Modeling a high output marine steam generator feedwater control system which uses parallel turbine-driven feed pumps |
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Authors: | Zhi-qiang Qiu Hai Zou Jian-hua Sun |
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Institution: | (1) Department of Control Science and Engineering, Huazhong University of Science & Technology, Wuhan, 430074, China;(2) Wuhan Second Ship Design & Research Institute, Wuhan, 430064, China |
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Abstract: | Parallel turbine-driven feedwater pumps are needed when ships travel at high speed. In order to study marine steam generator feedwater control systems which use parallel turbine-driven feed pumps,a mathematical model of marine steam generator feedwater control system was developed which includes mathematical models of two steam generators and parallel turbine-driven feed pumps as well as mathematical models of feedwater pipes and feed regulating valves. The operating condition points of the parallel turbine-driven feed pumps were calculated by the Chebyshev curve fit method. A water level controller for the steam generator and a rotary speed controller for the turbine-driven feed pumps were also included in the model. The accuracy of the mathematical models and their controllers was verified by comparing their results with those from a simulator. |
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Keywords: | feedwater control steam generator modeling feed pump turbine |
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