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  4. Characteristic Curves of Iridium-Rhodium Sensing Elements in High-Temperature Transducer Applications

Characteristic Curves of Iridium-Rhodium Sensing Elements in High-Temperature Transducer Applications

JEECS.
2021;
Volume 7, Number 1
: pp. 62 – 67
https://doi.org/10.23939/jeecs2021.01.062
Received: April 04, 2021
Revised: May 17, 2021
Accepted: May 24, 2021

V. Fedynets, Y. Yusyk, I. Vasylkivskyi. Characteristic curves of iridium-rhodium sensing elements in high-temperature transducer applications. Energy Engineering and Control Systems, 2021, Vol. 7, No. 1, pp. 62 – 67. https://doi.org/10.23939/jeecs2021.01.062

Authors:
  1. Vasyl Fedynets
  2. Yaroslav Yusyk
  3. Ihor Vasylkivskyi
1
Lviv Polytechnic National University
2
Lviv Polytechnic National University
3
Lviv Polytechnic National University

In order to increase the capacity and efficiency factor of gas turbines and internal combustion engines while preserving their high reliability, the gas temperature and its distribution need to be measured in combustion chambers. Values of these temperatures can exceed 1800°С in an oxidizing atmosphere. Therefore, designing temperature transducers for measurements in such severe environments, special attention should be paid to the selection of thermometric materials. The requirements of the necessary accuracy and temperature range over 1800°С in an oxidizing atmosphere are fulfilled only by the temperature transducer based on iridium-rhodium alloys. The characteristic curve of such sensing elements is individual and each temperature transducer is to be calibrated. The paper discusses a technique of determining the individual characteristic curve of iridium-rhodium sensing elements of high-temperature transducers.  The preparation steps to be taken prior to the calibration and the main stages of determining the characteristic curve are described. The general view of the experimental set for calibrating the sensing elements is presented. Based on the calibration results, the form of approximating polynomial of the individual characteristic curve is proposed.

temperature
characteristic curve
Calibration
iridium-rhodium sensing elements
  1. Fedynets, V.O. Study of heat and electrical insulating materials for gas flow temperature measurement tools [Text] / V.O. Fedynets // Scientific Bulletin of UNFU. – 2011. – Vol. 21.1. – pp. 126 – 130. (in Ukrainian)
  2. Temperature measurement: theory and practice [Text] / [Lutsyk, Ya.T., Huk, O.P.,  Lakh, O.I., Stadnyk, B.I.]. – Lviv.: Beskyd Bit Publishers, 2006. – 560 p. (in Ukrainian)
  3. Stadnyk, B. Thermoelectric materials science and nanotechnology. Practice and theory [Text]  / B. Stadnyk, S. Yatsyshyn, Ya. Lutsyk, T. Burbela, T. Frohlich / Measuring Equipment and Metrology. Vol. 80, No. 2, 2019. – pp. 30-40. DOI: https://doi.org/10.23939/istcmtm2019.02.030  (in Ukrainian)
  4. Lieneweg, F. Temperature measurement in engineering. Handbook. Translated from German. [Text] – M.:Metallurgia, 1980. – 544 p. (in Russian)
  5. Thermoelectric temperature transducers. Part 1. Performance specification and tolerance of the electromotive force (EMF) :  DSTU EN 60584-1:2016 (EN 60584-1:2013, Idt). – [Effective 2016–11–01]. – Kyiv: State Committee of Ukraine for Technical Regulation and Consumer Policy, 2016. – 90 p. – (National Standards of Ukraine). (in Ukrainian)
  6. IEC 60584-1:2013. Thermocouples – Part 1: EMF specifications and tolerance.
  7. Fedynets, V.O. Calculation of optimal modes of calibration of high-temperature transducers [Text] / V.O. Fedynets // Scientific Bulletin of UNFU. – 2007. – Vol. 17.2. – pp. 92 – 97. (in Ukrainian)
  8. Numerical methods: tutorial [Text] / [V.M. Zadachin, I.H. Koniushenko]. – Kh.: Simon Kuznets Kharkiv National University of Economics Publishers, 2014. – 180 p. (in Ukrainian)