Performance evaluation of a combined cycle power plant integrated with organic Rankine cycle and absorption refrigeration system

Njoku, Ifeanyi Henry; Oko, C.O.C.; Ofodu, J. C.

doi:10.1080/23311916.2018.1451426

Cited by 13 publications

(3 citation statements)

References 46 publications

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“…The obtained results indicate that the integrated system recorded efficiency of approximately 85 %, CO2 emission reduction per MWh of about 51.5%, life cycle cost of $66 million, and a break-even period of 1.38 years. Njoku et al [2] presented an integrated system that comprises an ORC, an absorption refrigeration cycle, and a BCY. The study utilizes waste exhaust heat from three parallel toppings BCYs to drive the subsystems.…”

Section: Introductionmentioning

confidence: 99%

Environmental assessment and CO2emissions of Brayton cycle configurations based on exergo-sustainability, economic and ecological efficiency using multi-criteria optimization technique

Abam,

Okon,

Edem

et al. 2024

futech

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The performance indicators of Brayton cycle configurations (BCY) for the topping cycle application are presented. The indicators include exergy efficiency, ecological efficiency, sustainability index, environmental impact, and economic parameters. The study's objective is to access the key indicators of sustainability and investment cost to provide valid information for the choice of GT configuration as topping cycles. Five BCY configurations (Model 1 to Model 5) were studied. The maximum exergy efficiency of 28 % was obtained across the studied models. In addition, the waste exergy ratios, environmental effect factors, and CO2 emissions were determined for each model. The CO2 emissions were found to vary from 102.8 to 168 kg/MWh. Model 1 and Model 5 had the highest payback periods of 2.3 and 3.6 years, respectively, with the least unit cost of energy. Similarly, the highest cost of investment was obtained with Model 5. Results from the TOPPIS analysis show that the closeness to the final positive ideal solution varied from 0.218 to 0. 56 across the BCYs. The best model close to ideality was model 5 and thus ranked first and based principally on economic, technical, and environmental sustainability. Furthermore, the optimization results show that there are prospects for system retrofitting.

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Section: Introductionmentioning

confidence: 99%

Environmental assessment and CO2emissions of Brayton cycle configurations based on exergo-sustainability, economic and ecological efficiency using multi-criteria optimization technique

Abam,

Okon,

Edem

et al. 2024

futech

View full text Add to dashboard Cite

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“…The gas turbine exhaust, typically at a temperature of 500-600°C [10] is used to raise steam in the HRSG; this steam is then used in steam turbine to drive a generator. The turbine exhaust has unused oxygen content and it is possible to burn additional fuel in the boiler to raise steam output; this supplementary firing is most used with gas turbine operating at a relatively low exhaust gas temperature [11]. The exhaust from the HRSG may be used in processes such as paper drying, brewing, heating of building, sterilizing or for preheating combustion air for the furnace at a carbon baking facility, this is referred to as Cogeneration or combined Heat and Power (CHP).…”

Section: Introductionmentioning

confidence: 99%

Thermo-economic analysis of a heat recovery steam generator combined cycle

Ighodaro¹,

Osikhuemhe²

2019

Nig. J. Tech.

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A significant amount of energy gets lost through the exhaust of simple gas turbine plants, more often than not, this energy can be used to run another power cycle or a combined heat and power setup, leading to an increase in the overall efficiency of the plant, reduce air pollution and energy wastage. In this study, a retrofitted performance analysis of incorporating a steam power cycle to the existing gas turbine cycle in Delta IV power station is carried out, the analysis is carried out using first law of thermodynamics and energy cost comparison to describe the effect of combining both cycles on power output, thermal efficiency and energy cost. Operating data were obtained from existing gas thermal plant in Ughelli (Delta IV) and steam thermal plant in Lagos (Egbin). Preliminary assessment shows that power output increases by a further 51.5MW, thus raising the overall combined efficiency to 41.85%. Analysis on cost savings accruable from incorporating a heat recovery steam generation was also done and significant savings in cost was obtained.

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“…A lot of studies have been conducted on the utilization of the exhaust gas heat from thermal power plants to power organic Rankine cycle plants for further power generation. Tri-generation systems such as combined gas-and steamturbine cycle power plant (CCPP) integrated with organic Rankine cycle (ORC) and absorption refrigeration cycle (ARC) [4] have also been developed.…”

Section: Introductionmentioning

confidence: 99%

Cooperation of the Organic Rankine system with a cogeneration steam power plant - case study

Bryszewska-Mazurek

Mazurek

2018

E3S Web Conf.

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The cooperation of the ORC system with a cogeneration steam power plant has been considered. A district heating network is supplied from a bleeder turbine. An ORC system can utilize redundant heat, especially during the summer season, when only domestic hot water needs are served. The aim of the study was a selection of an extraction steam flow to produce the maximum electric power in an ORC system and also to cover the changing heating demand in the district heating network under consideration. Various values of extraction steam flows obtained from the bleeder turbine were considered. For a given extraction steam flow, the optimum ORC size has been adjusted. The average annual efficiency of the ORC was estimated at 0,12 (for the cyclic temperatures 120/35°C). The shortest simple payback time has been estimated at 4 years, assuming that heat from the bleeder turbine meats the heating demand throughout the year and thus the ORC system also operates throughout the year.

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Performance evaluation of a combined cycle power plant integrated with organic Rankine cycle and absorption refrigeration system

Cited by 13 publications

References 46 publications

Environmental assessment and CO2emissions of Brayton cycle configurations based on exergo-sustainability, economic and ecological efficiency using multi-criteria optimization technique

Environmental assessment and CO2emissions of Brayton cycle configurations based on exergo-sustainability, economic and ecological efficiency using multi-criteria optimization technique

Thermo-economic analysis of a heat recovery steam generator combined cycle

Cooperation of the Organic Rankine system with a cogeneration steam power plant - case study

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