Dynamic Simulation Analysis In Marine Turbo-charging Set Of Supercharged Boiler

Turbo-charging set is important equipment which ensures marine supercharged boiler working under normal condition, it has a very important significance to marine supercharged boiler. Studying on the supercharged boiler which designed by the former Soviet Union, operating principle and construct characteristics of supercharged boiler were introduced; flue gas's enthalpy-entropy value of the whole working process in supercharged boiler were analyzed; the relationship of power equilibrium at different power balance points of turbo-charging set were analyzed.Steady state model of marine supercharged boiler was established with module structure. Based on the characteristic curves of air-compressor and turbo machine, general modules were built. The simulation computation about six different steady states of supercharged boiler was done by using Matlab/ Simulink, Results shows: power balance point was equal to n = 5500r/min, on the right of the balance point, power would be sufficient always. When on the left of the balance point, power would be insufficient always.On the basis of steady state simulation results, a nonlinear dynamic simulation model of supercharged boiler was built. According to small deviation linear method, small disturbance process dynamic simulation based on 50% and 100% conditions of supercharged boiler was carried on by using Matlab/ Simulink. Results shows: when oil changed, air supply had a certain hysteretic, efficiency of supercharged boiler would be reduced. The results had certain reference significance to the further research on dynamic characteristic of supercharged boiler.Through researching on supercharged boiler, outlet parameters regularity of compressor and inlet parameters regularity of turbo machine were obtained, which will have a certain effect on design and analysis of supercharged boiler system.