S. O. Onyegegbu

University of Nigeria

Publishing since 1978, latest 2026

Renewable Energy, Sustainability and the Environment
Mechanical Engineering
Biomedical Engineering
Computational Mechanics
Civil and Structural Engineering
Statistical and Nonlinear Physics

Their record on OpenAlex

Publications: 341978–2026
Citations: 411to those papers
h-index: 11i10-index 13
Field-weighted impact: 0.761.00 is the world average
World top 10%: 3%1 of 34 scored papers
Open access: 21%7 papers free to read

By year

Papers, and the citations to them

Publications, left axisCitations to that year’s papers, right axis2026 still in progress

Publications

34 in all

Study on the Comparison of the Performance of a Glazed Transpired Collector and a Glazed Non-transpired Collector with Chimney in Natural Convection Mode
2026Journal of Energy Research and ReviewsJournalOpen access0 citations10.9734/jenrr/2026/v18i8531
Heat Transfer Coefficient for a Glazed Transpired Solar Collector in Natural Convection Mode

Download CV:PDFWord

Citations received each year

Peerford

To all their work, old papers included. Google Scholar also counts citations from theses, books and web pages, so its line runs higher.

What they work on

From the classification of each paper

Subfields

Renewable Energy, Sustainability and the Environment1544%
Mechanical Engineering1132%
Biomedical Engineering926%
Computational Mechanics515%
Civil and Structural Engineering412%
Statistical and Nonlinear Physics412%
Artificial Intelligence39%
Astronomy and Astrophysics26%
Automotive Engineering26%
Electrical and Electronic Engineering26%

Physical Sciences

Topics most written on

Solar Thermal and Photovoltaic Systems12
Heat Transfer Mechanisms8
Solar-Powered Water Purification Methods6
Heat Transfer and Optimization5
Advanced Thermodynamics and Statistical Mechanics4
Nanofluid Flow and Heat Transfer4
Solar Radiation and Photovoltaics3
Thermal Radiation and Cooling Technologies3
Thermochemical Biomass Conversion Processes3
Adsorption and Cooling Systems2
Biodiesel Production and Applications2
Biofuel production and bioconversion2

Who they write with

Their most frequent co-authors, and the papers those co-authors share

Where their co-authors are

29% of their papers have a co-author abroad

papers co-written1223344Home

Most frequent partner countries

United States5
Germany2
South Africa2
Finland1
United Kingdom1
Italy1

Papers with at least one author in that country.

Institutions written with most

Joseph Sarwuan Tarka University MakurdiNG3 papers
University of Massachusetts LowellUS2 papers
Michigan State UniversityUS2 papers
Ruhr University BochumDE2 papers
National Universities CommissionNG2 papers
University of MichiganUS1 paper
Aalto UniversityFI1 paper
University of UlsterGB1 paper
ENEA Trisaia Research Centre1 paper
National Agency for New Technologies, Energy and Sustainable Economic DevelopmentIT1 paper

Where they publish

Energy Conversion and Management5
Nigerian Journal of Technology3
Solar Energy3
ASME Journal of Heat and Mass Transfer2
Drying Technology2
Journal of Energy in Southern Africa2
Journal of Energy Research and Reviews

Development goals addressed

From each paper’s title and abstract

7Affordable and clean energy19
6Clean water and sanitation4
12Responsible consumption and production2
13Climate action1

Most cited

Analysis of stratified thermal storage systems: An overview
Heat and Mass Transfer7
201479 citationsWorld top 10%
Electricity Generation From a Compound Parabolic Concentrator Coupled to a Thermoelectric Module
Journal of Solar Energy Engineering7
201047 citations
Nocturnal distillation in basin-type solar stills
Applied Energy

Journal of Energy Research and Reviews

Bio-oil yield potential of some tropical woody biomass

2017Journal of Energy in Southern AfricaJournalOpen accessSenior author20 citations10.17159/2413-3051/2015/v26i2a2193

Numerical Investigation of Entropy Generation in Stratified Thermal Stores

2017Journal of Energy Resources TechnologyJournalSenior authorCorresponding5 citations10.1115/1.4037535

Analysis of stratified thermal storage systems: An overview

2014Heat and Mass TransferJournalSenior author79 citations10.1007/s00231-014-1302-8

Numerical Study of Models for Estimating Edge Heat Loss in Solar Absorbers

2012Journal of Thermal Science and Engineering ApplicationsJournalSenior author0 citations10.1115/1.4006870

Design of Preventive Maintenance Scheduling Model for Deteriorating Systems

2011Nigerian Journal of TechnologyJournalOpen accessSenior author4 citations

Solar radiation induced natural convection in stagnant water layers

1990Energy Conversion and ManagementJournalFirst authorCorresponding5 citations10.1016/0196-8904(90)90018-t

Performance of photovoltaic cells in an equatorial climate

1989Solar & Wind TechnologyJournalFirst authorCorresponding11 citations10.1016/0741-983x(89)90080-5

Stability of thermal convection in basin-type solar stills

1987Energy Conversion and ManagementJournalFirst authorCorresponding2 citations10.1016/0196-8904(87)90087-2

Nocturnal distillation in basin-type solar stills

1986Applied EnergyJournalFirst authorCorresponding28 citations10.1016/0306-2619(86)90044-9

Heat transfer inside a horizontal cylindrical annulus in the presence of thermal radiation and buoyancy

1986International Journal of Heat and Mass TransferJournalFirst authorCorresponding17 citations10.1016/0017-9310(86)90118-3

Approximate Solution of Unsteady Groundwater Flows

1986Journal of Hydraulic EngineeringJournalFirst authorCorresponding0 citations10.1061/(asce)0733-9429(1986)112:10(971)

Solar distillation of pond (muddy) water

1984Energy Conversion and ManagementJournalFirst authorCorresponding11 citations10.1016/0196-8904(84)90044-x

Performance of a modulated solar thermoelectric cooler

1982Energy Conversion and ManagementJournalFirst authorCorresponding1 citation10.1016/0196-8904(82)90007-3

Pilot-Plant for Energy Recovery from Tropical Waste Food Materials

1981Nigerian Journal of TechnologyJournalOpen accessFirst author0 citations

Convective Instability of Rotating Radiating Fluids

1980ASME Journal of Heat and Mass TransferJournalFirst authorCorresponding9 citations10.1115/1.3244271

The Effect of Secondary Fuel Injection on the Performance and Exhaust Emissions of An Open-Chamber Diesel Engine

1978SAE technical papers on CD-ROM/SAE technical paper seriesPublicationFirst author5 citations10.4271/780786

Journal of Solar Energy Engineering2

How it can be read

21% free to read

Diamond 2 · 6%Free to read and to publish
Gold 3 · 9%In an open-access journal
Green 2 · 6%A copy in a repository
Closed 27 · 79%Behind a paywall

Who funds it

4 of 34 papers name a funder

Abdus Salam International Centre for Theoretical Physics2
College of Engineering, Michigan State University1
University of Dodoma1