Akroot, A., Faraj, A. (2025). Performance and exergoeconomic assessment of of integrated organic rankine cycle with solar combined cycle system on sustainable power generation in Iraq. , 43(7), 561-576. doi: 10.30684/etj.2025.158167.1913
Abdulrazzak Akroot; Ayaa Faraj. "Performance and exergoeconomic assessment of of integrated organic rankine cycle with solar combined cycle system on sustainable power generation in Iraq". , 43, 7, 2025, 561-576. doi: 10.30684/etj.2025.158167.1913
Akroot, A., Faraj, A. (2025). 'Performance and exergoeconomic assessment of of integrated organic rankine cycle with solar combined cycle system on sustainable power generation in Iraq', , 43(7), pp. 561-576. doi: 10.30684/etj.2025.158167.1913
Akroot, A., Faraj, A. Performance and exergoeconomic assessment of of integrated organic rankine cycle with solar combined cycle system on sustainable power generation in Iraq. , 2025; 43(7): 561-576. doi: 10.30684/etj.2025.158167.1913

Performance and exergoeconomic assessment of of integrated organic rankine cycle with solar combined cycle system on sustainable power generation in Iraq

Engineering and Technology Journal
Volume 43, Issue 7, July 2025, Pages 561-576    PDF (1.46 M)
Document Type: Research Paper
DOI: 10.30684/etj.2025.158167.1913
Authors
Abdulrazzak Akroot* ; Ayaa Faraj
Mechanical Engineering Dept, Faculty of Engineering, Karabük University, 78050, Karabük, Turkey.
Abstract
This study presents a comprehensive performance and exergoeconomic assessment of a solar-driven triple combined cycle (TCC) power system integrated with a rock bed thermal storage unit and an Organic Rankine Cycle (ORC) for enhanced sustainable power generation in Iraq. The proposed system combines Brayton, Rankine, and Organic Rankine Cycle (ORC) cycles to maximize energy recovery from both high- and low-grade heat sources. The integration of the ORC unit significantly improves system efficiency by utilizing residual thermal energy that would otherwise be wasted. The analysis used Engineering Equation Solver (EES) software, incorporating monthly climatic data from Salahaddin, Iraq. Thermodynamic and exergoeconomic evaluations assessed energy efficiency, exergy destruction, component costs, and electricity production cost. Unlike previous studies, this research introduces an advanced exergoeconomic perspective, providing a more realistic assessment of technical and economic performance. Results indicate that the system achieves a power output of 12.4 MW in June, with energy and exergy efficiencies of 37.37% and 40.8%, respectively, and a unit electricity cost of $33.31 per hour. In January, the output increases to 14.17 MW with higher exergy efficiency (46.21%) but at a higher cost due to reduced solar availability. The addition of the ORC unit enhances both energy recovery and economic performance, especially during periods of low solar input, supporting the system’s viability for year-round renewable power generation.

Highlights
  • A solar triple cycle with PTCs, TES, and Brayton-Rankine-ORC improves efficiency and ensures continuous power
  • Seasonal changes affect performance; March yields 42.55 MW, while July has the lowest output and highest cost
  • Exergy destruction totals were 82.255 MW, with PTC losses at 66.93 MW and peak costs reaching $906.52 per hour
  • System optimization raises gas turbine inlet temperature and adjusts RC boiler pinch point to reduce costs
Keywords
Triple Combined Cycle (TCC); Solar power; Exergoeconomic analysis; Rock bed storage system; Iraq
References
  1. Z. Ma, G. C. Glatzmaier, C. F. Kutscher, Thermal energy storage and its potential applications in solar thermal power plants and electricity storage, ASME 2011 5th International Conference on Energy Sustainability, 2011, 447-456. https://doi.org/10.1115/ES2011-54077
  2. W. Strielkowski, L. Civin, E. Tarkhanova, M. Tvaronavi, Y. Petrenko, Renewable Energy in the Sustainable Development of Electrical, Energies, 14 (2021) 1-24. https://doi.org/https://doi.org/10.3390/en14248240
  3. H. M. Delibas, E. Kayabasi, Energy, Environment And Economy Assessment Of Waste Heat Recovery Technologies In Marine Industry, Mater. Eng. Technol., 2 (2019) 39-45.
  4. S. Kuravi, J. Trahan, D. Y. Goswami, M. M. Rahman, E. K. Stefanakos, Thermal energy storage technologies and systems for concentrating solar power plants, Prog. Energy. Combust. Sci., 39 (2013) 285-319. https://doi.org/10.1016/j.pecs.2013.02.001
  5. F. Marongiu, S. Soprani, K. Engelbrecht, et. al, Modeling of high temperature thermal energy storage in rock beds – Experimental comparison and parametric study, Appl. Therm. Eng., 163 (2019) 114355. https://doi.org/10.1016/j.applthermaleng.2019.114355
  6. S. Soprani, F. Marongiu, L. Christensen, O. Alm, K. Dinesen, T. Ulrich, K. Engelbrecht, Design and testing of a horizontal rock bed for high temperature thermal energy storage, Appl. Energy, 251 (2019) 113345. https://doi.org/10.1016/j.apenergy.2019.113345
  7. Y. Muhammad, P. Saini, K. Knobloch, H. L. Frandsen, K. Engelbrecht, Rock bed thermal energy storage coupled with solar thermal collectors in an industrial application : Simulation , experimental and parametric analysis, J. Energy Storage, 67 (2023) 107349. https://doi.org/10.1016/j.est.2023.107349
  8. N. B. Desai, M. E. Mondejar, F. Haglind, Techno-economic analysis of two-tank and packed-bed rock thermal energy storages for foil-based concentrating solar collector driven cogeneration plants, Renew. Energy, 186 (2022) 814-830. https://doi.org/10.1016/j.renene.2022.01.043
  9. G. Zanganeh, A. Pedretti, S. Zavattoni, M. Barbato, A. Steinfeld, Packed-bed thermal storage for concentrated solar power - Pilot-scale demonstration and industrial-scale design, Solar Energy, 86 (2012) 3084-3098. https://doi.org/10.1016/j.solener.2012.07.019
  10. I. Ortega-Fernández, I. Uriz, A. Ortuondo, A. B. Hernández, A. Faik, I. Loroño, J. Aseguinolaza, Operation strategies guideline for packed bed thermal energy storage systems, Int. J. Energy Res., 43 (2019) 6211-6221. https://doi.org/10.1002/er.4291
  11. T. Nahhas, X. Py, N. Sadiki, Experimental investigation of basalt rocks as storage material for high- temperature concentrated solar power plants, Renewable Sustainable Energy Rev., 110 (2019) 226-235. https://doi.org/10.1016/j.rser.2019.04.060
  12. M. Ozturk, I. Dincer, N. Javani, Thermodynamic modeling of a solar energy based combined cycle with rock bed heat storage system, Solar Energy, 200 (2020) 51-60. https://doi.org/10.1016/j.solener.2019.03.053
  13. L. Heller, P. Gauché, Modeling of the rock bed thermal energy storage system of a combined cycle solar thermal power plant in South Africa, Solar Energy, 93 (2013) 345-356. https://doi.org/10.1016/j.solener.2013.04.018
  14. A. Sharma, P. K. Pandey, M. Didwania, Techno-economic optimization of packed-bed thermal energy storage system combined with CSP plant using DOE: design of experiment technique and Taguchi method, Int. J. Energy Environ. Eng., 14 (2022) 287-308. https://doi.org/10.1007/s40095-022-00526-0
  15. A. Abdulla, K. S. Reddy, Effect of operating parameters on thermal performance of molten salt packed-bed thermocline thermal energy storage system for concentrating solar power plants, Int. J. Therm. Sci., 121 (2017) 30-44. https://doi.org/10.1016/j.ijthermalsci.2017.07.004
  16. B. Kocak, H. Paksoy, Performance of laboratory scale packed-bed thermal energy storage using new demolition waste based sensible heat materials for industrial solar applications, Solar Energy, 211 (2020) 1335-1346. https://doi.org/10.1016/j.solener.2020.10.070
  17. Çengel Y. A., and Boles M. A., Thermodynamics: An Engineering Approach, 5th ed. New York: McGraw-Hill, 2006.
  18. Moran, M. J., Shapiro, H. N. , Boettner, D. D., Bailey, M. B., Fundamentals of Engineering Thermodynamics; John Wiley & Sons, 2010.
  19. Z. Aghaziarati, A. H. Aghdam, Thermoeconomic analysis of a novel combined cooling, heating and power system based on solar organic Rankine cycle and cascade refrigeration cycle, Renew. Energy, 164 (2021) 1267-1283. https://doi.org/10.1016/j.renene.2020.10.106
  20. A. Tozlu, E. Kayabasi, H. Ozcan, Thermoeconomic analysis of a low-temperature waste-energy assisted power and hydrogen plant at off-NG grid region, Sustain. Energy Technol. Assess., 52 (2022) 102104. https://doi.org/10.1016/j.seta.2022.102104
  21. M. Ozturk, I. Dincer, N. Javani, Thermodynamic modeling of a solar energy based combined cycle with rock bed heat storage system, Solar Energy, 200 (2020) 51-60. https://doi.org/10.1016/j.solener.2019.03.053
  22. W. Talal, A. Akroot, Exergoeconomic Analysis of an Integrated Solar Combined Cycle in the Al-Qayara Power Plant in Iraq, Processes, 11 (2023) 656. https://doi.org/10.3390/pr11030656
  23. M. E. Demir, I. Dincer, Development of a hybrid solar thermal system with TEG and PEM electrolyzer for hydrogen and power production, Int. J. Hydrog. Energy, 42 (2017) 30044-30056. https://doi.org/10.1016/j.ijhydene.2017.09.001
  24. S. Barakat, A. Ramzy, A. M. Hamed, S. H. El Emam, Enhancement of gas turbine power output using earth to air heat exchanger (EAHE) cooling system, Energy Convers. Manag., 111 (2016) 137-146. https://doi.org/10.1016/j.enconman.2015.12.060
  25. K. Abudu, U. Igie, I. Roumeliotis, R. Hamilton, Impact of gas turbine flexibility improvements on combined cycle gas turbine performance, Appl. Therm. Eng., 189 (2021) 116703. https://doi.org/10.1016/J.APPLTHERMALENG.2021.116703
  26. A. Akroot, A. Nadeesh, Performance Analysis of Hybrid Solid Oxide Fuel Cell-Gas Turbine Power System, Int. J. Eng. Sci., 9 (2020) 43-51 . https://doi.org/10.9790/1813-0909014351
  27. A. Akroot, L. Namli, Performance assessment of an electrolyte-supported and anode-supported planar solid oxide fuel cells hybrid system, J. Ther. Eng., 7 (2021) 1921-1935. https://doi.org/10.14744/jten.2021.0006
  28. A. Akroot, Effect of Operating Temperatures on the Performance of a SOFCGT Hybrid System, In. J. of Trend in Sci. Res. and Development, 3 (2019) 1512-1515. https://doi.org/10.31142/ijtsrd23412
  29. A. Akroot, L. Namli, H. Ozcan, Compared Thermal Modeling of Anode- and Electrolyte-Supported SOFC-Gas Turbine Hybrid Systems, J. Electrochem. Energy Convers. Storage, 18 (2021) 011001. https://doi.org/10.1115/1.4046185
  30. K. Seshadri, Thermal design and optimization: A. Bejan, G. Tsatsaronis, and M. Moran, Wiley Interscience, John Wiley Sons Inc., New York (1996), Energy, 21 (1996) 433-434. https://doi.org/10.1016/s0360-5442(96)90000-6
  31. L. Elmorsy, T. Morosuk, G. Tsatsaronis, Exergy-based analysis and optimization of an integrated solar combined-cycle power plant, Entropy, 22 (2020) 1-20. https://doi.org/10.3390/e22060655
  32. H. Ozcan, E. Kayabasi, Thermodynamic and economic analysis of a synthetic fuel production plant via CO2 hydrogenation using waste heat from an iron-steel facility, Energy Convers. Manag., 236 (2021) 114074. https://doi.org/10.1016/j.enconman.2021.114074
  33. F. Mohammadkhani, N. Shokati, S. Mahmoudi, M. Yari, M. Rosen, Exergoeconomic assessment and parametric study of a Gas Turbine-Modular Helium Reactor combined with two Organic Rankine Cycles, Energy, 65 (2014) 533-543. https://doi.org/10.1016/J.ENERGY.2013.11.002
  34. M. Nourpour, M. H. Khoshgoftar Manesh, Evaluation of novel integrated combined cycle based on gas turbine-SOFC-geothermal-steam and organic Rankine cycles for gas turbo compressor station, Energy Convers. Manag., 525 (2022) 115050. https://doi.org/10.1016/j.enconman.2021.115050
  35. A. F. Kareem, A. Akroot, H. A. Wahhab, W. Talal, R. M. Ghazal, Exergo-Economic and Parametric Analysis of Waste Heat Recovery from Taji Gas Turbines Power Plant Using Rankine Cycle and Organic Rankine Cycle, 15 (2023) 9376. http://dx.doi.org/10.3390/su15129376
  36. A. Lazzaretto, G.Tsatsaronis, SPECO: A systematic and general methodology for calculating efficiencies and costs in thermal systems, Energy, 31 (2006) 1257-1289. https://doi.org/10.1016/j.energy.2005.03.011
  37. A. M. Elsafi, Exergy and exergoeconomic analysis of sustainable direct steam generation solar power plants, Energy Convers. Manag., 103 (2015) 338-347. https://doi.org/10.1016/j.enconman.2015.06.066
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