Thermodynamic Optimization of Trigeneration Power System

Worldwide, the growing demand for energy has been largely met through power cycles utilizing fossil fuels. Combined cycles, which integrate a gas turbine with a steam cycle, prove to be the best alternative due to their power generation capacity and high efficiencies. This efficiency is primarily at...

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Bibliographic Details
Published in:Energies (Basel) 2024-06, Vol.17 (12), p.3048
Main Authors: Méndez-Cruz, Ladislao Eduardo, Gutiérrez-Limón, Miguel-Ángel, Lugo-Leyte, Raúl, Sales-Cruz, Mauricio
Format: Article
Language:English
Subjects:
Case studies
Coal-fired power plants
Cogeneration power plants
Efficiency
Electric power production
Electric power systems
Environmental impact
Equipment and supplies
exergetic efficiency
Fluids
Force and energy
Gas turbines
Gases
Generators
Heat
Heat recovery systems
Heating
Mexico
Natural gas
Natural resources
Optimization
organic Rankine cycle
power output
Steam pressure
Temperature
Thermal energy
thermodynamic analysis
thermodynamic optimization
Thermodynamics
Turbines
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Summary:Worldwide, the growing demand for energy has been largely met through power cycles utilizing fossil fuels. Combined cycles, which integrate a gas turbine with a steam cycle, prove to be the best alternative due to their power generation capacity and high efficiencies. This efficiency is primarily attributed to the ability to harness exhaust gases to generate steam in the heat recovery boiler, allowing additional power generation through the steam turbine. Currently, there is a quest for the integration of low-temperature power cycles to maximize the utilization of residual thermal energy flows for power generation. Therefore, this work conducts an exergetic optimization of a power trigeneration system aimed at maximizing exergetic efficiency. This system includes a gas turbine and a steam cycle coupled with three different configurations of the Organic Rankine Cycle (ORC): a simple ORC, a supercritical ORC, and an ultracritical ORC. The ORC configurations are analyzed using eight organic working fluids, namely R1234yf, R290, R134a, R1234ze, R152a, R600a, R245fa, and R123. The results show that the maximum exergetic efficiency is achieved by using R152a in the ultracritical ORC configuration coupled with the combined cycle, achieving an exergetic efficiency of 55.79%. Furthermore, the maximum power generated is attained by the steam cycle with 85,600.63 kW and 3101.21 kW for the ultracritical ORC.
ISSN:1996-1073
1996-1073
DOI:10.3390/en17123048