Gas Turbine Inlet Articles & Analysis
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Exergy analysis of a syngas fuelled cogeneration cycle for combined production of power and refrigeration
This communication presents a biomass fuelled cogeneration cycle for the combined production of power and refrigeration. The system is an integration of combined gas–steam cycle and absorption refrigeration cycle. A thermodynamic analysis through energy and exergy is employed, to investigate the effects of cycle pressure ratio, gas turbine inlet temperature and evaporator temperature on first–law ...
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Thermodynamic and economic assessments of gas turbine inlet air-cooling by evaporative technique
In this study, the effects of gas turbine inlet air-cooling by evaporative technique on work output and thermal end exergy efficiency were analysed. These analyses are performed with the use of per unit volumetric flow, which is fixed regardless of atmospheric air conditions. In addition, a simple and effective model is developed for the economic analysis of evaporative cooling. As a case study, ...
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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 ...
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Modelling and exergoeconomic optimisation of a gas turbine with absorption chiller using evolutionary algorithm
In this paper, thermodynamic modelling of a gas turbine cycle with absorption chiller is performed. A thermoeconomic approach is utilised to find the most optimal values of design parameters for practical applications. Some design parameters considered are compressor pressure ratio, compressor isentropic efficiency, gas turbine isentropic efficiency, gas turbine inlet temperature, HRSG pressure, ...
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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 ...
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Performance enhancement of GT–ST power plant with inlet air cooling using lithium bromide/water vapour absorption refrigeration system
Performance improvement techniques in power generation systems especially in gas turbine–steam turbine (GT–ST) combined cycle (CC) power plants by compressor inlet air cooling prove to be much improvising. In this work, the performance enhancement of CC power plant by inlet air cooling method using lithium bromide–water (LiBr/H2O) absorption refrigeration system powered by waste heat from heat ...
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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 ...
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More Power & Efficiency on a 7FA in the Middle East at 50°C Case Study
Powerphase collaborated with the Tamimi Group of Companies and Saudi Electricity Company (SEC) to demonstrate Turbophase system’s ability to boost F-class gas turbine (GT) power output at the high ambient air temperatures that Saudi Arabian summers are known for. Besides having hot summers, Saudi Arabian labor costs are high such that any technology that reduces plant downtime can help ...
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Modelling and exergoeconomic based design optimisation of combined power plants
In this research a combined cycle power plant (CCPP) which can provide 80 MW of electrical power has been studied. The design parameters of the plant were chosen as: compressor pressure ratio, compressor isentropic efficiency, gas turbine isentropic efficiency, and turbine inlet temperature, pinch difference temperature, steam turbine inlet temperature, steam turbine isentropic efficiency, ...
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Thermodynamic analysis of an integrated gasification combined cycle power plant: effect of nitrogen supply on system performance
A comprehensive thermodynamic analysis of a conceptual integrated coal gasification combined cycle power plant is presented. Energy and exergy efficiencies and exergy destructions of each sub–unit are calculated. The effect of nitrogen, which is supplied from the Air Separation Unit (ASU) of the gasification unit to the combustion chamber of the gas turbine (GT) cycle, on system performance is ...
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The effect of precooling inlet air on CHP efficiency in natural gas pressure reduction stations
Almost all pressure reduction stations in Iran use expansion valves to reduce the natural gas pressure, which leads to wasting large amount of exergy. In this paper, a system is proposed which includes the modification of a conventional pressure reduction station with the addition of a turbo expander and a gas turbine for power recovery and generation. The next step is investigating the effect of ...
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