OOIR: Observatory of International Research

Papers

(The H4-Index of Renewable Energy is 105. 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 2022-08-01 to 2026-08-01.)

Article	Citations
Editorial Board	545
Editorial Board	370
Lab- and pilot-scale anaerobic digestion of municipal bio-waste and potential of digestate for biogas upgrading sustained by microbial analysis	348
Parametric study of a novel air-based photovoltaic-thermal collector with a transverse triangular-shaped block	326
Pivotal MoOx-decorated Ru/C with a monomeric structure boosts the room temperature and low-pressure hydrogenation of levulinic acid to γ−valerolactone	325
Performance evaluation of a geothermal and solar-based multigeneration system and comparison with alternative case studies: Energy, exergy, and exergoeconomic aspects	311
A granular multicriteria group decision making for renewable energy planning problems	305
Solar drying of apple and orange waste: Evaluation of a new thermodynamic approach, and characterization analysis	270
Improving the performance of solar photovoltaic thermal cells using jet impingement and phase change materials cooling technology	263
A novel oscillatory thermal response test method for efficient characterization of ground thermal properties: Methodology and data analysis	258
New trilobular geometry using advanced materials for experimentally validated enhanced heat transfer in shallow geothermal applications	251
Numerical simulation of electricity generation potential through five vertical wells at Fengshun geothermal field in China	248
Editorial Board	222
Parametric optimization of a novel solar concentrating photovoltaic-near field thermophotovoltaic hybrid system based on cascade utilization of full-spectrum solar energy	220
Modelled annual thermal performance of a 50MWth refractory-lined particle-laden solar receiver operating above 1000°C	219
Unlocking the potentials using humidifier-dehumidifier for proton exchange membrane fuel cell waste heat recovery	215
The Spatiotemporal exploration of intercity transport energy efficiency in the mainland of China on the basis of improved stochastic frontier modelling	215
Energy, exergy, economic and environmental assessment of solar photovoltaic direct-drive refrigeration system for electronic device cooling	208
Revolutionizing biodiesel with novel MWCNT-COOH@TiO2-ZnO nanocatalysts for enhanced transesterification and tribocorrosion resistance	207
Air supply subsystem efficiency optimization for fuel cell power system with layered control method	206
Assessing a sustainable aviation fuel supply chain from winter canola and its carbon intensity considering feedstock yield variations	201
Editorial Board	200
Preparation and performance study of highly transparent SiO2 aerogel for solar high-temperature thermal utilization	190
WITHDRAWN: ANN and ML Based Modeling of InGaN/GaN p-i-n Solar Cells for Concentrator Photovoltaics	183
Mitigation of severe false data injection attacks (FDIAs) in marine current turbine (MCT) type 4 synchronous generator renewable energy using promoted backstepping method	179

Regional assessment of extreme tropical cyclone waves for marine renewable energy development	177
Performance of a sedimentation tank for standing column wells coupled with geothermal heat pump systems	177
Enhancing semi-continuous anaerobic digestion efficiency with nanobubble water: thermophysical properties optimization and microbial regulation	176
Stepped pyrolysis: A novel approach for enhanced adsorbency and carbon in Pigeon pea stalk char	173
Optimization and analysis of the deflector system for a bidirectional H-type hydrokinetic twin-turbine system	172
Effects of confinement ratio and flow speed on the effectiveness of piezoelectric-flag energy harvesters in the wake of a bluff body	172
Benefits of establishing new energy consumption cities: Evidence from industrial enterprises sustainability	167
Assessing the performance and economic viability of solar home systems: A way forward towards clean energy exploration and consumption	166
Experimental analysis of thermal energy variations in parabolic dish solar collector with hybrid heat storage medium	166
Electron deficiency modulates hydrogen adsorption strength of Ru single-atomic catalyst for efficient hydrogen evolution	163
An Ocean Thermal Energy Conversion power plant: Advanced exergy analysis and experimental validation	163
Simultaneous optimization of electric production, azo dye, and yeast wastewater treatment in microbial fuel cell: Selection of the most suitable optimal conditions by PROMETHEE	162
Sustainable synthesis of bio-diesel and jet-fuel range hydrocarbons from poisonous Abrus Precatorius seed oil over MoO3-HPW/Ga-KIT-6	161
Multi-objective optimization of operation strategy in snow melting system for airfield runway using genetic algorithm: A case study in Beijing Daxing International Airport	161
Coordinated scheduling of inter-regional systems connected via HVDC links: A distributionally robust approach with emergency power support for frequency stability	160
Sustainable solution to the critical challenges of an oceanic wave farm for maximizing power generation	160
Metagenomic exploration of the promotion of electricity production in mushroom substrate based microbial fuel cells by acid hydrolysis	159
Regional analysis on the thermal and electrical properties of semi-transparent photovoltaic facades	158
Multiscale analysis and deep learning-based prediction of partial shading for TBC and TOPCon PV modules	157
Assessment of regional-scale geothermal production based on a hybrid deep learning model: A case study of the southern Songliao Basin, China	156
Can copper and zinc replace a commercial trace element mixture in enhancing methane production from agricultural digestate post-processing?	156
Traveling wave turbine - An internal flow energy absorption mode based on the traveling wave motion	156
Tailoring CoAl2O4 inversion degree-driven photocarrier separation and injection for photoelectrochemical water splitting	156
Modeling and interpretation of geomagnetic data related to geothermal sources, Northwest of Delijan	154
Experimental study on effects of compressor speed on a heat pump dryer system with auxiliary solar source	153
Validations of a double U-tube borehole model and a seasonal solar thermal energy storage system model	151
Advanced viscosity prediction in hydrogen storage systems: emphasizing the role of cushion gases in pure and mixture forms	151
Effect of CO2 dilution on thermal characteristics and chemiluminescence for CH4/O2 diffusion flame: A numerical simulation based on detailed mechanism	151
Comparative study of grass pyrolysis over regenerated catalysts: Tyre ash, zeolite, and nickel-supported ash and zeolite	150
Design and optimization of a novel phase change photovoltaic thermal utilization structure for building envelope	149
Effect of lateral spacing on output power of offshore wind turbines in different turbulence environments	149
Low frequency surge motion and inter-spacing distances between turbines in offshore wind farms	149
The theoretical predicting models of efficiency curves for pump and turbine modes	148
Optimizing cooling, power, freshwater, and hydrogen production in a dual-fuel gas turbine cycle: A multi-layered approach of waste heat recovery with biomass and methane integration	147
Assessment of solar energy resource potential in the western region of Jilin Province: A multi-dimensional framework based on availability, stability and concentration	146
Experimental-data-based, easy-to-use product gas composition prediction of a commercial open-top gasifier based on commercially used properties of softwood chips	144
Study on photothermal transmission and anaerobic digestion characteristics of reactor with folding plates by direct solar radiation	143
Integration of dynamic insulation and dynamic phase change materials systems for residential building envelopes	142
Enhanced hydrogenation of CO2 to aromatics-rich sustainable aviation fuel over ZnxIn2Oy coupled HZSM-5 bifunctional catalyst	141
Energetic, economic, environmental and climatic analysis of a solar combisystem for different consumption usages with PSI method ranking	141
Application of iron oxides modified volcanic rock in continuous phenol wastewater anaerobic treatment: Performance and underlying mechanisms	138
Performance assessment of a Triple Coaxial-Cylinder Wave-Energy Converter (TCWEC)	138
Influence of water hammer effect on low frequency oscillation of grid-connected hydropower station system	137
Strategic bidding for a hydro-wind-photovoltaic hybrid system considering the profit beyond forecast time	135
Theoretical models for predicting ventilation performance of vertical solar chimneys in tunnels	135
Acid-catalyzed co-hydrothermal carbonization of sewage sludge and mixed straws to produce high-quality solid fuel	133
Optimal phasing of tidal stream power around the British Isles and within the English Channel for green ammonia production	133
Statistical analysis of electricity supply deficits from renewable energy sources across an Alpine transect	133
Global horizontal irradiance prediction model for multi-site fusion under different aerosol types	131
Design of a 20 kWth gasification reactor for harnessing energy from rice husks	130

Evaluating the energy-exergy-economy-environment performance of the biomass-photovoltaic-hydrogen integrated energy system based on hybrid multi-criterion decision-making model	129
Multi-timescale dispatch technology for islanded energy system in the Gobi Desert	129
3E thermodynamic modeling and optimization a novel of ARS-CPVT with the effect of inserting a turbulator in the solar collector	129
Measuring regional variations and analyzing determinants for global renewable energy	129
The potential alleviation effects of rural rooftop photovoltaic potential on energy poverty: evidence from China	126
A novel vortex-based velocity sampling method for the actuator-line modeling of floating offshore wind turbines in windmill state	125
Concentration performance of solar collector integrated compound parabolic concentrator and flat microchannel tube with tracking system	123
Hydrodynamic performance of full-scale tidal current turbine arrays wakes in tandem and parallel configurations	123
Analyzing convective heat transfer in combined solar chimneys: A theoretical and numerical study of key influencing parameters	118
Nigeria's path to green energy transition: Insights from business preferences for solar PV adoption	118
Performance analysis of a concentrated direct absorption solar collector (DASC) with nanofluids using computational fluid dynamics and discrete ordinates radiation modelling (CFD-DORM)	118
Experimental study on high-precision detection technology for the freezing front height in brine on a horizontal cold plate surface in cold regions	116
Thermophysical advancements and stability dynamics in nanofluids for solar energy harvesting: A comprehensive review	115
Dynamic energy storage capacity optimization based on ultra-short-term prediction in grid-connected PV system	114
Potential and economic viability of green hydrogen production from seawater electrolysis using renewable energy in remote Japanese islands	114
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	113
The role of limonene in the branching of straight chains in low-octane hydrocarbons	112
Performance analyses of supercritical carbon dioxide-based parabolic trough collectors with double-glazed receivers	111
Kinetic and characteristic investigations on the conversion of cellulose to 5-hydroxymethylfurfural in the mixed metal salt system	110
Functionalized chitosan-derived porous carbon as a promising catalyst in one-pot conversion of soybean oil to biodiesel	109
A comparative study on the performance of ice-source heat pumps versus other heat source heat pumps: A case study in the UK	109
Credible capacity calculation method of distributed generation based on equal power supply reliability criterion	109
Double-stage frequency-boost mechanism for high-power wave energy harvesting from ultra-low frequency ocean excitations	109
Unraveling causal dynamics: Exploring resource efficiency and biomass utilization in Malaysia's context	108
Investigation into the physicochemical properties of three types of biomass-derived soot	107
Two-stage solid-state anaerobic digestion of highland barley straw with liquid fraction of digestate and calcium oxide pretreatment: Performance and microbial community analysis	107
Effect of seepage condition in geological stratification on thermal response test analysis of borehole heat exchanger	107
A new optimization approach considering demand response management and multistage energy storage: A novel perspective for Fujian Province	106
Uncertainty quantification analysis in the blade element momentum method	106
Effect of in-bed gas atmosphere on agglomeration in fluidized bed combustion and gasification of wheat straw	105
Integration of renewable energy, environmental policy stringency, and climate technologies in realizing environmental sustainability: Evidence from OECD countries	105
Climate change and income inequality: Does renewable energy matter?	105
Availability and 6E assessment and optimal design of a novel cogeneration system based on integrated turbo compressor station - SOFC-solar-geothermal-steam and organic Rankine cycles with machine lear	105