Powerplant lubricant selection for improved efficiency and environmental impact reduction
2010 (English)In: Proceedings of the ASME 2010 International Mechanical Engineering Congress & Exposition, IMECE 2010, 2010Conference paper (Other academic)
Computational models were used to optimize bearing per-formance by adjusting a number of lubricant properties. Thiscomputational optimization showed that the most beneficialcharacteristics to hydrodynamic bearing operation were highviscosity index (VI) and high specific heat capacity. Four envi-ronmentally adapted synthetic lubricants were developed to pro-vide these characteristics including: ISO VG32 with 259 VI, ISOVG22 with 245 VI, ISO VG22 with 336 VI, and ISO VG15 with226 VI. A full scale bearing test machine was then operated withthese lubricants in addition to mineral based turbine oils, ISOVG68 with 103 VI and ISO VG32 with 105 VI, to determine theeffect on bearing performance and to validate the models. Thenew lubricants reduced bearing power loss by up to 20% and sig-nificantly reduced bearing temperatures with somewhat reducedfilm thickness. The machine was then operated to provide equiv-alent minimum viscosity with the new lubricants by varying inlettemperature, finding that changes in power loss were less sub-stantial with equivalent minimum viscosity.Comparison of simulated and experimental results led todevelopment of a simple, practical method to estimate benefitsand operational parameters for lubricants based on viscositygrade, viscosity index and a simplified description of the machine’s bearings. Other, less tangible, factors considered arebio-degradeability and impact of power loss reduction.
Place, publisher, year, edition, pages
IdentifiersURN: urn:nbn:se:kth:diva-80101OAI: oai:DiVA.org:kth-80101DiVA: diva2:496005
ASME International Mechanical Engineering Congress & Exposition. Vancouver, British Columbia, Canada. November 12-18, 2010
QC 201204242012-02-092012-02-092012-04-24Bibliographically approved