IGCC power plant simulation: Steady state, dynamic and control.
Item
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Title
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IGCC power plant simulation: Steady state, dynamic and control.
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Identifier
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AAI9325091
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identifier
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9325091
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Creator
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Fan, Zhen.
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Contributor
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Advisers: Reuel Shinnar | Irven H. Rinard
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Date
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1993
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Language
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English
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Publisher
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City University of New York.
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Subject
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Engineering, Chemical | Engineering, Industrial
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Abstract
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According to today's know-how, the integrated coal gasification combined cycle (IGCC) technology is capable of meeting the requirements which will be placed on future power generation facilities with respect to low emissions and costs combined with high efficiency and availability. The fluidized bed coal gasification process has been demonstrated at the pilot plant level.;The object of this thesis was to evaluate steady state and dynamic performance, operability, and controllability of a modified IGCC power system. It includes an airblown fluidized bed gasifier, a fluidized bed combustor, and a combined cycle power system.;The primary tool for the work was dynamic simulation. First principles, non-linear models were developed for each of major components in the system. The control system analysis utilized linearized version of the models.;It has been found that for a gasifier there are three response modes whose time constants are related to the solid, gas, and thermal capacitances. The major questions of how rapidly a gasifier can move to a new steady state from any stand-by condition and how the turndown ratio can be enhanced by appropriate integration of the total plant control and design have been answered. An important conclusion is that a low carbon conversion operation in the gasifier is preferred both for high thermal efficiency and for good control performance in IGCC system.;For the combined cycle system itself, a more detailed set of models were required compared to those used in the overall IGCC system studies. Control configurations and controller tunings were determined using the multivariable Biggest Log-Modulus Tuning procedure. The performance of the combined cycle system in the load following mode was evaluated via dynamic simulations by DYSIM. Impacts of plant design and control have been demonstrated. Good control has been obtained by appropriate plant design.;The present IGCC models allow one to simulate real processes before going to the pilot plant or to the commercial level. This has been done for the gasifier at the Foster Wheeler pilot plant for solid mixing, steady state operation, and transient behavior. Good agreements were obtained between experimental data and simulations. For the combined cycle system demonstration at Gilbert Station, NJ, shows that the model represents the system behavior and operational data. The simulation matches the start up data for the literature.
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Type
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dissertation
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Source
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PQT Legacy CUNY.xlsx
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degree
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Ph.D.
