Please use this identifier to cite or link to this item:
http://hdl.handle.net/2445/187960
Title: | A micromachined thermoelectric sensor for natural gas analysis: Multivariate calibration results |
Author: | Udina Oliva, Sergi Carmona Flores, Manuel Pardo Martínez, Antonio Calaza, C. Santander, J. Fonseca, L. Marco Colás, Santiago |
Keywords: | Gas natural Detectors de gasos Termoelectricitat Natural gas Gas detectors Thermoelectricity |
Issue Date: | 20-May-2012 |
Publisher: | Elsevier B.V. |
Abstract: | The potential use of a micromachined thermopile based sensor device for analyzing natural gas is explored. The sensor consists of a thermally isolated hotplate, which is heated by the application of a sequence of programmed voltages to an integrated heater. Once the hotplate reaches a stationary temperature, the thermopile provides a signal proportional to the hotplate temperature. These signals are processed in order to determine different natural gas properties. Sensor response is mainly dependent on the thermal conductivity of the surrounding gas at different temperatures. Seven predicted properties (normal density, superior heating value, Wobbe index and the concentrations of methane, ethane, carbon dioxide and nitrogen) are calibrated against sensor signals by using multivariate regression, in particular partial least squares. Experimental data have been used for calibration and validation. Results show property prediction capability with reasonable accuracy except for prediction of carbon dioxide concentration. A detailed uncertainty analysis is provided to better understand the metrological limits of the system. These results imply for the first time the possibility of designing unprecedented low-cost natural gas analyzers. The concept may be extended to other constrained gas mixtures (e.g. of a known number of components) to enable low-cost multicomponent gas analyzers. |
Note: | Versió postprint del document publicat a: https://doi.org/10.1016/j.snb.2011.11.086 |
It is part of: | Sensors and Actuators B-Chemical, 2012, vol. 166-167, p. 338-348 |
URI: | http://hdl.handle.net/2445/187960 |
Related resource: | https://doi.org/10.1016/j.snb.2011.11.086 |
ISSN: | 0925-4005 |
Appears in Collections: | Articles publicats en revistes (Enginyeria Electrònica i Biomèdica) Articles publicats en revistes (Institut de Bioenginyeria de Catalunya (IBEC)) |
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614527.pdf | 2.91 MB | Adobe PDF | View/Open |
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