Investigation of charge and discharge regimes of nanomodified heat-accumulating materials

Authors

  • Alexander Shchegolkov Tambov State Technical University Sovetskaya str., 106, Tambov, Russian Federation, 392000, Russian Federation https://orcid.org/0000-0002-4317-0689
  • Alexey Schegolkov Tambov State Technical University Sovetskaya str., 106, Tambov, Russian Federation, 392000, Russian Federation https://orcid.org/0000-0002-1838-3842
  • Nikolay Karpus Peoples' Friendship University of Russia (RUDN University) Miklukho-Maklaya str., 6, Moscow, Russian Federation, 117198, Russian Federation https://orcid.org/0000-0002-1451-5932
  • Vadym Kovalenko Ukrainian State University of Chemical Technology Gagarina ave., 8, Dnipro, Ukraine, 4900 Vyatka State University Moskovskaya str., 36, Kirov, Russian Federation, 610000, Ukraine https://orcid.org/0000-0002-8012-6732
  • Valerii Kotok Ukrainian State University of Chemical Technology Gagarina ave., 8, Dnipro, Ukraine, 49005 Vyatka State University Moskovskaya str., 36, Kirov, Russian Federation, 610000, Ukraine https://orcid.org/0000-0001-8879-7189

DOI:

https://doi.org/10.15587/1729-4061.2017.102888

Keywords:

heat accumulator, paraffin, modification, carbon nanotubes, thermal conductivity, heat capacity, charge/discharge

Abstract

Charge/discharge regimes of nanomodified paraffins have been studied. The nanomodification of paraffin was carried out by using the “Taunit” series nanomaterials with different morphological parameters under ultrasonic treatment. Comparative studies of thermophysical parameters (thermal conductivity and heat capacity) have been conducted for the prepared samples. Under charge/discharge regimes, the effect of “tracking thermal contact” manifests. The thermal conductivity increases to 0.48, 0.42 and 0.36 W/mºС in case of CNM-MD, CNM-M and CNM, relative to the initial thermal conductivity of 0.25 w/mºС. It has been established that the extreme on the thermal dependency graph depends on heat capacity ((57, 63 and 72 ºС for CNM, CNM-M and CNM-MD correspondingly). Modification of paraffin with carbon nanotubes allows controlling the phase-transition parameters, which allows obtaining a variety of temperature dependencies of heat capacity, thermal conductivity and physical-mechanical characteristics by combining different ratios of the “Taunit” series nanotubes and physical influences such as thermal fields and ultrasound. The heat-accumulating materials prepared in such a way allow achieving optimized operation of the heat accumulator under different temperature regimes.

Author Biographies

Alexander Shchegolkov, Tambov State Technical University Sovetskaya str., 106, Tambov, Russian Federation, 392000

PhD, Associate Professor

Department of Technics and technologies of nanomaterials production 

Alexey Schegolkov, Tambov State Technical University Sovetskaya str., 106, Tambov, Russian Federation, 392000

Postgraduate student

Department of Technics and technologies of nanomaterials production 

Nikolay Karpus, Peoples' Friendship University of Russia (RUDN University) Miklukho-Maklaya str., 6, Moscow, Russian Federation, 117198

PhD, Professor

Department of national economy

Vadym Kovalenko, Ukrainian State University of Chemical Technology Gagarina ave., 8, Dnipro, Ukraine, 4900 Vyatka State University Moskovskaya str., 36, Kirov, Russian Federation, 610000

PhD, Associate Professor

Department of Analytical Chemistry and Food Additives and Cosmetics

Department of Technologies of Inorganic Substances and Electrochemical Manufacturing

Valerii Kotok, Ukrainian State University of Chemical Technology Gagarina ave., 8, Dnipro, Ukraine, 49005 Vyatka State University Moskovskaya str., 36, Kirov, Russian Federation, 610000

PhD, Associate Professor

Department of Processes, Apparatus and General Chemical Technology

Department of Technologies of Inorganic Substances and Electrochemical Manufacturing

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Published

2017-06-19

How to Cite

Shchegolkov, A., Schegolkov, A., Karpus, N., Kovalenko, V., & Kotok, V. (2017). Investigation of charge and discharge regimes of nanomodified heat-accumulating materials. Eastern-European Journal of Enterprise Technologies, 3(12 (87), 23–29. https://doi.org/10.15587/1729-4061.2017.102888

Issue

Vol. 3 No. 12 (87) (2017): Materials Science

Section

Materials Science

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Copyright (c) 2017 Alexander Shchegolkov, Alexey Schegolkov, Nikolay Karpus, Vadym Kovalenko, Valerii Kotok

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