In recent years, the stationary diesel engine market for large diesel units has seen an increasing demand for reliable and fuel efficient power plants in the range of 30-250 MW, based on cost effective refinery residuals.

The demand is met by the modern medium speed diesel GenSets and, for the larger units, by the two-stroke low speed crosshead uniflow scavenged diesel engines, the latter capable of burning almost any fuel available on the market, whether liquid or gaseous.

This paper will deal with the service experience gained from two-stroke low speed diesel engines and their fuel capability as well as describe various installation examples.