OOIR: Observatory of International Research

Papers

(The H4-Index of Renewable Energy is 119. The table below lists those papers that are above that threshold based on CrossRef citation counts [max. 250 papers]. The publications cover those that have been published in the past four years, i.e., from 2021-09-01 to 2025-09-01.)

Article	Citations
Advances in thermal energy storage for renewable energies integration in the energy system	620
Analyzing convective heat transfer in combined solar chimneys: A theoretical and numerical study of key influencing parameters	474
Wake scaling of actuator discs in different aspect ratios	394
Corrigendum to “Tropho-metabolic transition during Chlorella sp. cultivation on synthesis of biodiesel” [Renew. Energy 98 (2016) 84–91]	353
Optimal phasing of tidal stream power around the British Isles and within the English Channel for green ammonia production	352
Synthesis and evaluation of bifunctional polymeric agent for improving cold flow properties and oxidation stability of diesel-biodiesel blends	320
Theoretical models for predicting ventilation performance of vertical solar chimneys in tunnels	292
Experimental study of floating wind turbine control on a TetraSub floater with tower velocity feedback gain	291
Increasing the capacity of pseudocapacitive WO3 auxiliary electrode for enhanced two-step decoupled acid water electrolysis	283
Editorial Board	275
WITHDRAWN: ANN and ML Based Modeling of InGaN/GaN p-i-n Solar Cells for Concentrator Photovoltaics	275
Calculation of the incidence angle modifier of a Linear Fresnel Collector: The proposed declination and zenith angle model compared to the biaxial factored approach	274
A novel oscillatory thermal response test method for efficient characterization of ground thermal properties: Methodology and data analysis	269
Experimental-data-based, easy-to-use product gas composition prediction of a commercial open-top gasifier based on commercially used properties of softwood chips	266
Pivotal MoOx-decorated Ru/C with a monomeric structure boosts the room temperature and low-pressure hydrogenation of levulinic acid to γ−valerolactone	265
Impact analysis of COVID-19 pandemic on the future green power sector: A case study in the Netherlands	262
Performance assessment of a Triple Coaxial-Cylinder Wave-Energy Converter (TCWEC)	261
Low-head hydropower as a reserve power source: A case study of Northeastern Illinois	246
Modeling and estimation of moisture transport properties of drying of potential Amazon biomass for renewable energy: Application of the two-compartment approach and diffusive models with constant or m	245
Research on stacking ensemble method for day-ahead ultra-short-term prediction of photovoltaic power	239
Ultraviolet–visible–near-infrared irradiation responsive high-entropy layered double hydroxides for on-demand hydrogen evolution reaction via sodium borohydride hydrolysis	236
The Spatiotemporal exploration of intercity transport energy efficiency in the mainland of China on the basis of improved stochastic frontier modelling	236
Sustainable solution to the critical challenges of an oceanic wave farm for maximizing power generation	233
New trilobular geometry using advanced materials for experimentally validated enhanced heat transfer in shallow geothermal applications	229
Can copper and zinc replace a commercial trace element mixture in enhancing methane production from agricultural digestate post-processing?	227

Economic optima for buffers in direct reduction steelmaking under increasing shares of renewable hydrogen	215
Optimization of biomethane production from purified biowaste pyrolysis gas: A comparative techno-economic assessment	215
Experimental study on high-precision detection technology for the freezing front height in brine on a horizontal cold plate surface in cold regions	213
Modeling and stability investigation on the governor-turbine-hydraulic system with a ceiling-sloping tail tunnel	209
Assessing the performance and economic viability of solar home systems: A way forward towards clean energy exploration and consumption	206
Performance assessment of bifacial and monofacial PV systems on different types of soils in a low-latitude site	205
Benefits of establishing new energy consumption cities: Evidence from industrial enterprises sustainability	204
Multi-objective optimization of operation strategy in snow melting system for airfield runway using genetic algorithm: A case study in Beijing Daxing International Airport	202
Effects of length-to-diameter ratio, pinewood sawdust, and sodium lignosulfonate on quality of rice straw pellets produced via a flat die pellet mill	199
A granular multicriteria group decision making for renewable energy planning problems	197
Ultrasound-NATDES/DMSO system for corn straw biomass conversion into platform compounds	196
Spatial correlation network of renewable energy consumption and its influencing factors: Evidence from 31 Chinese provinces	195
Estimation of kinematic viscosity of biodiesel-diesel blends: Comparison among accuracy of intelligent and empirical paradigms	193
Energy communities in rural areas: The participatory case study of Vega de Valcarce, Spain	191
A study to investigate the energy recovery potential from different macromolecules of a low-lipid marine Tetraselmis sp. biomass through HTL process	190
Effect of angle of incidence on the optical-electrical-thermal performance of photovoltaic insulated glass units	185
Energetic, economic, environmental and climatic analysis of a solar combisystem for different consumption usages with PSI method ranking	185
Performance analysis of a concentrated direct absorption solar collector (DASC) with nanofluids using computational fluid dynamics and discrete ordinates radiation modelling (CFD-DORM)	185
Study on the operation of small rooftop wind turbines and its effect on the wind environment in blocks	184
Measuring regional variations and analyzing determinants for global renewable energy	180
Hybrid wind-solar energy potential modeling using ERA5 and solar irradiation data in google Earth Engine	178
The nexus between economic development and pollution in the European Union new member states. The role of renewable energy consumption	177
A novel ensemble machine learning approach for optimizing sustainability and green hydrogen production in hybrid renewable-based organic Rankine cycle-operated proton exchange membrane electrolyser sy	174
A new optimization approach considering demand response management and multistage energy storage: A novel perspective for Fujian Province	173
Investigation of poultry slaughterhouse waste stream to produce bio-fuel for internal utilization	172
The role of limonene in the branching of straight chains in low-octane hydrocarbons	171
Validations of a double U-tube borehole model and a seasonal solar thermal energy storage system model	171
WITHDRAWN: Nonlinear Kalman filters based rotor effective wind speed estimation: An experimental comparison	170
Design and optimization of a novel phase change photovoltaic thermal utilization structure for building envelope	170
Design of a 20 kWth gasification reactor for harnessing energy from rice husks	166
Site adaptation of global horizontal irradiance from the Copernicus Atmospheric Monitoring Service for radiation using supervised machine learning techniques	166
Strategic bidding for a hydro-wind-photovoltaic hybrid system considering the profit beyond forecast time	166
Numerical simulation of electricity generation potential through five vertical wells at Fengshun geothermal field in China	163
Unlocking the potentials using humidifier-dehumidifier for proton exchange membrane fuel cell waste heat recovery	162
Comparative study of grass pyrolysis over regenerated catalysts: Tyre ash, zeolite, and nickel-supported ash and zeolite	162
Experimental study on effects of compressor speed on a heat pump dryer system with auxiliary solar source	161
Effect of fracture backfill on the hydraulic fracturing behaviour of deep granite under high-temperature and high-pressure conditions: Implications for hot dry rock geothermal mining	161
A study on the characteristics and kinetic of co-catalytic pyrolysis with rape straw and ABS waste plastics	161
An optimization decision-making framework for the optimal operation strategy of pumped storage hydropower system under extreme conditions	156
Economic and sustainability prospects for wet waste valorization: The case for sustainable aviation fuel from arrested anaerobic digestion	156
Improvement of GH10 xylanase activity based on channel hindrance elimination strategy for better synergistic cellulase to enhance green bio-energy production	156
Global geothermal electricity potentials: A technical, economic, and thermal renewability assessment	155
3E thermodynamic modeling and optimization a novel of ARS-CPVT with the effect of inserting a turbulator in the solar collector	152
Uncertainty quantification analysis in the blade element momentum method	152
A sustainable biorefinery strategy: Conversion and fractionation in a facile biphasic system towards integrated lignocellulose valorizations	149
Parametric optimization of a novel solar concentrating photovoltaic-near field thermophotovoltaic hybrid system based on cascade utilization of full-spectrum solar energy	149
Highly fluorinated poly arylene ethers containing sulfonated naphthol pendants with improved proton conductivity as a polymer electrolyte for proton exchange membrane fuel cells	149
Solar drying of apple and orange waste: Evaluation of a new thermodynamic approach, and characterization analysis	148
Cyclic performance of coke oven gas - Steam reforming with assistance of steel slag derivates for high purity hydrogen production	148
A spatial cost-benefit-externality modelling framework for siting of variable renewable energy farms: A case in Bohol, Philippines	146

Effect of green technological innovation and financial development on green energy transition in N-11 countries: Evidence from the novel Method of Moments Quantile Regression	145
Evolving probabilistic modeling for long-term significant wave heights with a focus on extremes	145
Traveling wave turbine - An internal flow energy absorption mode based on the traveling wave motion	145
Electron deficiency modulates hydrogen adsorption strength of Ru single-atomic catalyst for efficient hydrogen evolution	145
Functionalized chitosan-derived porous carbon as a promising catalyst in one-pot conversion of soybean oil to biodiesel	143
Conceptual design of solar/geothermal hybrid system focusing on technical, economic and environmental parameters	143
Nonlinear modelling and adaptive control of smart rotor wind turbines	143
Global horizontal irradiance prediction model for multi-site fusion under different aerosol types	140
Emissions trading scheme and energy consumption and output structure: Evidence from China	140
Optimization and analysis of the deflector system for a bidirectional H-type hydrokinetic twin-turbine system	140
Performance analyses of supercritical carbon dioxide-based parabolic trough collectors with double-glazed receivers	140
Power consumption and oxygen transfer optimization for C5 sugar acid production in a gas-liquid stirred tank bioreactor using CFD-Taguchi method	139
Research progress in SO2 depolarized electrolysis at INET	139
Performance evaluation of a geothermal and solar-based multigeneration system and comparison with alternative case studies: Energy, exergy, and exergoeconomic aspects	138
A design-driven wind blade manufacturing model to identify opportunities to reduce wind blade costs	136
Statistical analysis of electricity supply deficits from renewable energy sources across an Alpine transect	136
Solar home systems adoption in Sub-Saharan African countries: Household economic and environmental benefits assessment	135
Transition towards ecological sustainability through fiscal decentralization, renewable energy and green investment in OECD countries	134
Research on productivity of stimulated natural gas hydrate reservoir	134
Performance investigation on an agricultural photovoltaic thermal system based on spectral separation	133
Numerical assessment and optimization of photovoltaic-based hydrogen-oxygen Co-production energy system: A machine learning and multi-objective strategy	133
A wind farm control strategy for frequency regulation reserve: Optimize wake loss and frequency support capability	133
A novel approach to optimize the positioning and measurement parameters in photovoltaic aerial inspections	133
Application of iron oxides modified volcanic rock in continuous phenol wastewater anaerobic treatment: Performance and underlying mechanisms	131
Improving the performance of solar photovoltaic thermal cells using jet impingement and phase change materials cooling technology	131
Energy, exergy, economic and environmental assessment of solar photovoltaic direct-drive refrigeration system for electronic device cooling	130
Optimization of hydrogen recirculation ejector for proton-exchange membrane fuel cells (PEMFC) systems considering non-equilibrium condensation	130
A novel vortex-based velocity sampling method for the actuator-line modeling of floating offshore wind turbines in windmill state	129
Pyrolysis behaviour, kinetics and thermodynamic data of hydrothermal carbonization–Treated pulp and paper mill sludge	129
Kinetic and characteristic investigations on the conversion of cellulose to 5-hydroxymethylfurfural in the mixed metal salt system	128
Derivation and verification of three-dimensional wake model of multiple wind turbines based on super-Gaussian function	128
Performance of a sedimentation tank for standing column wells coupled with geothermal heat pump systems	128
Enhancing the performance of a photovoltaic thermal system with phase change materials: Predictive modelling and evaluation using neural networks	127
Integration of renewable energy, environmental policy stringency, and climate technologies in realizing environmental sustainability: Evidence from OECD countries	126
The use of kaolin and dolomite bed additives as an agglomeration mitigation method for wheat straw and miscanthus biomass fuels in a pilot-scale fluidized bed combustor	125
International trade of green hydrogen, ammonia and methanol: Opportunities of China's subregions	125
Biosynthesis of biolubricant catalyzed by lipase B from Candida antarctica immobilized on nanocomposite of cashew apple bagasse lignin	124
Sustainable synthesis of bio-diesel and jet-fuel range hydrocarbons from poisonous Abrus Precatorius seed oil over MoO3-HPW/Ga-KIT-6	124
Standardized benchmark of historical compound wind and solar energy droughts across the Continental United States	124
Asymmetric role of renewable energy, green innovation, and globalization in deriving environmental sustainability: Evidence from top-10 polluted countries	124
Assessing the potential and complementary characteristics of China's solar and wind energy under climate change	123
Revolutionizing biodiesel with novel MWCNT-COOH@TiO2-ZnO nanocatalysts for enhanced transesterification and tribocorrosion resistance	123
Influence of water hammer effect on low frequency oscillation of grid-connected hydropower station system	121
Experimental investigation on direct expansion solar-air source heat pump for water heating application	121
A comparative study on the performance of ice-source heat pumps versus other heat source heat pumps: A case study in the UK	119
Cooperative economic dispatch of EV-HV coupled electric-hydrogen integrated energy system considering V2G response and carbon trading	119
Reaction mechanisms and hydrogen production in the thermal decomposition of simple carboxylic acids in O2/H2O environments	119
Evaluating the energy-exergy-economy-environment performance of the biomass-photovoltaic-hydrogen integrated energy system based on hybrid multi-criterion decision-making model	119