SMAT2008E01EQUILIBRIUM RELATIONS LIQUID-VAPOURS FOR THE LIQUEFIEDPETROLEUM GASMihai NAGI, Dan ALEXANDRU, Arina NEGOITESCUAbstract: In this work we present equilibrium relations of liquid-vapours <strong>for</strong> the Liquefied Petroleum Gas;Biphasic systems composed of two mixable liquids. We <strong>de</strong>fine the phase’s equation and we trace the phases chart at aconstant temperatureKeywords: Liquefied Petroleum Gas, equilibrium relations, liquid-vapours, Biphasic systems, mixable liquids.SMAT2008E02ENERGETICALLY OPTIMIZATIONOF INTERNAL COMBUSTION ENGINE RADIATORUSING THE ELECTRO-HYDRODYNAMIC ANALOGYVictor BENCHE, Gabriela HUMINIC, Angel HUMINICAbstract: In this paper are presented some results concerning energetically optimisation of theinternal combustion engines radiators. The approaching is per<strong>for</strong>med from energetically point of view,using electro-hydro-dynamics analogy. In this sense are studied the influences of the thermal load,hydraulic and mechanical power and the efficiency heat exchange. The study is illustrated by means of anumerical exemplification.Keywords: radiator, electro-hydro-dynamics analogy.Victor Benche, Prof. dr. eng., Transilvania University of Brasov, Thermodynamics and FluidMechanics Department,e-mail: gabi.p@unitbv.ro40
SMAT2008E03THE INFLUENCE OF BIODIESEL FUELS ON DIESEL ENGINEBogdan Cornel BENEAAbstract: The use of biodiesel following international energy policies is presently finding resistance fromcar manufacturing companies and, sometimes, from private users. One of the reasons <strong>for</strong> resistance is acertain lack of knowledge about the effect of biodiesel on engine emissions. The first section of the paper is<strong>de</strong>dicated to the effect of biodiesel fuel on engine power, fuel consumption and thermal efficiency. In thesecond section the engine emissions from biodiesel and diesel fuels are compared, paying special attention tothe most concerning emissions: nitric oxi<strong>de</strong>s and particulate matter.Keywords: biodiesel; Diesel fuel, emiisions, power influenceBogdan Cornel BENEA, assistant, Transilvania University Brasov, Department of AutomotiveEngineering, b.benea@unitbv.ro,0268-413000/156BIODIESEL PRODUCTION FROM SUNFLOWERBogdan Cornel BENEASMAT2008E04Abstract: Abstract of 50-120 words (10 pt, italic) Biodiesel is the name of a clean burning alternative fuel,produced from domestic, renewable resources. Biodiesel contains no petroleum, but it can be blen<strong>de</strong>d at any level withpetroleum diesel to create a biodiesel blend. It can be used in compression-ignition (diesel) engines with little or nomodifications. Biodiesel is simple to use, bio<strong>de</strong>gradable, nontoxic, and essentially free of sulfur and aromatics.Biodiesel can be produced from any fat or oil such as sunflower oil, soybean oil, canola oil, palm oil, tallowto name a few through a refinery process called transesterification. It is recommen<strong>de</strong>d that the sunfloweroil be refined and <strong>de</strong>-waxed be<strong>for</strong>e blending it with diesel fuel.Sunflower is a high oil content seed andaverage yields can produce 600 pounds of oil per acre, consi<strong>de</strong>rably more than soybeans. There is a great<strong>de</strong>al of interest from local areas <strong>for</strong> construction of small processing facilities <strong>for</strong> sunflower biodieselproduction. Sunflower oil is priced at a premium to soybean and canola oils due to <strong>de</strong>mand from the foodprocessing industry. The price premium may make it prohibitive to use sunflower oil in biodiesel Keywords:Energy, biomass, fuel, natural resources, ethanol, biodiesel).Bogdan Cornel BENEA, assistant, Transilvania University Brasov, Department of AutomotiveEngineering, b.benea@unitbv.ro,0268-413000/15641