Abstract
The energy-saving design of the propulsion plant is very important for the improvement of ship's overall performance. IHI developed a diesel engine and steam turbine combined propulsion plant, the Super Economical Shaft Generator system (SSG system), and delivered in April 1981 a ship equipped with the first SSG system having many energy-saving features. Following this, IHI developed the SSG Mark-II system, an improved version of its precedent. The ship mounted with the first SSG Mark-II system put into service satisfactorily. The SSG Mark-II system ingeniously recovers low-temperature waste heat which has been so far lost, increasing the waste heat recovery rate by 30% to 40% compared with the conventional system. As a result, the recovered turbine output from the waste heat reached about 10% of main engine output at NOR.
