turbine inlet 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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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 optimisation of the combined single flash binary geothermal power plant
In this paper, the optimal operating conditions of a hypothetical combined single flash-binary geothermal power plant are investigated and performance analyses are performed based on Aydin-Germencik field in Turkey. The relationship between flashing pressure, turbine inlet pressure of the binary cycle and total heat transfer area of the heat exchanger are determined for maximum power output of ...
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Farah Hospital to save 416,085 USD per year with TES solution - Case Study
ARANER, is not only the leading company in Turbine Inlet Air Cooling and innovative District Cooling Solutions, but has also designed and implemented some of the world’s biggest Thermal Energy Storage Systems. Just as we did with Farah Hospital located in Amman (Jordan), which is considered the biggest and most prestigious hospital in the Middle East. We take on each Thermal Energy Storage ...
By Araner
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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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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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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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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 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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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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Comparative exergy analysis of ammonia–water based Rankine cycles with and without regeneration
Power generation systems using an ammonia–water mixture instead of water as working fluid have attracted much research interest over the past 20 years, since they have a potential to convert more energy in low–grade heat source into power and to improve the power generating processes in several ways. In this work comparative exergy analysis based on the second law of thermodynamics is carried out ...
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A necessary condition for optimum Rankine cycle power plants
Consumers pay more for electricity than necessary partly because commercial power plant operating criteria are not universally valid. Although such plants are commonly designed to provide electricity at least cost for given conditions, operating criteria lack a rigorous thermodynamic basis. The current empiricism alone costs US consumers billions of dollars per year. This dilemma exists because ...
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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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Phase 1 Pilot Electrical Power Generation by Ener-Core Oxidizer - Case Study
DESCRIPTION Ener-Core simulated a low energy gas (50-70 Btu/scf) produced during a proprietary drilling process at the request of a large oil and gas customer. The pilot was conducted at Ener-Core’s Test Facility, located at the University of California, Irvine. This demonstration was the first phase of the customers FP250 installation process. ENER-CORE TECHNOLOGY Ener-Core’s ...
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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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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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