| This is a sub-project of Project #973 which plan to simulate a whole power plant system with software language MATLAB. MATLAB is a modeling language with great readability, inheritability and compatibility. Basing on blocking principle of MATLAB, we divide the whole system to several parts: boiler, steam turbine, heat exchanger (including condenser) , generator and so on, then develop every part one by one, at last connect all the parts when they are approved correct independently. In this paper, we do the condenser part; we develop a surface condenser model and do some interrelated research. Basing on fundamentals of heat transfer and thermodynamics, we develop a dynamic mathematical relationship of single pressure condenser and also multi-pressure condenser, and then we use MATLAB/SIMULINK to actualize the mathematical relationship, which is the finished object model.To validate the condenser model, we choose 600MW supercritical turbine generator unit as our case, errors are all within 2% when simulating several typical running states. That means we can do the research during it.Then we analyses the condenser performance and economic benefit when tube material is copper, stainless steel or titanium. Since they have different heat conductance, causticity-resistance and cost, they fit for different cooling-water quality. This paper brings forward some relative suggestion on tube material choosing.At last we discuss the condenser optimization between single pressure and multi-pressure, we find double-pressure is the most economic, on the practical engineering three-pressure or more are not really recommended; for single-pressure condenser, double flows cooling-water is proved more economic then single flow cooling-water. Then we give out some suggestions to condenser optimization and propose some problems which needs been resolved in near future. |
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