Numerical study of heterogeneous condensation in the de Laval nozzle to guide the compressor performance optimization in a compressed air energy storage system

Zhang, Guojie; Yang, Yifan; Chen, Jiaheng; Jin, Zunlong; Dykas, Sławomir

doi:10.1016/j.apenergy.2023.122361

Cited by 31 publications

(4 citation statements)

References 36 publications

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“…Due to the regular geometry of the flow field, a hexahedral mesh is selected to meshing the flow field, and the mesh direction is aligned with the airflow direction as much as possible. The thickness of the first layer of the mesh is set to be 1 × 10 −3 mm to meet the requirement of the mesh size value Y+ for the computational accuracy of the SST turbulence model (Zhang et al, 2024b). The finite-element calculation model and the mesh of the air flow field are shown in Figure 3.…”

Section: Construction Of the Wide-chord Hollow Fan Blade And Air Doma...mentioning

confidence: 99%

Mechanical response analysis of the wide-chord hollow fan blade considering the fluid–structure interaction

Zhang,

Wang,

et al. 2024

Front. Energy Res.

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The aero-engine wide-chord hollow fan blade with a cavity stiffener structure can effectively reduce the weight and greatly increase the rotational speed. However, during the high-speed rotation process of the hollow fan, there is a strong coupling effect between the solid domain of the blade and the incoming air. This effect leads to a certain deformation of the rotor blade, which has a large impact on the structural strength of the blade. Aiming at the problem of the fluid–structure interaction in its operation, the finite-element method was used to simulate the two-layer structure of the TC4 titanium alloy wide-chord hollow fan blade. The centrifugal force and fluid–structure coupling effect were considered when carrying out the research on the structural mechanical characteristics of the blade. The results show that the maximum equivalent stress of the blade considering the fluid–structure coupling effect is 508 MPa at the rotational speed of 2,900 r/min, which is approximately 18% higher than the maximum stress when only the centrifugal force is considered. This phenomenon indicates that the effect of aerodynamic force on the blade stress cannot be ignored. The stress concentration area of the blade is located in the third stiffener from the leading edge and near the root of the blade, and the aerodynamic force has a more significant effect on the radial stress distribution of the blade. Further analysis of the equivalent stress distribution along the blade tip direction shows a trend of first increasing and then decreasing. The maximum equivalent stress appears at a distance of 30 mm up to the bottom of the stiffener.

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Section: Construction Of the Wide-chord Hollow Fan Blade And Air Doma...mentioning

confidence: 99%

Mechanical response analysis of the wide-chord hollow fan blade considering the fluid–structure interaction

Zhang,

Wang,

et al. 2024

Front. Energy Res.

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“…The rapid annual increase in atmospheric CO 2 concentration, primarily driven by fossil fuel-based power plants, is the foremost environmental concern today . In November 2017 (COP23), , efforts were concentrated on formulating rules to enact the 2015 Paris Agreement, aiming to advance the development of CO 2 capture technologies with the goal of restricting the global temperature increase to 2 °C. , Achieving this goal requires equipping roughly 95% of coal-based power plants and 40% of gas-combustion-based electricity-generating plants with CO 2 capture technology .…”

Section: Introductionmentioning

confidence: 99%

Tailoring Sepiolite for Efficient CO₂ Desorption: A Sustainable Approach Utilizing Acid Activation for Amine Regeneration Optimization

Li,

Bhatti,

et al. 2024

Ind. Eng. Chem. Res.

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In the context of industrial CO2 capture, the need for efficient solvent regeneration at lower temperatures poses a significant challenge. Catalyst-assisted enhancement of the CO2 desorption kinetics has emerged as a potential solution. This study introduces a series of cost-effective and readily available sepiolite clay-based catalysts activated via simple acid treatments. This activation significantly enhances both the surface area and surface acidity, laying the foundation for more effective catalysts. Experimental results at a moderate temperature of 88 °C demonstrate the effectiveness of the prepared catalysts, resulting in remarkable improvements: up to a 163.6% increase in the CO2 desorption rate, an up to 83.6% increase in the desorbed CO2 quantity, and a reduction of up to 45.6% in heat duty compared with the baseline amine solution. Furthermore, the prepared catalysts exhibit facile separability through filtration and sustained stability over 10 cycles. To shed light on the underlying chemical processes, we also present a plausible reaction mechanism for the acid-activated sepiolite-catalyzed CO2 desorption reaction. This research holds promise for environmentally friendly and cost-effective amine regeneration processes in CO2 capture applications.

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“…Another aspect of multiphase modelling is the phase change process, which considerably influences the performance characteristics and flow patterns. Condensation occurs in equilibrium and high-speed non-equilibrium modes, which often takes place in the supersonic nozzle [26][27][28][29]. In gas-liquid ejectors, the jet is highly turbulent and liquid and gas after mixing form a fairly homogeneous mixture with high mass transfer rates [30][31][32][33].…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation of a Two-Phase Ejector Operation Taking into Account Steam Condensation with the Presence of CO2

Kuś,

Madejski

2024

Energies

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The application of a two-phase ejector allows for the mixing of liquid and gas and provides effective heat transfer between phases. The aim of the study is a numerical investigation of the performance of a water-driven, condensing two-phase ejector. The research was performed using CFD methods, which can provide an opportunity to analyze this complex phenomenon in 2D or 3D. The 2D axisymmetric model was developed using CFD software Siemens StarCCM+ 2022.1.1. The Reynolds-Averaged Navier–Stokes (RANS) approach with the Realisable k-ε turbulence model was applied. The multiphase flow was calculated using the mixture model. The boiling/condensation model, where the condensation rate is limited by thermal diffusion, was applied to take into account direct contact condensation. Based on the mass balance calculations and developed pressure and steam volume fraction distributions, the ejector performance was analyzed for various boundary conditions. The influence of the suction pressure (range between 0.812 and 0.90) and the steam mass flow rate (range between 10 g/s and 25 g/s) is presented to investigate the steam condensation phenomenon inside the ejector condenser. The provided mixture of inert gas (CO2) with steam (H2O) in the ejector condenser was investigated also. The weakening of the steam condensation process by adding CO2 gas was observed, but it is still possible to achieve effective condensation despite the presence of inert gas.

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Numerical study of heterogeneous condensation in the de Laval nozzle to guide the compressor performance optimization in a compressed air energy storage system

Cited by 31 publications

References 36 publications

Mechanical response analysis of the wide-chord hollow fan blade considering the fluid–structure interaction

Mechanical response analysis of the wide-chord hollow fan blade considering the fluid–structure interaction

Tailoring Sepiolite for Efficient CO₂ Desorption: A Sustainable Approach Utilizing Acid Activation for Amine Regeneration Optimization

Numerical Investigation of a Two-Phase Ejector Operation Taking into Account Steam Condensation with the Presence of CO2

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Numerical study of heterogeneous condensation in the de Laval nozzle to guide the compressor performance optimization in a compressed air energy storage system

Cited by 31 publications

References 36 publications

Mechanical response analysis of the wide-chord hollow fan blade considering the fluid–structure interaction

Mechanical response analysis of the wide-chord hollow fan blade considering the fluid–structure interaction

Tailoring Sepiolite for Efficient CO2 Desorption: A Sustainable Approach Utilizing Acid Activation for Amine Regeneration Optimization

Numerical Investigation of a Two-Phase Ejector Operation Taking into Account Steam Condensation with the Presence of CO2

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Tailoring Sepiolite for Efficient CO₂ Desorption: A Sustainable Approach Utilizing Acid Activation for Amine Regeneration Optimization