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TitleA thermocouple homogeneity scanner based on an open pressure-controlled water heatpipe
Publication TypeJournal Article
Year of Publication2010
AuthorsWhite, D.R., and Mason R.S.
JournalInternational Journal of Thermophysics
Pagination1654 - 1662
Date Published2010
ISSN0195928X (ISSN)
KeywordsBuffer gas, Homogeneity, Isothermal zones, Plastic membranes, Scanner, Scanning, Spatial regions, Thermocouples, uncertainty
AbstractThis paper demonstrates a low-cost, high-performance thermocouple homogeneity scanner based on a pressure-controlled water heatpipe that is open to the atmosphere. With this arrangement, very much like a steam-point apparatus, the atmosphere provides the controlled pressure and the buffer gas for the heatpipe, and the isothermal zone is close to 100 °C. The thermocouple is inserted into the steam within the heatpipe through a plastic membrane so that the gradient is imposed over a spatial region determined primarily by heat flow within the thermocouple body, and can be as small as a few millimeters. The paper explains the construction of the scanner, and presents results of example scans demonstrating the uniformity and resolution of the scanner. © Springer Science+Business Media, LLC 2010.

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