gas turbine Articles

  • Exergetic analysis of gas turbine plants

    An exergetic analysis was performed for a 116-MW gas-turbine power plant. Mass and energy conservation laws were applied to each component of the system. Quantitative exergy balance for each component and for the whole system was considered. In this study, the exergy of a material stream is decomposed into thermal, mechanical and chemical exergy and an entropy-production flow. The effect of a ...


    By Inderscience Publishers

  • Turbine Inspection

    Recent advances in natural gas exploration and extraction technology have led to skyrocketing projections of the amount of recoverable natural gas within US borders. This energy boom will result in the expanded use of gas-fired power plants to provide electricity to US homes and businesses over the coming decades. Not only does this mean cleaner and more abundant energy for the US environment and ...


    By RF System Lab.

  • Exergy analysis of the steam-injected gas turbine

    In this paper, the effect of steam injection in the combustion chamber on the exergy efficiency of a gas turbine was investigated. Cycle exergy efficiency, net power output and exergy destruction have been calculated for different mass flow rates and temperature of the injected steam. The range of variation of the mass flow rate was between 0 and 5.24% of the design air flow rate, and the ...


    By Inderscience Publishers

  • Thermodynamic evaluation of gas turbines for cogeneration applications

    In this paper, the first and second laws of thermodynamics have been utilised to evaluate the performance of intercooled reheat regenerative gas turbine cogeneration plant. The effects of overall pressure ratio, cycle temperature ratio, pressure losses, and process steam pressure on energetic and exergetic efficiencies have been investigated. The results indicate that most of the exergy ...


    By Inderscience Publishers

  • Performance of water/steam injected gas turbine power plants consisting of standard gas turbines and turbo expanders

    The present study was done to investigate the performance differences in terms of thermal efficiency and specific power output of: combined cycle power plants with integration of low temperature regenerative heat, standard gas turbines operated in wet cycle mode, turbo expanders and steam turbines (here: alternatives); combined cycle power plants with integration of low temperature regenerative ...


    By Inderscience Publishers

  • Gas turbine performance enhancement by intake air cooling

    In this work, the influence of air cooling intake on the gas turbine performance is presented. The proposed system, together with the gas turbine, is described. A mathematical model of ACIGT (Air Cooling Intake Gas Turbine) is derived and formulated in dimensionless form from which the constraint multivariable optimisation problem was formulated. To demonstrate the effectiveness of the proposed ...


    By Inderscience Publishers

  • Energy and exergy analysis of a gas turbine power plant in Algeria

    An exergy analysis of a twin ABB GT13E2 Gas Turbines (GTs) power plant (2 ? 146.2 MW) is presented in this paper. This plant is running since 2004 at F'Krina in the northeastern part of Algeria. The analysis was performed by the flow-sheet programme, 'Cycle-Tempo'. At off-design load (83%), the plant and its apparatus conserve nearly the same design load performances. However, the performance of ...


    By Inderscience Publishers

  • Exergy analysis of gas-turbine systems with high fogging compression

    Gas-turbine cycles with high fogging compression could offer enhanced efficiency and low complexity. Whereas compression power and heat rates decrease when small amounts of water (up to 2% of air flow by mass) are injected at the machine inlet, increased injection amounts could allow implementation of regeneration, further decreasing the heat rate. In this study, an exergy analysis is carried out ...


    By Inderscience Publishers

  • Gas turbine emissions and environmental impact of efficiency boosting techniques

    In this paper, environmental impact of gas turbine power generation equipment is reviewed and emissions sources are discussed. The types of pollutants in simple cycle gas turbine power plants and the associated air quality problems are compiled. Then, airborne pollutants which are generated in the combustion turbines are described and factors affecting emission formation are discussed. Also, the ...


    By Inderscience Publishers

  • Ecological optimisation of an irreversible-closed ICR gas turbine cycle

    The ecological function is optimised for an irreversible-closed Intercooled-Recuperated (ICR) gas turbine cycle using the theory of Finite-Time Thermodynamics by searching the optimum intercooling pressure ratio and heat conductance distributions among the four heat exchangers for fixed total heat exchanger inventory and the results are compared with those at the maximum power. Numerical examples ...


    By Inderscience Publishers

  • Risk-based maintenance of gas expansion turbines in steel plant

    Unexpected failures, loss of production, higher maintenance costs and down time associated with the failures of equipment are major problems in any plant. Adopting the risk-based maintenance (RBM) approach helps in designing an alternative strategy to minimise the loss resulting from these breakdowns or failures. The methodology consists of four modules: system definition, risk assessment, risk ...


    By Inderscience Publishers

  • Optimisation of micro gas turbine by exergy, economic and environmental (3E) analysis

    This research proposes a new method for optimisation of a power generation system based on exergy fuel cost and external social cost of air pollution. A thermodynamic model is provided to estimate the outlet mass flow rates of CO2, CO, NO and NO2 for a gas turbine based on maximising the first and second law efficiencies and minimising the objective function. Results show that inclusion of the ...


    By Inderscience Publishers

  • Evaluation of Gas Turbine Startup and Shutdown Emissions for New Source Permitting

    Utility deregulation and the increase in electrical demand have led to a surge in new gas turbine-based power projects. This paper examines the regulatory issues relating to startup/shutdown emissions, emissions profiles during gas turbine startups/shutdowns, annual emissions calculations, a methodology for evaluating the air quality impacts of startup emissions, and compliance with emission ...

  • Comparative study of steam injection effects on operation of gas turbine cycles

    In the present work, gas turbine cycles are modified with steam injection between the combustion chamber exit and the gas turbine inlet. Heat recovery steam generators, utilising the exhaust gases, provide these cycles with the injected steam at saturated vapour. The irreversibility of the different composing units of the cycles and the variation of gas properties owing to steam injection as well ...


    By Inderscience Publishers

  • Thermodynamic and environmental consideration of advanced gas turbine cycles with reheat and recuperator

    The role of gas turbine power plants in electrical energy production has been considerably increased in the last two to three decades. Various methods have been proposed to improve the performance of gas turbine cycles. In this research, two methods, a reheat cycle (RC) and a cycle with a reheat and a recuperator (RHC), were investigated and compared with a simple cycle (SC). The main objective ...

  • Sensitivity analysis of component efficiencies on performance of a gas turbine cogeneration system

    The performance of a 1000 kW gas-turbine cogeneration system was evaluated in terms of performance measures, such as net power, exergy efficiency of the system, and the unit costs of electricity and steam. The efficiencies of some components that have a significant affect on the performance were taken as physical variables. Sensitivity was evaluated by introducing parameters, defined as the ratio ...


    By Inderscience Publishers

  • Exergy analysis of a gas turbine system with evaporative cooling at compressor inlet

    This paper deals with the thermodynamically modelled gas turbine consisting of Media Evaporative Cooling System (MECS) at compressor inlet for investigating the generated power, second law efficiency, and entropy generation number. The parametric study using this model shows effects of ambient conditions, compressor and turbine inlet temperature, and pressure ratio on the gas turbine power and ...


    By Inderscience Publishers

  • Application of reactor net models for the simulation of gas-turbine combustor emissions

    The work deals with the evaluation of applicability of reactor net models and different reaction mechanisms for the predictions of emission characteristics of aero-engine combustors operating both in diffusion and in homogeneous burning modes. It is shown that the accuracy of the calculations of emission indices for NO x , CO and unburned hydrocarbons (UHC) is dependent strongly on the applied ...


    By Inderscience Publishers

  • Energy and exergy analysis of reverse Brayton refrigerator for Gas Turbine power boosting

    In this study the use of Reverse Brayton cycle to boost up the power of gas turbine power plants operating in hot humid ambiance is analysed by the energy and exergy methods. The gas turbine inlet temperature is reduced by mixing the chilled air from Brayton refrigeration cycle and the main intake air stream reaching low intake temperatures. In this paper the effect of irreversibilities in the ...


    By Inderscience Publishers

  • Efficiency of a standard gas-turbine power generation cycle running on different fuels

    This paper presents a study of second-law efficiency in a standard Brayton combined cycle power generation, using several paraffinic fuels ranging from methane to heptane. The main objective of the study was to identify a trend with the number of carbon atoms in the compound. In this way, a qualitative criterion can be built to evaluate the properties of poor-quality gas turbine fuels containing ...


    By Inderscience Publishers

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