Abstract
In this paper is presented an analysis of main and auxiliary steam energy flow streams from steam generators during the increase in steam system load at conventional LNG carrier. During the steam system load increase was presented differences in steam pressure and temperature between main and auxiliary steam flow streams. Energy power of the auxiliary flow stream is higher than energy power of the main flow stream only at the lowest steam system loads after which main flow stream takes over primacy at middle and high steam system loads. Cumulative auxiliary energy flow stream was divided on energy flow streams to each auxiliary device and energy power consumption of each auxiliary device was also investigated throughout number steam system loads. Analysis of steam production from marine steam generators presented in this paper provides insight into the operation dynamics of the entire steam propulsion system.
Highlights
Internal combustion diesel engines in general have a leading role in ship propulsion nowadays [1,2]
Cumulative auxiliary energy flow stream was divided on energy flow streams to each auxiliary device and energy power consumption of each auxiliary device was investigated throughout number steam system loads
Analysis of steam production from marine steam generators presented in this paper provides insight into the operation dynamics of the entire steam propulsion system
Summary
Internal combustion diesel engines in general (mostly slow speed diesel engines) have a leading role in ship propulsion nowadays [1,2]. In this paper were analyzed changes in main and auxiliary energy steam flow streams from steam generators in marine propulsion system of one conventional LNG carrier. A marine steam propulsion system which main and auxiliary energy flows were analyzed in this paper is mounted on conventional LNG carrier. The essential parts of this propulsion system are two mirror-oriented marine steam generators, one propulsion turbine (with two turbine cylinders), two identical turbo-generators for electrical power production and low power steam turbine with one Curtis stage for main feed water pump drive In the analyzed marine steam propulsion system, the auxiliary steam flow stream was used for the operation of five auxiliary devices: splash steam system, dump line, deaerator, desuperheater and steam generators air heaters, Fig. 1.
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