Thermodynamic analysis of gas turbine with air bottoming cycle

Alklaibi, A.M.; Khan, Mohammad Ashraf; Khan, Waseem Asghar

doi:10.1016/j.energy.2016.04.055

Cited by 38 publications

(14 citation statements)

References 19 publications

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“…The results obtained agree well with the thermodynamic efficiency data obtained in the studies by other authors [5], [8]. In these studies, the efficiency of the GT-ABC power plant for the gas temperature at the gas turbine inlet of 1300 °C reaches 49%.…”

Section: Resultssupporting

confidence: 90%

“…In [8], a thermodynamic analysis of the performance of a combination of topping and bottoming cycles of GT-ABC scheme was carried out for various air compression ratios from 3 to 15 in the main gas turbine cycle and from 3 to 12 in the additional bottoming cycle. The analysis reveals that the average increase in plant capacity is about 27%, although the efficiency of GT-ABC is lower than that of a gas turbine with a steam cycle.…”

Section: Introductionmentioning

confidence: 99%

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Technical-economic evaluation of medium-power gas turbine plant with air bottoming cycle

Mikheev

Potanina

2019

E3S Web Conf.

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A developed mathematical model of a gas turbine power plant with an additional air bottoming cycle to utilize heat of exhaust gases was used to carry out a technical and economic analysis. The approach used in the study is aimed at solving two types of optimization problems: (1) to determine the maximum net efficiency of the power plant and (2) to adjust the equipment and operating parameters for achieving minimum costs of electricity production. The study shows that the air bottoming cycle provides an increase in the net efficiency up to 44 - 48% and adds about 20% to the installed power capacity. The minimum costs of electric energy production estimated for different prices of fuel (natural gas) are competitive enough, so the gas turbine power plant with air bottoming cycle seems to be a promising technology for medium-power generation.

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Section: Resultssupporting

confidence: 90%

Section: Introductionmentioning

confidence: 99%

Technical-economic evaluation of medium-power gas turbine plant with air bottoming cycle

Mikheev

Potanina

2019

E3S Web Conf.

View full text Add to dashboard Cite

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“…Alklaibi et al evaluated the thermal performance of single‐stage and double‐stage ABC power plant schemes. In double‐stage ABC scheme, two bottoming cycles were considered to further decrease the amount of waste heat released to the atmosphere.…”

Section: Air Bottoming Cycle Overviewmentioning

confidence: 99%

“…Assuming a case of integrating a waste heat recovery bottoming cycle in an already existing platform, power augmentation approaches that only need variation in the bottoming cycle are of higher interest. Based on the studies listed in Table , water and steam injection in the bottoming cycle air stream, supplementary firing, pulse combustor supplementary firing, water injection using air saturator, and double‐stage ABC might achieve efficiency enhancement without any modification in the topping cycles. Among these approaches, water injection in the bottoming cycle air stream showed the highest effectiveness, while supplementary firing and double‐stage ABC results were unsatisfactory.…”

Section: Air Bottoming Cycle Overviewmentioning

confidence: 99%

A critical assessment of thermo‐economic analyses of different air bottoming cycles for waste heat recovery

Saghafifar

Gadalla

2018

Int J Energy Res

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Summary Steam turbine cycle's low operating temperature makes it suitable for waste heat recovery applications. Even though conventional combined cycles, ie, topping gas turbine and bottoming steam turbine cycles, are thermodynamically efficient, they are not the most economical alternatives for power generation with capacities less than 50 MWe. A recently proposed alternative is to utilize a bottoming gas turbine cycle in form of an air bottoming cycle. In this study, an overview of air bottoming cycle is presented. Based on the discussed studies, it is decided to further evaluate the merits of water injection in the bottoming cycle air stream by using either a humidifier or an air saturator. Thermo‐economic analysis and optimization are performed to evaluate simple and water injected air bottoming cycles against steam bottoming cycles. Results indicate that conventional combined cycles can achieve the highest thermal efficiency of about 48%. While water injected air bottoming cycle with air saturator is the most cost effective combined cycle configuration and most efficient air bottoming cycle with levelized cost of electricity and energy efficiency of 64.41 US$/MWh and 39%–40%, respectively, followed by the water injected air bottoming cycle with humidifier and simple air bottoming cycle with reported levelized cost of electricity of 65.75 US$/MWh, 66.36 US$/MWh, respectively. Steam bottoming cycle has the highest levelized cost of electricity of 68.88 US$/MWh.

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“…Most of the researchers investigated the performance of different airfoils designs and different operational conditions where analyzing the problem was based only on the parameter of first law of thermodynamics. It is essential to look at the second law of thermodynamics to form a deeper understanding of the problem, since it has shown very promising results in many applications, such as wind turbine in [34][35][36][37][38][39] and gas turbine in [40][41][42][43][44]. A numerical optimization algorithm based on CFD simulation was implemented in order to optimize the blade pitch angle in [45,46].…”

Section: Introductionmentioning

confidence: 99%

Comparative analysis of different wave turbine designs based on conditions relevant to northern coast of Egypt

Shehata

Xiao

El-Shaib

et al. 2017

Energy

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Wave energy has a great potential to solve the unrelenting energy deficiency in Egypt. The present work recommends Wells turbine as a suitable choice for the Egyptian coasts due to its simple and efficient operation under low input air flow. In addition, the possibility of extracting the wave energy from the Egyptian coasts was investigated using the oscillating water system based on real data from the site. To achieve this purpose, two-dimensional numerical models for Wells turbine airfoils, functioning under sinusoidal wave flow conditions, were built. Moreover, the running and starting characteristics under sinusoidal-flow conditions were investigated using a mathematical code. The results were discussed using the first law analysis, in addition to the second law analysis by using the entropy generation minimization method. It was found that the NACA0015 airfoil always gives a global entropy generation rate that is less than other airfoils by approximately -14%, -10.3% and -14.7% for the sinusoidal wave with time periods equal to 4, 6 and 8 seconds respectively. Moreover, the effects of blade profile, time period and solidity on the output power (kW) value were discussed

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Thermodynamic analysis of gas turbine with air bottoming cycle

Cited by 38 publications

References 19 publications

Technical-economic evaluation of medium-power gas turbine plant with air bottoming cycle

Technical-economic evaluation of medium-power gas turbine plant with air bottoming cycle

A critical assessment of thermo‐economic analyses of different air bottoming cycles for waste heat recovery

Comparative analysis of different wave turbine designs based on conditions relevant to northern coast of Egypt

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