Clothing for protection against heat and flame -- Determination of heat transmission on exposure to both flame and radiant heat

2019 ◽  
Keyword(s):  
Radiant Heat ◽  
Heat Transmission

scholarly journals Determination of the pressing parameters of spruce water-resistant plywood

2008 ◽  
Vol 53 (No. 5) ◽  
pp. 231-242 ◽  
Author(s):  
J. Hrázský ◽  
P. Král
Keyword(s):  
Heat Transmission ◽  
Variable Parameters ◽  
Strength Coefficient ◽  
Shearing Strength

The paper summarizes results of operations aimed at determining the pressing parameters of spruce water-resistant plywood and testing the suitability of particular constructions of plywood. Constant and variable parameters were determined. In pressed plywood sheets, the shearing strength of gluing according to EW 100 and the coefficient of compressibility were determined. In pressing, heat transmission through the set of veneers was analyzed and effects of the moisture of veneers on heat transmission were tested. The percentage of resin hardening was also determined. Results were statistically analyzed. The dependence was determined of shearing strength, coefficient of compressibility and heat transmission on changes in pressing parameters. Results of the study consist in the proposal of pressing parameters for particular constructions of plywood.

Numerical Modeling of Heat and Mass Transport with Inner Heat Exchange in Unsaturated Porous Media

2020 ◽  
Vol 27 ◽  
pp. 166-176
Author(s):  
Jozef Kačur ◽  
Patrik Mihala
Keyword(s):  
Mathematical Model ◽  
Porous Media ◽  
Heat Exchange ◽  
Inverse Problems ◽  
Water Transport ◽  
Heat Conductivity ◽  
Unsaturated Porous Media ◽  
Heat Transmission ◽  
Matrix Heat

We are focused to the numerical modelling of heat, contaminant and water transport in unsaturated porous media in 3D. The heat exchange between water and porous media matrix is taken into the account. The determination of heat energy transmission coefficient and matrix heat conductivity is solved by means of inverse problem methods. The mathematical model represents the conservation of heat, contaminant and water mass balance. It is expressed by coupled non-linear system of parabolic-elliptic equations. Mathematical model for water transport in unsaturated porous media is represented by Richard's type equation. Heat transport by water includes water flux, molecular diffusion and dispersion. A successful experiment scenario is suggested to determine the required parameters including heat transmission and matrix heat conductivity coefficients. Additionally we investigate contaminant transport with heat transmission and contaminant adsorption. The obtained experiments support our method suitable for solution of direct and inverse problems. This problem we have discussed previously in 1D model, but preferential streamlines in 1D thin tubes shadow accurate results in determination of required parameters. In our presented setting we consider a cylindrical sample which is suitable in laboratory experiments for inverse problems.

scholarly journals Thermographic determination of the sheath heat transmission coefficient in a high density plasma

2013 ◽  
Vol 438 ◽  
pp. S431-S434 ◽  
Author(s):  
M.A. van den Berg ◽  
K. Bystrov ◽  
R. Pasquet ◽  
J.J. Zielinski ◽  
G. De Temmerman
Keyword(s):  
Transmission Coefficient ◽  
High Density ◽  
Heat Transmission ◽  
Density Plasma

Development of Thermoelectric generating modules and system

2005 ◽  
Vol 886 ◽  
Author(s):  
Toshinori Ota ◽  
Chieko Tokunaga ◽  
Kouichi Fujita
Keyword(s):  
Thermoelectric Module ◽  
Radiant Heat ◽  
Industrial Furnace ◽  
Heat Transmission ◽  
Thermoelectric Conversion ◽  
Conversion Characteristic ◽  
Cascade Connection ◽  
Heat Insulator ◽  
Electric Resistance Heating ◽  
Module Performance

AbstractIshikawajima–Harima Heavy Industries Co., Ltd. (IHI) is currently investigating applications of thermoelectric conversion systems based on the usage of radiant heat for industrial furnaces. The thermoelectric module units, which have been connected to a water-cooled jacket wall inside an electric resistance-heating-type industrial furnace, receive the heat originating from the in-furnace heat insulator by means of radiation, and collect the electric power based on the temperature difference. In this work, experimental results are presented, concerning the mechanical characteristics of a two-step cascade connection type module based on the heat transmission and thermoelectric conversion characteristic.The module performance analytic result, which turned character of several physical properties of the thermal radiation receiver of the upper part of modules, heat transmission characteristic, and the result, which performed the foundation examination for industrial furnace application, is reported.

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