This work presents an innovative indirect supercritical CO2 – air driven concentrated solar power plant with a packed bed thermal energy storage. High turbine inlet temperature can be achieved, avoiding the limitations set by use of molten salts as primary heat transfer fluid. The storage enables decoupling between irradiation collection and electricity production, it grants operational flexibility while enhancing capacity factor. A quasi steady state thermo-economic model integrated...

High temperature thermal energy storages are becoming more and important as a key component in concentrating solar power plants. Packed bed represent an economically viable large scale storage solution. The present work deals with the analysis optimization of packed storage. influence quasi-dynamic boundary conditions on thermodynamic performance is evaluated. Levelized Cost Storage innovatively applied to design. A complete methodology design proposed. In doing so, comprehensive...

High-temperature packed-bed thermal energy storage represents an economically viable large-scale solution for a future fossil-free scenario. The present work introduces first-of-a-kind experimental setup of radial TES, and its performance assessment based on investigations. is analyzed set dimensionless criteria indicators. laboratory-scale prototype has capacity 49.7 kWhth working temperatures between 25 °C 700 with non-pressurized dry airflow. influence different fluid mass flow rates...

The present work introduces an innovative layered radial flow packed-bed thermal energy storage able to provide enhanced and hydrostatic performance, limiting their inherent trade-off. performance of the proposed concept is modelled, in both hydrodynamic aspects, via a 1D-two phases numerical approach. Representative sizes for industrial applications laboratory prototype are considered highlight potential scaling representativeness prototyping. Configurations with two three coaxial layers...

This paper investigates ellipsoid-shaped macro-encapsulated phase change material (PCM) on a component scale. The selected PCM is paraffin-based commercial material, namely ATP60; differential scanning calorimetry and transient plane source method are used to measure ATP60's thermo-physical properties. A 0.382 m3 latent heat thermal energy storage (LHTES) has been built experimentally characterized. temperature measurement results indicate that thermocline was retained in the packed bed...

Ceramic-based packed bed solutions are becoming more common in the energy fields as both thermal storage and heat exchanger. Such usually designed for working temperature ranges above 600 °C, thus radiation becomes significant even acts dominant transfer mechanism. Therefore, applying high-temperature coatings with different properties could be an efficient way enhancing performance of these applications. In this work, long residency cyclic stability six inorganic applied on a ceramic...

High-temperature thermal energy storage is becoming more and important as a key component in concentrating solar power systems an economically viable large-scale solution. Ceramics natural rocks based packed beds are one of the attracting solutions. For application temperatures above 600 °C, radiation heat transfer becomes dominant phenomenon it greatly influences performance systems. Coatings with different properties (mainly emissivity conductivity) could be exploited to modify effective...

The industrial sector is a major source of wealth, producing about one-quarter the global gross product. However, industry also emitter CO2 and it represents key challenge towards achieving worldwide emission reduction targets. Nowadays, 22 % overall energy demand heating for sector, generating 40 emissions. Solutions to decarbonize are needed. This work presents techno-economic assessment molten salts based power-to-heat solution aiming at decarbonizing requiring medium temperature heat...

High-temperature thermal energy storage is recognized to be a key technology ensure future sustainable generation. Packed bed cost-competitive large-scale solution. The present work introduces the experimental investigation of an innovative 49.7 kWhth radial-flow type high-temperature packed under dynamic mass flow rates. Various air rate profiles, representative different potential applications, have been tested during charging process investigate their influence on thermodynamic...

In light of the global industrial sector's steadfast pursuit sustainable solutions to mitigate carbon emissions and efficiently minimize energy inefficiencies, significance novel approaches optimization becomes increasingly evident. This research presents a digital twin concept that is designed enhance efficiency effectiveness high-temperature heat pumps in renewable systems. Through utilization real-time data complex computer modeling techniques, our proposed model seamlessly comprehensive...

Abstract High-efficient supercritical CO2 (sCO2) power blocks and the hybridization with solar photovoltaic (PV) plants have been identified as two viable solutions to enhance economic competitiveness of Concentrating Solar Power (CSP) plants. This work introduces an innovative hybrid PV-CSP system layout molten salt thermal energy storage a sCO2 block. An active has proposed employing electric heater that allows storing excess PV production energy. The scalability plant investigated using...

The cavity wall is an important part of a receiver in determining the efficiency. Using solar selective reflector (SSR) materials with low absorptivity and high thermal emissivity for design one efficient way to improve In this work, we present systematic study optical high-temperature stability performances six different SSR materials: refractory ceramic fiber based substrate material (Fiberfrax 140) five metallic oxide coatings which are prepared by mixing powders alumina, magnesium...

Ceramic particles based packed bed systems are attracting the interesting from various high-temperature applications such as thermal energy storage, nuclear cooling reactors, and catalytic support structures. Considering that these work above 600 °C, radiation becomes significant or even major heat transfer mechanism. The use of coatings with different optical properties could represent a way to tune enhance thermodynamic performances systems. In this study, stability several metallic...

The present work deals with the initial design and performance evaluation of a novel thermal energy storage concept consisting packed bed rocks radial gas flow, suitable for generation air-driven concentrating solar power plants. In doing so, this article also presents state art most promising concepts, highlighting their advantages disadvantages, all considered in new proposed system. A thermomechanical model was developed used simulations to assess its behavior during both charging...

Abstract The present work introduces an indirect supercritical CO2–air driven concentrated solar plant with a packed bed thermal energy storage. proposed design enables CO2 turbine inlet temperature of 800°C, overcoming the limits imposed by use molten salts as primary heat transfer fluid. Furthermore, storage permits decoupling between power collection from sun and electricity generation. Besides, unit grants operational flexibility enlarges capacity factor, making it available conventional...

Abstract The industrial sector is a major source of wealth, producing about one-quarter the global gross product. However, industry also emitter CO2 and it represents key challenge toward achieving worldwide emission reduction targets. Nowadays, 22% overall energy demand heating for sector, generating 40% emissions. Additionally, 30% final electricity. Solutions to decarbonize are needed. This work presents techno-economic assessment four different molten salts-based power-to-heat-to-heat...

Abstract The industrial sector is a major source of wealth, producing about one-quarter the global gross product. However, industry also emitter CO2 and it represents key challenge towards achieving worldwide emission reduction targets. Nowadays, 22% overall energy demand heating for sector, generating 40% emissions. Additionally, 30% final electricity. Solutions to decarbonize are needed. This work presents techno-economic assessment four different molten salts based power-to-heat-to-heat...

The present work performs a techno-economic analysis of an innovative solar-hybrid combined cycle composed topping gas turbine coupled to bottoming packed bed thermal energy storage at the exhaust, which runs in parallel steam cycle. Plant performances have been evaluated terms capacity factor, specific CO2 emissions, capital expenditure, and Levelised Cost Electricity. influence combustion chamber outlet temperature, solar multiple has assessed by means sensitivity analysis. study also...

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