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 2021-08-01 to 2025-08-01.)

Article	Citations
Advances in thermal energy storage for renewable energies integration in the energy system	603
Analyzing convective heat transfer in combined solar chimneys: A theoretical and numerical study of key influencing parameters	466
Wake scaling of actuator discs in different aspect ratios	456
Corrigendum to “Tropho-metabolic transition during Chlorella sp. cultivation on synthesis of biodiesel” [Renew. Energy 98 (2016) 84–91]	391
Optimal phasing of tidal stream power around the British Isles and within the English Channel for green ammonia production	346
Synthesis and evaluation of bifunctional polymeric agent for improving cold flow properties and oxidation stability of diesel-biodiesel blends	341
Theoretical models for predicting ventilation performance of vertical solar chimneys in tunnels	314
Tidal stream energy potential in the Shannon Estuary	289
CFD and exergy analysis of subcritical/supercritical CO2 based naturally circulated solar thermal collector	283
A robust I–V curve correction procedure for degraded photovoltaic modules	275
Experimental study of floating wind turbine control on a TetraSub floater with tower velocity feedback gain	272
Increasing the capacity of pseudocapacitive WO3 auxiliary electrode for enhanced two-step decoupled acid water electrolysis	271
WITHDRAWN: ANN and ML Based Modeling of InGaN/GaN p-i-n Solar Cells for Concentrator Photovoltaics	269
Aquatic weed Spirodela polyrhiza, a potential source for energy generation and other commodity chemicals production	264
Editorial Board	260
Calculation of the incidence angle modifier of a Linear Fresnel Collector: The proposed declination and zenith angle model compared to the biaxial factored approach	257
Modelled annual thermal performance of a 50MWth refractory-lined particle-laden solar receiver operating above 1000°C	257
Assessment of regional-scale geothermal production based on a hybrid deep learning model: A case study of the southern Songliao Basin, China	256
A novel oscillatory thermal response test method for efficient characterization of ground thermal properties: Methodology and data analysis	252
Experimental-data-based, easy-to-use product gas composition prediction of a commercial open-top gasifier based on commercially used properties of softwood chips	241
Pivotal MoOx-decorated Ru/C with a monomeric structure boosts the room temperature and low-pressure hydrogenation of levulinic acid to γ−valerolactone	238
Intelligent charge compression ignition combustion for range extender medium duty applications	230
Relationships between remarkable points in photovoltaic I–V curves	230
Impact analysis of COVID-19 pandemic on the future green power sector: A case study in the Netherlands	229
Performance assessment of a Triple Coaxial-Cylinder Wave-Energy Converter (TCWEC)	225

Low-head hydropower as a reserve power source: A case study of Northeastern Illinois	222
Research on productivity of stimulated natural gas hydrate reservoir	218
RETRACTED: Method of Four Moments Mixture-A new approach for parametric estimation of Weibull Probability Distribution for wind potential estimation applications	212
Concentration performance of solar collector integrated compound parabolic concentrator and flat microchannel tube with tracking system	209
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	204
Research on stacking ensemble method for day-ahead ultra-short-term prediction of photovoltaic power	203
Assessing the potential and complementary characteristics of China's solar and wind energy under climate change	200
Ultraviolet–visible–near-infrared irradiation responsive high-entropy layered double hydroxides for on-demand hydrogen evolution reaction via sodium borohydride hydrolysis	199
Unveiling the potential of operating time in improving machine learning models’ performance for waste biomass gasification systems	198
A real options approach to renewable energy module end-of-life decisions under multiple uncertainties: Application to PV and wind in China	195
The Spatiotemporal exploration of intercity transport energy efficiency in the mainland of China on the basis of improved stochastic frontier modelling	194
Sustainable solution to the critical challenges of an oceanic wave farm for maximizing power generation	193
Can copper and zinc replace a commercial trace element mixture in enhancing methane production from agricultural digestate post-processing?	190
New trilobular geometry using advanced materials for experimentally validated enhanced heat transfer in shallow geothermal applications	190
Thermal performance of an active battery thermal management system combining annular thermoelectric coolers and phase change materials	190
Optimization of biomethane production from purified biowaste pyrolysis gas: A comparative techno-economic assessment	189
Triticale and sorghum as feedstock for bioethanol production via consolidated bioprocessing	184
Economic optima for buffers in direct reduction steelmaking under increasing shares of renewable hydrogen	183
Modeling and stability investigation on the governor-turbine-hydraulic system with a ceiling-sloping tail tunnel	181
Experimental study on high-precision detection technology for the freezing front height in brine on a horizontal cold plate surface in cold regions	181
Assessing the performance and economic viability of solar home systems: A way forward towards clean energy exploration and consumption	176
Benefits of establishing new energy consumption cities: Evidence from industrial enterprises sustainability	175
Performance assessment of bifacial and monofacial PV systems on different types of soils in a low-latitude site	175
Enhanced ethanol production from lignocellulosic hydrolysates by Thermoanaerobacterium aotearoense SCUT27/ΔargR1864 with improved lignocellulose-derived inhibitors tolerance	173
Multi-objective optimization of operation strategy in snow melting system for airfield runway using genetic algorithm: A case study in Beijing Daxing International Airport	169
A novel approach to optimize the positioning and measurement parameters in photovoltaic aerial inspections	167
Lab- and pilot-scale anaerobic digestion of municipal bio-waste and potential of digestate for biogas upgrading sustained by microbial analysis	167
Modeling and interpretation of geomagnetic data related to geothermal sources, Northwest of Delijan	167
Sensitivity analysis of a vertical geothermal heat pump system in a hot dry climate	166
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	166
Stepped pyrolysis: A novel approach for enhanced adsorbency and carbon in Pigeon pea stalk char	164
Numerical simulation on the heat extraction from the porous medium-low temperature geothermal reservoirs by self-circulation wellbore and its enhanced methods	162
Organic photovoltaic modules integrated inside and outside a polytunnel roof	161
Regional assessment of extreme tropical cyclone waves for marine renewable energy development	161
A dual stable MOF constructed through ligand exchange for enzyme immobilization with improved performance in biodiesel production	160
Numerical evaluation of heat extraction performance in enhanced geothermal system considering rough-walled fractures	158
Effects of length-to-diameter ratio, pinewood sawdust, and sodium lignosulfonate on quality of rice straw pellets produced via a flat die pellet mill	158
A granular multicriteria group decision making for renewable energy planning problems	156
Ultrasound-NATDES/DMSO system for corn straw biomass conversion into platform compounds	156
Technical and economic analysis of biogas and solar photovoltaic (PV) hybrid renewable energy system for dairy cattle barns	153
Modeling of the evolution of the porous structure during a physical activation process for the production of activated biocarbon: A novel low conversion approach	153
Design and control of a parallel-axis twin-rotor counter-rotating marine current turbine for the shallow sea conditions	153
Influence of water hammer effect on low frequency oscillation of grid-connected hydropower station system	153
Evaluating the energy-exergy-economy-environment performance of the biomass-photovoltaic-hydrogen integrated energy system based on hybrid multi-criterion decision-making model	151
Tailoring CoAl2O4 inversion degree-driven photocarrier separation and injection for photoelectrochemical water splitting	150
Performance investigation on an agricultural photovoltaic thermal system based on spectral separation	149
Spatial correlation network of renewable energy consumption and its influencing factors: Evidence from 31 Chinese provinces	147
Investigations for efficient design of a new counter flow double-pass curved solar air heater	145
Energetic and economic analysis of a novel concentrating solar air heater using linear Fresnel collector for industrial process heat	145
Estimation of kinematic viscosity of biodiesel-diesel blends: Comparison among accuracy of intelligent and empirical paradigms	143

Energy communities in rural areas: The participatory case study of Vega de Valcarce, Spain	143
Financing renewable energy generation in SSA: Does financial integration matter?	142
Thermophysical advancements and stability dynamics in nanofluids for solar energy harvesting: A comprehensive review	142
Digital sparks for a greener future: Unleashing the potential of information and communication technologies in green energy transition	141
A study to investigate the energy recovery potential from different macromolecules of a low-lipid marine Tetraselmis sp. biomass through HTL process	141
Biodiesel production via simultaneous esterification and transesterification of Periplaneta americana oil with liquid lipase Eversa® transform 2.0	140
Effect of angle of incidence on the optical-electrical-thermal performance of photovoltaic insulated glass units	140
Performance analysis of a concentrated direct absorption solar collector (DASC) with nanofluids using computational fluid dynamics and discrete ordinates radiation modelling (CFD-DORM)	139
Transition towards ecological sustainability through fiscal decentralization, renewable energy and green investment in OECD countries	139
Experimental study on the effects of chemical or microwave treatment on the tensile strength of hot dry rock	139
Kinetic and characteristic investigations on the conversion of cellulose to 5-hydroxymethylfurfural in the mixed metal salt system	138
Energetic, economic, environmental and climatic analysis of a solar combisystem for different consumption usages with PSI method ranking	136
An Ocean Thermal Energy Conversion power plant: Advanced exergy analysis and experimental validation	136
Taguchi optimization and thermoelectrical analysis of a pin fin annular thermoelectric generator for automotive waste heat recovery	135
Comparative study based on techno-economics analysis of different shipboard microgrid systems comprising PV/wind/fuel cell/battery/diesel generator with two battery technologies: A step toward green m	135
A novel vortex-based velocity sampling method for the actuator-line modeling of floating offshore wind turbines in windmill state	134
Experimental investigation on direct expansion solar-air source heat pump for water heating application	134
Actuator fault tolerant offshore wind turbine load mitigation control	134
Measuring regional variations and analyzing determinants for global renewable energy	133
Study on the operation of small rooftop wind turbines and its effect on the wind environment in blocks	133
Enhancing the performance of a photovoltaic thermal system with phase change materials: Predictive modelling and evaluation using neural networks	133
Effects of vortexes in feed header on air flow distribution of PEMFC stack: CFD simulation and optimization for better uniformity	132
Parametric study of a novel air-based photovoltaic-thermal collector with a transverse triangular-shaped block	131
Hybrid wind-solar energy potential modeling using ERA5 and solar irradiation data in google Earth Engine	130
Application of iron oxides modified volcanic rock in continuous phenol wastewater anaerobic treatment: Performance and underlying mechanisms	130
The nexus between economic development and pollution in the European Union new member states. The role of renewable energy consumption	129
Influence of waste plastic on pyrolysis of low-lipid microalgae: A study on thermokinetics, behaviors, evolved gas characteristics, and products distribution	128
The pathway toward pollution mitigation in EU28 region: Does hydropower growth make a difference?	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
Climate change and income inequality: Does renewable energy matter?	128
Integration of renewable energy, environmental policy stringency, and climate technologies in realizing environmental sustainability: Evidence from OECD countries	127
Potential and economic viability of green hydrogen production from seawater electrolysis using renewable energy in remote Japanese islands	126
The role of eco-innovations, trade openness, and human capital in sustainable renewable energy consumption: Evidence using CS-ARDL approach	124
A comparative study on the performance of ice-source heat pumps versus other heat source heat pumps: A case study in the UK	124
Experimental and numerical investigations on operation characteristics of seasonal borehole underground thermal energy storage	124
Investigation of poultry slaughterhouse waste stream to produce bio-fuel for internal utilization	123
A new optimization approach considering demand response management and multistage energy storage: A novel perspective for Fujian Province	123
A design-driven wind blade manufacturing model to identify opportunities to reduce wind blade costs	123
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	123
The role of limonene in the branching of straight chains in low-octane hydrocarbons	122
Validations of a double U-tube borehole model and a seasonal solar thermal energy storage system model	122
Site adaptation of global horizontal irradiance from the Copernicus Atmospheric Monitoring Service for radiation using supervised machine learning techniques	121
Design and optimization of a novel phase change photovoltaic thermal utilization structure for building envelope	121
WITHDRAWN: Nonlinear Kalman filters based rotor effective wind speed estimation: An experimental comparison	121
Strategic bidding for a hydro-wind-photovoltaic hybrid system considering the profit beyond forecast time	120
Design of a 20 kWth gasification reactor for harnessing energy from rice husks	120