DATABASE COMPLETED ON HEAT TRANSMISSION PROPERTIES OF THERMAL INSULATION AND BUILDING MATERIALS.NIST (National Institute of Standards & Technology, Washington, DC, www.nist.gov) The standards-defining agency of the U.S. government, formerly the National Bureau of Standards. It is one of three agencies that fall under the Technology Administration (www.technology. has just completed NIST Standard Reference Database 81 on Heat Transmission Properties of Insulating and Building Materials (Web Version 1.0). The database is a collection of thermal conductivity data produced by NIST from 1932 to 1983 using the NIST 200 mm guarded-hot-plate apparatus. During its service, the apparatus was the U.S. national standard for thermal conductivity measurements of insulating and building materials. The database contains 2175 records of thermal conductivity data for a variety of thermal insulation materials such as cellular plastics, corkboard cork·board n. A construction and insulating sheet material made of compressed and baked granules of cork. Noun 1. corkboard , glass fiber, among others, as well as building materials such as fiberboard fi·ber·board n. A building material composed of wood chips or plant fibers bonded together and compressed into rigid sheets. Noun 1. and lightweights concrete. The proper design of heating, refrigeration refrigeration, process for drawing heat from substances to lower their temperature, often for purposes of preservation. Refrigeration in its modern, portable form also depends on insulating materials that are thin yet effective. , and air-conditioning equipment for buildings and industrial applications depends, in part, on accurate computation of heat transmission through the components of the building envelope. Accurate heat transmission computations, in turn, require reliable values for heat transmission properties. For several decades, tabulated values of heat transmission properties of insulating and building materials such as those found in the ASHRAE ASHRAE American Society of Heating, Refrigerating & Air Conditioning Engineers Fundamentals Handbook have provided typical values for the heat transmission properties of common insulating and building materials. The NIST database is intended primarily as an authoritative reference for tabulated handbook data for the heat transmission properties of insulating and building materials. |
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