Design Concepts for a New Guarded Hot Plate Apparatus for Use Over an Extended Temperature Range

Published

October 1, 2002

Author(s)

D R. Flynn, Robert R. Zarr, Mahn-Hee Hahn, William M. Healy

Abstract

The National Institute of Standards and Technology is building a new guarded hot plate apparatus (GHP) for use at temperatures from 90 K to 900 K, with provision to conduct tests in various gases at controlled pressures from 0.013 Pa to 0.105 MPa (approximately equal to} 1.04 atm). Important features of the design of the new NIST GHP include: enclosure of the entire apparatus in a vacuum chamber; solid metal hot plates and cold surface plates to provide highly isothermal surfaces in contact with the test specimens; an integral close-fitting edge guard to minimize the effects of edge heat losses or gains; connection guard blocks to minimize the effects of heat conduction along coolant lines, heater leads, thermometry wells, and sensor leads coming from the hot plate and the cold plates; provision of a system to provide a known clamping force between the specimens and the contacting hot and cold plate surfaces; provision of an accurate system for in-situ measurement of specimen thickness during a test and the use of three long-stem standard platinum resistance thermometers to measure the average temperature of the meter plate and the two cold plates.

Proceedings Title

Insulation Materials: Testing and Applications, Symposium | 4th | Insulation Materials: Testing and Applications: ASTM Special Technical Publication

Volume

1426

Conference Dates

October 21-22, 2002

Conference Location

Undefined

Conference Title

American Society for Testing and Materials

Pub Type

Conferences

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Keywords

guarded hot plate, heat conduction, heat transfer, insulaton, R-value, thermal conductivity, thermal insulation, thermal resistance

Citation

Flynn, D. , Zarr, R. , Hahn, M. and Healy, W. (2002), Design Concepts for a New Guarded Hot Plate Apparatus for Use Over an Extended Temperature Range, Insulation Materials: Testing and Applications, Symposium | 4th | Insulation Materials: Testing and Applications: ASTM Special Technical Publication, Undefined, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=860860 (Accessed September 14, 2024)