Download or read book Investigation of Plant Control Strategies for the Supercritical C02Brayton Cycle for a Sodium cooled Fast Reactor Using the Plant Dynamics Code written by and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The development of a control strategy for the supercritical CO2 (S-CO2) Brayton cycle has been extended to the investigation of alternate control strategies for a Sodium-Cooled Fast Reactor (SFR) nuclear power plant incorporating a S-CO2 Brayton cycle power converter. The SFR assumed is the 400 MWe (1000 MWt) ABR-1000 preconceptual design incorporating metallic fuel. Three alternative idealized schemes for controlling the reactor side of the plant in combination with the existing automatic control strategy for the S-CO2 Brayton cycle are explored using the ANL Plant Dynamics Code together with the SAS4A/SASSYS-1 Liquid Metal Reactor (LMR) Analysis Code System coupled together using the iterative coupling formulation previously developed and implemented into the Plant Dynamics Code. The first option assumes that the reactor side can be ideally controlled through movement of control rods and changing the speeds of both the primary and intermediate coolant system sodium pumps such that the intermediate sodium flow rate and inlet temperature to the sodium-to-CO2 heat exchanger (RHX) remain unvarying while the intermediate sodium outlet temperature changes as the load demand from the electric grid changes and the S-CO2 cycle conditions adjust according to the S-CO2 cycle control strategy. For this option, the reactor plant follows an assumed change in load demand from 100 to 0 % nominal at 5 % reduction per minute in a suitable fashion. The second option allows the reactor core power and primary and intermediate coolant system sodium pump flow rates to change autonomously in response to the strong reactivity feedbacks of the metallic fueled core and assumed constant pump torques representing unchanging output from the pump electric motors. The plant behavior to the assumed load demand reduction is surprising close to that calculated for the first option. The only negative result observed is a slight increase in the intermediate inlet sodium temperatures by about 10 C. This temperature rise could presumably be precluded or significantly reduced through fine adjustment of the control rods and pump motors. The third option assumes that the reactor core power and primary and intermediate system flow rates are ideally reduced linearly in a programmed fashion that instantaneously matches the prescribed load demand. The calculated behavior of this idealized case reveals a number of difficulties because the control strategy for the S-CO2 cycle overcools the reactor potentially resulting in the calculation of sodium bulk freezing and the onset of sodium boiling. The results show that autonomous SFR operation may be viable for the particular assumed load change transient and deserves further investigation for other transients and postulated accidents.
Download or read book Control Strategies for Supercritical Carbon Dioxide Power Conversion Systems written by Nathan Carstens and published by . This book was released on 2007 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt: Coding innovations have made faster than real time simulation possible (on today's off the shelf hardware), which makes plant simulator and control applications feasible. This code was used to devise and investigate some of the major control strategies required to operate the cycle: high and low temperature control, three variations of turbine bypass, and inventory control. Using these strategies various transients were investigated including part-load operation, loss-of-load, loss of heat sink, over-power, and startup/shutdown.
Download or read book Plantwide Control written by Gade Pandu Rangaiah and published by John Wiley & Sons. This book was released on 2012-04-02 with total page 497 pages. Available in PDF, EPUB and Kindle. Book excerpt: The use of control systems is necessary for safe and optimal operation of industrial processes in the presence of inevitable disturbances and uncertainties. Plant-wide control (PWC) involves the systems and strategies required to control an entire chemical plant consisting of many interacting unit operations. Over the past 30 years, many tools and methodologies have been developed to accommodate increasingly larger and more complex plants. This book provides a state-of-the-art of techniques for the design and evaluation of PWC systems. Various applications taken from chemical, petrochemical, biofuels and mineral processing industries are used to illustrate the use of these approaches. This book contains 20 chapters organized in the following sections: Overview and Industrial Perspective Tools and Heuristics Methodologies Applications Emerging Topics With contributions from the leading researchers and industrial practitioners on PWC design, this book is key reading for researchers, postgraduate students, and process control engineers interested in PWC.
Download or read book Supercritical CO2Brayton Cycle Control Strategy for Autonomous Liquid Metal Cooled Reactors written by J. J. Sienicki and published by . This book was released on 2004 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: This presentation discusses a supercritical carbon dioxide brayton cycle control strategy for autonomous liquid metal-cooled reactors.
Download or read book Dynamic Real time Optimization and Control of an Integrated Plant written by Thidarat Tosukhowong and published by . This book was released on 2006 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt: An important issue of the suggested method is in obtaining a suitable dynamic model for optimization. When dynamic first-principles models are available, model reduction techniques that reduce model order, while retaining slow-scale information in the frequency range of interest by the optimizer can be used. On the other hand, when fundamental constitutive equations are not available, system identification experiment needs to be performed to obtain information on the interaction dynamics of the system. The difficulties in this process are how to design input signals to excite this ill-conditioned system properly and how to handle the lack of slow-scale dynamic data when plant experiments cannot be conducted for a very long period of time compared to the plant's settling time. This work addresses the experimental design and suggests a new grey-box modeling method to incorporate steady-state information to improve model prediction quality.
Download or read book The Ciris written by Elisabeth Ethel Sinclair and published by . This book was released on 1904 with total page 722 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Developments in Heat Transfer written by Warren M. Rohsenow and published by MIT Press (MA). This book was released on 1964 with total page 554 pages. Available in PDF, EPUB and Kindle. Book excerpt:
