摘要
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.
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.
关键词
动态性
模拟
计算
一次直通蒸汽发电机
热转换
once-through steam generator
dynamic characteristics
simulatin
calculation
