A mathematical model is set up for calculating the water swell in a supercritical pressure once through boiler during its start up.
本文建立了超临界直流锅炉启动过程汽水膨胀的计算模型，并用试验进行了验证。
The dynamic characters and control system for 600 MW supercritical pressure once-through boiler equipped with internal start-up control are relatively complicated.
采用内置式启动控制的600 MW超临界压力螺旋管圈型直流锅炉，其作为被控对象的动态特性及控制系统都较复杂。
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