The Most Powerful Power-Generating GTUs (a Review)

Ольховский, Г. Г.

doi:10.1134/s0040601521060069

Cited by 16 publications

(7 citation statements)

References 1 publication

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“…The groups included in expression (15) of criteria and parameters describe the following: the rate of chemical reaction; the rate of heat emission as a result of chemical reaction; the intensity of phase transformation processes in the combustion chamber-p k ; T K ; T Z ; E S ; α; type of fuel; convective energy transfer rate of the substance; and the amount of movement through the reaction volumes of the combustion chamber and the hearth supporting its combustion at the boundary of its failure, G V p , λ 0 [1,3,[25][26][27]. At maximum α, the optimum value of the relative swirl capacity is determined with µ − F 3 .…”

Section: Calculation Methodology For Unsteady Combustion In the Combu...mentioning

confidence: 99%

Analysis of the Exothermic Reaction of Flame Ignition in the Combustion Chamber of a Gas Turbine Unit

Maspanov,

Bogov,

Martynenko

et al. 2023

Energies

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This article analyses the exothermic reaction of flame ignition in the combustion chamber of a gas turbine unit, which is characteristic of combustion chambers operating on traditional hydrocarbon fuels. The combustion of gases as an explosive process in confined and semi-enclosed areas remains a poorly understood section of thermal physics. Without a detailed review of the physical and chemical processes taking place in the combustion chamber, it cannot be said whether the gas turbine unit will run sustainably. It is also important to know what combustion modes are in principle possible after a loss of stability in the combustion chamber in order to take action against this in advance. To describe flame ignition and quenching in the flow of the fuel–air mixture through a combustion chamber, a system of differential conservation equations of energy and reactive species supplemented with the equation of state is used. Nonstationary combustion processes in gas-turbine engines were studied, and flame ignition and blow-off were determined by the heat balance and by the continuity of chemical processes. Calculation methodologies for various operating modes of the combustion chamber of a gas turbine unit are developed and realized. The results of the calculations that were carried out are presented with graphical interpretation and with their analysis provided in sufficient detail. Based on this analysis, recommendations are then provided. From the graphs, it can be observed that the combustion chamber of a gas turbine unit reaches its maximum limit of stable operation at the optimum value of the reduced flow velocity in the openings of the air supply to the combustion and the mixing zones of the flame tube (λOC)opt = 0.22 when the fuel–air mixture is at maximum depletion, ensuring that combustion does not stop and flame failure does not occur. The topic of this article relates to the intensification of hydrocarbon fuel combustion and the technological improvement of combustion chambers in gas turbine units. This topic is of exceptional importance and relevance, emphasizing its significance. The purpose of this work is to develop and implement a methodology for calculating various modes of operation of the combustion chamber of a gas turbine unit.

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Section: Calculation Methodology For Unsteady Combustion In the Combu...mentioning

confidence: 99%

Analysis of the Exothermic Reaction of Flame Ignition in the Combustion Chamber of a Gas Turbine Unit

Maspanov,

Bogov,

Martynenko

et al. 2023

Energies

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“…Recently, the development of heat resistant alloys, hot gas path cooling systems and thermal barrier coatings has allowed a working flow temperature increase from 800 to 1650 • C [10,11]. Foreign advanced CCGT facilities have recently reached net efficiency of 63-64% [12,13].…”

Section: Increasing Efficiency Of the Binary Power Cyclesmentioning

confidence: 99%

“…Foreign advanced CCGT facilities have recently reached net efficiency of 63-64% [12,13]. CCGT facilities based on the 9HA02 or M701JAC Gas Turbines (GT) have electric net efficiency above 64% [11,14,15], which is the highest performance among the commercially available gas fuel power production technologies.…”

Section: Increasing Efficiency Of the Binary Power Cyclesmentioning

confidence: 99%

“…In particular, the gas turbine unit GTE-110 [38] has been developed and is being tested. But the main manufacturers of large power production GTs are the following companies: Siemens energy (Munich, Germany), General Electric-GE (Boston, MA, USA), Alstom Power (Saint-Ouen, France), Mitsubishi Heavy Industries-MHI (Tokyo, Japan), Ansaldo Energia (Genoa, Italy) [11].…”

Section: Aircooled Gas Turbine Modelmentioning

confidence: 99%

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Research and Development of Trinary Power Cycles

et al. 2022

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The most effective and environmentally safe fossil fuel power production facilities are the combined cycle gas turbine (CCGT) ones. Electric efficiency of advanced facilities is up to 58% in Russia and up to 64% abroad. The further improvement of thermal efficiency by increase of the gas turbine inlet temperature (TIT) is limited by performance of heat resistance alloys that are used for the hot gas path components and the cooling system efficiency. An alternative method for the CCGT efficiency improvement is utilization of low potential heat of the heat recovery steam generator (HRSG) exhaust gas in an additional cycle operating on a low-boiling heat carrier. This paper describes a thermodynamic analysis of the transition from binary cycles to trinary ones by integration of the organic Rankine cycle (ORC). A mathematical model of a cooled gas turbine plant (GT) has been developed to carry out calculations of high-temperature energy complexes. Based on the results of mathematical modeling, recommendations were made for the choice of the structure and parameters of the steam turbine cycle, as well as the ORC, to ensure the achievement of the maximum thermal efficiency of trinary plants. It is shown that the transition from a single pressure CCGT to a trinary plant allows the electric power increase from 213.4 MW to 222.7 MW and the net efficiency increase of 2.14%. The trinary power facility has 0.45% higher efficiency than the dual pressure CCGT.

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“…The main consumer of this fuel is high-temperature installations varying from electricity generation to steel and glass production. These devices need high temperatures for the operation (glass, steel production) as well as for the higher efficiency coefficient (power generation) [2]. In these cases, flue gas temperature can reach 1200°C.…”

Section: Introductionmentioning

confidence: 99%

Steam Methane Reforming in a Swirling Flow: Effect of Reformer Design Parameters

Karpilov

Mustafin

2023

ARFMTS

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Climate change is mostly driven by extensive fossil fuel combustion. Therefore, the transition to clean energy sources and energy efficiency technologies are of great importance. Thermochemical regeneration (TCR) is a method of combined energy efficiency improvement and clean fuel production. Reactor design has a significant impact on the process efficiency and therefore is a key parameter. In the present study, three different reactor geometries were considered: cylinder, square-shaped tube and complicated cylinder. Ansys Fluent was used to model the steam methane reforming reactions in porous media. The influence of the reactor shape on the operating conditions (pressure, velocity, temperature, CH4 conversion) was assessed. Complicated cylindrical shape produced the highest amount of H2 but had the highest pressure drop. Square-shaped tube performed better from the production of H2 per unit of pressure drop perspective. Moreover, the effect of swirled flow on the process performance was studied. In summary, the effective reformer design was chosen and swirl flow suggestions were proposed.

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The Most Powerful Power-Generating GTUs (a Review)

Cited by 16 publications

References 1 publication

Analysis of the Exothermic Reaction of Flame Ignition in the Combustion Chamber of a Gas Turbine Unit

Analysis of the Exothermic Reaction of Flame Ignition in the Combustion Chamber of a Gas Turbine Unit

Research and Development of Trinary Power Cycles

Steam Methane Reforming in a Swirling Flow: Effect of Reformer Design Parameters

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