Thermodynamic Analysis of Combined-Cycle Power Plants Incorporating an Organic Rankine Cycle and Supplementary Burners

Vladimir Kindra, Igor Maksimov (), Roman Zuikin, Aleksey Malenkov and Andrey Rogalev
Additional contact information
Vladimir Kindra: Department of Innovative Technologies for High-Tech Industries, National Research University “Moscow Power Engineering Institute”, 111250 Moscow, Russia
Igor Maksimov: Department of Innovative Technologies for High-Tech Industries, National Research University “Moscow Power Engineering Institute”, 111250 Moscow, Russia
Roman Zuikin: Department of Innovative Technologies for High-Tech Industries, National Research University “Moscow Power Engineering Institute”, 111250 Moscow, Russia
Aleksey Malenkov: Department of Innovative Technologies for High-Tech Industries, National Research University “Moscow Power Engineering Institute”, 111250 Moscow, Russia
Andrey Rogalev: Department of Innovative Technologies for High-Tech Industries, National Research University “Moscow Power Engineering Institute”, 111250 Moscow, Russia

Energies, 2025, vol. 18, issue 22, 1-20

Abstract: Emissions reduction and energy saving at thermal power plants are crucial for energy development. This paper presents the results of thermodynamic analysis and optimization of thermal circuits of combined-cycle power plants incorporating an organic Rankine cycle and supplementary burners. It is established that at a power unit with GTE-170, the transition from a binary cycle with a double-circuit waste heat boiler to a trinary one leads to an increase in net efficiency by 0.79%. It is established that in the trinary cycle, fuel afterburning in the exhaust-gas environment leads to an increase in the net capacity of the power plant: the increase is up to 4.1% with an increase in the degree of afterburning by 0.1 at a steam temperature of 515 °C. It was revealed that the introduction of intermediate superheat provides an increase in the efficiency of the binary cycle by an average of 0.2–3%, and of the trinary cycle by 2–4%, with a change in the degree of afterburning from 0 to 0.5 at an initial steam temperature of 515 °C. The use of supplementary combustion and the organic Rankine cycle make it possible to reduce carbon dioxide emissions in combined-cycle power plants. Compared to a single-pressure combined cycle, the ORC-integrated configuration reduces specific CO 2 emissions by more than 7.5%, while supplementary fuel combustion with an increased steam inlet temperature results in a reduction of up to 10%.

Keywords: combined-cycle power plant; ORC; thermodynamic analysis; energy efficiency; trinary cycle; thermal power plant (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2025
References: Add references at CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/1996-1073/18/22/5909/pdf (application/pdf)
https://www.mdpi.com/1996-1073/18/22/5909/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jeners:v:18:y:2025:i:22:p:5909-:d:1791303

Access Statistics for this article

Energies is currently edited by Ms. Cassie Shen

More articles in Energies from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().