Modelling and Numerical Simulation for an Innovative Compound Solar Concentrator: Thermal Analysis by FEM Approach

Carlini, Maurizio; McCormack, Sarah; Castellucci, Sonia; Ortega, Anita; Rotondo, Mirko; Mennuni, Andrea

doi:10.3390/en13030548

Cited by 12 publications

(6 citation statements)

References 44 publications

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“…The electrical and thermal conditions are set to be same as the experiments. Both models are implemented by using COMSOL Multiphysics, which is a general-purpose simulation software using finite element analysis method (FEM) and applied for a number of scientific fields [24]. The "Transport of Diluted Species", the "Heat Transfer in Solids", and the "Electrostatics" modules have been applied to simulate the charge dynamics migrating in electric field.…”

Section: Space Charge Modelling Methodsmentioning

confidence: 99%

Space Charge Measurement and Modelling in Cross-Linked Polyethylene

et al. 2020

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Cross-linked polyethylene, commercially known as XLPE, is widely used as an insulating material in high voltage cables. However, space charge accumulation under the DC field is one of the most challenging problems in the further development of XLPE insulated cable. Due to the potential electrical degradation ageing process triggered by the accumulated space charges, the IEEE standard 1732 was established for measuring space charge in HVDC extruded cables as the qualification tests. Previous research has revealed that space charge originates from either charge injection at the electrodes or ionization of impurities presenting inside the bulk. In the light of this, this paper aims to simulate the accumulation of space charge in XLPE under DC stress. Space charge measurements have been carried on the fresh and degassed XLPE samples. A modified bipolar charge transport model, by considering the dissociation of impurities, has been employed to simulate the space charge behavior in XLPE. Compared with the experimental observations, the simulation results can reveal appropriate features of hetero charge formation. Both the calculated charge dynamics and field variation are consistent with the experiment results. The restrictions and potential improvements of this preliminary model are also discussed for its future application of XLPE cables.

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Section: Space Charge Modelling Methodsmentioning

confidence: 99%

Space Charge Measurement and Modelling in Cross-Linked Polyethylene

et al. 2020

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“…The main governing equations of the physics involved in HPDC models at the macroscale level are the conservation of energy (1), the mass conservation or continuity Equation (2), and the Boussinesq form of the Navier-Stokes equation for incompressible Newtonian fluids (3), where ρ represents density, h enthalpy, t time, ν velocity, k thermal conductivity, T temperature, Ṙq heat generation per unit mass, ρ 0 density at the reference temperature and pressure, p modified pressure, µ l shear viscosity, g gravity, and β T the volumetric thermal expansion coefficient. In addition, some additional equations were used to calculate aspects related to the microstructure and specific algorithms for defect prediction .…”

Section: Numerical Simulations: Obtaining the Datamentioning

confidence: 99%

“…A large number of scientific and engineering fields study complex real-world phenomena or solve challenging design problems with simulation techniques [1][2][3][4]. However, in many cases, the computational cost of these simulations makes their use impossible for real-time predictions and limits their application in optimization tasks.…”

Section: Introductionmentioning

confidence: 99%

Metamodels’ Development for High Pressure Die Casting of Aluminum Alloy

Anglada

Boto

Cortázar

et al. 2021

Metals

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Simulation is a very useful tool in the design of the part and process conditions of high-pressure die casting (HPDC), due to the intrinsic complexity of this manufacturing process. Usually, physics-based models solved by finite element or finite volume methods are used, but their main drawback is the long calculation time. In order to apply optimization strategies in the design process or to implement online predictive systems, faster models are required. One solution is the use of surrogate models, also called metamodels or grey-box models. The novelty of the work presented here lies in the development of several metamodels for the HPDC process. These metamodels are based on a gradient boosting regressor technique and derived from a physics-based finite element model. The results show that the developed metamodels are able to predict with high accuracy the secondary dendrite arm spacing (SDAS) of the cast parts and, with good accuracy, the misrun risk and the shrinkage level. Results obtained in the predictions of microporosity and macroporosity, eutectic percentage, and grain density were less accurate. The metamodels were very fast (less than 1 s); therefore, they can be used for optimization activities or be integrated into online prediction systems for the HPDC industry. The case study corresponds to several parts of aluminum cast alloys, used in the automotive industry, manufactured by high-pressure die casting in a multicavity mold.

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“…To achieve this optimization, numerical methods such as the Finite Element Method (FEM) and specialized modeling and analysis software like ABAQUS are essential. Notable works have demonstrated the efficacy of these tools in this context [11,12].…”

Section: Introductionmentioning

confidence: 99%

Experimental and finite element modeling of solar concentrators in the sugarcane bagasse drying process

E Silva,

Gomes,

Lustosa

et al. 2023

Cad. Pedagógico

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Reducing the environmental impact of residues generated by the Brazilian agroindustry can be achieved through the utilization of sugarcane bagasse, a biomass resource widely employed. However, this biomass's high moisture content results in low energy production efficiency. The conversion of sunlight into thermal energy using Concentrated Solar Energy (CSE) has emerged as an efficient alternative for the sugarcane bagasse drying process. In this study, we propose to experimentally evaluate and numerically simulate, employing the Finite Element Method (FEM) and the ABAQUS software, a solar concentrator receiver utilized in the drying process. The methodology employed comprises two modeling phases: an experimental phase, wherein two solar concentrators were constructed within a metallic structure, each with distinct surface areas and a panel of adjustable flat mirrors designed to focus solar radiation on a central point—the reactor. Experiments were conducted involving water, sugarcane bagasse, and reactor characterization. Subsequently, a numerical modeling phase was carried out, analyzing two scenarios: a stationary one and a transient one accounting for temperature variations over time. FEM simulations were conducted using the ABAQUS program. The results obtained from the experiments underscore the significance of radiation reaching the reactor as the primary factor in achieving the required efficiency for drying sugarcane bagasse. This finding was corroborated by the numerical simulations, which considered thermal gradients and thermal stress.

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Modelling and Numerical Simulation for an Innovative Compound Solar Concentrator: Thermal Analysis by FEM Approach

Cited by 12 publications

References 44 publications

Space Charge Measurement and Modelling in Cross-Linked Polyethylene

Space Charge Measurement and Modelling in Cross-Linked Polyethylene

Metamodels’ Development for High Pressure Die Casting of Aluminum Alloy

Experimental and finite element modeling of solar concentrators in the sugarcane bagasse drying process

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