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The Initial Boiling Point of Lubricating Oil as an Indicator for the Assessment of the Possible Contamination of Lubricating Oil with Diesel Oil

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  • Leszek Chybowski

    (Department of Machine Construction and Materials, Faculty of Marine Engineering, Maritime University of Szczecin, ul. Willowa 2, 71-650 Szczecin, Poland)

Abstract

This article provides a brief introduction to the indicators of the volatility and flammability of lubricating oils and fuels. It is proposed that the initial boiling point be used as an indicator of the contamination of lubricating oil with distillate fuel (i.e., diesel biofuel oil) in the context of the rapid detection of explosion risks in the crankcase. Detailed tests were carried out on lubricating oil samples (SAE 30 and SAE 40 grades, which are most commonly used in the lubrication systems of marine trunk engines) diluted with diesel oil at selected mass concentrations (0, 1, 2, 5, 10, 20, 50, and 100%). The oils were tested to determine their relevant properties: the flash point temperature and the initial boiling temperature. The flash point was determined in a closed crucible using the Pensky–Martens method, which is in accordance with PN-EN ISO 2719. The differences between the initial boiling point and the flash point of the tested lubricating oils were determined for different dilution levels of lubricating oil in diesel fuel. An approximate method for the calculation of the flash point of the oil based on the initial boiling point is proposed. The results of oil flash point measurements are compared with values calculated as a function of the boiling point for both lubricating oils tested. An evaluation of how well models fit the experimental results is reported. Conclusions are presented on the applicability of the proposed method during operational practice.

Suggested Citation

  • Leszek Chybowski, 2022. "The Initial Boiling Point of Lubricating Oil as an Indicator for the Assessment of the Possible Contamination of Lubricating Oil with Diesel Oil," Energies, MDPI, vol. 15(21), pages 1-14, October.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:21:p:7927-:d:953047
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    References listed on IDEAS

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    1. Nils Kretzschmar & Markus Seifert & Oliver Busse & Jan J. Weigand, 2022. "Prediction of Retention Indices and Response Factors of Oxygenates for GC-FID by Multilinear Regression," Data, MDPI, vol. 7(9), pages 1-12, September.
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    Cited by:

    1. Leszek Chybowski & Przemysław Kowalak & Piotr Dąbrowski, 2023. "Assessment of the Impact of Lubricating Oil Contamination by Biodiesel on Trunk Piston Engine Reliability," Energies, MDPI, vol. 16(13), pages 1-30, June.
    2. Leszek Chybowski & Marcin Szczepanek & Katarzyna Gawdzińska & Oleh Klyus, 2023. "Particles Morphology of Mechanically Generated Oil Mist Mixtures of SAE 40 Grade Lubricating Oil with Diesel Oil in the Context of Explosion Risk in the Crankcase of a Marine Engine," Energies, MDPI, vol. 16(9), pages 1-27, May.
    3. Leszek Chybowski, 2023. "Study of the Relationship between the Level of Lubricating Oil Contamination with Distillation Fuel and the Risk of Explosion in the Crankcase of a Marine Trunk Type Engine," Energies, MDPI, vol. 16(2), pages 1-38, January.

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