2026 Sotirios Karellas: Engineering and Technology Researcher – H-Index, Publications & Awards

Discipline name	D-Index	World Ranking	Current World Ranking	National Ranking	Current National Ranking	Publications	Citations
Engineering and Technology	49	4313	4147	37	35	203	9112

Overview

Sotirios Karellas is affiliated with the National Technical University of Athens in Greece. Their research primarily focuses on engineering, with a significant emphasis on mechanical engineering and renewable energy systems.

The main fields of study for Sotirios Karellas include:

Engineering

Within this domain, their subfields of study are:

Mechanical Engineering
Renewable Energy, Sustainability and the Environment
Electrical and Electronic Engineering
Building and Construction
Energy Engineering and Power Technology

Their research covers various topics, including:

Thermodynamic and Exergetic Analyses of Power and Cooling Systems
Refrigeration and Air Conditioning Technologies
Solar Thermal and Photovoltaic Systems
Advanced Thermodynamic Systems and Engines
Adsorption and Cooling Systems
Hybrid Renewable Energy Systems
Building Energy and Comfort Optimization

Recent publications by Sotirios Karellas include:

Comparative life cycle greenhouse gas emissions assessment of battery energy storage technologies for grid applications (2023), published in Journal of Cleaner Production
Organic flash cycles in Rankine-based Carnot batteries with large storage temperature spreads (2022), published in Energy Conversion and Management
Techno-economic assessment of a small-scale biomass ORC-CHP for district heating (2021), published in Energy Conversion and Management
Bioenergy with carbon capture and utilization: A review on the potential deployment towards a European circular bioeconomy (2021), published in Renewable and Sustainable Energy Reviews
Exergetic and economic analysis of a solar driven small scale ORC (2020), published in Renewable Energy

Frequent co-authors collaborating with Sotirios Karellas include:

Konstantinos Braimakis
Tryfon C. Roumpedakis
Antonios Charalampidis
George Meramveliotakis
George Kosmadakis

The researcher frequently publishes in these venues:

Renewable Energy
Energy
Energies
Applied Thermal Engineering
Open Research Europe

Best Publications

Energetic and economic investigation of Organic Rankine Cycle applications

A. Schuster;S. Karellas;E. Kakaras;H. Spliethoff

708
Citations
Efficiency optimization potential in supercritical Organic Rankine Cycles

A. Schuster;S. Karellas;R. Aumann

497
Citations
Development of an investment decision tool for biogas production from agricultural waste

Sotirios Karellas;Ioannis Boukis;Georgios Kontopoulos

338
Citations
Energy–exergy analysis and economic investigation of a cogeneration and trigeneration ORC–VCC hybrid system utilizing biomass fuel and solar power

Sotirios Karellas;Konstantinos Braimakis

315
Citations
Exergy analysis of solar thermal collectors and processes

Soteris A. Kalogirou;Sotiriοs Karellas;Konstantinos Braimakis;Camelia Stanciu

306
Citations
Energetic and exergetic analysis of waste heat recovery systems in the cement industry

S. Karellas;A.-D. Leontaritis;G. Panousis;E. Bellos

299
Citations
Exergy analysis on solar thermal systems: A better understanding of their sustainability

Soteris A. Kalogirou;Sotirios Karellas;Viorel Badescu;Viorel Badescu;Konstantinos Braimakis

237
Citations
Supercritical Fluid Parameters in Organic Rankine Cycle Applications

Sotirios Karellas;Andreas Schuster

222
Citations
Comparative techno-economic analysis of ORC and gasification for bioenergy applications

A. Rentizelas;S. Karellas;E. Kakaras;I. Tatsiopoulos

222
Citations
Influence of supercritical ORC parameters on plate heat exchanger design

Sotirios Karellas;Andreas Schuster;Aris-Dimitrios Leontaritis

194
Citations
Compressor intake-air cooling in gas turbine plants

E. Kakaras;A. Doukelis;S. Karellas

193
Citations
Energetic optimization of regenerative Organic Rankine Cycle (ORC) configurations

Konstantinos Braimakis;Sotirios Karellas

187
Citations
Comparative thermodynamic analysis of compressed air and liquid air energy storage systems

Piotr Krawczyk;Łukasz Szabłowski;Sotirios Karellas;Emmanuel Kakaras

169
Citations
Hydrogen Production from Biomass Gasification

Sotirios Karellas

168
Citations
Energy and exergy analysis of adiabatic compressed air energy storage system

Lukasz Szablowski;Piotr Krawczyk;Krzysztof Badyda;Sotirios Karellas

155
Citations
Low grade waste heat recovery with subcritical and supercritical Organic Rankine Cycle based on natural refrigerants and their binary mixtures

Konstantinos Braimakis;Markus Preißinger;Dieter Brüggemann;Sotirios Karellas

150
Citations
Thermodynamic analysis and life cycle assessment of supercritical pulverized coal-fired power plant integrated with No.0 feedwater pre-heater under partial loads

Xiaoqu Han;Nana Chen;Junjie Yan;Jiping Liu

144
Citations
Comparison of the performance of compressed-air and hydrogen energy storage systems: Karpathos island case study

S. Karellas;N. Tzouganatos

143
Citations
Comparative life cycle greenhouse gas emissions assessment of battery energy storage technologies for grid applications

Unknown

137
Citations
An innovative biomass gasification process and its coupling with microturbine and fuel cell systems

S. Karellas;J. Karl;E. Kakaras

126
Citations
Waste heat recovery from a landfill gas-fired power plant

Daniela Gewald;Konstantinos Siokos;Sotirios Karellas;Hartmut Spliethoff

117
Citations