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Publication details

Title
New portable instrument for the measurement of thermal conductivity in gas process conditions

Authors
C. S. G. P. Queirós
Dep. Química e Bioquímica
CQE-Ciências - Centro de Química Estrutural-Ciências
M. J. V. Lourenço
Dep. Química e Bioquímica
CQE-Ciências - Centro de Química Estrutural-Ciências
S. I. Vieira
Dep. Química e Bioquímica
CCMM - Centro de Ciências Moleculares e Materiais 
J. M. Serra
Dep. Engenharia Geográfica, Geofísica e Energia
IDL - Instituto Dom Luiz
CQE-Ciências - Centro de Química Estrutural-Ciências
C. A. Nieto de Castro
Dep. Química e Bioquímica
CQE-Ciências - Centro de Química Estrutural-Ciências

Document type
Journal articles

Scope
International

Refereeing
Yes

Document type
Full paper

Summary
The development of high temperature gas sensors for the monitoring and determination of thermophysical properties of complex process mixtures at high temperatures faces several problems, related with the materials compatibility, active sensing parts sensitivity and life-time. Ceramic/thin metal films based sensors, previously developed for the determination of thermal conductivity of molten materials up to 1200 °C, were redesigned, constructed and applied for thermal conductivity measuring sensors. Platinum resistance thermometers were also developed using the same technology, to be used in the temperature measurement, were also constructed and tested. A new data acquisition system for the thermal conductivity sensors, based on a linearization of the transient hot-strip model, including a portable electronic bridge for the measurement of the thermal conductivity in gas process conditions was also developed. The equipment is capable of measuring the thermal conductivity of gaseous phases with an accuracy of 2-5% up to 840 ºC, (95% confidence level). The development of sensors up to 1200 °C, present at the core of the combustion chambers, will be done in a near future.

Date of Publication
2016-06-00

Institution
FACULDADE DE CIÊNCIAS DA UNIVERSIDADE DE LISBOA

Where published
Review of Scientific Instruments

ISSN
0034-6748

eISSN
1089-7623

Publisher
AIP Publishing

Volume
87
Number
6

Starting page
065105

Identifiers
DOI - http://dx.doi.org/10.1063/1.4952745

Rankings
SCOPUS Q2 (2016) - 0.703 - Instrumentation
Web Of Science Q3 (2017) - 1.428 - PHYSICS, APPLIED - SCIE
SCIMAGO Q1 (2016) - 0.703 - Instrumentation

Keywords
High temperatures Gas processing Thermal conductivity Thin film sensor


Export

APA
C. S. G. P. Queirós, M. J. V. Lourenço, S. I. Vieira, J. M. Serra, C. A. Nieto de Castro, (2016). New portable instrument for the measurement of thermal conductivity in gas process conditions. Review of Scientific Instruments, 87, ISSN 0034-6748. eISSN 1089-7623. http://dx.doi.org/10.1063/1.4952745

IEEE
C. S. G. P. Queirós, M. J. V. Lourenço, S. I. Vieira, J. M. Serra, C. A. Nieto de Castro, "New portable instrument for the measurement of thermal conductivity in gas process conditions" in Review of Scientific Instruments, vol. 87, 2016. 10.1063/1.4952745

BIBTEX
@article{38642, author = {C. S. G. P. Queirós and M. J. V. Lourenço and S. I. Vieira and J. M. Serra and C. A. Nieto de Castro}, title = {New portable instrument for the measurement of thermal conductivity in gas process conditions}, journal = {Review of Scientific Instruments}, year = 2016, volume = 87 }