Heat conduction through layered refractory linings

A predictive model is developed for transient heat transfer analysis of structures with layered heterogeneous media. The model is particularly suited for the analysis of refractory concrete lined coal gasification and other similar chemical processing vessels. To allow for the effects of high conductivity gases in voids and cracks on the overall conductivity of the media, an effective conductivity model is developed. The model incorporates the effects of temperature dependent nonlinear material properties. Validity of the model is shown by comparing the predictions with those from an analytical solution for a special case, another numerical solution, and experimental measurements from an actual test vessel. Sensitivity of the temperature distribution to the presence of hydrogen gas in the vessel environment is evaluated.

[1]  O. Büyüköztürk,et al.  Thermomechanical Behavior of Refractory Concrete Linings , 1982 .

[2]  S. Thurston,et al.  Thermal Analysis of Thick Concrete Sections , 1980 .

[3]  O. Johansen.  Thermal Conductivity of Soils , 1977 .

[4]  M. S. Crowley.  Refractory problems in coal gasification reactors , 1975 .

[5]  S. Cheng,et al.  A technique for predicting the thermal conductivity of suspensions, emulsions and porous materials , 1970 .

[6]  S. Cheng,et al.  The prediction of the thermal conductivity of two and three phase solid heterogeneous mixtures , 1969 .

[7]  M. Beran.  Use of the vibrational approach to determine bounds for the effective permittivity in random media , 1965 .

[8]  O. K. Crosser,et al.  Thermal Conductivity of Heterogeneous Two-Component Systems , 1962 .

[9]  G. T. Tsao,et al.  Thermal Conductivity of Two-Phase Materials , 1961 .

[10]  M. S. Crowley,et al.  Effects of High-Conductivity Gases on the Thermal Conductivity of Insulating Refractory Concrete , 1958 .

[11]  A. L. Loeb.  Thermal Conductivity: VIII, A Theory of Thermal Conductivity of Porous Materials , 1954 .

[12]  H. Fricke,et al.  A Mathematical Treatment of the Electric Conductivity and Capacity of Disperse Systems I. The Electric Conductivity of a Suspension of Homogeneous Spheroids , 1924 .

[13]  L. Rayleigh,et al.  LVI. On the influence of obstacles arranged in rectangular order upon the properties of a medium , 1892 .

[14]  A. Hall.  Coal gasification poses demanding material requirements. [Discussion; no refs] , 1974 .

[15]  Benjamin Wilson.  A treatise on electricity , 1973 .

[16]  G. P. Mulholland,et al.  Diffusion through composite media , 1972 .

[17]  D. A. G. Bruggeman.  Berechnung verschiedener physikalischer Konstanten von heterogenen Substanzen. I. Dielektrizitätskonstanten und Leitfähigkeiten der Mischkörper aus isotropen Substanzen , 1935 .