Background for slow steaming A combination of factors have led to the past two years becoming hugely challenging for certain sectors of the global merchant shipping industry. Th ese factors include: Th e downturn in the global economy, resulting in reduced transportation capacity demand Th e substantial global order book for new tonnage, a legacy from the boom years, resulting in record-high de...

Peculiar, low-frequency, radial vibrations have been observed in various turbomachinery using tilt-pad journal bearings. Unlike discrete subsynchronous spikes that often indicate a serious problem, the vibrations are indiscrete and of low frequency and amplitude. The low level shaft indications have raised concern in witness tests of critical machinery, even in cases that comply with American P...

All conventional piston-driven combustion engines emit metal oxide particles. The main sources are the abrasion between piston-ring and cylinder, abrasion in the bearings, catalyst coating, lube-oil additives, and fuel additives for promoting the exhaust-gas after-treatment. Metal oxides, especially from transition metals, are very toxic when they are very fine. These particles have a high BET ...

−Diesel particulate matter (DPM) often contains small amounts of metal as a minor component but this metal may contribute to adverse health effects. Knowledge of the mechanism for particle formation as well as the size preference of the trace metals is critical to understanding the potential for health concerns. To achieve this, the size and the composition of each particle should be optimally ...

In a previous work, we have developed a perflouropolyether (PFPE) lubricant droplet-filled SU-8 composite which promotes bonding between the molecules of SU-8 and PFPE and provides excellent boundary lubrication. The SU-8 + PFPE composite has enhanced the wear durability of SU-8 by more than four orders of magnitude. In this work, the same SU-8 + PFPE composite was used to fabricate a stand-alo...

Over the last several decades, turbine efficiency has improved significantly, resulting in higher operating temperatures that negatively affect lubricating oil circulating through system. Exposure to high results degradation and eventual formation of solid deposits which greatly limit oil’s ability reduce wear cool components. An experimental apparatus was designed built allow for studying bett...

This paper introduces a new model to improve the wind power plant performance by modeling its reactive demand. It develops probabilistic based on prediction interval help better of demands unit which needs be compensated static VAr compensator (SVC). is made possible use non-parametric neural network (NN) using lower and upper bound estimation (LUBE) method. To avoid instability arising due non...