自然循环余热锅炉动态仿真研究马文通.pdf

19 17 © Vol. 19 No. 17 2007 9 Journal of System Simulation Sep., 2007 1 2 1. 200030 2. 110015 TK22992 A 1004-731X (2007) 17-4055-06 Dynamic Simulation of Natural Circulation HRSG 1 2 MA Wen-tong , WANG Yue-ren (1.Key Laboratory for Machinery and Power Engineering of Ministry of Education, Shanghai Jiao Tong University, Shanghai 200030, China; 2. School of Municipal and Environmental Engineering, Shenyang Architectural University, Liaoning 110015, China) Abstract: A natural circulation HRSG dynamic model is was developed, which was important in studying the dynamic behaviors of HRSG. With introducing the technique of combining the drag model and volume model, more reasonable model divide method was proposed. Thus the models were easier to connect. Based on the mechanism of HRSG, the working medium under the water-level of the drum was lumped as a lumped system with dynamic dryness. Subsequently, the complex of drum model was alleviated. Dynamic responses of HRSG were numerically simulated when gas turbine and steam turbine were under off-design condition. Theoretical analyses show that the simulation results are reasonable and the model can satisfy dynamic simulation for large load change. It is believed that the result in this work is valuable in proposing a reference for similar research. Key words: heat recovery steam generators (HRSG); natural circulation; off