Performance analysis of an integrated gas-, steam- and organic fluid-cycle thermal power plant

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

doi:10.1016/j.energy.2017.01.107

Cited by 32 publications

(8 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The results show that the overall power output from the integrated plant increased by about 9.1 %, with about a 13.3 % maximum reduction in fuel consumption and, most importantly, an increase in the sustainability index of nearly 8.4 %. A similar study was presented by Oko and Njoku [3], where waste exhaust heat from parallel topping BCYs was used to drive two subsystems, a Rankine cycle with an organic Rankine cycle. Different working fluids for the ORC were examined.…”

Section: Introductionmentioning

confidence: 89%

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

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.

show abstract

Section: Introductionmentioning

confidence: 89%

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

show abstract

“…where 𝑐̅ 𝑝,𝑃 (𝑘𝑔/𝑘𝐽𝐾) is the average specific heat capacity of the combustion products at constant pressure and 𝜂 𝑐𝑜𝑚 (−) is combustor efficiency associated with heat transfer loss and dissociation of products at elevated temperature (𝜂 𝑐𝑜𝑚 ~0.85 is adopted as regard the boiler efficiency [52]). It is expected that heat transfer loss in the combustor due to combined actions of conduction, radiation and convection is imminent.…”

Section: Technical Analysismentioning

confidence: 99%

Techno-economic and environmental feasibility analysis of rice husks fired energy system for application in a cluster of rice mills

Diemuodeke

Mulugetta

Imran

2021

Renewable and Sustainable Energy Reviews

View full text Add to dashboard Cite

“…The air-cooled turbo-generator does not require additional equipment for holding hydrogen and filtering water, compared with hydrogen-cooled and water-cooled turbogenerator. So the air-cooled turbo-generator is widely used in gas-steam combined cycle power station, cogeneration for its advantages, energy conservation, environmental protection, safety and reliability [1]. With the continuous improvement of the generator unit capacity, the problems of severe heating and cooling difficulties become more and more serious.…”

Section: Introductionmentioning

confidence: 99%

Influence of a Novel Stator Teeth Internal Ventilation Structure on Air-Cooled Turbo-Generator Parameters and Stator Temperature

Liu

Luo

et al. 2020

IEEE Access

View full text Add to dashboard Cite

In order to solve the problems of severe heating and cooling difficulty in the stator of air-cooled turbo-generator, a novel stator teeth internal ventilation structure with axial vents in the generator stator teeth is proposed. Based on this structure, global two-dimensional electromagnetic field models of 150MW aircooled turbo-generator with different stator teeth internal ventilation structures are established to study the influence of the axial vents of the internal ventilation structure on air gap magnetic flux density of the generator, magnetic flux density of stator teeth, stator core loss, and synchronous reactance. Furtherly, flow network models of the ventilation system with the different internal ventilation structures and fluid-heat transfer numerical models of stator with half axial and one tooth pitch of generator are established to calculate the effects of the structure on the temperature of stator winding, insulation and teeth. It can provide a new research idea for the ventilation structure of large air-cooled generator. INDEX TERMS Air-cooled turbo-generator, ventilation structure, electromagnetic field, temperature field

show abstract

Performance analysis of an integrated gas-, steam- and organic fluid-cycle thermal power plant

Cited by 32 publications

References 22 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

Techno-economic and environmental feasibility analysis of rice husks fired energy system for application in a cluster of rice mills

Influence of a Novel Stator Teeth Internal Ventilation Structure on Air-Cooled Turbo-Generator Parameters and Stator Temperature

Contact Info

Product

Resources

About