turbine inlet temperature Articles
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An appraisal method of exergy cost minimisation for co-generation systems
This study introduces an exergy cost-minimisation appraisal method for a simple gas turbine co-generation system. Optimisation of a gas turbine co-generation system of the electric output class of 17 MW is examined for a variety of turbine inlet temperatures of 950–1,300°C. An optimum value of the turbine inlet temperature exists for exergy cost minimisation and is estimated to be 1,200°C since ...
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Optimisation of the part-flow evaporative gas turbine cycles based on the exergy method
The evaporative gas turbine cycle is a new high-efficiency power cycle that has reached the pilot plant testing stage. The latest configuration proposed for this cycle is known as part flow evaporative gas turbine cycle (PEvGT) in which humidification is combined with steam injection. Having advantages of both steam injected and humid air cycles, it is regarded as a very desirable plant for ...
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Exergy analysis of a natural gas fired combined cycle power generation unit
Combined cycle power generation units are becoming popular due to their higher energy conversion efficiency and reduced pollutants and greenhouse gas emissions. In the present work, exergy analysis of a natural gas fired combined cycle power generation unit is performed to investigate the effect of gas turbine inlet temperature and pressure ratio on exergetic efficiency for the plant and exergy ...
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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 ...
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Performance analysis of the different Organic Rankine Cycles (ORCs) using dry fluids
This paper presents the first and second laws of thermodynamics analysis for organic Rankine cycles (ORCs), using dry organic fluids as the working fluids. The dry organic fluids for this study were R227ea, RC318, R236fa, Isobutane, R600a, R245fa, HFE7000, R123 and R113. Effects of the operating parameters such as turbine inlet temperature and pressure on the thermal efficiency, exergy ...
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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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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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Effect of Non-Condensable Gases on geothermal power plant performance. Case study: Kizildere Geothermal Power Plant-Turkey
Non-Condensable Gases (NCGs) are natural components of geothermal fluids, and they are a source of considerable capital and operating costs for power plants. The NCG content of geothermal steam varies over the world from almost zero to as much as 25% (wt). In this work, the influence of NCGs on the thermodynamic performance of geothermal power plants is analysed for various NCG content and ...
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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 ...
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Exergy analysis of gas turbine – solid oxide fuel cell–based combined cycle power plant
Fuel cell technology is one of the promising systems for cleaner and competitive alternate power generation systems. When the high temperature fuel cells like solid oxide fuel cell and molten carbon fuel cell are integrated with the gas turbines, the total thermal efficiency of the combined cycle can be obtained greater than 60%. In the present work, thermodynamic analysis of SOFC–GT combined ...
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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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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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Exergy analysis of a combined fuel cell and Gas Turbine Power Plant with intercooling and reheating
This paper presents a comparative exergy study of the performance of various gas turbine power generation plants and a high temperature Solid Oxide Fuel Cell (SOFC). The overall system is analysed and its exergy efficiency and exergy destruction are obtained, as well as individual models of each component. The results for selected operating conditions are compared against past literature data. ...
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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 ...
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Pushing the Limits of Reengineering
Cutting-edge turbine technology enables more efficient and cleaner power generation. However, the service of advanced gas turbines is challenging—especially when parts need to be replaced. The example of a blade replacement project shows how Sulzer establishes innovative reengineering processes and contributes to a secure energy supply that causes less carbon emission. A Sulzer customer ...
By Sulzer Ltd.
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Inlet Cooling for Gas Turbines Driving Gas Gathering Compressors - Case study
Increasing Incremental Gas Flow – Pemex TURBINES LOSE EFFICIENCY AS TEMPERATURES RISE As temperatures rise, your compressor’s performance suffers, resulting in lost time and decreased production, ultimately affecting your bottom line. We’ve developed an inlet cooling process that increases horsepower density and improves production by up to 25 percent, no matter the ...
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