Simulation analysis of static and dynamic characteristics of once-through steam generator in concentric annuli tube

1 Introduction1 Steam generator is an important equipment of an integrated pressurized water reactor. In recent design, the once-through steam generator (OTSG) is mostly applied because it delivers superheated steam and requires no separators. Moreover, i…

Simulation analysis of static and dynamic characteristics of once-through steam generator in concentric annuli tube

The once-through steam generator (OTSG) in concentric annuli tube is a new type of steam generator which applies double side to transfer heat. The heat flux between the water of centric tube, outside annuli tube and that of annulus channel is assumed to be equal, and then the steam generator’s model is built by lumped parameters with moving boundary. In the basis of the built model, static and dynamic characteristics are analyzed. The static characteristics are proved by experiment results in a 19-tube once-through steam generator of Babcock & Wilcox. The characteristics that the lengths of three regions (subcooled region, nucleate boiling region, superheat region) change with power can be explained by theory analysis. The dynamic characteristics accord with the heat and hydraulics and the results of analysis according to the mechanism. ZHANG Wei, born in 1978, received M.S. dergree from Harbin Engineering University in 2004. He is currently working toward Ph.D degree in control theory and control engineering in Harbin Engineering University. His research focuses on the control of nuclear. BIAN Xing-qian, born in 1941, received B.S. degree from Harbin Military Engineering Institute in 1965. His research interests are in control strategy of autonomous underwater vehicle (AUV). XIA Guo-qing is a professor and supervisor for Ph.D. student in Dynamic and Nuclear Engineering college, Harbin Engineering University. His research interests include the control strategy of autonomous underwater vehicle (AUV) and nuclear dynamic equipment.