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RESEARCH PAPERS

Thermophysical Property Measurements Using an Encapsulated Bead Thermistor: Applications to Liquids and Insulation Materials

[+] Author and Article Information
Brian P. Dougherty

Heat Transfer Group, Building Environment Division, National Institute of Standards and Technology, Gaithersburg, MD 20899

William C. Thomas

Mechanical Engineering Department, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061

J. Sol. Energy Eng 114(1), 23-31 (Feb 01, 1992) (9 pages) doi:10.1115/1.2929977 History: Received September 01, 1990; Revised October 01, 1991; Online June 06, 2008

Abstract

A technique for simultaneously measuring thermal conductivity and thermal diffusivity was evaluated for applications with insulation materials and liquids. The thermophysical properties are determined from a single, transient measurement. The measurement apparatus employs an encapsulated bead thermistor as the sensing probe. The results from using a glass-encapsulated and a teflon-encapsulated bead thermistor are described.

Copyright © 1992 by The American Society of Mechanical Engineers
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