The effect of the rapeseed oil methyl ester (RME) component in diesel fuel was assessed. Dynamic viscosity and density of blends were particularly observed. Measurements were performed at standard constant temperature. Increasing ratio of RME in diesel fuel was reflected in increased density value and dynamic viscosity of the blend. In the case of pure RME, pure diesel fuel, and the blend of both, temperature dependence of dynamic viscosity and density was examined. Considerable temperature dependence of dynamic viscosity and density was found out and demonstrated for all three samples. This finding is in accordance with theoretical assumptions and literature data sources. Mathematical models were developed and tested. Temperature dependence of dynamic viscosity was modelled using the 3rd degree polynomial. Temperature dependence of density was modelled using the 2nd degree polynomial. The proposed models can be used for flow behaviour prediction of RME, diesel fuel, and their blends.
Alptekin E, Canakci M (2008): Determination of the density and the viscosities of biodiesel-diesel fuel blends. Renewable Energy, 33, 2623-2630. doi: 10.1016/j.renene.2008.02.020.
Borges ME, Díaz L, Gavin J, Brito A (2011): Estimation of the content of fatty acid methyl esters (FAME) in biodiesel simplex from dynamic viscosity measurements. Fuel Processing Technology, 92, 597-599. doi: 10.1016/j.fuproc.2010.11.016.
ČSN EN Standard: Automotive fuels - Diesel - Requirements and test methods. Czech Standard Institute, Prague.
Guido C, Beatrice C, Napolitano P (2013): Application of bioethanol/RME/diesel blend in a Euro5 automotive diesel engine: potentiality of closed loop combustion control technology. Applied Energy, 102, 13-23. doi: 10.1016/j. apenergy.2012.08.051.
ISO 8217 Standar: Fuel standard. International Organization for Standardization, Geneva.
Joshi RM, Pegg MJ (2007): Flow properties of biodiesel fuel blends at low temperatures. Fuel, 86, 143-251. doi: 10.1016/j.fuel.2006.06.005.
Knothe G, Steidley KR (2007): Kinematic viscosity of biodiesel components (fatty acid alkyl esters) and related compounds at low temperatures. Fuel, 86, 2560-2567. doi: 10.1016/j.fuel.2007.02.006.
Králová T (2007): Bio bio bio-diesel. Euro, 49, 58-59. (in Czech)
Kumbár V, Polcar A (2012): Flow behaviour of petrol, bio-ethanol and their blends. Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis, 60, 211-216. doi: 10.11118/actaun201260060211.
Kumbár V, Sabaliauskas A (2013): Low-temperature behaviour of the engine oil. Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis, 61, 1763-1767. doi: 10.11118/actaun201361061763.
Labecki L, Lindner A, Winklmayr W, Uitz R, Cracknell R, Ganippa L (2013): Effects of injection parameters and EGR on exhaust soot particle number-size distribution for diesel and RME fuels in HSDI engines. Fuel, 112, 224-235. doi: 10.1016/j.fuel.2013.05.013.
Maggi CP (2006): Advantages of kinematic viscosity measurement in used oil analysis. Practicing Oil Analysis Magazine, 5, 38-52.
Millo F, Ferraro C, Vezza D, Vlachos T (2011): Analysis of performance and emissions of an automotive Euro 5 diesel engine fuelled with B30 from RME and JME. SAE International Journal of Fuels and Lubricants, 4, 1, 9-22.
Ramírez-Verduzco LF (2011): Prediction of the density and viscosity in biodiesel blends at various temperatures. Fuel, 90, 1751-1761. doi: 10.1016/j.fuel.2010.12.032.
Tira HS, Herreros JM, Tsolakis A, Wyszynski ML (2014): Influence of the addition of LPG-reformate and H2 on an engine dually fuelled with LPG-diesel, -RME and -GTL fuels. Fuel, 118, 73-82. doi: 10.1016/j.fuel.2013.10.065.
Tsolakis A, Megaritis A, Wyszynski ML, Theinnoi K (2007): Engine performance and emissions of a diesel engine operating on diesel-RME (rapeseed methyl ester) blends with EGR (exhaust gas recirculation). Energy, 32, 2072-2080. doi: 10.3846/16484142.2011.561528.
Vlk F (2004): Alternative propulsion of motor vehicles. Prof. Ing. František Vlk, DrSc. Publishing House, Brno. (in Czech)
Vlk F (2006): Fuels and lubricants for motor vehicles. Prof. Ing. František Vlk, DrSc. Publishing House, Brno. (in Czech)
Yuan W, Hansen AC, Zhang Q (2009): Predicting the temperature dependent viscosity of biodiesel fuels. Fuel, 88, 1120-1126. doi: 10.1016/j.fuel.2008.11.011.