- Author
- Dougherty, B. P. | Thomas, W. C.
- Title
- Thermophysical Property Measurement in Building Insulation Materials Using a Spherically-Shaped, Self-Heated Probe.
- Coporate
- Virginia Polytechnic Institute and State Univ., Blacksburg
- Sponsor
- National Bureau of Standards, Gaithersburg, MD
- Contract
- NBS-GRANT-60NANB6D0642
- Book or Conf
- Thermal Conductivity, 20, Plenum Publishing Corp., New York, NY, Hasselman, D. P. H.; Thomas, J. R., Jr., Editors, 47-59 p., 1989
- Keywords
- insulating materials | thermophysical properties | building materials | probes | thermal conductivity | thermistors | diffusivity
- Abstract
- A technique for making in situ thermal conductivity and diffusivity measurements of building insulation materials was investigated. The two thermophysical properties are simultaneously determined given the result from a single transient test. The measurement apparatus consists of an effectively spherical, small-volume probe that is interfaced with a computer-based data acquisition and control system. Although different small-volume probes were evaluated, encapsulated bead thermistors received the most interest and so are emphasized in this paper. The results from using the technique to measure the thermal conductivity of five insulation materials are included.