Condenser Pressure Influence on Ideal Steam Rankine Power Vapor Cycle using the Python Extension Package Cantera for Thermodynamics

Engineering Technology & Applied Science Research, Год журнала: 2024, Номер 14(3), С. 14069 - 14078

Опубликована: Июнь 1, 2024

This study investigates the Rankine vapor power thermodynamic cycle using steam/water as working fluid, which is common in commercial plants for generation source of rotary shaft needed to drive electric generators. The four-process version, comprises a water pump section, boiler/superheater steam turbine and condenser was considered. performance this depends on several design parameters. varied single independent variable, absolute pressure condenser, by factor 256, from 0.78125 200 kPa. peak temperature were fixed at 50 bar (5,000 kPa) 600°C, respectively, corresponding base case with value condenser's 12.5 kPa (0.125 bar). analysis performed thermodynamics software package Cantera an extension Python programming language. results suggest that over range pressures examined, logarithmic function can be deployed describe dependence input heat, net output work, efficiency condenser. Each these three metrics decreases increases. However, better choice how dryness (steam quality) end section increases rises.

Язык: Английский

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Development of Ammonia Combustion Technology for NOx Reduction

Energies, Год журнала: 2025, Номер 18(5), С. 1248 - 1248

Опубликована: Март 4, 2025

This study comprehensively reviewed the engineering theories and technologies required for using ammonia as a fuel. The slow reaction rate high NOx emissions of remain challenging issues with existing combustion technologies. Accordingly, causes these problems were analyzed results research aimed at solving commercializing examined to explore future directions development technology. equivalence ratio (ER) emerged most important factor, closely related operational stability emissions. Various technologies, such staged flameless combustion, have been attempted, but overall ER < 1, necessitating post-treatment processes. internal recirculation gases is key technology that enhances its extreme case, technology, predicted form stable combustion. supplying radicals are lacking in pure process through gases. By utilizing this, if secured control established, it believed commercialization will be possible future.

Язык: Английский

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Gliding arc plasma effect on thermal characteristics of ammonia/biogas flames

Thermal Science and Engineering Progress, Год журнала: 2025, Номер unknown, С. 103494 - 103494

Опубликована: Март 1, 2025

Язык: Английский

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Reduced-Order Modeling (ROM) of a Segmented Plug-Flow Reactor (PFR) for Hydrogen Separation in Integrated Gasification Combined Cycles (IGCC)

Processes, Год журнала: 2025, Номер 13(5), С. 1455 - 1455

Опубликована: Май 9, 2025

In an integrated gasification combined cycle (IGCC), a process produces gas stream from solid fuel, such as coal or biomass. This (syngas synthesis gas) resulting the contains carbon monoxide, molecular hydrogen, and dioxide (other gaseous components may also be present depending on gasified fuel gasifying agent). Separating hydrogen this syngas has advantages. One of methods to separate is selective permeation through palladium-based metal membrane. separation complicated it depends nonlinearly various variables. Thus, desirable develop simplified reduced-order model (ROM) that can rapidly estimate performance under operational conditions, preliminary stage computer-aided engineering (CAE) in chemical processes sustainable industrial operations. To fill gap, we here proposed procedure for one-dimensional steady plug-flow reactor (PFR) use investigate membrane (MR), produced (IGCC). model, (a feed stream) enters one side into retentate zone, while nitrogen sweep opposite neighbor permeate zone. The two zones are separated by permeable palladium surfaces selectively hydrogen. After analyzing profile base case (300 °C uniform temperature, 40 atm absolute pressure, 20 pressure), temperature module, retentate-side permeate-side pressure varied individually their influence investigated. all simulation cases, fixed targets 95% recovery 40% mole-fraction at exit demanded. module length allowed change order satisfy these targets. Other dependent permeation-performance variables investigated include logarithmic mean pressure-square-root difference, apparent permeance, efficiency factor permeation. contributions our study linked fields applications, production, gasification, analytical modeling, numerical analysis. addition separation, linear nonlinear regression models derived obtained results. work gives general insights via membranes (MR). For example, most effective improve performance. Increasing value 120 results proportional gain permeated mass flux, with about 0.05 kg/m2.h gained per 1 increase decreasing bar 0.2 causes flux exponentially 1.15 kg/m2.h. 5.11 United Nations Sustainable Development Goal (SDG) numbers 7, 9, 11, 13.

Язык: Английский

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Numerical study on influences of intake temperature and swirl ratio on in-cylinder combustion and pollutant formation characteristics of ammonia/diesel dual-fuel engine

Journal of the Energy Institute, Год журнала: 2024, Номер unknown, С. 101860 - 101860

Опубликована: Окт. 1, 2024

Язык: Английский

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Experimental investigation on the turbulence flame autoignition characteristics of ammonia in a high-temperature co-flow

Fuel, Год журнала: 2024, Номер 372, С. 132216 - 132216

Опубликована: Июнь 17, 2024

Язык: Английский

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Energy, exergy, exergoeconomic, exergy sustainability and exergoenvironmental analyses (5E) of a turbofan engine: A comparative study of hydrogen and kerosene fuels

Fuel, Год журнала: 2024, Номер 381, С. 133324 - 133324

Опубликована: Окт. 17, 2024

Язык: Английский

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The mechanism of propagation of NH3/air and NH3/H

International Journal of Hydrogen Energy, Год журнала: 2024, Номер 78, С. 1004 - 1015

Опубликована: Июль 2, 2024

The mechanism of flame front propagation in NH3/air and NH3/H2/air steady, laminar premixed flames is examined. Since the process characterised by a state chemical non-equilibrium, analysis focuses on explosive mode that introduced kinetics. chemistry expressed this one tends to lead system away from equilibrium sustains non-equilibrium state. algorithmic tools Computational Singular Perturbation method are employed, so not hindered size detailed kinetics employed. Under engine-relevant conditions stoichiometric mixture, it shown case driven reaction far closer front; latter assisted . These reactions mainly responsible for heat released, effectively feeding most exothermic reactions, which OH-consuming. ensuing activity neighbourhood maximum release rate generates upstream diffusion heat, NH2, NO, H H2, initiate ahead front. This promoted H2 addition reinforcing action these three activating another OH-producing A preliminary investigation lean mixtures indicated also present pure ammonia fuel. However, when initial significant changes observed relate prevailing lower temperatures decreased heat. findings provide novel insights with direct implications controlling optimising NH3 NH3/H2 planned engine applications. approach proposed here can be extended analysing mechanisms across more diverse spectrum fuel configurations, offering invaluable support technologies pivotal ongoing energy transition efforts.

Язык: Английский

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Experimental study of NH3/H2/Air premixed flame in a variable cross-section pipe with bluff body

International Journal of Hydrogen Energy, Год журнала: 2024, Номер 88, С. 713 - 725

Опубликована: Сен. 23, 2024

Язык: Английский

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Condenser Pressure Influence on Ideal Steam Rankine Power Vapor Cycle using the Python Extension Package Cantera for Thermodynamics

SSRN Electronic Journal, Год журнала: 2024, Номер unknown

Опубликована: Янв. 1, 2024

Язык: Английский

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