Conductivity Under High Temperature
Ultra-fine glass wool felt has been used in cryogenic industry such as refrigerators and building field for many years while rarely used under high temperature according to the reported literatures.In this paper,effective thermal conductivity and heat transfer mechanism of ultra fine glass wool felt under high temperature were investigated.Thermal conductivity was measured by DRS-Ⅱ under the temperature ranged from 100℃ up to 500℃ with the variation of density from 0.09 g/cm3 to 0.126 g/cm3.The results indicated that the thermal conductivity of ultra-fine glass wool felt decreased with the increase of its density under the same high temperature,while when the density was the same,thermal conductivity did not increase with increasing temperature,it initially decreased and then increased because of the heat radiation.Three heat transfer mechanism of ultra-fine glass wool felt were theoretically investigated with special emphasis on the solid conduction due to high temperature.It was concluded in the present paper that using the heat transfer mechanism of the ultra-fine glass wool felt explained this phenomenon had also been drawn by experiment.
ultra-fine glass wool felt high temperature thermal conductivity heat transfer mechanism
Ye Xinli Chen Zhaofeng
Super Insulation Composite Laboratory, College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, P.R.China
国际会议
The 12th International Vacuum Insulation Symposium (IVIS 2015)(第十二届国际真空绝热材料会议)
南京
英文
37-39
2015-09-01（万方平台首次上网日期，不代表论文的发表时间）