Dynamic Simulation Of The Waste Heat Boiler In The Combined Cycle

The gas-steam combined cycle device has got day-by-day far-reaching application because of its efficiency. The heat recovery steam generator is one important member in the combined cycle system, is a key for system whole optimization and each-subsystem accordance, thus become a study focus at the present time. With continuous study, peoples have not only a lot of study for optimization of steam-water system and off-design calculation, but also begin to study dynamic performance of heat recovery steam generator.The paper gets dynamic mathematical models of each major part of the heat recovery steam generator according to thermo-technique theory and steady and dynamic job procedure, and analyzes further an integral dynamic performance.By dual-pressure heat recovery steam generator for example, this paper analyzes regularity of variations of exit parameters such as drum pressure, superheat steam pressure, steam flow, drum water level, superheat steam temperature and exhausting temperature of heat recovery steam generator with time varying for step changes in the gas turbine exhausting flow, exhausting temperature, high pressure step and low pressure step feed-water flow and feed-water temperature.The results would be instructive to design of structure and control system of heat recovery steam generator by numerical simulation study of heat recovery steam generator.