628 KB29 KB199920252013Komar, IvanRoldo, LianeVulić, Nenadštevilka:1letnik:59str. 25-31, SI 5ISSN:0039-2480COBISSID:13068315URN:URN:NBN:SI:doc-CIYBHVGAenAssociation of Mechanical Engineers and Technicians of Slovenia et al.Zveza strojnih inženirjev in tehnikov Slovenije et al.Strojniški vestnikbabbitt metalBabbittova kovinaizbira materialovjournal bearingladijski pogonski sistemiosni ležajipolimeripolymersprogramske aplikacijeselection of materialsship propulsion systemssoftware applicationsDesign and materials selection for environmentally friendly ship propulsion system|The selection of the material regarding specific design of the stern tube journal bearings in vessels is critical taking into account the lubrication system, whether oil or water based, and the consequent lubricant leakage. Therefore, the present study examines the feasibility and the advantages of implementing water lubricated polymer shaft bearings instead of conventional white metal bearings lubricated by oil. The investigation method is related to the numerical model and the software application based on finite difference method and isoviscous model. Results, based upon data collected from three different types of actual vessels in service, have shown that power loss in polymer bearings is at least 6 times less than in conventional white metal ones indicating that polymer journal bearings are significantly more energy efficient and environmentally friendlyTEXTznanstveno časopisjejournalsSlovenian National E-content AggregatorNational and University Library of SloveniaUniverza v Ljubljani, Fakulteta za strojništvo