OOIR: Observatory of International Research

Papers

(The H4-Index of Renewable Energy is 120. 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 2021-06-01 to 2025-06-01.)

Article	Citations
Advances in thermal energy storage for renewable energies integration in the energy system	565
Analyzing convective heat transfer in combined solar chimneys: A theoretical and numerical study of key influencing parameters	443
Wake scaling of actuator discs in different aspect ratios	438
Corrigendum to “Tropho-metabolic transition during Chlorella sp. cultivation on synthesis of biodiesel” [Renew. Energy 98 (2016) 84–91]	380
Corrigendum to “A novel environmental contour method for predicting long-term extreme wave conditions” [Renew. Energy 162 (2020) 926–933]	321
Finding the most suitable existing irrigation dams for small hydropower development in Turkey: A GIS-Fuzzy logic tool	319
Optimal phasing of tidal stream power around the British Isles and within the English Channel for green ammonia production	298
Synthesis and evaluation of bifunctional polymeric agent for improving cold flow properties and oxidation stability of diesel-biodiesel blends	291
Evolving probabilistic modeling for long-term significant wave heights with a focus on extremes	282
Aquatic weed Spirodela polyrhiza, a potential source for energy generation and other commodity chemicals production	279
Numerical evaluation of heat extraction performance in enhanced geothermal system considering rough-walled fractures	272
Editorial Board	266
Calculation of the incidence angle modifier of a Linear Fresnel Collector: The proposed declination and zenith angle model compared to the biaxial factored approach	265
Unveiling the potential of operating time in improving machine learning models’ performance for waste biomass gasification systems	258
Modelled annual thermal performance of a 50MWth refractory-lined particle-laden solar receiver operating above 1000°C	255
Assessment of regional-scale geothermal production based on a hybrid deep learning model: A case study of the southern Songliao Basin, China	252
A novel oscillatory thermal response test method for efficient characterization of ground thermal properties: Methodology and data analysis	249
Construction of reduced mechanism and prediction of the RON of toluene primary reference fuel/ethanol/diisobutylene	246
Experimental-data-based, easy-to-use product gas composition prediction of a commercial open-top gasifier based on commercially used properties of softwood chips	243
Pivotal MoOx-decorated Ru/C with a monomeric structure boosts the room temperature and low-pressure hydrogenation of levulinic acid to γ−valerolactone	242
Intelligent charge compression ignition combustion for range extender medium duty applications	238
Pyramid floating solar still with enhanced condensation surfaces operating under actual weather conditions	236
A multi-parameter estimation of layered rock-soil thermal properties of borehole heat exchanger in a stratified subsurface	235
Relationships between remarkable points in photovoltaic I–V curves	234
Acid-catalyzed co-hydrothermal carbonization of sewage sludge and mixed straws to produce high-quality solid fuel	222

The Spatiotemporal exploration of intercity transport energy efficiency in the mainland of China on the basis of improved stochastic frontier modelling	222
Optimization and analysis of the deflector system for a bidirectional H-type hydrokinetic twin-turbine system	219
Tailoring CoAl2O4 inversion degree-driven photocarrier separation and injection for photoelectrochemical water splitting	219
Impact analysis of COVID-19 pandemic on the future green power sector: A case study in the Netherlands	214
A comparative study on the performance of ice-source heat pumps versus other heat source heat pumps: A case study in the UK	209
Improvement of GH10 xylanase activity based on channel hindrance elimination strategy for better synergistic cellulase to enhance green bio-energy production	200
Lab- and pilot-scale anaerobic digestion of municipal bio-waste and potential of digestate for biogas upgrading sustained by microbial analysis	200
Experimental study on the effects of chemical or microwave treatment on the tensile strength of hot dry rock	198
Performance assessment of a Triple Coaxial-Cylinder Wave-Energy Converter (TCWEC)	193
Low-head hydropower as a reserve power source: A case study of Northeastern Illinois	192
Revolutionizing biodiesel with novel MWCNT-COOH@TiO2-ZnO nanocatalysts for enhanced transesterification and tribocorrosion resistance	191
Sustainable solution to the critical challenges of an oceanic wave farm for maximizing power generation	191
An optimization decision-making framework for the optimal operation strategy of pumped storage hydropower system under extreme conditions	190
A novel vortex-based velocity sampling method for the actuator-line modeling of floating offshore wind turbines in windmill state	189
Modeling of the evolution of the porous structure during a physical activation process for the production of activated biocarbon: A novel low conversion approach	183
Energetic and economic analysis of a novel concentrating solar air heater using linear Fresnel collector for industrial process heat	182
Innovative passive cooling of photovoltaic panel using loop heat pipe technology with passive daytime radiative cooling	181
3E thermodynamic modeling and optimization a novel of ARS-CPVT with the effect of inserting a turbulator in the solar collector	179
Numerical investigation on the dynamic response characteristics of a thermoelectric generator module under transient temperature excitations	179
New trilobular geometry using advanced materials for experimentally validated enhanced heat transfer in shallow geothermal applications	176
Actuator fault tolerant offshore wind turbine load mitigation control	175
Can copper and zinc replace a commercial trace element mixture in enhancing methane production from agricultural digestate post-processing?	174
Optimization of biomethane production from purified biowaste pyrolysis gas: A comparative techno-economic assessment	172
A novel approach to optimize the positioning and measurement parameters in photovoltaic aerial inspections	170
Energetic, economic, environmental and climatic analysis of a solar combisystem for different consumption usages with PSI method ranking	166
A sustainable biorefinery strategy: Conversion and fractionation in a facile biphasic system towards integrated lignocellulose valorizations	165
Triticale and sorghum as feedstock for bioethanol production via consolidated bioprocessing	163
Research on stacking ensemble method for day-ahead ultra-short-term prediction of photovoltaic power	161
Experimental study on high-precision detection technology for the freezing front height in brine on a horizontal cold plate surface in cold regions	160
Economic optima for buffers in direct reduction steelmaking under increasing shares of renewable hydrogen	160
Nonlinear modelling and adaptive control of smart rotor wind turbines	158
Highly fluorinated poly arylene ethers containing sulfonated naphthol pendants with improved proton conductivity as a polymer electrolyte for proton exchange membrane fuel cells	158
Modeling and stability investigation on the governor-turbine-hydraulic system with a ceiling-sloping tail tunnel	158
Assessing the performance and economic viability of solar home systems: A way forward towards clean energy exploration and consumption	157
The pathway toward pollution mitigation in EU28 region: Does hydropower growth make a difference?	156
Experimental study of floating wind turbine control on a TetraSub floater with tower velocity feedback gain	155
Performance assessment of bifacial and monofacial PV systems on different types of soils in a low-latitude site	154
Benefits of establishing new energy consumption cities: Evidence from industrial enterprises sustainability	154
Traveling wave turbine - An internal flow energy absorption mode based on the traveling wave motion	153
Global horizontal irradiance prediction model for multi-site fusion under different aerosol types	152
Enhanced ethanol production from lignocellulosic hydrolysates by Thermoanaerobacterium aotearoense SCUT27/ΔargR1864 with improved lignocellulose-derived inhibitors tolerance	151
Power consumption and oxygen transfer optimization for C5 sugar acid production in a gas-liquid stirred tank bioreactor using CFD-Taguchi method	150
Energy, exergy, economic and environmental assessment of solar photovoltaic direct-drive refrigeration system for electronic device cooling	150
Multi-objective optimization of operation strategy in snow melting system for airfield runway using genetic algorithm: A case study in Beijing Daxing International Airport	150
Evaluating the energy-exergy-economy-environment performance of the biomass-photovoltaic-hydrogen integrated energy system based on hybrid multi-criterion decision-making model	150
Effect of seepage condition in geological stratification on thermal response test analysis of borehole heat exchanger	149
The contribution of energy policies to green energy transition in the Asia-Pacific region	147
Kinetic and characteristic investigations on the conversion of cellulose to 5-hydroxymethylfurfural in the mixed metal salt system	145
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	144
A new optimization approach considering demand response management and multistage energy storage: A novel perspective for Fujian Province	144

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	142
Research progress in SO2 depolarized electrolysis at INET	142
Optimization of hydrogen recirculation ejector for proton-exchange membrane fuel cells (PEMFC) systems considering non-equilibrium condensation	139
Co-pyrolysis and co-combustion of orange peel and biomass blends: Kinetics, thermodynamic, and ANN application	139
Cooperative economic dispatch of EV-HV coupled electric-hydrogen integrated energy system considering V2G response and carbon trading	139
Synergistic effect of acid sites and a gallium-based modified meso-/microporous catalyst for the pyrolysis of biomass	139
Air supply subsystem efficiency optimization for fuel cell power system with layered control method	138
CFD and exergy analysis of subcritical/supercritical CO2 based naturally circulated solar thermal collector	138
Flow-induced pulsations in Francis turbines during startup - A consequence of an intermittent energy system	138
Investigation of poultry slaughterhouse waste stream to produce bio-fuel for internal utilization	135
Abnormal data cleaning for wind turbines by image segmentation based on active shape model and class uncertainty	134
Flash evaporation strategy of organic Rankine cycle for geothermal power performance enhancement: A case study	134
A design-driven wind blade manufacturing model to identify opportunities to reduce wind blade costs	134
Performance analyses of supercritical carbon dioxide-based parabolic trough collectors with double-glazed receivers	134
Validations of a double U-tube borehole model and a seasonal solar thermal energy storage system model	134
Structural health monitoring of tendons in a multibody floating offshore wind turbine under varying environmental and operating conditions	133
The role of limonene in the branching of straight chains in low-octane hydrocarbons	133
An Ocean Thermal Energy Conversion power plant: Advanced exergy analysis and experimental validation	133
Biodiesel production via simultaneous esterification and transesterification of Periplaneta americana oil with liquid lipase Eversa® transform 2.0	133
Sensitivity analysis of a vertical geothermal heat pump system in a hot dry climate	132
Financing renewable energy generation in SSA: Does financial integration matter?	132
Statistical analysis of electricity supply deficits from renewable energy sources across an Alpine transect	131
Design and optimization of a novel phase change photovoltaic thermal utilization structure for building envelope	131
WITHDRAWN: Nonlinear Kalman filters based rotor effective wind speed estimation: An experimental comparison	131
Parametric optimization of a novel solar concentrating photovoltaic-near field thermophotovoltaic hybrid system based on cascade utilization of full-spectrum solar energy	130
Site adaptation of global horizontal irradiance from the Copernicus Atmospheric Monitoring Service for radiation using supervised machine learning techniques	129
Design of a 20 kWth gasification reactor for harnessing energy from rice husks	129
Modeling and interpretation of geomagnetic data related to geothermal sources, Northwest of Delijan	129
A transient heat losses model for two-tank storage systems with molten salts	128
WITHDRAWN: ANN and ML Based Modeling of InGaN/GaN p-i-n Solar Cells for Concentrator Photovoltaics	128
Dual-combustion chamber cycle utilizing biomass and geothermal energy: A comprehensive economic analysis and multi-objective optimization for enhanced multi-generation	128
Mitigation of severe false data injection attacks (FDIAs) in marine current turbine (MCT) type 4 synchronous generator renewable energy using promoted backstepping method	128
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	128
Experimental investigation on direct expansion solar-air source heat pump for water heating application	127
The role of eco-innovations, trade openness, and human capital in sustainable renewable energy consumption: Evidence using CS-ARDL approach	126
New energy technology innovation and energy poverty alleviation in China	125
Knowledge Discovery of Injector Geometry Effects on Pelton Turbine Erosion: Approaches for Efficient High-Head Water Utilization	125
Enhancing the performance of a photovoltaic thermal system with phase change materials: Predictive modelling and evaluation using neural networks	124
Theoretical models for predicting ventilation performance of vertical solar chimneys in tunnels	124
Pyrolysis behaviour, kinetics and thermodynamic data of hydrothermal carbonization–Treated pulp and paper mill sludge	122
Integration of renewable energy, environmental policy stringency, and climate technologies in realizing environmental sustainability: Evidence from OECD countries	122
Functionalized chitosan-derived porous carbon as a promising catalyst in one-pot conversion of soybean oil to biodiesel	121
A study to investigate the energy recovery potential from different macromolecules of a low-lipid marine Tetraselmis sp. biomass through HTL process	121
Performance of a sedimentation tank for standing column wells coupled with geothermal heat pump systems	120
A feasibility study of operating a low static pressure head micro pelton turbine based on water hammer phenomenon	120
Effect of semi-transparent a-Si PV glazing within double-skin façades on visual and energy performances under the UK climate condition	120