Electric heaters with the effect of self-regulation of fuel system temperature in diesel engines



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Abstract

BACKGROUND: Diesel internal combustion engines (ICE) are massively used as powerunits of automotive and tractor machinery, as they have high energy efficiency and reliability. It is very important to provide the fastest possible start-up for internal combustion engines and stable idling operation at ambient temperatures in the range from -40 to 0 °C, especially in the winter period of operation. One of the approaches connected with improvement of conditions of starting a diesel engine in cold season is application of electric heating system, including the use of heater materials based on composites with positive temperature resistance coefficient that allows adapting the heating system to minimum power consumption. Development of the design of the electric heating system for diesel engine fuel filters, the control system and the algorithm of its operation is a relevant technical task.

AIM: Development of electro-heating polymer composites (EHPC) containing multilayer carbon nanotubes (MCNTs) for diesel engine fuel filters.

METHODS: An elastic organosilicon compound was used as a polymer matrix, and MCNTs synthesized by ultrahigh frequency electromagnetic radiation (UHF method) by exposure to a mixture of ferrocene and graphite in a 1:1 ratio were used as an electrically conductive dispersed filler. The surface morphology of MCNTs was studied with a scanning electronic microscope at 5 kV. The temperature field was studied using the “Testo-875-1” thermal imager with an optical lens of 32 × 23°.

RESULTS: The technical solution for heating the fuel filter of diesel engine by means of heating elements ensuring direct control and stabilization of the temperature mode in the process of diesel fuel thermoregulation is considered. Polarization of polymer matrix and tunneling of elementary charge in MCNTs lie in the basis of the process of electric heating of composite material at the electric current. Programmable parameters of the microcontroller were used for thermoregulation in the process of electric heating and sustaining the given temperature mode, which makes it possible to eliminate the decrease in the heating rate of EHPCs and to increase their energy efficiency in a wide range of temperatures of operation of the fuel supply equipment of an internal combustion engine. To form the software for the EHPCs control system, 5 operation modes including start-up, idling and modes under load (25, 50, 75% of the nominal value of the full load of the internal combustion engine) were used.

CONCLUSION: The practical value of the study lies in the possibility of using the proposed electric heaters for controlled heating of fuel with a given temperature, which reduces the load on the battery and significantly expands the potential capabilities of electric heating technologies for automotive and tractor machinery.

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About the authors

Alexander V. Shchegolkov

Tambov State Technical University

Author for correspondence.
Email: Energynano@yandex.ru
ORCID iD: 0000-0002-4317-0689
SPIN-code: 4893-5232

Cand. Sci. (Engineering), Assistant Professor

Russian Federation, Tambov

Alexey V. Shchegolkov

Moscow Polytechnic University

Email: alexxx5000@mail.ru
ORCID iD: 0000-0002-1838-3842
SPIN-code: 4929-5059

Cand. Sci. (Engineering), Assistant Professor

Russian Federation, Moscow

References

  1. Deng Y, Liu H, Zhao X, et al. Effects of cold start control strategy on cold start performance of the diesel engine based on a comprehensive preheat diesel engine model. Applied Energy. 2018;210:279–287. doi: 10.1016/j.apenergy.2017.10.093
  2. Markov VA, Shlenov MI, Boldyrev AV, et al. Calculation study of air temperature influence on diesel engine performance. Automobile industry. 2024;(2):3–7. (In Russ.) EDN: PCQYKB
  3. Sun H, Zhang, W, Wang Y. Experimental study on improving cold start performance of diesel engines at extremely low ambient temperatures with diethyl ether. Energy. 2023;283(129122). ISSN 0360-5442. doi: 10.1016/j.energy.2023.129122
  4. Kramarenko GV, Nikolaev VA, Shatalov AI. Garageless storage of cars at low temperatures. Мoscow: Transport, 1984:136. (In Russ.) EDN: WBJQYH
  5. Park S, Woo S, Shon J, Lee, K. Experimental study on heat storage system using phase-change material in a diesel engine. Energy. 2017;119:1108–1118. doi: 10.1016/j.energy.2016.11
  6. Soliman AS, Radwan A, Xu L, et al. Energy harvesting in diesel engines to avoid cold start-up using phase change materials. Case Studies in Thermal Engineering. 2022;31:101807. doi: 10.1016/j.csite.2022.101807
  7. Borisov GA, Kolodyazhnaya IN, Ichankin YV, Chernyshev AD. System of electric fuel heating in the supply system of diesel vehicles. Bulletin of the Ryazan State Agrotechnological University named after P.A. Kostychev. 2014;(23):39–42. (In Russ.) EDN: TGDOTD
  8. Shchegolkov AV, Shchegolkov AV. Anti-icing systems based on elastomers modified with carbon nanostructures with the effect of temperature self-regulation. Arctic and Subarctic Natural Resources. 2022;27(1):141–151. (In Russ.) doi: 10.31242/2618-9712-2022-27-1-141-151
  9. Musat R, Helerea E. Characteristics of the PTC Heater Used in Automotive HVAC Systems. Emerging Trends in Technological Innovation. 2010:461–468. doi: 10.1007/978-3-642-11628-5_51
  10. Patent RUS No. 216724 / 22.02.2023. Zemtsova NV, Shchegolkov AV, Trufanov BS. Electric heater based on elastic matrix and conductive carbon and metal additives. EDN: LWASTY
  11. Patent RUS 2398126 / 27.08.2010. Kalinin VF, Shchegolkov AV. System for thermal regulation of fuel and engine oil in internal combustion engines. EDN: QDHVFG
  12. Shchegolkov AV, Shchegolkov AV, Chumak MA, et al. Synthesis of carbon nanotubes using microwave radiation for elastomer modification with improved electrical and thermal conductivity. Prospective Materials. 2024;4:54–65. (In Russ.) doi: 10.30791/1028-978X-2024-4-54-65
  13. Shchegolkov AV, Nachtane M, Stanishevskiy YM, et al. The Effect of Multi-Walled Carbon Nanotubes on the Heat-Release Properties of Elastic Nanocomposites. Journal of Composites Science. 2022;6(11):333. (In Russ.) doi: 10.3390/jcs6110333
  14. Shchegolkov A, Shchegolkov A, Zemtsova N, et al. Properties of Organosilicon Elastomers Modified with Multilayer Carbon Nanotubes and Metallic (Cu or Ni) Microparticles. Polymers. 2024;16(6):774. (In Russ.) doi: 10.3390/polym16060774
  15. Kalinin VF, Shchegolkov AV. System of electric heating of supply air and fuel thermoregulation in diesel engines. Vestnik of Tambov State Technical University. 2009;15(2):396–400. (In Russ.) EDN: KHPMTV

Supplementary files

Supplementary Files
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1. JATS XML
2. Fig. 1. Structural scheme of an electrically heated polymer composite а: 1: dielectric shell; 2: current collector; 3: functional material of the heater; 4: lead wires; b: general view of flat heaters.

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3. Fig. 2. Morphological and structural properties of carbon nanotubes with metallization: а: scanning electronic microscopy of metallized multilayer carbon nanotubes; b: Raman scattering spectrum of multilayer carbon nanotubes.

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4. Fig. 3. Electrically heated polymer composite in a fuel filter with wiring scheme: а: location of electro-heating polymer composite in the fuel filter (FTO); b: wiring scheme of the switching on electro-heating polymer composite: 1: fuel filter; 2: electro-heating polymer composite; 3: filtering element; 4: element for elimination of high currents.

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5. Fig. 4. The electrically heated polymer composite (ENPC) control system.

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6. Fig. 5. Thermal curves of a crankcase with engine oil and a fuel filter: а: dynamics of temperature mode change; b: inrush current of heating elements.

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7. Fig. 6. Algorithm of diesel fuel heating with thermal regulation.

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8. Fig. 7. Internal filter elements with a heater and thermal fields of the heating element with the filter: а: fuel filter; b: thermogram of the internal cavity of the fuel filter; c: distribution of the temperature field at the lateral contact with the filter; d: thermogram of the heater.

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