Development of a bypass control strategy for supercritical CO2 Brayton cycle cooled reactor system under load-following operation

2021 ◽  
Vol 151 ◽  
pp. 107917
Author(s):  
Chuntian Gao ◽  
Pan Wu ◽  
Weihua Liu ◽  
Yunduo Ma ◽  
Jianqiang Shan
Keyword(s):  
Control Strategy ◽  
Supercritical Co2 ◽  
Reactor System ◽  
Brayton Cycle ◽  
Load Following

Startup, shutdown, and load-following simulations of a 10 MWe supercritical CO2 recompression closed Brayton cycle

2020 ◽  
Vol 277 ◽  
pp. 115628 ◽  
Author(s):  
Eric Liese ◽  
Jacob Albright ◽  
Stephen A. Zitney
Keyword(s):  
Supercritical Co2 ◽  
Brayton Cycle ◽  
Load Following

scholarly journals Review of dynamic performance and control strategy of supercritical CO2 Brayton cycle

Energy and AI ◽  
2021 ◽  
pp. 100078
Author(s):  
Xuan Wang ◽  
Rui Wang ◽  
Xingyan Bian ◽  
Jinwen Cai ◽  
Hua Tian ◽  
...  
Keyword(s):  
Control Strategy ◽  
Supercritical Co2 ◽  
Dynamic Performance ◽  
Brayton Cycle ◽  
And Control

Dynamic modeling and validation of the 5 MW small modular supercritical CO2 Brayton-Cycle reactor system

2022 ◽  
Vol 253 ◽  
pp. 115184
Author(s):  
Yang Ming ◽  
Kai Liu ◽  
Fulong Zhao ◽  
Huawei Fang ◽  
Sichao Tan ◽  
...  
Keyword(s):  
Dynamic Modeling ◽  
Supercritical Co2 ◽  
Reactor System ◽  
Brayton Cycle

Numerical investigation on the performance of impeller back seal configuration in a supercritical CO2 radial-inflow turbine

2021 ◽  
pp. 095440622110095
Author(s):  
Qiuwan Du ◽  
Yuqi Wang ◽  
Di Zhang ◽  
Yonghui Xie
Keyword(s):  
Numerical Investigation ◽  
Supercritical Co2 ◽  
Labyrinth Seal ◽  
Brayton Cycle ◽  
Mechanical Seal ◽  
Nozzle Outlet ◽  
Excellent Performance ◽  
Core Component ◽  
Comprehensive Performance ◽  
Radial Inflow Turbine

Radial-inflow turbine is a core component in supercritical CO2 (SCO2) Brayton cycle. The leakage from the nozzle outlet towards the impeller back brings a great challenge to the efficiency and security of the power system. In this paper, the labyrinth seal (LS) and dry gas seal (DGS) are arranged on the impeller back of a SCO2 radial-inflow turbine and the influence on the comprehensive performance is investigated. Results demonstrate that both LS and DGS configurations can significantly reduce leakage of the impeller back and DGS configuration performs better. Compared with the configuration without leakage, the power and efficiency of DGS configuration are only reduced by 0.27% and 0.35% respectively. The seal clearance and the inlet width have a greater effect on LS configuration. The thermo-mechanical seal deformation values of DGS configurations are all less than 8 μm, which verifies the feasibility. Finally, a novel combined seal configuration with both LS and DGS is proposed and excellent performance is achieved, providing a potential approach for the sealing problem of SCO2 radial-inflow turbine.

Optimization of Supercritical CO2 Brayton Cycle for Simple Cycle Gas Turbines Exhaust Heat Recovery Using Genetic Algorithm

2017 ◽  
Author(s):  
Akshay Khadse ◽  
Lauren Blanchette ◽  
Jayanta Kapat ◽  
Subith Vasu ◽  
Kareem Ahmed
Keyword(s):  
Genetic Algorithm ◽  
Mass Flow Rate ◽  
Flow Rate ◽  
Supercritical Co2 ◽  
Heat Recovery ◽  
Waste Heat Recovery ◽  
Waste Heat ◽  
Brayton Cycle ◽  
Exhaust Heat ◽  
Exhaust Heat Recovery

For the application of waste heat recovery (WHR), supercritical CO2 (S-CO2) Brayton power cycles offer significant suitable advantages such as compactness, low capital cost and applicable to a broad range of heat source temperatures. The current study is focused on thermodynamic modelling and optimization of Recuperated (RC) and Recuperated Recompression (RRC) S-CO2 Brayton cycles for exhaust heat recovery from a next generation heavy duty simple cycle gas turbine using a genetic algorithm. The Genetic Algorithm (GA) is mainly based on bio-inspired operators such as crossover, mutation and selection. This non-gradient based algorithm yields a simultaneous optimization of key S-CO2 Brayton cycle decision variables such as turbine inlet temperature, pinch point temperature difference, compressor pressure ratio. It also outputs optimized mass flow rate of CO2 for the fixed mass flow rate and temperature of the exhaust gas. The main goal of the optimization is to maximize power out of the exhaust stream which makes it single objective optimization. The optimization is based on thermodynamic analysis with suitable practical assumptions which can be varied according to the need of user. Further the optimal cycle design points are presented for both RC and RRC configurations and comparison of net power output is established for waste heat recovery.

Dynamic Simulation of a Space Reactor System with Closed Brayton Cycle Loops

2010 ◽  
Vol 26 (3) ◽  
pp. 394-406 ◽  
Author(s):  
Mohamed S. El-Genk ◽  
Jean-Michael P. Tournier ◽  
Bruno M. Gallo
Keyword(s):  
Dynamic Simulation ◽  
Reactor System ◽  
Brayton Cycle ◽  
Space Reactor

Modeling and temperature regulation of a thermally coupled reactor system via internal model control strategy

1993 ◽  
Vol 32 (12) ◽  
pp. 3029-3036 ◽  
Author(s):  
S. Y. Lee ◽  
C. J. Coronella ◽  
A. S. Bhadkamkar ◽  
J. D. Seader
Keyword(s):  
Control Strategy ◽  
Temperature Regulation ◽  
Internal Model ◽  
Internal Model Control ◽  
Reactor System ◽  
Model Control

scholarly journals A Novel Solar Receiver for Supercritical CO2 Brayton Cycle

2019 ◽  
Vol 158 ◽  
pp. 339-344 ◽  
Author(s):  
Liang Teng ◽  
Yimin Xuan
Keyword(s):  
Supercritical Co2 ◽  
Brayton Cycle ◽  
Solar Receiver

scholarly journals Preliminary prospects of a Pumped Thermal Energy Storage (PTES) based on a supercritical CO2 Brayton cycle

2021 ◽  
Author(s):  
Karin Astrid Senta Edel ◽  
František Hrdlička ◽  
Václav Novotný
Keyword(s):  
Energy Storage ◽  
Thermal Energy ◽  
Thermal Energy Storage ◽  
Supercritical Co2 ◽  
Storage Systems ◽  
Renewable Energy Sources ◽  
Brayton Cycle ◽  
Term Energy ◽  
Weather Changes

As part of the change towards a higher deployment of renewable energy sources, which naturally deliver energy intermittently, the need for energy storage systems is increasing. For compensation of disturbance in power production due to inter-day to seasonal weather changes, long-term energy storage is required. In the spectrum of storage systems, one out of a few geographically independent possibilities is the storage of electricity in heat, so-called Carnot-Batteries. This paper presents a Pumped Thermal Energy Storage (PTES) system based on a recuperated supercritical CO2 Brayton cycle. The modelled system provides a round-trip efficiency of 38.9%.

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