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Thermal box-barrier for a direct measurement in high temperature environment
Affiliation:1. Chemical Engineering Division, CSIR-IICT, Hyderabad, India;2. School of Civil, Environmental & Chemical Engg, RMIT University, Australia;3. University College of Technology, Osmania University, Tarnaka, Hyderabad, India;4. School of Science, Engineering & Health office, RMIT University, Australia;1. University of Illinois at Urbana-Champaign, Department of Science and Engineering, Urbana, IL, USA;2. Creative Thermal Solutions, Urbana, IL, USA;1. Instituto Politécnico, Universidade do Estado do Rio de Janeiro, IPRJ/UERJ, Patrícia Oliva Soares Laboratory of Experimentation and Numerical Simulation in Heat and Mass Transfer, LEMA, Dept. of Mechanical Engineering and Energy, Nova Friburgo, RJ CEP 28625-570, Brazil;2. Laboratory of Nano- and Microfluidics and Microsystems, LabMEMS, Mechanical Engineering Dept. (PEM) & Nanoengineering Dept. (PENT) – POLI&COPPE, UFRJ, Universidade Federal do Rio de Janeiro, Cidade Universitária, Cx. Postal 68503, Rio de Janeiro, RJ CEP 21945-970, Brazil;3. Laboratory of Transmission and Technology of Heat, LTTC, Mechanical Engineering Dept. (PEM) – POLI&COPPE, UFRJ, Universidade Federal do Rio de Janeiro, Cidade Universitária, Cx. Postal 68503, Rio de Janeiro, RJ CEP 21945-970, Brazil;1. Faculty of Engineering, Amol University of Special Modern Technologies, Amol, Iran;2. Department of Mechanical Engineering, Tarbiat Modares University, P.O. Box 14115-143, Tehran, Iran
Abstract:Thermal box-barriers (TBB) are used for the thermal protection of measuring systems during exposure in a high temperature environment of various furnaces. This paper deals with problems of TBB design. TBB characteristics and limitations are discussed. The four-layer TBB structure is proposed for the high temperature application. The computer simulation results are presented to show the typical time evolution and spatial distribution of temperature in TBB. Problems of optimum proposal of individual layers thickness are mentioned. Temperatures in the manufactured TBB measured by thermocouples during tests and applications in industrial reheating furnaces are introduced in order to verify the computational results and to show its real thermal insulation capabilities.
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