Thermodynamic approaches for integrating power generation and thermochemical energy storage with a novel solar-ORC system Arif Karabuga, Behiye Yuksel, Devrim Aydin, Zafer Utlu, Saffa Riffat Thermal Science and Engineering Progress, 2026 In the present study, a solar-driven Organic Rankine Cycle (ORC) integrated with thermochemical energy storage (TCES) is investigated for flexible heat and power generation. An evacuated tube solar collector (ETSC) is employed to harness solar energy. Electricity generation is achieved through the ORC using R134a as the working fluid. The TCES system is used to store part of the gained solar energy to meet the peak heating demands. A novel heat recuperation method is applied in the system to recover the waste heat of TCES charging exhaust air to preheat the R134A prior to entering the evaporator. In the TCES system, CaCl2 impregnated Pumice is used as the composite sorbent. The analysis of the integrated system is performed based on the First and Second Laws of Thermodynamics. Accordingly, energetic and exergetic efficiencies of the ORC, TCES, and whole system are evaluated under different operating conditions. Within the analyses, the TCES performance is evaluated independently for the charging and discharging processes. The exergy efficiency of the TCES unit is calculated as 2.66% during the charging phase and 4.19% during the discharging phase. Additionally, the exergy efficiency of the ORC and the whole system are obtained as 7.16% and 5.67%, respectively.
Thermodynamic assessment of power generation from waste heat in natural gas compressor station: A case study Arif Karabuga, Murat Iskender, Behiye Yuksel, Elif Sultan Aydin, Zafer Utlu, Ferhat Eti International Journal of Thermofluids, 2025 • Waste heat supported power generation system was discussed. • The recovery of waste heat in a natural gas compression unit was examined in detail. • The exergy efficiency of the whole system was calculated as 23.27%. • The power generation was calculated as 3838 kW. This study presents a comprehensive thermodynamic and economic assessment of an Organic Rankine Cycle (ORC) system for waste heat recovery in natural gas compressor stations. The research systematically evaluates the impact of critical thermodynamic parameters, including turbine inlet temperature, pressure, working fluid flow rate, and exhaust gas temperature, on both energy and exergy efficiencies. The findings, system energy and exergy efficiencies increase by 22.52% and 22.41%, respectively. Additionally, an economic analysis was conducted to evaluate the feasibility of the system. The results indicate that higher turbine inlet temperatures contribute to lower LCOE, improving cost-effectiveness, while also enhancing sustainability through increased exergy efficiency. Additionally, a sensitivity analysis was performed using the Theil-Sen Robust Estimator, confirming that the system remains operationally stable across reasonable fluctuations in key parameters. These findings highlight ORC technology as an effective and sustainable solution for waste heat recovery, offering both economic and environmental benefits in industrial applications.
Assessment of carbon trading within blockchain and subfield of artificial intelligence: a review Sofya Morozova, Arif Karabuğa, Zafer Utlu International Journal of Global Warming, 2025 How can blockchain and AI revolutionise carbon trading? This article explores this question by reviewing the literature on blockchain's potential to create smart contracts for carbon trading. It also illustrates step-by-step guidance to write a smart contract that covers the essential aspects of the market. It is suggested that blockchain technology can address some shortcomings of the current system while usage of the data provided by ML makes contract actually smart.
Thermodynamic analysis of hydrogen production system based on solar energy ECOS 2021 34th International Conference on Efficency Cost Optimization Simulation and Environmental Impact of Energy Systems, 2021
Thermodynamic analysis of power production based on nitrogen liquefaction cold energy using the cryogenic method ECOS 2021 34th International Conference on Efficency Cost Optimization Simulation and Environmental Impact of Energy Systems, 2021
Investigation of performance of thermal power plants in terms of advanced exergy analysis approach ECOS 2020 Proceedings of the 33rd International Conference on Efficiency Cost Optimization Simulation and Environmental Impact of Energy Systems, 2020
Evaluation of electrical field effects of façade type a PV panel with occupational health and safety perspective, a case study ECOS 2020 Proceedings of the 33rd International Conference on Efficiency Cost Optimization Simulation and Environmental Impact of Energy Systems, 2020
Energetic and exergetic analysis of thermophotovoltaic systems ECOS 2019 Proceedings of the 32nd International Conference on Efficiency Cost Optimization Simulation and Environmental Impact of Energy Systems, 2019
Advanced exergy analysis of cryogenic liquefaction system ECOS 2019 Proceedings of the 32nd International Conference on Efficiency Cost Optimization Simulation and Environmental Impact of Energy Systems, 2019
Thermodynamic approaches for integrating power generation and thermochemical energy storage with a novel solar-ORC system A Karabuga, B Yuksel, D Aydin, Z Utlu, S Riffat Thermal Science and Engineering Progress, 104609 , 2026 2026
Comparative performance and economic analysis for different clean energy and hydrogen production systems: A case study for Türkiye A Karabuga, E Cuce, PM Cuce, Z Utlu International Journal of Hydrogen Energy 201, 152933 , 2026 2026 Citations: 3
Exergy and economic analysis of evacuated tube heat pipe solar collector and parabolic trough solar collectors based power, cooling and hydrogen production A Karabuga International Journal of Hydrogen Energy 146, 150006 , 2025 2025 Citations: 5
Thermodynamic assessment of power generation from waste heat in natural gas compressor station: A case study A Karabuga, M Iskender, B Yuksel, ES Aydin, Z Utlu, F Eti International Journal of Thermofluids 28, 101313 , 2025 2025 Citations: 5
Exergy and economic approaches for integrating power and green hydrogen production with a novel solar-ORC system A Karabuga, Z Utlu, MZ Yakut Thermal Science and Engineering Progress 61, 103552 , 2025 2025 Citations: 12
Geopolitical Conflicts: Blockchain Use in International Energy Trading S Morozova, A Karabuga, Z Utlu Energy Catalyst 1, 79-88 , 2025 2025 Citations: 1
Assessment of carbon trading within blockchain and subfield of artificial intelligence: a review S Morozova, A Karabuğa, Z Utlu International Journal of Global Warming 35 (2-4), 186-200 , 2025 2025
International hydrogen market meets blockchain: A new frontier in trade S Morozova, A Karabuğa, Z Utlu International Journal of Energy Studies 9 (4), 581-599 , 2024 2024
Cost reduction of integrated renewable energy sources in home energy management systems (HEMS) using particle swarm optimization ND Baghbani, H Zeynali, A Karabuga 2024 16th International Conference on Electronics, Computers and Artificial … , 2024 2024 Citations: 9
Thermodynamic analysis of an evacuated tube solar collector system for industrial building application: A case study A Karabuga, H Ayarturk, MZ Yakut, Z Utlu, H Iseri, S Kilic International Journal of Hydrogen Energy 68, 17-26 , 2024 2024 Citations: 5
Energy and exergy analysis of waste heat and solar energy assisted for hydrogen production system: A case study A Karabuga, MZ Yakut, Z Utlu International Journal of Hydrogen Energy 75, 496-505 , 2024 2024 Citations: 17
Exergy, economic and environmental analyses of the renewable energy assisted hydrogen, cooling and electricity production: A case study A Karabuga, Z Utlu, MZ Yakut, H Ayarturk International Journal of Hydrogen Energy 75, 253-261 , 2024 2024 Citations: 22
15th International EXERGY, ENERGY AND ENVIRONMENT SYMPOSIUM (IEEES-15) İ Dinçer, Z Utlu, A Karabuğa, B Yüksel İstanbul Atlas Üniversitesi , 2024 2024
Assessment of conventional and enhanced exergy analysis of the natural gas liquefaction plant A Karabuga, Z Utlu International Journal of Exergy 44 (3-4), 175-187 , 2024 2024
Assessment of thermodynamic performance of a novelty solar-ORC configuration based hydrogen production: An experimental study A Karabuga, MZ Yakut, Z Utlu International Journal of Hydrogen Energy 48 (99), 39154-39168 , 2023 2023 Citations: 30
Parabolic Trough Solar Collector Assisted Hydrogen Production Z Utlu, H Ayarturk, A Karabuga, MZ Yakut Proceedings of the 11th Global Conference on Global Warming (GCGW 2023) , 2023 2023
Optimization of Carbon Trading and Renewable Energy Management by Using Blockchain Technology and Artificial Intelligence S Morozova, A Karabuga, Z Utlu Proceedings of the 11th Global Conference on Global Warming (GCGW 2023) , 2023 2023 Citations: 4
Two-Objective Optimization of Integrated Etsc-Based Orc for Power and Hydrogen Generation A Karabuga, H Ayarturk, MZ Yakut, Z Utlu, H Iseri, S Kilic Proceedings of the 11th Global Conference on Global Warming (GCGW 2023) , 2023 2023
Thermo-economic and thermo-environmental assessment of hydrogen production, an experimental study A Karabuga, Z Utlu, B Yuksel International Journal of Hydrogen Energy 48 (60), 23323-23338 , 2023 2023 Citations: 16
Evaluation of the thermodynamic analysis of hydrogen production from a middle-temperature intensity solar collector, a case study A Karabuga, MZ Yakut, Z Utlu International Journal of Hydrogen Energy 47 (74), 31821-31832 , 2022 2022 Citations: 15
MOST CITED SCHOLAR PUBLICATIONS
Conventional and enhanced exergy analysis of a hydrogen liquefaction system Z Utlu, A Karabuga International Journal of Hydrogen Energy 46 (2), 2296-2305 , 2021 2021 Citations: 33
Assessment of thermodynamic performance of a novelty solar-ORC configuration based hydrogen production: An experimental study A Karabuga, MZ Yakut, Z Utlu International Journal of Hydrogen Energy 48 (99), 39154-39168 , 2023 2023 Citations: 30
Exergy, economic and environmental analyses of the renewable energy assisted hydrogen, cooling and electricity production: A case study A Karabuga, Z Utlu, MZ Yakut, H Ayarturk International Journal of Hydrogen Energy 75, 253-261 , 2024 2024 Citations: 22
Renewable energy solutions for tourism A Karabuğa, MZ Yakut, G Yakut, R Selbaş, I Üçgül European Scientific Journal 11 (9), 188-194 , 2015 2015 Citations: 22
Energy and exergy analysis of waste heat and solar energy assisted for hydrogen production system: A case study A Karabuga, MZ Yakut, Z Utlu International Journal of Hydrogen Energy 75, 496-505 , 2024 2024 Citations: 17
Thermo-economic and thermo-environmental assessment of hydrogen production, an experimental study A Karabuga, Z Utlu, B Yuksel International Journal of Hydrogen Energy 48 (60), 23323-23338 , 2023 2023 Citations: 16
Evaluation of the thermodynamic analysis of hydrogen production from a middle-temperature intensity solar collector, a case study A Karabuga, MZ Yakut, Z Utlu International Journal of Hydrogen Energy 47 (74), 31821-31832 , 2022 2022 Citations: 15
Exergy and economic approaches for integrating power and green hydrogen production with a novel solar-ORC system A Karabuga, Z Utlu, MZ Yakut Thermal Science and Engineering Progress 61, 103552 , 2025 2025 Citations: 12
DESIGN, ENERGY AND EXERGY ANALYSES OF LINEAR FRESNEL REFLECTOR Y Melik, Ziya, K Arif, K Ahmet, R SELBAŞ Exergetic, Energetic and Environmental Dimensions 1, 523-532 , 2018 2018 Citations: 11
Cost reduction of integrated renewable energy sources in home energy management systems (HEMS) using particle swarm optimization ND Baghbani, H Zeynali, A Karabuga 2024 16th International Conference on Electronics, Computers and Artificial … , 2024 2024 Citations: 9
Evaluation of thermodynamic analysis of solar energy systems integrated into sustainable buildings with artificial neural network: a case study FE Tolon, A Karabuga, M Tolon, Z Utlu Procedia Computer Science Volume 158, 91-98 , 2019 2019 Citations: 9
Examination of the liquefaction system for the use of different cryogenics in terms of thermodynamic analysis A Karabuga, Z Utlu, R Selbas International Journal of Exergy 29 (1), 1-21 , 2019 2019 Citations: 6
ENERGY AND EXERGY ANALYSES OF NITROGEN LIQUEFACTION PROCESS K Arif, S Reşat, K Ahmet Exergetic, Energetic and Environmental Dimensions 1, 627-639 , 2018 2018 Citations: 6
Exergy and economic analysis of evacuated tube heat pipe solar collector and parabolic trough solar collectors based power, cooling and hydrogen production A Karabuga International Journal of Hydrogen Energy 146, 150006 , 2025 2025 Citations: 5
Thermodynamic assessment of power generation from waste heat in natural gas compressor station: A case study A Karabuga, M Iskender, B Yuksel, ES Aydin, Z Utlu, F Eti International Journal of Thermofluids 28, 101313 , 2025 2025 Citations: 5
Thermodynamic analysis of an evacuated tube solar collector system for industrial building application: A case study A Karabuga, H Ayarturk, MZ Yakut, Z Utlu, H Iseri, S Kilic International Journal of Hydrogen Energy 68, 17-26 , 2024 2024 Citations: 5
Optimization of Carbon Trading and Renewable Energy Management by Using Blockchain Technology and Artificial Intelligence S Morozova, A Karabuga, Z Utlu Proceedings of the 11th Global Conference on Global Warming (GCGW 2023) , 2023 2023 Citations: 4
Application of artificial neural network model for forecast energy efficiency of the cryogenic liquefaction system in the meaning of sustainability E Altintas, M Tolon, A Karabuga, Z Utlu International Journal of Global Warming 24 (3/4), 420-444 , 2021 2021 Citations: 4
Comparative performance and economic analysis for different clean energy and hydrogen production systems: A case study for Türkiye A Karabuga, E Cuce, PM Cuce, Z Utlu International Journal of Hydrogen Energy 201, 152933 , 2026 2026 Citations: 3
Modelling of energy and exergy analysis of ORC integrated systems in terms of sustainability by applying artificial neural network Z Utlu, M Tolon, A Karabuga International Journal of Low-carbon Technologies , 2020 2020 Citations: 3
