The Research Of Boiler Tube Wall Temperature Calculation And Software Development

With the increase capability and complex structure of boiler, the frequency of tube explosion of heat exchange components in super high temperature circumstance grows dramatically, and becomes one of the most frequently happened accidents. Temperature of tube wall, through iterative calculation of tube wall temperature in the key location of high temperature area of the boiler, is computed to guarantee the safety of boiler components and provide basic data to choose the raw material of these components.Based on the cooperative project between the Institute of Process Equipment and Control Engineering in Zhejiang University and Wuxi HuaGuang Boiler Co., Ltd , "Boiler Engineering Simulation System", this dissertation explores the System of Tube Wall Temperature Calculation. This system used to make sure the boiler's tube wall temperature in safe during the boiler running. The main content of the dissertation is present as follows:Summarized the present integration software explore technology status in China. Analyzed the reasons cause tube wall temperature exceed, which is the flux distribute asymmetry and the thermal distribute asymmetry. Presented the physical model of Tube Wall System, using the methods of experience arithmetic and numerical arithmetic.Using the Object-Oriented technology to analyze the requirement of Engineering Information Graphic Marking System, introducing Unified Modeling Language to describe the system model. According the system functions requirement, decomposing the model to three main modules: "Main Command Package", "Calculation Package", "Calculation results Treatment Package".Analyzing the relationship between the system member data, disintegrating all the data to three types: "Calculation point Class Object", "Calculation methods Class Object", "Parts Object". After that, building the actual aggregation classes to manage these member data, then, providing the concrete algorithm of management behavior of an aggregation class.Used lots of iterative arithmetic to complete tube wall temperature calculation. Used the OLE technology to generate engineering computing results list. Used class CDC of MFC library as a base class to realize results curve plot. At the same time, with the help of software interface technologies, realizing human-computer interactions of the system. Building the integration between the system and the Boiler Engineering Simulation System to complete boiler design assignment together. Each subsystem in this integration System can share the data and function. This system has been used in several boiler factories. With large instances tested, system proved veracity.