The utmost care is taken in the design of the combustion chamber components.
Component temperature levels do not exceed material property related limits while, at the same time, cannot fall below certain temperature levels to avoid cold or sulphuric acid corrosion.
Numerous publications have emphasised the positive effect of elevated liner wall temperatures.
The optimal cylinder liner temperature level, in combination with the Pulse Jet lube oil system and correctly designed lube oil distribution grooves, results in very low liner/piston ring wear. This results in very competitive maintenance intervals and costs.
WinGD has various design possibilities for achieving the necessary temperature levels over a broad load range. These vary from insulating the cooling bores to independent cooling water circuits for the cylinder liners.
The below figure illustrates cylinder liner calibration carried out on several X82 cylinder liners measured with or without cylinder liner cover. The measurements were made by using a special device inserted through the scavenge air ports. Even though high sulphur fuels were burned, >3%Sulphur, the liner wear rates remain very low. A piston underside residual oil analysis confirmed the values at around BN30, thus allowing a further lube oil feed reduction towards 0.6g/kWh in combination with a BN100 lubricant.