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Modeling and Dynamic Simulation for the Marine Supercharged Boiler Steam-Water System

Author: CaoZhanWei
Tutor: JiangRenQiu
School: Harbin Engineering University
Course: Engineering Thermophysics
Keywords: Supercharged boiler Steam-water system Mathematical Modeling Dynamic characteristic Simulation
CLC: U664.111
Type: Master's thesis
Year: 2007
Downloads: 246
Quote: 5
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Abstract


At present , domestic supercharged boiler simulation research is still in its infancy . The supercharged boiler structure is complex , dynamic mathematical model has the characteristics of nonlinear , multi-parameter coupling . Plays a key role in the development of marine steam power plant simulation system the supercharged boiler simulation study to master the entire unit dynamic characteristics . The main work of this paper is to establish a dynamic mathematical model suitable for marine supercharged boiler steam-water system and different disturbance conditions for dynamic simulation study . In order to get the simulation model suitable for a certain type of marine supercharged boiler steam-water system , starting from the basic laws of physics to study the kinetic characteristics of the the soda system single-phase region and the two-phase region . Respectively, to establish a single-phase distribution parameter kinetic model and the lumped parameter kinetic model and the two-phase region set parameter kinetic model and the distribution parameters lumped parameter kinetic model . For marine supercharged boiler single-phase region on the basis of analysis of the advantages and disadvantages of comparison of the two methods , the characteristics of two-phase evaporation zone , marine supercharged boiler single-phase heat pipe ( superheater , economic , ) lumped parameterized the modeling approach , the two-phase evaporation simplify the distribution of several links ( Drum water wall , etc. ) parameters lumped parameter modeling method . The dynamic mathematical model based on the fourth-order Runge - Kutta method of differential equations discretized using C language simulation program code . Disturbance using the simulation model , this article on the supercharged boiler load changes , water supply change drum pressure , an important indicator of the water level , the superheated steam temperature dynamic simulation . The experimental results in line with the basic law of the soda system , process mechanism , to reflect the different disturbance cases of soda system dynamic response trends prove this to establish the reasonableness and correctness of the model . In addition , based on the content of the research paper on the thermophysical properties of the working fluid calculation and visualization modeling research to further improve the work will be in the future .

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CLC: > Transportation > Waterway transport > Marine Engineering > Ship machinery > Ship power plant > Steam power plant > Steam boiler
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