- PII
- 10.31857/S0002331024010091-1
- DOI
- 10.31857/S0002331024010091
- Publication type
- Article
- Status
- Published
- Authors
- Volume/ Edition
- Volume / Issue number 1
- Pages
- 70-81
- Abstract
- Combined-cycle plants operating on natural gas are today one of the most efficient and environmentally friendly energy systems. High energy efficiency and low specific emissions are achieved primarily due to the high average integral temperature of heat supply in the Brayton-Rankine cycle. In this case, the main sources of energy losses are heat losses in the condenser of a steam turbine unit and heat losses with the exhaust gases of the waste heat boiler. This work is devoted to the thermodynamic analysis of the transition from traditional binary cycles to trinary ones, in which, in addition to the gas and steam-water circuits, there is an additional circuit using a low-boiling coolant. Based on the results of the thermodynamic optimization of the structure and parameters of thermal circuits, it was established that the use of an organic Rankine cycle with R236ea freon to utilize the low-grade heat of exhaust gases of a power plant operating with a gas turbine GTE-160 allows achieving a net electrical efficiency of 51.3%, which is higher the efficiency of single-circuit CCGT units with similar initial parameters is by 2.2% and double-circuit CCGT units by 0.5%. The increased level of energy efficiency is due to an increase in the thermal efficiency of the steam turbine part due to the addition of low-pressure heaters, as well as the effective utilization of heat from exhaust gases in a circuit with a low-boiling coolant.
- Keywords
- парогазовая установка тринарный цикл органический цикл Ренкина энергоэффективность
- Date of publication
- 14.09.2025
- Year of publication
- 2025
- Number of purchasers
- 0
- Views
- 15
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