Gas turbine performance at varying ambient temperature

De, Ashley; Zubaidy, Sarim Al

doi:10.1016/j.applthermaleng.2011.04.045

Cited by 147 publications

(50 citation statements)

References 12 publications

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“…A drop in the mass flow rate of the air enters to the GT occurs due to the decrease in the density of the inlet air to the compressor [29]. At the same time, there are decreases in the power output due to the increase in the work required to compress the hot air in the compressor of the GT [30]. When the temperature of the air falls, there is an opposite effect [31].…”

Section: Resultsmentioning

confidence: 97%

Optimum Performance Enhancing Strategies of the Gas Turbine Based on the Effective Temperatures

Ibrahim

Rahman

Ali

et al. 2016

MATEC Web of Conferences

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Gas turbines (GT) have come to play a significant role in distributed energy systems due to its multi-fuel capability, compact size and low environmental impact and reduced cost. Nevertheless, the low electrical efficiency, typically about 30% (LHV), is an important obstruction to the development of the GT plants. New strategies are designed for the GT plant, to increase the overall performance based on the operational modeling and optimization of GT power plants. The enhancing strategies effect on the GT power plant's performance (with intercooler, twoshaft, reheat and regenerative) based on the real power plant of GT. An analysis based on thermodynamics has been carried out on the modifications of the cycle configurations' enhancements. Then, the results showed the effect of the ambient and turbine inlet temperatures on the performance of the GT plants to select an optimum strategy for the GT. The performance model code to compare the strategies of the GT plants were developed utilizing the MATLAB software. The results show that, the best thermal efficiency occurs in the intercooler-regenerative-reheated GT strategy (IRHGT); it decreased from 51.5 to 48%, when the ambient temperature increased (from 273 to 327K). Furthermore, the thermal efficiency of the GT for the strategies without the regenerative increased (about 3.3%), while thermal efficiency for the strategies with regenerative increased (about 22%) with increased of the turbine inlet temperature. The lower thermal efficiency occurs in the IHGT strategy, while the higher thermal efficiency occurs in the IRHGT strategy. However, the power output variation is more significant at a higher value of the turbine inlet temperature. The simulation model gives a consistent result compared with Baiji GT plant. The extensive modeling performed in this study reveals that; the ambient temperature and turbine inlet temperature are strongly influenced on the performance of GT plant.

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Section: Resultsmentioning

confidence: 97%

Optimum Performance Enhancing Strategies of the Gas Turbine Based on the Effective Temperatures

Ibrahim

Rahman

Ali

et al. 2016

MATEC Web of Conferences

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“…Such an approach has been widely used in similar previous works (see, for instance, [8,[11][12][13][14]19,22,26]). It is assumed the changes in the ambient conditions and their effect on the gas turbine performance and components parameters would not affect the steady-state behavior of the power system.…”

Section: Description Unit Valuementioning

confidence: 99%

“…Each of these types of gas turbine has a power generation capacity of 160 MW and 265 MW, respectively. De Sa and Al Zubaidy [12] reported that for every 1 • C rise in ambient temperature above ISO conditions, the units lose 0.1% in terms of thermal efficiency and 1.47 MW of its gross (useful) power output. Al-Fahed et al [8] focused on the effect of ambient air temperature and relative humidity on the performance of a gas turbine cogeneration system under Kuwait summer climate conditions.…”

Section: Capacity (Mw)mentioning

confidence: 99%

“…They reported that due to weather variation, the maximum electricity production losses were 20%, 18% and 17.5% of ISO production in Riyadh, Ad Dammam and Jeddah, respectively. De Sa and Al Zubaidy [12] investigated the gas turbine performance at varying ambient temperatures for specific turbines (SIEMENS SGT 94.2 and SIEMENS SGT 94.3) installed at the Dewa Power Station located at Al Aweer, Phases II and III in Dubai, UAE. Each of these types of gas turbine has a power generation capacity of 160 MW and 265 MW, respectively.…”

Section: Capacity (Mw)mentioning

confidence: 99%

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Impact of Ambient Conditions of Arab Gulf Countries on the Performance of Gas Turbines Using Energy and Exergy Analysis

Baakeem

Orfi

Alaqel

et al. 2017

Entropy

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Abstract:In this paper, energy and exergy analysis of typical gas turbines is performed using average hourly temperature and relative humidity for selected Gulf cities located in Saudi Arabia, Kuwait, United Arab Emirates, Oman, Bahrain and Qatar. A typical gas turbine unit of 42 MW is considered in this study. The electricity production, thermal efficiency, fuel consumption differences between the ISO conditions and actual conditions are determined for each city. The exergy efficiency and exergy destruction rates for the gas turbine unit and its components are also evaluated taking ISO conditions as reference conditions. The results indicate that the electricity production losses occur in all cities during the year, except in Dammam and Kuwait for the period between November and March. During a typical day, the variation of the power production can reach 4 MW. The rate of exergy destruction under the combined effect of temperature and humidity is significant in hot months reaching a maximum of 12 MW in July. The presented results show also that adding inlet cooling systems to the existing gas turbine units could be justified in hot periods. Other aspects, such as the economic and environmental ones, should also be investigated.

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“…The literature presents several works about thermodynamics analyses of gas turbines, but most are focused to study the performance of simple gas turbines or power plants of cycle combined [10][11][12][13][14][15][16][17]. Nevertheless, most works only study one condition of operation, with the exception of [3], which establishes that the turbine inlet temperature, the drops of pressure, environmental temperature and compressor pressure ratio are parameters that change the thermal efficiency of gas turbines.…”

Section: Introductionmentioning

confidence: 99%

Parametric Analysis of a Two-Shaft Aeroderivate Gas Turbine of 11.86 MW

Leyte

Pereyra

Méndez

et al. 2015

Entropy

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The aeroderivate gas turbines are widely used for power generation in the oil and gas industry. In offshore marine platforms, the aeroderivative gas turbines provide the energy required to drive mechanically compressors, pumps and electric generators. Therefore, the study of the performance of aeroderivate gas turbines based on a parametric analysis is relevant to carry out a diagnostic of the engine, which can lead to operational as well as predictive and/or corrective maintenance actions. This work presents a methodology based on the exergetic analysis to estimate the irrevesibilities and exergetic efficiencies of the main components of a two-shaft aeroderivate gas turbine. The studied engine is the Solar Turbine Mars 100, which is rated to provide 11.86 MW. In this engine, the air is compressed in an axial compressor achieving a pressure ratio of 17.7 relative to ambient conditions and a high pressure turbine inlet temperature of 1220 °C. Even if the thermal efficiency associated to the pressure ratio of 17.7 is 1% lower than the maximum thermal efficiency, the OPEN ACCESSEntropy 2015, 17 5830 irreversibilities related to this pressure ratio decrease approximately 1 GW with respect to irreversibilities of the optimal pressure ratio for the thermal efficiency. In addition, this paper contributes to develop a mathematical model to estimate the high turbine inlet temperature as well as the pressure ratio of the low and high pressure turbines.

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Gas turbine performance at varying ambient temperature

Cited by 147 publications

References 12 publications

Optimum Performance Enhancing Strategies of the Gas Turbine Based on the Effective Temperatures

Optimum Performance Enhancing Strategies of the Gas Turbine Based on the Effective Temperatures

Impact of Ambient Conditions of Arab Gulf Countries on the Performance of Gas Turbines Using Energy and Exergy Analysis

Parametric Analysis of a Two-Shaft Aeroderivate Gas Turbine of 11.86 MW

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