Evaluation of cogeneration plant with steam and electricity production based on thermoeconomic and exergoenvironmental analyses

Cavalcanti, Eduardo José Cidade; Souza, Gabriel Fernandes de; Lima, Matheus

doi:10.1504/ijex.2018.090324

Cited by 9 publications

(3 citation statements)

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“…A similar result (70.08%) was obtained in a combined cycle with 212.15 MW electricity production with multi‐effect distillation 45 . Others works indicate the same behavior, with the combustion chamber presenting the highest exergy destruction rate References [46, 47]. Boyano et al 46 studied the production of hydrogen, and the combustion chamber presented the highest exergy destruction—this component should have the highest priority for improvement from a thermodynamic point of view.…”

Section: Resultssupporting

confidence: 55%

“…Boyano et al 46 studied the production of hydrogen, and the combustion chamber presented the highest exergy destruction—this component should have the highest priority for improvement from a thermodynamic point of view. Cavalcanti et al 47 studied a cogeneration plant, and the combustion chamber showed the highest exergy destruction. This fact is due to the combustor's inherent nature, which destroys the higher value of fuel chemical exergy converting into thermal exergy.…”

Section: Resultsmentioning

confidence: 99%

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Energetic and exergetic performances of a multi‐effect desalination unit driven by a gas turbine

Cavalcanti,

Santos,

Carvalho

2023

Env Prog and Sustain Energy

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Desalination can provide additional water resources in water‐stressed zones and also in zones suffering from water pollution or insufficient/overexploited groundwater. This study carried out the energy and exergy assessments of a multi‐effect desalination unit driven by a gas turbine based on the specific exergy cost (SPECO) approach. The chemical exergies of brine and seawater are explicitly considered (most studies consider the same specific heat for input seawater and output brine). In addition, the enthalpy of each flow of the desalination unit is considered according to its salt concentration (results are then compared to the constant specific heat model). The highest exergy rates of fuel and product are obtained at the combustion chamber, and its exergy efficiency is 67.83%. The lowest exergy efficiencies were obtained at the condenser, followed by the first effect of the desalination unit, and the heat recovery steam generator. The overall exergy efficiency of the multi‐effect distillation unit is 21.49%. Regarding exergy destruction, as expected, the highest rate was obtained at the combustion chamber, which contributed with 41% to the overall exergy destruction, followed by the regenerator and heat recovery steam generator, with contributions of 16% and 11%, respectively, to overall exergy destruction.

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Section: Resultssupporting

confidence: 55%

Section: Resultsmentioning

confidence: 99%

Energetic and exergetic performances of a multi‐effect desalination unit driven by a gas turbine

Cavalcanti,

Santos,

Carvalho

2023

Env Prog and Sustain Energy

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“…Cavalcanti [83] applied the same methodology to an integrated solar combined gas/steam cycle system and verified that the condenser presented the lowest exergoeconomic factor. In Cavalcanti et al [84], a cogeneration system producing steam and electricity was analyzed, for which the lowest exergoeconomic factor was found for the combustor. These low f k values indicate the importance of decreasing irreversibilities in the equipment.…”

Section: D )mentioning

confidence: 99%

Exergoeconomic Assessment of a Compact Electricity-Cooling Cogeneration Unit

et al. 2020

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This study applies the SPecific Exergy COsting (SPECO) methodology for the exergoeconomic assessment of a compact electricity-cooling cogeneration system. The system utilizes the exhaust gases from a 126 hp Otto-cycle internal combustion engine (ICE) to drive a 5 RT ammonia–water absorption refrigeration unit. Exergy destruction is higher in the ICE (67.88%), followed by the steam generator (14.46%). Considering the cost of destroyed exergy plus total cost rate of equipment, the highest values are found in the ICE, followed by the steam generator. Analysis of relative cost differences and exergoeconomic factors indicate that improvements should focus on the steam generator, evaporator, and absorber. The cost rate of the fuel consumed by the combustion engine is 12.84 USD/h, at a specific exergy cost of 25.76 USD/GJ. The engine produces power at a cost rate of 10.52 USD/h and specific exergy cost of 64.14 USD/GJ. Cooling refers to the chilled water from the evaporator at a cost rate of 0.85 USD/h and specific exergy cost of 84.74 USD/GJ. This study expands the knowledge base regarding the exergoeconomic assessment of compact combined cooling and power systems.

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Economic and exergoeconomic investigation of 660 MW coal-fired power plant

Nikam

Jilte

2020

J Therm Anal Calorim

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Evaluation of cogeneration plant with steam and electricity production based on thermoeconomic and exergoenvironmental analyses

Cited by 9 publications

References 0 publications

Energetic and exergetic performances of a multi‐effect desalination unit driven by a gas turbine

Energetic and exergetic performances of a multi‐effect desalination unit driven by a gas turbine

Exergoeconomic Assessment of a Compact Electricity-Cooling Cogeneration Unit

Economic and exergoeconomic investigation of 660 MW coal-fired power plant

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