Uncertainties Quantification of Effective Thermal Conductivity for Ceramic Fiber Blanket

2014 ◽  
Vol 35 (1) ◽  
pp. 90-104 ◽  
Author(s):  
Shu-yuan Zhao ◽  
Jian-jun Li ◽  
Xiao-dong He
Keyword(s):  
Thermal Conductivity ◽  
Effective Thermal Conductivity ◽  
Ceramic Fiber

A Simplified Model for Effective Thermal Conductivity of Highly Porous Ceramic Fiber Insulation

2015 ◽  
Vol 7 (4) ◽  
Author(s):  
Nicholas P. G. Lumley ◽  
Emory Ford ◽  
Eric Minford ◽  
Jason M. Porter
Keyword(s):  
Experimental Data ◽  
Thermal Conductivity ◽  
Natural Convection ◽  
Effective Thermal Conductivity ◽  
Research Effort ◽  
Porous Ceramic ◽  
Ceramic Fiber ◽  
Chemical Process Industry ◽  
Thermophysical Model ◽  
Highly Porous

Highly porous ceramic fiber insulations are beginning to be considered as a replacement for firebrick insulations in high temperature, high pressure applications by the chemical process industry. However, the implementation of such materials has been impeded by a lack of experimental data and predictive models, especially at high gas pressure. The goal of this work was to develop a general, applied thermophysical model to predict effective thermal conductivity, keff, of porous ceramic fiber insulation materials and to determine the temperature, pressure, and gas conditions under which natural convection is a possible mode of heat transfer. A model was developed which calculates keff as the sum of conduction, convection, and radiation partial conductivities. The model was validated using available experimental data, including laboratory measurements made by this research effort. Overall, it was concluded that natural convection is indeed possible for the most porous insulations at pressures exceeding 10 atm. Furthermore, keff for some example insulations was determined as a function of temperature, pressure, and gas environment.

Performance Test and Research of Ceramic Fiberboard

2014 ◽  
Vol 488-489 ◽  
pp. 36-39
Author(s):  
Ru Ji ◽  
Xi Dong Wang ◽  
Zuo Tai Zhang ◽  
Li Li Liu
Keyword(s):  
Thermal Conductivity ◽  
Moisture Content ◽  
Bulk Density ◽  
Effective Thermal Conductivity ◽  
Performance Test ◽  
Influence Factors ◽  
Thermal Capacity ◽  
Ceramic Fiber ◽  
Insulation Materials ◽  
Coefficient Of Thermal Conductivity

Ceramic fiber has great refractory and insulating ability. The coefficient of thermal conductivity is a significant characteristic of the fiber insulation materials, and shows the material thermal capacity. This paper not only research basic properties of ceramic fiberboard, but also focus on the influence factors of the effective thermal conductivity which include bulk density, temperature and moisture content.

Sign in / Sign up

Export Citation Format

Share Document