REDUCED FUEL CONSUMPTION AND INCREASED LOADABILITY OF THE NEW UNI-FLOW-SCAVENGED B&W TWO-STROKE ENGINES WITH CONSTANT PRESSURE TURBOCHARGING

The paper describes the further development of the K- and L-GF uniflow-scavenged low-speed B & W engines following the introduction of constant pressure turbocharging in 1978. An investigation of the behaviour of combustion chamber components in both impulse--and constant-pressure turbocharging has demonstrated that the latter process gives more favourable power and consumption figures for K- and L-GFC engines. The test results are presented and discussed and the basis for the revised engine data is explained. It is considered that insight into the nature of the various load limitations is a pre-requisite for a more flexible lay-out, to guarantee optimum economic operation of direct-coupled installations in changing trade conditions.