- Author
-
Zarr, R. R.
|
Somers, T. A.
- Title
- Thermal Conductivity of Fumed Silica Board at Room Temperature.
- Coporate
- National Institute of Standards and Technology, Gaithersburg, MD
- Book or Conf
- Thermal Conductivity Conference, 21st International. Thermal Conductivity 21. October 15-18, 1989,
Plenum Press, New York,
Lexington, KY,
Cremers, C. J.; Fine, H. A., Editors,
247-259 p.,
1990
- Keywords
-
silica
|
thermal conductivity
|
insulation
|
hot plate
|
equipment
|
density effects
|
moisture content
|
humidity
|
pressure
|
certification
- Abstract
- The thermal conductivity of fumed-silica board insulation was measured using the 1-metre guarded hot plate at the National Institute of Standards and Technology (NIST). Measurements were conducted for the following ranges: bulk density, 304.5 to 325.4 kg/m3; and air pressure, 97.51 to 103.43 kPa. The effect of moisture content on room-temperature measurements was minimized by prior conditioning of the specimen at 100 deg C for 24 hours. A linear equation having two independent parameters, bulk density and air pressure, was fit to thirty-five data points. Certified values of thermal resistance at room temperature were calculated for the following ranges of bulk density and air pressure: 300 to 330 kg/m3 and 97 to 102 kPa, respectively. The Office of Standard Reference Materials of NIST in Gaithersburg, Maryland, UDS has made available two Standard Reference Materials (SRMs) of fumed-silica board, SRMs-1449 and 1459.