Innovative testing methods and their application possibilities in technical practice

Kovács, Róbertné and Greznár, Márk and Nagy, Valéria (2022) Innovative testing methods and their application possibilities in technical practice. ANNALS OF FACULTY OF ENGINEERING HUNEDOARA - INTERNATIONAL JOURNAL OF ENGINEERING, Tome X (Fascic). pp. 61-66. ISSN 1584-2665

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Abstract

Nowadays, the mission of coolants used for internal combustion engines is complex: the primary task is to perform the cooling and additional corrosion preventing, furthermore to keep the impact on the environment to a negligible level is also a basic requirement. It is in the common interest of manufacturers and users alike for this mission to be fully realised. As university lecturer, researcher, engineer and student, we are working together and turning with curiosity on a topic of interest to both industry and society. In the present paper, keeping in mind the previous ideas but taking advantage of the researcher’s freedom, the basic objective of the research work is the dielectric study of various engine coolants (Glicosam Z, Prelix P, Prelix Z, Sheron K, Sheron P) using the DAK-3.5 (Dielectric Assessment Kit) measuring system. The tests were performed in the microwave range (limited to the frequency range 200–2400 MHz) and at specific temperatures (20°C, 30°C, 40°C, 50°C) and at the manufacturer's recommended dilution ratio (with deionized water). The electromagnetic behaviour of the selected coolant samples pointed to different compositions of the engine coolants, production technology and the material quality characteristics attributable to the different concentrations. Actually, the behavioural characteristics of the coolants complete the list of physical and chemical parameters in the product data sheet and safety data sheet of the coolants, providing users with more and more complete information. Among the test results of the coolant samples, the measurement results are presented at 900 MHz and 2400 MHz, namely the relationship between the imaginary part of the complex permittivity (ε”) and the antifreeze capacity (t). An additional objective was to determine the (energy) electricity demand of the tests, using the Energy Logger 4000 meter.

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