Suppression effect of bionic guide vanes with different parameters on the hump characteristics of pump-turbines based on entropy production theory

Energy, Journal Year: 2023, Volume and Issue: 283, P. 128650 - 128650

Published: Aug. 4, 2023

Language: Английский

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Life Cycle Assessment of Energy Storage Technologies for New Power Systems under Dual‐Carbon Target: A Review

Energy Technology, Journal Year: 2024, Volume and Issue: 12(5)

Published: Feb. 19, 2024

Aiming at the grid security problem such as frequency, voltage, and power quality fluctuation caused by large‐scale grid‐connected intermittent new energy, this article investigates life cycle assessment of energy storage technologies based on technical characteristics performance indicators. First, system under dual‐carbon target is reviewed, which compared with traditional from generation side, user side. Based system, mechanism mechanical storage, electrochemical chemical electromagnetic thermal are described. Then, existing research strategies, a comprehensive carried out four dimensions: performance, economic cost, safety assessment, environmental impact. Moreover, suitable scenarios application functions various side analyzed working principle, key technologies, advantages disadvantages, difficulties technologies. Finally, combined in electricity market, profit models analyzed.

Language: Английский

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Optimal sizing and location of grid-interfaced PV, PHES, and ultra capacitor systems to replace LFO and HFO based power generations

Scientific Reports, Journal Year: 2024, Volume and Issue: 14(1)

Published: April 13, 2024

Abstract The impacts of climate change, combined with the depletion fossil fuel reserves, are forcing human civilizations to reconsider design electricity generation systems gradually and extensively incorporate renewable energies. This study aims investigate technical economic aspects replacing all heavy oil (HFO) light (LFO) thermal power plants connected grid in southern Cameroon. proposed energy system consists a solar photovoltaic (PV) field, pumped hydroelectric storage (PHES) system, an ultra-capacitor system. performance new was assessed using metrics such as total annualized project cost (TAC), loss load probability (LOLP), supply (LPSP). Multi-Objective Bonobo Optimizer (MOBO) used both size components choose best location for PV array. results achieved MOBO were superior those obtained from other known optimization techniques. Using metaheuristics sizing necessitated creation mathematical models techno-economic decision criteria under MATLAB software. Based on deficit rate (LPSP) zero, installation field Bafoussam had lowest TAC around 52.78 × 10 6 € when compared Yaoundé, Bamenda, Douala, Limbe. Finally, profitability analysis determined that is financially viable produced by sold at average price 0.12 €/kWh.

Language: Английский

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A short-term wind-hydrothermal operational framework in the presence of pumped-hydro storage

e-Prime - Advances in Electrical Engineering Electronics and Energy, Journal Year: 2024, Volume and Issue: 8, P. 100577 - 100577

Published: May 5, 2024

Short-term operation is one of the most significant aspects power systems and planning it mainly includes resource scheduling including renewable non-renewable energy sources. The mentioned problem modeled as an optimization with or more objectives depending upon priorities decision maker (system operator) several equality inequality constraints. In this respect, paper proposes a short-term operational model for hydrothermal in presence wind generation pumped-hydro storage (PHS) units. formulated single-objective that aims to minimize total operating cost fuel thermal has been comprehensively investigated through five case studies where first study used sake validation. Then, other assessed impacts generation, PHS unit, uncertainty on problem. are follows: Case 1: (STH) which cost. 2: Deterministic hydrothermal-wind (STHTW) 3: Stochastic wind-hydro-thermal seeks taking into consideration generation. 4: unit minimization objective function. 5: evaluate impact It noteworthy three have using non-linear programming (NLP) solved CONOPT solver GAMS. 4 5 presented mixed-integer (MINLP) DICOPT A sensitivity analysis also carried out assess system's performance different loading conditions. amounts load demand were evaluated results discussed.

Language: Английский

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A Brief Review of Recent Research on Reversible Francis Pump Turbines in Pumped Storage Plants

Energies, Journal Year: 2025, Volume and Issue: 18(2), P. 394 - 394

Published: Jan. 17, 2025

As the core for energy conversion in pumped storage plants, pump turbine is also a key component process of building clean power grid, owing to its fast and accurate load regulation. This paper introduces current status research development turbines from perspectives significance, design optimization, operational performance, advanced methods, etc. Internal external characteristics such as transient flow evolution, structural vibration, flow-induced noise, etc., not only reflect performance (hydraulic, cavitation, sediment abrasion, stability etc.) but directly affect safe efficient operation system. It worth mentioning that space-time evolution internal an emerging direction, results which can be used predict conditions turbines. Moreover, application intelligent condition monitoring fault diagnosis aim prevent failures accidents plants.

Language: Английский

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Common Failures in Hydraulic Kaplan Turbine Blades and Practical Solutions

Materials, Journal Year: 2023, Volume and Issue: 16(9), P. 3303 - 3303

Published: April 23, 2023

Kaplan turbines, as one of the well-known hydraulic are generally utilized worldwide for low-head and high-flow conditions. Any failure in each turbine components can result long-term downtime high repair costs. In a particular case, if other parts damaged due to impact broken blades (e.g., main shaft turbine), whole power plant may be shut down. On hand, further research on primary causes failures turbines help improve present evaluation methodologies plants. Hence, objective this paper is major prevent excessive damage equipment provide practical solutions them. general, mainly subjected both Internal Object Damage (IOD) Foreign (FOD). Accordingly, presents state-of-the-art review related material physical defects, deficiencies design, deficits manufacturing assembly processes, corrosion failures, fatigue failure, cavitation wear, types hydro hydro-abrasive problems, hydro-erosion problems. Eventually, authors have attempted discuss hints nanostructured coatings) damages performance turbines.

Language: Английский

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Configuration mapping of thermally integrated pumped thermal energy storage system

Energy Conversion and Management, Journal Year: 2023, Volume and Issue: 294, P. 117561 - 117561

Published: Aug. 23, 2023

Language: Английский

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Energy storage techniques, applications, and recent trends: A sustainable solution for power storage

MRS Energy & Sustainability, Journal Year: 2023, Volume and Issue: 10(2), P. 261 - 276

Published: Sept. 19, 2023

Language: Английский

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Spatial-temporal evolution and pressure fluctuation characteristics of the combined submerged vortex in a closed pump sump

Physics of Fluids, Journal Year: 2023, Volume and Issue: 35(6)

Published: June 1, 2023

Following the retrofit of pump sump, there is a high risk inducing Combined Submerged Vortex (CSV), which consists roof-attached vortex (RAV) and floor-attached (FAV). This formation can lead to irregular pressure fluctuations, adversely affecting unit's performance compromising stability energy conversion. study aims investigate spatiotemporal evolution CSV its associated fluctuation characteristics in closed sump. High-speed visualization tests are conducted on transparent closed-loop test rig. The findings demonstrate that be divided into three stages: developing, competing, collapsing. competing stage, particular, has significant impact FAV. During period, dominant low frequencies induced by RAV FAV 0.24 0.13 Hz, respectively, with exhibiting higher intensity than RAV. regions coherence between primarily concentrated within low-frequency range 0.25–2 signals exhibit multiple phase differences. Furthermore, identification criterion for sump proposed based Continuous Wavelet Transform.

Language: Английский

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The Optimal Design of a Hybrid Solar PV/Wind/Hydrogen/Lithium Battery for the Replacement of a Heavy Fuel Oil Thermal Power Plant

Sustainability, Journal Year: 2023, Volume and Issue: 15(15), P. 11510 - 11510

Published: July 25, 2023

Renewable energies are clean alternatives to the highly polluting fossil fuels that still used in power generation sector. The goal of this research was look into replacing a Heavy Fuel Oil (HFO) thermal plant Limbe, southwest Cameroon, with hybrid photovoltaic (PV) and wind combined storage system. Lithium batteries hydrogen associated fuel cells make up total cost (TC) project over its lifetime minimized order achieve optimal sizing components. To ensure reliability new plant, criterion measuring loss supply probability (LPSP) implemented as constraint. Moth Flame Optimization (MFO), Improved Grey Wolf Optimizer (I-GWO), Multi-Verse (MVO), African Vulture Algorithm (AVOA) were solve single-objective optimization problem. techniques entailed development mathematical models components, hourly weather data for selected site output replaced serving input data. All four algorithms produced acceptable reasonably comparable results. However, terms proportion, obtained MFO algorithm 0.32%, 0.40%, 0.63% lower than costs I-GWO, MVO, AVOA algorithms, respectively. Finally, effect type coupled PV systems on overall assessed. meta-heuristic compare results PV–Wind–Hydrogen–Lithium Battery, PV–Wind–Hydrogen, PV–Wind–Lithium Battery scenarios. scenario had lowest cost. This scenario’s 2.40% 18% PV–Wind–Hydrogen

Language: Английский

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