Abstract
In order to realize the energy-reused, the compound cycle is used in exhaust heat-reused plant on board ship based on the performance analysis of compound cycle and ammonia-water composite. The Kalina cycle, in which ammonia-water composite is used as the working fluid, is being researched for using in the electrical power plant on board ship in future. It is very important to fmd out the relationships between the properties and the concentration of ammonia-water composite. In this research, the properties of ammonia-water composite are obtained by using the general-purpose computer program “PROPATH” when the concentration is varied from 0 to 90%.
According to the calculated result, the condensing pressure is decreased if a separator is used in the condensing system. At the same time, the exergy efficiency of the steam turbine is raised, especially, when ammonia concentration is more than 30%. If the high-pressure and high-concentration ammonia is sent to turbine directly from separator, the exergy efficiency of the turbine could be increased up to 15%.
