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Energies, Volume 19, Issue 16

2026 August-2 - 237 articles

Cover Story: Photovoltaic (PV)/biomass systems use dispatchable energy from biomass to counteract the intermittent nature of solar energy. Taking into account the gaps in the scientific literature, this article aims to present information on PV/biomass technologies and the environmental profiles of different feedstocks for biogas production, split into two parts. The first one highlights critical factors identified in the scientific literature. The second part presents the eco-profiles of three feedstocks. The methodology is based on literature review and Life-Cycle Assessment (LCA). The results show that: (1) the majority of the prior research focused on techno-economic analyses and design/modelling; (2) among the feedstocks examined (manure, waste cooking oil and grass; case study: the second part of this article), in most categories, animal waste has the largest ecological footprint. View this paper
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Articles (237)

  • Article
  • Open Access
271 Views
68 Pages

21 August 2026

With the continued advancement of low-carbon campus transformation and the increasing penetration of renewable energy, campus integrated energy systems have become key infrastructure for green campus development. However, the highly random nature of...

(This article belongs to the Special Issue Next-Generation Smart Energy Systems for Sustainable and Decarbonized Energy Infrastructures)
  • Article
  • Open Access
223 Views
35 Pages

21 August 2026

This paper presents a modified two-degree-of-freedom wave buoy with an embedded tunable magnetic-spring electromagnetic energy harvester. The proposed device is modeled as a branched kinematic chain composed of a rotational–rotational buoy mech...

  • Article
  • Open Access
224 Views
24 Pages

21 August 2026

UAV-based insulator detection is challenging because insulators often occupy small regions of aerial images and appear against complex backgrounds, while subtle local features may be lost during feature extraction and down-sampling. Moreover, practic...

(This article belongs to the Section F1: Electrical Power System)
  • Article
  • Open Access
331 Views
30 Pages

Segmented Finite Line Source Analysis of Mid-Deep UBHE with Geothermal Gradient and Stratification

  • Zhigang Shi,
  • Zheng Xu,
  • Lin Zhang,
  • Shiwei Xia,
  • Chaozheng Wang,
  • Jin Tu and
  • Peng He

21 August 2026

This study develops an analytical model for a mid-deep U-shaped borehole heat exchanger (UBHE) based on the segmented finite line source method, integrating geothermal gradient, five-layer geological stratification, and groundwater seepage within a u...

  • Article
  • Open Access
337 Views
37 Pages

Power and Fatigue–Load Assessment of Static Wake Steering in a Floating Wind Farm with 15 MW Turbines

  • Majid Ebrahimi,
  • Federico Bellini,
  • Alessandro Fontanella,
  • Sara Muggiasca and
  • Marco Belloli

21 August 2026

Static wake steering can increase wind-farm power production, but its application to floating offshore wind farms requires assessment of the coupled wake, platform, structural, and station-keeping response. This study evaluates whether power-maximizi...

(This article belongs to the Special Issue Latest Challenges in Modelling and Control of Wind Turbines: Aerodynamics, Structural Dynamics, Hydrodynamics and Inflow Effects)
  • Article
  • Open Access
554 Views
50 Pages

An Integrated Stochastic Decision-Support Framework: Hybrid Commercialization of Marginal Dry Gas Wells

  • Juan Rogelio Rodríguez-Velázquez,
  • Omar Gustavo Alvarado-Mancilla,
  • Eduardo Morales-Sánchez,
  • Jonás Velasco-Álvarez,
  • Rubén Vázquez-Medina and
  • Daniel Aguilar-Torres

21 August 2026

Natural gas production from mature fields is progressively shifting toward low-rate wells operating near their economic limit, creating challenges for long-term asset management. This study proposes an integrated stochastic decision-support framework...

  • Article
  • Open Access
233 Views
27 Pages

21 August 2026

Modern energy systems, including those supporting transportation electrification, are increasingly exposed to volatile market conditions and external events. Effective decision-making therefore requires the integration of structured operational data...

(This article belongs to the Topic Intelligent Modeling, Predictive Control, and Decision-Making for Multi-Energy Transportation Systems)
  • Article
  • Open Access
304 Views
23 Pages

21 August 2026

Integrated electricity–gas–heat systems require coordinated scheduling while limiting data sharing and representing network constraints. This paper develops a day-ahead model incorporating reactive power, voltage magnitudes, network losse...

(This article belongs to the Section F: Electrical Engineering)
  • Article
  • Open Access
296 Views
32 Pages

Surface Hydraulic Fracturing with L-Shaped Wells for Rock Burst Prevention in Hard Roof Key Strata of Deep Coal Mines

  • Weixin Zhang,
  • Hailong Xiangli,
  • Hongli Song,
  • Jianxi Ren,
  • Jingkun Li and
  • Yongtao Zhang

21 August 2026

Targeting the rock burst hazard induced by the hard roof key stratum during deep mining at the Mengcun Coal Mine in the Binchang mining area, this study takes the No. 403109 working face as the engineering background and systematically investigates t...

  • Article
  • Open Access
329 Views
31 Pages

Numerical Study on the Energy-Harvesting Performance of a Flapping Foil Under Vortical-Gust Encounters

  • Shihui Wu,
  • Xiaoyang Wang,
  • Hua Qiang,
  • Zhixu Zhou,
  • Shaofeng Wu,
  • Shuangbao Luo and
  • Li Wang

21 August 2026

Coherent vortices alter flapping-foil energy harvesting, but wake-generated vortex properties and timing are coupled to upstream-body kinematics. We use two-dimensional immersed boundary–lattice Boltzmann simulations of a prescribed heaving&nda...

(This article belongs to the Special Issue Development of Energy Harvesting Systems and Methods from Uncommon Sources: 2nd Edition)
  • Article
  • Open Access
329 Views
21 Pages

Basin-Scale Screening of Spillway-Related Total Dissolved Gas Generation Potential Under Intermittent Hydropower Operation in the Brazilian Amazon and Tocantins–Araguaia Basins

  • Guilherme Martinez Figueiredo Ferraz,
  • Dieimys Santos Ribeiro,
  • Guilherme Sousa Bastos,
  • Walker Matheus Ferreira da Silva,
  • Andrey Leonardo Fagundes de Castro,
  • Lorena Bettinelli Nogueira,
  • Juliano Mafra Neves,
  • Liandro Rosa,
  • Bruno Correia Macedo and
  • Carlos Barreira Martinez
  • + 1 author

21 August 2026

As variable renewable generation grows, intermittent dispatch of run-of-river hydropower plants may transfer required environmental-flow releases from turbines to spillways, creating conditions that favor total dissolved gas (TDG) supersaturation and...

(This article belongs to the Special Issue Flexibility Regulation and Operational Optimization of New-Type Power Systems)
  • Article
  • Open Access
378 Views
23 Pages

A Numerical–Textual Dual-Channel Forecasting Framework for Short-Term Load Forecasting

  • Xiaohu Xin,
  • Jing Xu,
  • Xin Wang,
  • Weili Xu,
  • Yang Yue,
  • Chengshuai Wang,
  • Junwei Yang and
  • Bing Sun

21 August 2026

Short-term load forecasting underpins power-system dispatching, yet classical models degrade when historical samples are scarce. This paper proposes NTSForecast, a numerical–textual dual-channel framework: a trainable multi-layer perceptron enc...

(This article belongs to the Topic Advanced Forecasting Methods for Sustainable Power Systems)
  • Article
  • Open Access
262 Views
21 Pages

Comparison Between Transportation and Disjunctive DC Models in the Transmission Expansion Planning

  • Mateus de Oliveira Vaz,
  • Murilo E. C. Bento and
  • Gustavo da Silva Viana

21 August 2026

This paper presents a comparative analysis of two models for direct current (DC) networks used in transmission expansion planning (TEP) problems. These models incorporate distinct sets of constraints and have different levels of detail: the transport...

(This article belongs to the Section F1: Electrical Power System)
  • Article
  • Open Access
315 Views
32 Pages

21 August 2026

The use of synthetic fuels produced from CO2 requires efficient production technologies and evaluation of their application in energy systems. This study combines experimental tests of a dual-fuel engine powered by n-propanol and diesel fuel with mod...

(This article belongs to the Special Issue Renewable Energy-Driven Production of Synthetic Fuels: Technologies, Systems and Sustainability)
  • Editorial
  • Open Access
313 Views
4 Pages

21 August 2026

One of society’s most pressing goals is the transition toward a circular economy, in which governments and industries alike are prioritizing the minimization of waste through the maximization of resource use [...]

(This article belongs to the Special Issue From Waste to Energy: Towards Resource Recovery Optimization from Waste)
  • Article
  • Open Access
359 Views
23 Pages

21 August 2026

Photovoltaic parks support climate change mitigation by generating low-emission electricity. However, their environmental impacts strongly depend on site features and proximity to environmentally sensitive areas. The aim of the present paper is to de...

(This article belongs to the Section B: Energy and Environment)
  • Article
  • Open Access
302 Views
21 Pages

21 August 2026

The jump height of overhead transmission lines after ice shedding is closely related to electrical clearance, and structural safety. For different conductor parameters, span lengths, horizontal stress, and icing conditions, transient finite-element a...

(This article belongs to the Section F: Electrical Engineering)
  • Article
  • Open Access
350 Views
18 Pages

20 August 2026

Despite rising foreign direct investment (FDI), Sub-Saharan Africa continues to experience inadequate energy infrastructure and weak sustainable development outcomes, suggesting that investment alone is insufficient to generate long-term development...

  • Article
  • Open Access
1 Citations
513 Views
22 Pages

20 August 2026

Wave energy in short-fetch, semi-enclosed seas depends on how closely the response of a converter matches locally generated, short-period waves. This study makes that match explicit for the Black Sea, the Sea of Marmara, the Aegean, and the Eastern M...

(This article belongs to the Section A3: Wind, Wave and Tidal Energy)
  • Article
  • Open Access
262 Views
29 Pages

Novel Performance of T-S Fuzzy Power System Based on a New Slack Lemma and an Optimization Algorithm

  • Ziqiao Tang,
  • Zhixiang Li,
  • Yu Hu,
  • Can Zhao,
  • Won-Ho Kim,
  • Haiyin Qing and
  • Tao Liu

20 August 2026

This paper studies performance analysis and load frequency control (LFC) for a Takagi–Sugeno (T-S) fuzzy power system equipped with an energy storage unit. A corresponding T-S fuzzy representation of the system is constructed. Subsequently, a n...

(This article belongs to the Section F1: Electrical Power System)
  • Article
  • Open Access
247 Views
24 Pages

20 August 2026

The proliferation of inverter-based resources (IBRs) and energy storage systems in power grids has led to a decline in the short-circuit ratio (SCR) and reduced fault current magnitudes, compromising the reliability of conventional overcurrent relays...

(This article belongs to the Section F: Electrical Engineering)
  • Article
  • Open Access
267 Views
27 Pages

20 August 2026

The rapid expansion of residential photovoltaics (PV) increases the need for long-term evidence on system performance under real operating conditions. This study compared four grid-connected rooftop PV microinstallations (4.69–5.04 kWp) located...

(This article belongs to the Section A2: Solar Energy and Photovoltaic Systems)
  • Article
  • Open Access
290 Views
20 Pages

Geometrical Effects of Flow Reversers on the Thermo-Hydraulic Performance of a Rotating Horizontal Spiral Heat Exchanger

  • Mohammad Mobin Bakhshi,
  • Faezeh Ahangar,
  • Mohammadreza Abbaspour,
  • Huixuan Wu,
  • Akshay Anand and
  • Ganesh Desai Ramakrishna

20 August 2026

This research numerically evaluates the effects of various geometric parameters on the optimization of flow reversers on a rotating spiral heat exchanger utilizing computational fluid dynamics. There were three important geometric parameters investig...

(This article belongs to the Section J: Thermal Management)
  • Article
  • Open Access
251 Views
17 Pages

20 August 2026

Currently, insulation faults in the DC system of photovoltaic (PV) power stations are handled by a full shutdown strategy of inverters, and fault branch localization relies on manual inspection, resulting in low efficiency and poor accuracy, leading...

(This article belongs to the Section F1: Electrical Power System)
  • Article
  • Open Access
274 Views
22 Pages

Phase-Adaptive Constrained Active Sampling for Simulation-Verified Planning of Renewable Energy Bases

  • Jishuo Qin,
  • Yahan Dong,
  • Fan Li,
  • Jian Meng,
  • Jingyan Liu and
  • Taikun Tao

20 August 2026

Planning renewable energy bases with chronological source-grid-storage simulation makes exhaustive capacity screening impractical. This study develops a phase-adaptive constrained active-sampling framework whose core mechanism is a simulator-verified...

(This article belongs to the Section F1: Electrical Power System)
  • Article
  • Open Access
330 Views
32 Pages

20 August 2026

The article explores the evolution of energy transition research through a bibliometric co-occurrence analysis of author keywords extracted from 146 scientific publications. The analysis reveals a shift from the technical aspects of energy systems an...

(This article belongs to the Section C: Energy Economics and Policy)
  • Article
  • Open Access
342 Views
18 Pages

20 August 2026

Current research on photovoltaic–storage–charging (PSC) systems operating in market-oriented environments mainly focuses on individual service types, such as charging services or ancillary services, without fully considering the interacti...

(This article belongs to the Special Issue Application of Swarm Intelligence for Multi-Energy Virtual Power Plants—2nd Edition)
  • Article
  • Open Access
279 Views
37 Pages

20 August 2026

As data centers become major and schedulable loads of the new power system, connecting them to multiple microgrids offers a promising route to absorb local renewable energy through cross-domain coordination. However, when the microgrids belong to com...

  • Article
  • Open Access
296 Views
20 Pages

20 August 2026

This monograph synthesizes the current state of knowledge on mathematical models and wind turbine (WT) modeling methods, in particular in the field of implementation of wind turbine emulators (WTE). The areas covered include the methods used to creat...

(This article belongs to the Section A3: Wind, Wave and Tidal Energy)
  • Article
  • Open Access
297 Views
26 Pages

20 August 2026

Wind power is central to global decarbonization, but its expansion depends not only on technological capacity but also on social embedding. Co-creation is often promoted as a way to enhance public participation and legitimacy, yet existing research d...

(This article belongs to the Section C: Energy Economics and Policy)
  • Article
  • Open Access
287 Views
18 Pages

20 August 2026

In response to rising global energy demand and sustainability targets, assessing the energy-related efficiency of agricultural products has become a critical issue. Sweet sorghum is widely recognized as a promising energy crop for sustainable biofuel...

(This article belongs to the Special Issue Renewable Energy Integration into Agricultural and Food Engineering)
  • Article
  • Open Access
312 Views
29 Pages

20 August 2026

Traditional petroleum coke-based porous carbons suffer from low specific surface area, insufficient surface active sites, and inferior rate and cycling performance. Herein, a series of sulfur/fluorine-co-doped hierarchical porous carbon (S+F-PC) cath...

  • Article
  • Open Access
309 Views
18 Pages

A GCC Evidence-Calibrated Nonlinear Decision Framework for Photovoltaic Technology Selection Under Coupled Desert Environmental Stress

  • Ghassan Malkawi,
  • Ahmed Elsayed,
  • Azmi Alazzam,
  • Asem Omari,
  • Said Badreddine,
  • Bakeel Hussein,
  • Mohammed Alhagyan and
  • Abdelrahman Altigani

20 August 2026

Photovoltaic technology selection in Gulf Cooperation Council (GCC) desert environments is affected by coupled dust, thermal, ultraviolet (UV), humidity, and salinity stresses, which are not fully represented by static weighting and additive multi-cr...

(This article belongs to the Special Issue Sustainable Technologies in Solar Thermal and PV Systems Optimization and Application)
  • Article
  • Open Access
331 Views
29 Pages

20 August 2026

Accurate forecasting of electricity prices is essential for efficient operation and decision-making in deregulated power markets, particularly in the Indian electricity market, characterized by high volatility and dynamic pricing. This study presents...

(This article belongs to the Section A1: Smart Grids and Microgrids)
  • Article
  • Open Access
274 Views
17 Pages

Inertia and Frequency Stability Assessment for Renewable-Rich Distribution Feeders

  • Samuel A. Ibikunle,
  • Oyeniyi Akeem Alimi and
  • Evans E. Ojo

20 August 2026

This study evaluates a disturbance-informed, planning-level workflow for assessing steady-state feeder performance and post-disturbance frequency security in renewable-rich distribution networks. The workflow links feeder operation in DIgSILENT Power...

(This article belongs to the Section F1: Electrical Power System)
  • Article
  • Open Access
292 Views
22 Pages

20 August 2026

Enhancing the resilience of renewable energy enterprises is crucial for advancing the energy revolution and building a clean, low-carbon, safe, and efficient energy system. Against the background of an accelerating energy transition and rising extern...

(This article belongs to the Special Issue Sustainable Energy Transition: Economic Challenges and Opportunities)
  • Article
  • Open Access
343 Views
30 Pages

20 August 2026

This paper examines how the body of research and innovation on electric cooking for low- and middle-income countries has evolved to the extent that electric cooking can now be argued to have the potential to influence energy system performance. Metho...

  • Article
  • Open Access
284 Views
17 Pages

RBF-SVR Significantly Outperforms Tree-Based Models for Weather-Sensitive Air Conditioning Load Prediction Under Extreme Conditions

  • Chuan Long,
  • Xinting Yang,
  • Yunche Su,
  • Fang Liu,
  • Yang Liu,
  • Ruiguang Ma,
  • Wenhua Zhang and
  • Haochen Gong

20 August 2026

Accurate air conditioning (AC) load prediction under extreme weather conditions is critical for power grid stability and energy management. While tree-based ensemble methods such as XGBoost, LightGBM, and Gradient Boosting have become the dominant pa...

  • Article
  • Open Access
384 Views
27 Pages

Real-Time Residential Energy Optimization in Smart Grids: A Deep Reinforcement Learning Framework for Demand-Side Management

  • Chittemma Yerra,
  • Kiran Teeparthi,
  • Ramavathu Srinu Naik,
  • Yellapragada Venkata Pavan Kumar and
  • Rammohan Mallipeddi

19 August 2026

The integration of photovoltaic generation, battery storage, electric vehicles, smart appliances, and dynamic electricity pricing has made residential energy management a challenging real-time optimization problem. Conventional demand-side management...

  • Review
  • Open Access
594 Views
54 Pages

19 August 2026

Power Flow (PF) analysis is a fundamental tool in distribution systems since it determines the steady-state operating point for specified input conditions. Modern distribution networks face high distributed energy resource (DER) penetration and varia...

(This article belongs to the Section F1: Electrical Power System)
  • Article
  • Open Access
389 Views
28 Pages

Time-Lag-Aware Redundancy-Constrained Feature Selection and VMD–LSTM Framework for Short-Term Load Forecasting

  • Yuesong Zang,
  • Zenghai Zhao,
  • Jie Gao,
  • Xu Wang,
  • Shuo Li,
  • Qian Ma,
  • Mengmeng Liu and
  • Jia Wang

19 August 2026

In smart grids, accurate load forecasting is essential for maintaining the balance between supply and demand and ensuring the safe and stable operation of power systems. To address the strong nonstationarity of short-term load sequences, the lagged e...

(This article belongs to the Special Issue Application of Machine Learning in Modern Power Systems)
  • Article
  • Open Access
266 Views
17 Pages

19 August 2026

Against the backdrop of the dual-carbon goals, a new power system is undergoing rapid construction, and distributed renewable energy is being connected at high density to regional ring networks. This study deeply explores the impact of photovoltaic (...

(This article belongs to the Special Issue Intelligent Control and Management Systems for Energy-Efficient Buildings)
  • Article
  • Open Access
249 Views
40 Pages

Cavitation Assessment in Francis Turbines and Pumps-as-Turbines Using Machine Learning

  • Maciej Janiszkiewicz,
  • Israel Enema Ohiemi and
  • Aonghus McNabola

19 August 2026

Cavitation is an important factor limiting the performance and durability of hydraulic turbines. Computational fluid dynamics (CFD) provides access to local pressure and vapour-volume-fraction (VVF) fields, but its computational cost can limit the as...

(This article belongs to the Topic AI and Computational Methods for Modelling, Simulations and Optimizing of Advanced Systems: Innovations in Complexity, 2nd Edition)
  • Article
  • Open Access
301 Views
26 Pages

Privacy-Preserving Verification of Energy Performance Contracts: A Zero-Knowledge Proof Approach Within the FORTESIE Framework

  • Emilio Tereñes,
  • Sonia García,
  • Enrique López,
  • Andrés Berdasco,
  • Konstantinos Gombakis,
  • Konstantinos Alexakis and
  • Christos Kontzinos

19 August 2026

This paper presents an application of Zero-Knowledge Proofs (ZKPs) and blockchain for the monitoring and verification of Energy Performance Contracts (EPCs) within the FORTESIE project, addressing a gap that remains largely unexplored in the scientif...

(This article belongs to the Special Issue Digital Engineering for Future Smart Cities)
  • Article
  • Open Access
413 Views
21 Pages

19 August 2026

In recent years, high penetrations of inverter-based resources are posing significant challenges to the medium-voltage networks, in which protection schemes based on high fault currents and unidirectional power flow may not perform as expected. This...

(This article belongs to the Special Issue Planning, Operation and Management of Grid-Connected and Islanded Microgrids)
  • Article
  • Open Access
313 Views
24 Pages

19 August 2026

Partial shading conditions (PSCs) in photovoltaic (PV) systems generate multiple local maximum power points (LMPPs) and a single global maximum power point (GMPP) in the power–voltage (P–V) characteristics, challenging conventional maximu...

  • Article
  • Open Access
295 Views
43 Pages

Adaptive Non-Integer Frequency Control Design Based on EESC Optimization for CES-Integrated Multi-Microgrid

  • Essam H. Abdou,
  • Mohamed Ebeed,
  • Aisha F. Fareed,
  • Emad A. Mohamed,
  • Mokhtar Aly,
  • Abdelmageed M. Ali,
  • Kareem M. Metwally,
  • Abdallah Chanane and
  • Adel Agamy

19 August 2026

Recently, microgrid (MG) structures include a mix of renewable energy sources (RES) and conventional sources. At high levels of RES penetration, reduced inertia and frequency stability have been confirmed in several studies. Properly designed and str...

  • Review
  • Open Access
344 Views
44 Pages

Standardized Indices for the Assessment of Indoor Thermal Environments: Background, Application and Perspectives

  • Francesca Romana d’Ambrosio Alfano,
  • Boris Igor Palella and
  • Giuseppe Riccio

19 August 2026

In the broader context of ecological transition, it is essential to identify solutions that ensure indoor environmental quality encompassing thermal, visual, acoustic, and indoor air quality conditions to safeguard occupant health and well-being. The...

(This article belongs to the Topic Energy Systems in Buildings and Occupant Comfort)
  • Article
  • Open Access
328 Views
18 Pages

19 August 2026

The European Union’s climate policy promotes waste incineration as an alternative to landfilling. However, the continuous nature of waste generation, combined with seasonal variability in energy demand, leads to a mismatch between heat producti...

(This article belongs to the Special Issue Advanced Research in Geoenergy Storage and Conversion)
  • Article
  • Open Access
517 Views
31 Pages

19 August 2026

This study evaluates the economic feasibility of standalone Battery Energy Storage Systems (BESS) for energy arbitrage in the Portuguese day-ahead electricity market. A Mixed-Integer Linear Programming (MILP) model is developed to optimize the operat...

(This article belongs to the Special Issue Advancements in Energy Storage Technologies—2nd Edition)

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Energies - ISSN 1996-1073