scholarly journals Techno-Economic Optimization of CSP Plants with Free-Falling Particle Receivers

Entropy ◽  
2021 ◽  
Vol 23 (1) ◽  
pp. 76
Author(s):  
Luis F. González-Portillo ◽  
Kevin Albrecht ◽  
Clifford K. Ho
Keyword(s):  
Particle Systems ◽  
System Configuration ◽  
Economic Optimization ◽  
Actual System ◽  
Cfd Simulations ◽  
Levelized Cost Of Electricity ◽  
Systems Models ◽  
Main Components ◽  
Receiver Model ◽  
Free Falling

Particle receivers are one of the candidates for the next generation of CSP plants, whose goal is to reduce the levelized cost of electricity (LCOE) to 0.05 $/kWh. This paper presents a techno-economic analysis to study if a CSP system with free-falling particle receiver can achieve this goal. The plant analyzed integrates two ground-based bins to store the excess energy and a supercritical CO2 cycle to generate electricity. The model used for the analysis presents several upgrades to previous particle systems models in order to increase its fidelity, accuracy, and representativeness of an actual system. The main upgrades are the addition of off-design conditions during the annual simulations in all the components and an improved receiver model validated against CFD simulations. The size of the main components is optimized to obtain the system configuration with minimum LCOE. The results show that particle CSP systems can reduce the LCOE to 0.056 $/kWh if the configuration is composed of 1.61 × 106 m2 of heliostats, a 250 m high tower with a 537 m2 falling particle curtain, and 16 h thermal energy storage.

Sensitivity Analysis of the Levelized Cost of Electricity for a Particle-Based CSP System

2021 ◽  
Author(s):  
Luis F. González-Portillo ◽  
Kevin J. Albrecht ◽  
Jeremy Sment ◽  
Brantley Mills ◽  
Clifford K. Ho
Keyword(s):  
Sensitivity Analysis ◽  
Heat Exchanger ◽  
Upper Bounds ◽  
Cumulative Distribution ◽  
Wind Effect ◽  
Lower And Upper Bounds ◽  
Levelized Cost Of Electricity ◽  
Receiver Model ◽  
Tower Height ◽  
And Storage

Abstract This study presents a sensitivity analysis of the LCOE for a particle-based system with the costs of the most current components. New models for the primary heat exchanger, thermal energy storage and tower are presented and used to establish lower and upper bounds for these three components. The rest of component costs such as particle cost, cavity cost, lift cost and balance of power are set to lower and upper bounds estimating a 25% of uncertainty. Some relevant parameters such as lift efficiency and storage thermal resistance are also included in the analysis with a 25% uncertainty. This study also includes an upgrade to the receiver model by including the wind effect in the efficiency, which was not included in previous publications. A parametric analysis shows the optimum values of solar multiple, storage hours, tower height and concentration ratio, and a probabilistic analysis provides a cumulative distribution function for a range of LCOE values. The results show that the LCOE could be below $0.06/kWh with a probability of 90%, where the highest uncertainty is on the primary heat exchanger cost.

CFD Analysis on Similarity Criteria of Hydrodynamic Characteristics for Gravity-Installed Anchors

2019 ◽  
Author(s):  
Jiancai Gao ◽  
Haixiao Liu
Keyword(s):  
Model Testing ◽  
Model Tests ◽  
Similarity Criteria ◽  
Scale Model ◽  
Hydrodynamic Characteristics ◽  
Cfd Analysis ◽  
Cfd Simulations ◽  
Tests Of Gravity ◽  
Free Falling ◽  
Reduced Scale

Abstract For reduced-scale model tests of gravity-installed anchors (GIAs), it is of great significance to extrapolate the testing results to prototype. This highlights the necessity of investigation of similarity criteria. The present work aims to find the similarity criteria of three prioritized hydrodynamic characteristics including VT, HP, and Cd for GIAs during installation in water through CFD simulations. In the present study, free falling processes of different reduced-scale T98 anchor models and prototype anchor is simulated, from which VT, HP, and Cd are extracted and analyzed to get the fitting curves for these three characteristics over reduced-scale λ. Based on these curves, hydrodynamic characteristics for prototype and other reduced-scale model can be extrapolated from model testing results. And, the researching procedure in this paper sets an example and reference to study about similarity criteria for other hydrodynamic characteristics.

Power Management of a Stand-Alone Hybrid Wind/PV Integrated Oxygen Generator and Water Treatment Equipment System

2012 ◽  
Vol 516-517 ◽  
pp. 1798-1802 ◽  
Author(s):  
Jiang Ping Mei ◽  
Xing Quan Cheng ◽  
Yi Liu
Keyword(s):  
Water Treatment ◽  
Power Management ◽  
Management Strategy ◽  
Photovoltaic System ◽  
System Configuration ◽  
Power Management Strategy ◽  
Oxygen Generator ◽  
Treatment Equipment ◽  
Main Components ◽  
Equipment System

The hybrid wind/PV(photovoltaic) system supplies more stable power than a single wind or PV source so that the combined utilization of the wind turbine and PV array is becoming increasingly attractive. “The stand-alone hybrid wind/PV integrated oxygen generator and water treatment equipment system” is a new application of the hybrid wind/PV system. This paper deals with the power management strategy of the system for satisfying the demands with the limited coming energy. For the reason that the system is a completely new use, the system configuration is put forward in the first place. As a basis, this paper then analyses the main components’ characteristics. At last, on account of the system configuration and the main components’ characteristics, the power management strategy of the system is proposed.

Many-particle systems: Models of inhomogeneous matter

1989 ◽  
Vol 157 (1) ◽  
pp. 244-261 ◽  
Author(s):  
U. Kreibig ◽  
M. Quinten ◽  
D. Schoenauer
Keyword(s):  
Particle Systems ◽  
Systems Models

scholarly journals Research on capacity configuration method of microgrid considering system cost

2020 ◽  
Vol 198 ◽  
pp. 01051
Author(s):  
Ning Hu ◽  
Juncheng Si ◽  
Yuanyuan Wang ◽  
Dehua Wang ◽  
Hanghang Liu ◽  
...  
Keyword(s):  
Power Supply ◽  
Simulation Analysis ◽  
System Configuration ◽  
Economic Optimization ◽  
Analysis Model ◽  
Engineering Construction ◽  
New Type ◽  
Grid Construction ◽  
Configuration Scheme ◽  
Operation Cost

Microgrid is a new type of power supply structure and will play an important role in ensuring power supply. Because of the high cost of micro grid construction, this is very necessary to determine the lowest capacity configuration and realize the best function configuration, which is an urgent problem in engineering construction. Therefore, this paper first establishes simulation analysis model, puts forward economic optimization model and constraints, and formulates system configuration scheme and construction cost. The results show that the method is feasible and effective. This scheme not only reduces the operation cost of the system, but also provides a reference for the construction of microgrid engineering.

Study of a Multistage Canned Motor Pump: Simulation, Optimization and Validation

2019 ◽  
Author(s):  
Helmut Benigni ◽  
Markus Mosshammer ◽  
Helmut Jaberg
Keyword(s):  
Early Stage ◽  
Turbulence Models ◽  
Relative Increase ◽  
Cfd Simulations ◽  
Loss Analysis ◽  
Wide Range ◽  
Structured Meshes ◽  
Optimized Model ◽  
Main Components ◽  
Canned Motor

Abstract This paper describes the detailed analysis of a multistage canned motor pump with an additional radial suction impeller by means of CFD simulations to determine the main losses and to establish optimization potential of the hydraulic parts. In addition to the main flow channels of the impeller, the degree of detail of the analysis also includes the front and rear impeller side spaces, relief holes, gaps, return sections and all hydraulically wetted surfaces of the canned motor. The model presented was successively generated and already at a very early stage it was obvious that the model has to contain all details mentioned in order to provide valuable simulation results. For the impeller, the gaps and the pressure relief holes primarily structured meshes were used with a final model of the existing pump consisting of more than 35 million nodes. The behavior of the main components was analyzed in detail and additionally the CFD simulations — stationary and transient — with scale resolving turbulence models were validated by means of model tests. Furthermore, a comprehensive loss analysis of the existing pump was performed to verify the optimization potential. The subsequent optimization was realized semi-automated. A tight corset of requirements, e.g. identical head curve, suction behavior and dimensions, has been defined to guarantee retrofit capability of the pump analyzed in order to fully satisfy the demand for a constant delivery head curve and at the same time to provide for a relative increase of the optimum efficiency by 25% and in a wide range of applications by at least 20%. The optimized model was manufactured based on rapid prototyping and tested in the laboratory. The results show a satisfying correlation between the numerically predicted and the measured results on the test rig and prove the high quality of the numerical simulations run.

scholarly journals Economic Optimization of a Concentrating Solar Power Plant With Molten-Salt Thermocline Storage

2013 ◽  
Vol 136 (1) ◽  
Author(s):  
Scott M. Flueckiger ◽  
Brian D. Iverson ◽  
Suresh V. Garimella
Keyword(s):  
Power Plant ◽  
Molten Salt ◽  
Fossil Fuels ◽  
Minimum Cost ◽  
Plant Performance ◽  
System Level ◽  
Weather Data ◽  
Economic Optimization ◽  
Levelized Cost Of Electricity ◽  
System Level Simulation

System-level simulation of a molten-salt thermocline tank is undertaken in response to year-long historical weather data and corresponding plant control. Such a simulation is enabled by combining a finite-volume model of the tank that includes a sufficiently faithful representation at low computation cost with a system-level power tower plant model. Annual plant performance of a 100 MWe molten-salt power tower plant is optimized as a function of the thermocline tank size and the plant solar multiple (SM). The effectiveness of the thermocline tank in storing and supplying hot molten salt to the power plant is found to exceed 99% over a year of operation, independent of tank size. The electrical output of the plant is characterized by its capacity factor (CF) over the year, which increases with solar multiple and thermocline tank size albeit with diminishing returns. The economic performance of the plant is characterized with a levelized cost of electricity (LCOE) metric. A previous study conducted by the authors applied a simplified cost metric for plant performance. The current study applies a more comprehensive financial approach and observes a minimum cost of 12.2 ¢/kWhe with a solar multiple of 3 and a thermocline tank storage capacity of 16 h. While the thermocline tank concept is viable and economically feasible, additional plant improvements beyond those pertaining to storage are necessary to achieve grid parity with fossil fuels.

Techno-Economic Optimization of Molten Salt Concentrating Solar Power Parabolic Trough Plants With Packed-Bed Thermocline Tanks

2020 ◽  
Vol 142 (5) ◽  
Author(s):  
Freerk Klasing ◽  
Tobias Hirsch ◽  
Christian Odenthal ◽  
Thomas Bauer
Keyword(s):  
Molten Salt ◽  
Power Plants ◽  
Thermal Power ◽  
Particle Diameter ◽  
Packed Bed ◽  
System Level ◽  
Economic Optimization ◽  
System Behavior ◽  
Parabolic Trough ◽  
Levelized Cost Of Electricity

Abstract This study focuses on the techno-economic optimization of direct molten salt parabolic trough solar thermal power plants (STPPs) equipped with thermocline filler (TCF) thermal energy storage (TES). On one hand, this technology allows for cost reductions compared with state of the art two-tank (2T) TES. On the other hand, however, it leads to a performance decrease of the power block (PB) due to partial part load operation. To evaluate the dominating effect, annual simulations on a system level are performed for the TCF direct molten salt storage concept and, as a reference, for the two-tank direct molten salt storage concept. The levelized cost of electricity (LCOE) serves as a global measure to compare the two systems and to optimally size the TCF storage and the solar field (SF). The result of this study is that LCOE can theoretically be reduced by up to 8% by using a TCF instead of 2T storage system. The influence of temperature deviations from the nominal value at the end of charge or discharge, porosity and particle diameter of the TCF on LCOE, and system behavior is investigated in detail. This study further presents alternative operation strategies with improved system behavior and reveals determining factors for the integration of TCF storage into a system.

scholarly journals The sociological approach to analysis of state of system of mandatory medical insurance and perspectives of its development

2019 ◽  
Vol 60 (4) ◽  
pp. 183-186
Author(s):  
Andrey A. Kozhevnikov
Keyword(s):  
Medical Insurance ◽  
Actual Condition ◽  
Social Mechanisms ◽  
Main Attention ◽  
Actual System ◽  
Healthy Life ◽  
Sociological Approach ◽  
Healthy Life Style ◽  
Main Components

The article considers scientifically substantiated sociological approach to development of socially oriented policy related to medical insurance and health care. Specifically, actual condition and problems of medical insurance is captured. The new system of medical social co-financing based on application of social economical methods of motivation is proposed with purpose of ensuring observance of healthy life-style by population and minimization of preventable losses. The shortcomings of actual system of mandatory medical insurance are enumerated and means to rectify them are proposed. At that, main attention is paid to searching for social mechanisms which combined with administrative measures can significantly increase quality of medical services and simplify character of relationships occurred apropos of this. The main components of the system of medical social co-financing and ensured positive possibilities achieved are emphasized.

Sensitivity Analysis of the Levelized Cost of Electricity for a Particle-Based CSP System

2021 ◽  
pp. 1-19
Author(s):  
Luis F. González Portillo ◽  
Kevin Albrecht ◽  
Clifford K. Ho ◽  
Jeremy Sment ◽  
Brantley Mills
Keyword(s):  
Sensitivity Analysis ◽  
Heat Exchanger ◽  
Upper Bounds ◽  
Cumulative Distribution ◽  
Wind Effect ◽  
Lower And Upper Bounds ◽  
Levelized Cost Of Electricity ◽  
Receiver Model ◽  
Tower Height ◽  
And Storage

Abstract This study presents a sensitivity analysis of the LCOE for a particle-based system with the costs of the most current components. New models for the primary heat exchanger, thermal energy storage and tower are presented and used to establish lower and upper bounds for these three components. The rest of component costs such as particle cost, cavity cost and lift cost are set to lower and upper bounds estimating an uncertainty between 25% and 50%. Other relevant parameters related to lift and storage performance are also included in the analysis with the same uncertainty. This study also includes an upgrade to the receiver model by including the wind effect in the efficiency, which was not included in previous publications and may have a big impact in the system design. A parametric analysis shows the optimum values of solar multiple, storage hours, tower height and concentration ratio, and a probabilistic analysis provides a cumulative distribution function for a range of LCOE values. The results show that the LCOE could be below $0.06/kWh with a probability of between 80% and 90%, where the costs of primary heat exchanger, particles and lifts have largest contribution to the variance of the LCOE.

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