Method for controlling start-up and steady state performance of a closed split flow recompression brayton cycle

DWPI Title: Method for controlling start-up and steady state performance of power conversion system, involves identifying and producing start-up and steady state operating conditions set points that are used to start-up and operate power system
Abstract: A method of resolving a balanced condition that generates control parameters for start-up and steady state operating points and various component and cycle performances for a closed split flow recompression cycle system. The method provides for improved control of a Brayton cycle thermal to electrical power conversion system. The method may also be used for system design, operational simulation and/or parameter prediction.
Use: Method for controlling start-up and steady state performance of a closed split flow recompression brayton cycle power generation system i.e. power conversion system, and for predicting the closed split flow recompression brayton cycle power generation system operating at high temperature utilizing ultra-critical carbondioxide.
Advantage: The method enables determining start-up and operating parameters set by a system operator that allow for stability during start-up and steady state operation. The method enables determining appropriate changes to the operating conditions of a power conversion cycle based on comparison of actual and potential power conversion efficiencies such that to maximize efficiency of the system. The method enables facilitating the stable start-up and operating conditions that maximizes power generated at turbines, while minimizing power consumed by compressors and losses. The method enables providing useful, robust, and stable methodology that quickly generates predictions for steady state operating points given user inputs and initial estimates, and that lends to modification and distribution in an easy manner. The method enables predicting and optimizing split flow recompression brayton cycle balanced operating steady state set of conditions using specified component performance characterizations.
Novelty: The method involves calculating high temperature and low temperature recuperator conditions. An outlet temperature of an exit of a low temperature recuperator (108) calculated by a thermodynamic and mass flow model is compared to the outlet temperature of a low pressure side of the recuperator, if values are not equal inputting an estimate of the temperature at the exit of the recuperator. Start-up and steady state operating conditions set points are identified and produced that are used to start-up and operate a closed split flow recompression brayton cycle power generation system.
Filed: 5/1/2014
Application Number: US14267137A
Tech ID: SD 12486.1
This invention was made with Government support under Contract No. DE-NA0003525 awarded by the United States Department of Energy/National Nuclear Security Administration. The Government has certain rights in the invention.
Data from Derwent World Patents Index, provided by Clarivate
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