scholarly journals Supercritical carbon dioxide gas turbines for high-power generation

2018 ◽  
Author(s):  
Arkadiy Zaryankin ◽  
Andrey Rogalev ◽  
Sergey Osipov ◽  
Vladimir Kindra
Keyword(s):  
Carbon Dioxide ◽  
Power Generation ◽  
Supercritical Carbon Dioxide ◽  
High Power ◽  
Gas Turbines ◽  
Carbon Dioxide Gas ◽  
Supercritical Carbon

scholarly journals The flow path characteristics analysis for supercritical carbon dioxide gas turbines

2019 ◽  
Vol 124 ◽  
pp. 01006
Author(s):  
A. N. Rogalev ◽  
N. D. Rogalev ◽  
V. O. Kindra ◽  
E. Y. Grigoriev ◽  
B. A. Makhmutov
Keyword(s):  
Carbon Dioxide ◽  
Supercritical Carbon Dioxide ◽  
Gas Turbines ◽  
Velocity Ratio ◽  
Carbon Dioxide Concentration ◽  
Flow Path ◽  
Working Fluid ◽  
Carbon Dioxide Gas ◽  
Reaction Degree ◽  
Supercritical Carbon

Rising carbon dioxide concentration in the atmosphere is probably the main reason of global warming. The development of the oxy-fuel combustion cycles is a possible way to decrease the energy sector contribution in the emission process. However, an unusual composition and thermodynamic parameters of the working fluid cause the necessity of revision of the main equipment characteristics, especially for the supercritical carbon dioxide gas turbine. This study presents the method and the results of the flow path preliminary analysis for the new generation gas turbines working on carbon dioxide. The flow path shape with a constant root diameter of seven stages was chosen as the most reasonable due to cheap manufacturing. Influence of reaction degree of stages and velocity ratio on stage geometric parameters are revealed. It was found that the optimal reaction degree and velocity ratio are equal to 0.25 and 0.36 correspondingly. Thermal and constructive stages characteristics of the 350 MW turbine are determined.

scholarly journals Non-thermal pasteurization of lipid emulsions by combined supercritical carbon dioxide and high-power ultrasound treatment

2020 ◽  
Vol 67 ◽  
pp. 105138 ◽  
Author(s):  
Angela Gomez-Gomez ◽  
Edmundo Brito-de la Fuente ◽  
Críspulo Gallegos ◽  
Jose Vicente Garcia-Perez ◽  
Jose Benedito
Keyword(s):  
Carbon Dioxide ◽  
Supercritical Carbon Dioxide ◽  
High Power ◽  
Ultrasound Treatment ◽  
Lipid Emulsions ◽  
Power Ultrasound ◽  
High Power Ultrasound ◽  
Thermal Pasteurization ◽  
Supercritical Carbon

Supercritical Carbon Dioxide Turbomachinery Options for Kilowatt to Gigawatt Level Power Generation

2019 ◽  
Author(s):  
Lakshminarayanan Seshadri ◽  
Harini Nivetha Raja ◽  
Pramod Kumar ◽  
Abdul Nassar ◽  
Gaurav Giri ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Power Generation ◽  
Supercritical Carbon Dioxide ◽  
Thermodynamic Cycle ◽  
Design Tool ◽  
Shaft Speed ◽  
Design Features ◽  
Analysis And Design ◽  
Axial Turbines ◽  
Supercritical Carbon

Abstract Supercritical Carbon Dioxide Brayton cycles can be used in conjunction with a host of heat sources associated with different magnitudes of net power generation. In this paper, the overall design features of the turbomachinery, namely the turbine and compressor are evaluated for kilowatt to Gigawatt range of net cycle power using a commercial design tool — AxSTREAM®. The thermodynamic cycle considered in all cases is a simple recuperated Brayton cycle with turbine and compressor inlet temperatures of 540 °C and 45 °C respectively. The highest and lowest pressures in the cycle are 210 bar and 85 bar respectively. The preliminary design is carried out using an inverse algorithm with a meanline solver that generates many geometries for the given boundary conditions using standard loss correlations to account for different losses in turbomachines. It, thus, provides the general design features of the compressor and turbine which include — machine size, shaft speed at design point, overall efficiency, number of blades, blade heights, blade angles and number of stages for axial turbines. The choice of axial or radial impeller and initial estimates of machine size and shaft speed are made based on standard specific speed-specific diameter charts and important loss parameters are presented for each case. This study serves as a first step towards in-depth blade profiling, 3-D analysis and design of the turbomachinery required to bring this technology to the practical realm.

Supercritical carbon dioxide cycles for power generation: A review

2017 ◽  
Vol 195 ◽  
pp. 152-183 ◽  
Author(s):  
Francesco Crespi ◽  
Giacomo Gavagnin ◽  
David Sánchez ◽  
Gonzalo S. Martínez
Keyword(s):  
Carbon Dioxide ◽  
Power Generation ◽  
Supercritical Carbon Dioxide ◽  
Supercritical Carbon

Inactivation of the microbiota and effect on the quality attributes of pineapple juice using a continuous flow ultrasound-assisted supercritical carbon dioxide system

2018 ◽  
Vol 24 (7) ◽  
pp. 547-554 ◽  
Author(s):  
I Paniagua-Martínez ◽  
A Mulet ◽  
MA García-Alvarado ◽  
J Benedito
Keyword(s):  
Carbon Dioxide ◽  
Supercritical Carbon Dioxide ◽  
Vitamin C ◽  
High Power ◽  
Continuous Flow ◽  
Quality Attributes ◽  
Power Ultrasound ◽  
Pineapple Juice ◽  
High Power Ultrasound ◽  
Supercritical Carbon

Supercritical carbon dioxide inactivation technology represents a promising nonthermal processing method, as it causes minimum impact on the nutritional food properties. The aim of this study was to analyze the combined effect of supercritical carbon dioxide and high-power ultrasound on the inactivation of natural microbiota and the quality attributes of pineapple juice treated in a continuous flow system. Different juice residence times (3.06–4.6 min), at 100 bar and 31.5 ℃, were used. The results indicated that the microbiota inactivation was complete and the differences obtained in the quality attributes (2.2% for pH, 4.8% for °Brix, 2% for vitamin C) were minimal. During storage, microorganisms were not able to recover and the vitamin C decrease could be limited to 8.2% after four weeks. The results demonstrated that the supercritical carbon dioxide–high-power ultrasound technique could be an excellent alternative for the cold pasteurization of pineapple juice.

scholarly journals Research on Dynamic Modeling of the Supercritical Carbon Dioxide Power Cycle

Processes ◽  
2021 ◽  
Vol 9 (11) ◽  
pp. 1946
Author(s):  
Ping Song ◽  
Zhenxing Zhao ◽  
Lie Chen ◽  
Chunhui Dai ◽  
Chonghai Huang ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Power Generation ◽  
Supercritical Carbon Dioxide ◽  
Dynamic Model ◽  
Dynamic Performance ◽  
Maximum Error ◽  
Application Fields ◽  
And Control ◽  
Recompression Cycle ◽  
Supercritical Carbon

The supercritical carbon dioxide (SCO2) Brayton cycle, as a substitute for the steam cycle, can be widely used in a variety of power generation scenarios. However, most of the existing SCO2 cycle studies are restricted to basic thermodynamics research, parameter optimizations, system design in different application fields, and even economic analysis. Considering the load variability and control flexibility of the power generation system, the dynamic performance research of the SCO2 cycle is also crucial, but the work done is still limited. Based on the previous studies, Simulink software is used in this paper to develop a dynamic model of the 20 MW-SCO2 recompression cycle, which specifically includes component models that can independently realize physical functions and an overall closed-loop cycle model. A series of comparative calculation are carried out to verify the models and the results are very positive. The SCO2 recompression power system is built with the developed models and the dynamic model runs stably with a maximum error of 0.56%. Finally, the simulation of the dynamic switching conditions of the 20 MW-SCO2 recompression cycle are performed and the analysis results supply instructive suggestions for the system operation and control.

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