The Development Of Calculation Platform For GSCC Based On Object-Oriented Technology

Along with our country economy development is entering a new normal, the energy consumption will be gradually reformed. To that end, the country has issued some relevant policies, including the prevention of air pollution and the transformation and upgrading of power plant energy conservation and emissions reduction, which puts forward higher requirements for power plant investment, energy conservation and emissions reduction, but also creates new opportunities for the development of high efficiency, environmental protection industry. Gas-steam combined cycle (GSCC) power generation with its high efficiency and low carbon, low pollution, low investment, short construction period and other advantages, has been vigorously promoting the application.The thermal Performance of combined cycle unit directly affects the whole efficiency and economy of plants; at the same time, the thermal performance calculation is essential for power plant design and construction and is also the important basis of Equipment selection and optimization. As a very promising power generation technology, the complexity of the GSCC process design, calculation and checking, some of the traditional plant thermal performance calculation software are not often targeted or poor universality. With the development of a computer technology and simulation, the graphical, human, extensible design calculation software is badly needed.This article is based on the cooperation project, named "the development of gas-steam combined cycle unit performance computing platform based on a heavy duty gas turbine ".Referring to domestic and foreign research results and related software development, the software is based on the theory of the first law of thermodynamics, the idea of object-oriented programming, unified modeling language (UML) and mixed programming technology. The human, graphical thermal performance computing platform is developed. At present, the project has been accomplished and gets the user’s high praise. This thesis mainly completes the following contents:1. The GSCC working principle, system structure and the thermal performance calculation methods are in-depth analyzed; drawing lessons from the existing operation of gas turbine power plant, different types of combined cycle system reasonably are simplified into five kinds of process structures, and with the idea of temperature ranges, mathematical models are established, and every performance parameter is calculated; taking the simulation datum of commercial software GateCycle for example, the calculation results are verified and error is controlled within engineering accuracy.2. Combined with the project requirements and the engineering practice, using Fortran compiler thermal performance calculation modules, and with the aid of mixed programming technology, realizing the docking with C# interfaces and completing the whole software compilation. On the one hand, giving full play to the two languages in scientific computing and the advantages of interface development; on the other hand, these independent calculation modules are linked through DLL; you can easily change and add or delete, to improve the project development progress and extensibility of the software.3. By the object-oriented ideas, design patterns, unified modeling language(UML)and other advanced software development technology for system design, using object-oriented to organize the overall architectures of the software and deriving calculation classes, flow forms, performance curves drawing and processing parameters and other related classes by the class inheritance. Good design patterns and UML make software easy to be extended, more flexible, higher reusability.