Thermodynamic Analysis and Optimization of Power Cycles for Waste Heat Recovery

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

Energies, 2024, vol. 17, issue 24, 1-27

Abstract: Improvement of energy efficiency in technological processes at industrial enterprises is one of the key areas of energy saving. Reduction of energy costs required for the production of energy-intensive products can be achieved through the utilization of waste heat produced by high-temperature thermal furnace units. Generation of electric power based on the waste heat using power cycles with working fluids that are not conventional for large power engineering, may become a promising energy saving trend. In this paper, thermodynamic analysis and optimization of power cycles for the purposes of waste heat recovery are performed. The efficiency of combining several power cycles was also evaluated. It has been established that the combination of the Brayton recompression cycle on supercritical carbon dioxide with the organic Rankine cycle using R124 allows for greater electrical power than steam-power cycles with three pressure circuits under conditions where the gas temperature is in the range of 300–550 °C and the cooling temperature of is up to 80 °C. Additionally, when cooling gases with a high sulfur and moisture content to 150 °C, the combined cycle has greater electrical power at gas temperatures of 330 °C and above. At enterprises where the coolant has a high content of sulfur compounds or moisture and deep cooling of gases will lead to condensation, for example, at petrochemical and non-ferrous metallurgy enterprises, the use of combined cycles can ensure a utilization efficiency of up to 45%.

Keywords: waste heat; energy efficiency; organic Rankine cycle; Brayton cycle; heat recovery; thermodynamic optimization (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: 2024
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

Downloads: (external link)
https://www.mdpi.com/1996-1073/17/24/6375/pdf (application/pdf)
https://www.mdpi.com/1996-1073/17/24/6375/ (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:17:y:2024:i:24:p:6375-:d:1546829

Access Statistics for this article

Energies is currently edited by Ms. Agatha Cao

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