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1.
Determining the speed of sound, density and bulk modulus of rapeseed oil, biodiesel and diesel fuel
Boban Nikolić, Breda Kegl, Saša Marković, Melanija Mitrović, 2012, izvirni znanstveni članek

Opis: Modern tendencies in the development of diesel engines include the operation of the system for injecting diesel fuel at pressures higher than 100 MPa. Knowing the characteristics of liquid fuels such as speed of sound, bulk modulus and density depending on pressure, is important for predicting the behavior of fuel injection systems for diesel engines and optimization of the same. The paper presents an original method and apparatus (device) for determining the speed of sound and density of fluids depending on the pressures. With this method, values of these characteristics for rapeseed oil, biodiesel and conventional diesel fuel at pressures up to 160 MPa are determined. The method is non-destructive, it can also be applied to higher pressures than 160 MPa, as well as other liquid fluids that are used at high pressure - hydraulic oil, for example.
Ključne besede: biodiesel, rapeseed oil, speed of sound, bulk modulus, density, high pressure
Objavljeno v DKUM: 07.07.2017; Ogledov: 1199; Prenosov: 353
.pdf Celotno besedilo (405,37 KB)
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2.
High bulk modulus of ionic liquid and effects on performance of hydraulic system
Milan Kambič, Roland Kalb, Tadej Tašner, Darko Lovrec, 2014, izvirni znanstveni članek

Opis: Over recent years ionic liquids have gained in importance, causing a growing number of scientists and engineers to investigate possible applications for these liquids because of their unique physical and chemical properties. Their outstanding advantages such as nonflammable liquid within a broad liquid range, high thermal, mechanical, and chemical stabilities, low solubility for gases, attractive tribological properties (lubrication), and very low compressibility, and so forth, make them more interesting for applications in mechanical engineering, offering great potential for new innovative processes, and also as a novel hydraulic fluid. This paper focuses on the outstanding compressibility properties of ionic liquid EMIM-EtSO4, a very important physical chemically property when IL is used as a hydraulic fluid. This very low compressibility (respectively, very high Bulk modulus), compared to the classical hydraulic mineral oils or the non-flammable HFDU type of hydraulic fluids, opens up new possibilities regarding its usage within hydraulic systems with increased dynamics, respectively, systemsʼ dynamic responses.
Ključne besede: ionic liquids, hydraulic system, high bulk modulus
Objavljeno v DKUM: 15.06.2017; Ogledov: 1397; Prenosov: 384
.pdf Celotno besedilo (1,91 MB)
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