Thermal Conductivity Measurement of Solid Materials by Thermistor Direct Heating Method
DOI:
https://doi.org/10.20535/1810-0546.2017.2.96328Keywords:
Thermal conductivity, Thermistor direct heating method, Experimental device, Thermophysical characteristics of solid materialsAbstract
Background. This work addresses the development of an experimental device and increasing the accuracy of determining the thermal conductivity of solid materials by thermistor direct heating method.
Objective. The aim of the paper is to create the installation, conduct experimental studies to determine the value of the thermal conductivity of solid materials by thermistor direct heating method and to research destabilizing factors that affect the measurement error, and to suggest ways to increase the accuracy of measurements.
Methods. Experimental device has been created, which work is based on the direct heating method of the thermistor and necessary researches have been carried out. The results of the measurement are given by setting the thermal conductivity coefficients of various materials, which make it possible to expand the scope of the method.
Results. Rational operating modes and design of probes for measuring the thermal conductivity of solid materials depending on their TPC are proposed and justified. Ways to reduce the measurement error by thermistor direct heating method are presented. Investigation of destabilizing factors influencing the measurement error made it possible to determine means of reducing their influence on the results of determining the thermal conductivity of solid materials and to suggest ways to increase the accuracy of measurements.
Conclusions.The experimental device has been tested experimentally and implemented in the research and production activities of “VIRCOM” and in the educational process of the Department of Instrumentation Design and Engineering of the National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute”.
References
D.A. Lyubimova et al., Measurement of Thermal Properties of Thermal Insulation Materials by Regular Condition of the Third Kind. Tambov, Russia: FGBOU VPO TGTU, 2014 (in Russian).
A.V. Zharov et al., “The experimental method of measuring the thermal conductivity of nanofluids”, Fundamental'nye Issledovaniya, no. 6-8, pp. 1345–350, 2014 (in Russian).
V.E. Kutsakova et al., Refrigerated Food Technology. St. Petersburg, Russia: GIORD, 2007 (in Russian).
V.I. Filippov, “The application of regular thermal regime methods for determining the thermal characteristics of foods”, Nauchnyj Zhurnal NIU ITMO, no. 3, 2015, pp. 22–30 (іn Russian).
S. Matvienko et al., “Increasing accuracy of measuring thermal conductivity of liquids by using the direct heating thermistor method”, Eastern-European J. Enterprise Technol., vol. 4, no. 5 (82), pp. 20–30, 2016. doi: 10.15587/1729-4061.2016.75459
S.V. Ponomarev et al., “Estimation of errors in measuring the thermophysical properties of solid materials”, Izmeritelnaya Tekhnika, no. 1, 2004, pp. 44–47 (In Russian).
D.V. Akulenko et al., “The measurement of thermal conductivity medium using a direct heating thermistor method”, Problemy Tekhnogennoy Bezopasnosti i Ustoychivogo Razvitiya FGBOU VPO TGTU, no. III, pp. 49–52, 2012 (in Russian).
S. Matvienko et al., “Determination thermal and physical characteristics of liquids using pulse heating thermistor method”, Int. J. Eng. Res. Sci., vol. 2, no. 5, pp. 250–258, 2016.
Ľ. Kubičár et al., “Hot-ball method for measuring thermal conductivity”, Int. J. Thermophys., vol. 31, no. 10, pp. 1904–1918, 2010. doi: 10.1007/s10765-008-0544-4
S. Matvienko et al., “Accuracy improvement of thermal conductivity measurement of liquids used by direct heating thermistor method”, Naukovі Vіstі NTUU KPІ, no. 6, pp. 85–93, 2016 (in Ukrainian). doi: 10.20535/1810-0546.2016.6.83382
The State System of Ensuring the Uniformity of Measurements. Direct Measurements with Multiple Observations. Methods of Treatment of Observations, DSTU GOST 8.207:2008, Oct. 01, 2008 (in Ukrainian).
Downloads
Published
Issue
Section
License
Copyright (c) 2017 NTUU KPI Authors who publish with this journal agree to the following terms:- Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under CC BY 4.0 that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
- Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
- Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work
