Exergoeconomic performance optimization for an endoreversible regenerative gas turbine closed-cycle cogeneration plant



Document title: Exergoeconomic performance optimization for an endoreversible regenerative gas turbine closed-cycle cogeneration plant
Journal: Revista mexicana de física
Database: PERIÓDICA
System number: 000345214
ISSN: 0035-001X
Authors: 1
1
1
Institutions: 1Naval University of Engineering, Postgraduate School, Wuhan, Hubei. China
Year:
Season: Jun
Volumen: 55
Number: 3
Pages: 192-200
Country: México
Language: Inglés
Document type: Artículo
Approach: Analítico, teórico
Spanish abstract Se investigo el desempeno en tiempo finito de una planta de cogeneracion de gas turbina endoreversible regenerativo de ciclo cerrado acoplado con una reserva de temperatura termal constante. Se deduce la formula analıtica para la razon de ganancia y eficiencia de energıa de la planta de cogeneracion con las perdidas de resistencia en calor, frıo y lado-consumidor intercambiadores termales y regeneradores, respectivamente. Mediante calculos numericos, la asignacion de conductor termal entre los cuatro intercambiadores termales y de taza de presion del compresor es optimizada tomando como objetivo la maxima taza de ganancia. Se investiga las caracterısticas de las dimensiones optimas de taza de ganancia versus la energıa eficiencia correspondiente, ası como los efectos de los parametros sobre el desempeno optimo de la planta de cogeneracion. Los resultados demuestran que existe un solo grupo de optimo de conductores termales entre los cuatro intercambiadores y una de taza de presion del compresor optima que resultan en las dimensiones maximas de la taza de ganancia, y que existe una temperatura optima de lado-consumidor que resulta con una taza de ganancia de dimensiones doble-maxima
English abstract Finite time exergoeconomic performance of an endoreversible regenerative gas turbine closed-cycle cogeneration plant coupled to constant temperature heat reservoirs is investigated. The analytical formulae about profit rate and exergy efficiency of the cogeneration plant with the heat resistance losses in the hot-, cold- and consumer-side heat exchangers and the regenerator are deduced, respectively. By means of numerical calculations, the heat conductance allocation among the four heat exchangers and pressure ratio of the compressor are optimized by taking the maximum profit rate as the objective. The characteristic of optimal dimensionless profit rate versus corresponding exergy efficiency is investigated and the effects of design parameters on optimal performance of the cogeneration plant are also analyzed. The results show that there exist a sole group of optimal heat conductance allocations among the four heat exchangers and an optimal pressure ratio of the compressor which lead to the maximum dimensionless profit rate, and there exists an optimal consumer-side temperature which leads to double-maximum dimensionless profit rate
Disciplines: Física y astronomía
Keyword: Termodinámica y física estadística,
Termodinámica de tiempos finitos,
Desempeño exergoeconómico,
Tasa de ganancia,
Turbinas de gas
Keyword: Physics and astronomy,
Thermodynamics and statistical physics,
Finite time thermodynamics,
Exergoeconomic performance,
Profit rate,
Gas turbines
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