Link to document:
Status
Electronic Resource
Call number
Publication
DOE ET 20517 6; Report; August 1984.
Language
Library's review
ABSTRACT:
A simplified linear dynamic thermal hydraulic model of a once-through steam generator is presented, The model is a first-order transfer function with pure transport delay and with explicit analytical expressions for the model parameters, The intended use for the model is the initial design
A simplified linear dynamic thermal hydraulic model of a once-through steam generator is presented, The model is a first-order transfer function with pure transport delay and with explicit analytical expressions for the model parameters, The intended use for the model is the initial design
Show More
of an outlet steam temperature controller using inlet flow rate valve adjustment, where final controller gains can then be determined through a tuning process of detailed simulation, test, and operation, Model validation is accomplished by several approaches. First, a numerically derived higher order linear model frequency response is obtained from a nonlinear mathematical dynamic description based on established first principles techniques, The frequency response of this higher order linear model is shown to compare favorably to that of the simplified model, thereby providing analytical credence to the simplified model. Next, the frequency response of the simplified model is validated by direct comparison with frequency response test results obtained at the Department of Energy/Sandia Laboratories Central Receiver Test Facility. Finally, a description is given of a simplified model frequency response validation based on step response test results. The modeling and validation techniques should be applicable to similar initial controller design of other once-through boilers and to other similar processes, Show Less