OOIR: Observatory of International Research

Papers

(The H4-Index of Renewable Energy is 110. 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 2022-05-01 to 2026-05-01.)

Article	Citations
Editorial Board	535
Experimental-data-based, easy-to-use product gas composition prediction of a commercial open-top gasifier based on commercially used properties of softwood chips	342
New trilobular geometry using advanced materials for experimentally validated enhanced heat transfer in shallow geothermal applications	341
Numerical simulation of electricity generation potential through five vertical wells at Fengshun geothermal field in China	305
Design of a 20 kWth gasification reactor for harnessing energy from rice husks	305
Editorial Board	295
Numerical assessment and optimization of photovoltaic-based hydrogen-oxygen Co-production energy system: A machine learning and multi-objective strategy	284
Biosynthesis of biolubricant catalyzed by lipase B from Candida antarctica immobilized on nanocomposite of cashew apple bagasse lignin	281
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	275
Role of foreign direct investment and economic growth in renewable energy development	259
Optimization of biomethane production from purified biowaste pyrolysis gas: A comparative techno-economic assessment	250
Derivation and verification of three-dimensional wake model of multiple wind turbines based on super-Gaussian function	247
Effect of in-bed gas atmosphere on agglomeration in fluidized bed combustion and gasification of wheat straw	238
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	238
Performance assessment of bifacial and monofacial PV systems on different types of soils in a low-latitude site	232
Measuring regional variations and analyzing determinants for global renewable energy	227
Spatiotemporal solar radiation forecasting driven by satellite-based and reanalysis data for distributed PV integration using fully-convolutional neural network	226
Reaction mechanisms and hydrogen production in the thermal decomposition of simple carboxylic acids in O2/H2O environments	224
A wind farm control strategy for frequency regulation reserve: Optimize wake loss and frequency support capability	206
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	205
Combining ray-tracing and a linear thermal model to predict the performance of a panel solar cooker under varying solar angles	204
Credible capacity calculation method of distributed generation based on equal power supply reliability criterion	199
Co-pyrolysis and co-combustion of orange peel and biomass blends: Kinetics, thermodynamic, and ANN application	198
Climate change and income inequality: Does renewable energy matter?	198
The Spatiotemporal exploration of intercity transport energy efficiency in the mainland of China on the basis of improved stochastic frontier modelling	194

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	193
Multi-timescale dispatch technology for islanded energy system in the Gobi Desert	192
Solar metamaterial selective absorber for efficient energy harvesting: considering high-temperature absorption mechanisms	191
Bidirectional vibration energy harvesting and sensing system with biomimetic petal architecture	186
Energy, exergy, economic and environmental assessment of solar photovoltaic direct-drive refrigeration system for electronic device cooling	179
Towards safe, economical, and low-carbon coordinated multi-energy systems: a novel scheduling strategy for hybrid wind-solar-hydro-thermal power generation	178
Enhancing the performance of a photovoltaic thermal system with phase change materials: Predictive modelling and evaluation using neural networks	176
Dynamic energy storage capacity optimization based on ultra-short-term prediction in grid-connected PV system	170
Dispersion characteristics of large-scale liquid hydrogen spills in a real-world liquid hydrogen refueling station with various releasing and environmental conditions	168
Functionalized chitosan-derived porous carbon as a promising catalyst in one-pot conversion of soybean oil to biodiesel	167
Revolutionizing biodiesel with novel MWCNT-COOH@TiO2-ZnO nanocatalysts for enhanced transesterification and tribocorrosion resistance	167
Energetic, economic, environmental and climatic analysis of a solar combisystem for different consumption usages with PSI method ranking	166
Heat extraction from abandoned petroleum wells utilizing coaxial borehole heat exchanger in Ordos basin, China	166
A multi-parameter estimation of layered rock-soil thermal properties of borehole heat exchanger in a stratified subsurface	165
Uncertainty quantification analysis in the blade element momentum method	165
Economic and sustainability prospects for wet waste valorization: The case for sustainable aviation fuel from arrested anaerobic digestion	158
Assessing the prospective environmental performance of hydrogen from high-temperature electrolysis coupled with concentrated solar power	158
Nigeria's path to green energy transition: Insights from business preferences for solar PV adoption	157
Transition towards ecological sustainability through fiscal decentralization, renewable energy and green investment in OECD countries	155
Kinetic and characteristic investigations on the conversion of cellulose to 5-hydroxymethylfurfural in the mixed metal salt system	155
Editorial Board	154
Performance analyses of supercritical carbon dioxide-based parabolic trough collectors with double-glazed receivers	154
Can copper and zinc replace a commercial trace element mixture in enhancing methane production from agricultural digestate post-processing?	153
Theoretical models for predicting ventilation performance of vertical solar chimneys in tunnels	153
Lab- and pilot-scale anaerobic digestion of municipal bio-waste and potential of digestate for biogas upgrading sustained by microbial analysis	152
Preparation and performance study of highly transparent SiO2 aerogel for solar high-temperature thermal utilization	150
A granular multicriteria group decision making for renewable energy planning problems	150
Improving the performance of solar photovoltaic thermal cells using jet impingement and phase change materials cooling technology	150
Solar drying of apple and orange waste: Evaluation of a new thermodynamic approach, and characterization analysis	149
The balance issue of the proportion between new energy and traditional thermal power: An important issue under today's low-carbon goal in developing countries	149
Performance evaluation of a geothermal and solar-based multigeneration system and comparison with alternative case studies: Energy, exergy, and exergoeconomic aspects	148
A feasibility study of operating a low static pressure head micro pelton turbine based on water hammer phenomenon	148
A novel oscillatory thermal response test method for efficient characterization of ground thermal properties: Methodology and data analysis	148
Corrigendum to “Tropho-metabolic transition during Chlorella sp. cultivation on synthesis of biodiesel” [Renew. Energy 98 (2016) 84–91]	147
WITHDRAWN: ANN and ML Based Modeling of InGaN/GaN p-i-n Solar Cells for Concentrator Photovoltaics	146
Multi-objective optimization of operation strategy in snow melting system for airfield runway using genetic algorithm: A case study in Beijing Daxing International Airport	145
The role of eco-innovations, trade openness, and human capital in sustainable renewable energy consumption: Evidence using CS-ARDL approach	145
Spatial correlation network of renewable energy consumption and its influencing factors: Evidence from 31 Chinese provinces	144
Digital sparks for a greener future: Unleashing the potential of information and communication technologies in green energy transition	143
Effect of semi-transparent a-Si PV glazing within double-skin façades on visual and energy performances under the UK climate condition	143
Techno-economic analysis of greenhouse solar dryer for drying agricultural produce	142
Power consumption and oxygen transfer optimization for C5 sugar acid production in a gas-liquid stirred tank bioreactor using CFD-Taguchi method	141
Simultaneous optimization of electric production, azo dye, and yeast wastewater treatment in microbial fuel cell: Selection of the most suitable optimal conditions by PROMETHEE	141
Transforming Costa Rica's environmental quality: The role of renewable energy, rule of law, corruption control, and foreign direct investment in building a sustainable future	140
Paving the way for sustainable energy solutions: A real-time pricing mechanism in integrated energy systems with electric vehicles	140
Understanding public awareness and attitudes toward renewable energy resources in Saudi Arabia	140
Dual-combustion chamber cycle utilizing biomass and geothermal energy: A comprehensive economic analysis and multi-objective optimization for enhanced multi-generation	139
Energy communities in rural areas: The participatory case study of Vega de Valcarce, Spain	138
Emissions trading scheme and energy consumption and output structure: Evidence from China	137
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	136

Analyzing convective heat transfer in combined solar chimneys: A theoretical and numerical study of key influencing parameters	135
Enhancing methanogenic propionate degradation by resuscitation-promoting factors and pyruvate through strengthening syntrophic interactions in microbial community	134
Innovative passive cooling of photovoltaic panel using loop heat pipe technology with passive daytime radiative cooling	133
Standardized benchmark of historical compound wind and solar energy droughts across the Continental United States	133
Energetic and economic analysis of a novel concentrating solar air heater using linear Fresnel collector for industrial process heat	132
Site adaptation of global horizontal irradiance from the Copernicus Atmospheric Monitoring Service for radiation using supervised machine learning techniques	132
Acid-catalyzed co-hydrothermal carbonization of sewage sludge and mixed straws to produce high-quality solid fuel	132
A comprehensive review on future research trends in solar cell parameter extraction techniques	131
Hydrodynamic performance of full-scale tidal current turbine arrays wakes in tandem and parallel configurations	130
Enhancement ultra-low-frequency wave energy harvesting through a piezoelectric energy harvester based on C-shaped cantilever beams	130
Improvement of GH10 xylanase activity based on channel hindrance elimination strategy for better synergistic cellulase to enhance green bio-energy production	130
Design and control of a parallel-axis twin-rotor counter-rotating marine current turbine for the shallow sea conditions	129
Are renewable energy sources more evenly distributed than fossil fuels?	129
Sustainable synthesis of bio-diesel and jet-fuel range hydrocarbons from poisonous Abrus Precatorius seed oil over MoO3-HPW/Ga-KIT-6	128
Integration of dynamic insulation and dynamic phase change materials systems for residential building envelopes	127
Sustainable solution to the critical challenges of an oceanic wave farm for maximizing power generation	127
Understanding the imperativeness of environmental-related technological innovations in the FDI – Environmental performance nexus	124
An Ocean Thermal Energy Conversion power plant: Advanced exergy analysis and experimental validation	124
Unraveling causal dynamics: Exploring resource efficiency and biomass utilization in Malaysia's context	123
New energy technology innovation and energy poverty alleviation in China	122
Experimental analysis of thermal energy variations in parabolic dish solar collector with hybrid heat storage medium	121
Transformation of reanalysis data for improved long-term estimation of wind speed and direction at a target site	118
Numerical simulation on the heat extraction from the porous medium-low temperature geothermal reservoirs by self-circulation wellbore and its enhanced methods	118
Evaluating the sustainability of the hydrogen economy using multi-criteria decision-making analysis in Korea	118
Unveiling the potential of operating time in improving machine learning models’ performance for waste biomass gasification systems	118
Ultraviolet–visible–near-infrared irradiation responsive high-entropy layered double hydroxides for on-demand hydrogen evolution reaction via sodium borohydride hydrolysis	117
Evaluating the energy-exergy-economy-environment performance of the biomass-photovoltaic-hydrogen integrated energy system based on hybrid multi-criterion decision-making model	116
Investigation of poultry slaughterhouse waste stream to produce bio-fuel for internal utilization	113
Integration of renewable energy, environmental policy stringency, and climate technologies in realizing environmental sustainability: Evidence from OECD countries	113
A cross-dataset benchmark for neural network-based wind power forecasting	112
Abnormal data cleaning for wind turbines by image segmentation based on active shape model and class uncertainty	112
Research on stacking ensemble method for day-ahead ultra-short-term prediction of photovoltaic power	111
Multi-objective bi-level planning of the integrated energy system considering uncertain user loads and carbon emission during the equipment manufacturing process	111
Electron deficiency modulates hydrogen adsorption strength of Ru single-atomic catalyst for efficient hydrogen evolution	111
Effect of seepage condition in geological stratification on thermal response test analysis of borehole heat exchanger	110
A robust I–V curve correction procedure for degraded photovoltaic modules	110