Measurements of the thermal conductivity of molten lead using a new transient hot wire sensor
Measurements of the thermal conductivity of molten lead using a new transient hot wire sensor
The paper reports new measurements of the thermal conductivity of molten
lead at temperatures from 600 to 750 K. The measurements have been carried
out with an updated version of a modified transient hot-wire (THW)
method, where the hot-wire sensor is embedded within an insulating substrate
with a planar geometry. However, unlike previous sensors of the same type,
the updated sensor works with the hot-wire divided into three thermally isolated
parts. The operation of this sensor has been modeled theoretically using
a finite-element (FE) analysis and has subsequently been confirmed by direct
observation. The new sensor is demonstrated to have a higher sensitivity and
a better signal-to-noise ratio than earlier sensors. Molten lead is used as the
test fluid. It has the lowest thermal conductivity of any material we have yet
studied. This allows us to probe the limits of our sensor system for the thermal
conductivity of high-temperature melts. It is estimated that the uncertainty
of the measurements is 3% over the temperature range studied. The
results are used to examine the application of the Wiedemann–Franz (W-F)
relationship.
molten lead, sensor design, thermal conductivity, transient hot-wire
496-505
Bilek, Jaromir
44c35320-4330-4f07-9ec8-2d180390116f
Atkinson, John
5e9729b2-0e1f-400d-a889-c74f6390ea58
Wakeham, William
88549729-a39a-497f-b112-feaa6be2c449
May 2007
Bilek, Jaromir
44c35320-4330-4f07-9ec8-2d180390116f
Atkinson, John
5e9729b2-0e1f-400d-a889-c74f6390ea58
Wakeham, William
88549729-a39a-497f-b112-feaa6be2c449
Bilek, Jaromir, Atkinson, John and Wakeham, William
(2007)
Measurements of the thermal conductivity of molten lead using a new transient hot wire sensor.
International Journal of Thermophysics. Proceedings of the Fifteenth Symposium on Thermophysical Properties, Part II, 28 (2), .
(doi:10.1007/s10765-007-0182-2).
Abstract
The paper reports new measurements of the thermal conductivity of molten
lead at temperatures from 600 to 750 K. The measurements have been carried
out with an updated version of a modified transient hot-wire (THW)
method, where the hot-wire sensor is embedded within an insulating substrate
with a planar geometry. However, unlike previous sensors of the same type,
the updated sensor works with the hot-wire divided into three thermally isolated
parts. The operation of this sensor has been modeled theoretically using
a finite-element (FE) analysis and has subsequently been confirmed by direct
observation. The new sensor is demonstrated to have a higher sensitivity and
a better signal-to-noise ratio than earlier sensors. Molten lead is used as the
test fluid. It has the lowest thermal conductivity of any material we have yet
studied. This allows us to probe the limits of our sensor system for the thermal
conductivity of high-temperature melts. It is estimated that the uncertainty
of the measurements is 3% over the temperature range studied. The
results are used to examine the application of the Wiedemann–Franz (W-F)
relationship.
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More information
Published date: May 2007
Additional Information:
Presented at the Sixteenth Symposium of Thermophysical Properties, Boulder, USA, 30 Jul - 04 Aug 2006
Keywords:
molten lead, sensor design, thermal conductivity, transient hot-wire
Identifiers
Local EPrints ID: 47754
URI: http://eprints.soton.ac.uk/id/eprint/47754
ISSN: 0195-928X
PURE UUID: 87123d13-7338-461e-b079-ef9fc97a9048
Catalogue record
Date deposited: 14 Aug 2007
Last modified: 16 Mar 2024 02:32
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Contributors
Author:
Jaromir Bilek
Author:
William Wakeham
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