Abstract
In recent years, energy saving of the propulsion plant is progressing as environmental transformation which surround a LNG carrier. In addition to the conventional steam propulsion system, the medium-speed diesel engine in which the gas combustion which is superior in plant efficiency is possible is increasing. So, in our company, the reheat furnace which arranged the reheat burner was formed in the exhaust gas exit of the main boiler (with no reheat) of a conventional type as a boiler of a reheat system, and the structure which overheats reheat steam was developed by making a main boiler exhaust gas warm. Thereby, while forming steam temperature into high temperature and high pressure, it contributed to 15% of improvement in efficiency to the conventional steam propulsion plant by adopting a reheat cycle. At the running test in the real ocean space, these measures were able to prove the target performance of steam temperature.
