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gas-turbine-power-plants
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Thermodynamic and environmental consideration of advanced gas turbine cycles with reheat and recuperator
, Article International Journal of Environmental Science and Technology ; Volume 4, Issue 2 , 2007 , Pages 253-262 ; 17351472 (ISSN) ; Ghofrani, M. B ; Sharif University of Technology
CEERS
2007
Abstract
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 and a cycle with a reheat and a recuperator, were investigated and compared with a simple cycle. The main objective of this paper is to study the performance of an simple cycle and reheat cycle under actual conditions. In this regard, all processes are treated as actual, and in particular a relatively simple and reliable approach is used to predict the amount of cooling air. The results obtained on the basis of a model developed...
Optimal Design of Induction MHD Generator for Electrical Power Generation from Exhaust of the Gas Turbine Power Plants
, M.Sc. Thesis Sharif University of Technology ; Boroushaki, Mehrdad (Supervisor)
Abstract
Today, due to increasing electricity consumption and demand, the use of conventional systems such as thermal, hydro and nuclear power plants is not enough to convert energy. Over the past century, scientists have sought to discover new technologies for exploiting different forms of energy and converting them into high-efficiency electrical energy. One of these ways is to use the phenomenon of magnetohydrodynamics (magnetic fluid dynamics) to convert thermal energy directly into electrical energy. Magnetohydrodynamics is a theoretical field that studies the dynamics of fluids with electrical conductivity. Induction magneto-hydrodynamic generators use ionized hot plasma (a quasi-neutral gas of...
Comparative evaluation of advanced gas turbine cycles with modified blade cooling models
, Article 2006 ASME 51st Turbo Expo, Barcelona, 6 May 2006 through 11 May 2006 ; Volume 4 , 2006 , Pages 537-546 ; 0791842398 (ISBN); 9780791842393 (ISBN) ; Khaledi, H ; Hajilouy Benisi, A ; Sharif University of Technology
2006
Abstract
Advanced gas turbine cycles use advanced blade cooling technologies to reach high turbine inlet temperature. Accurate modeling and optimization of these cycles depend on blade cooling model. In this study, different models have been used to simulate gas turbine performance. The first model is the continuous model and the second is stage-by-stage model with alternative methods for calculating coolant, stagnation pressure loss and SPR. Variation of specific heat and enthalpy with temperature are included in both models. The composition of gas stream in turbine is changed step by step due to air cooling. These models are validated by two case study gas turbine results, which show good agreement...
Energy and exergy analysis of a gas turbine power plant with inlet evaporating cooling systems
, Article 23rd International Conference on Efficiency, Cost, Optimization, Simulation, and Environmental Impact of Energy Systems, 14 June 2010 through 17 June 2010 ; Volume 4 , 2010 , Pages 203-210 ; 9781456303181 (ISBN) ; Karimi, M ; Ahmadi, P ; Ecole Polytechnique Federale de Lausanne; Schweizerische Eidgenossenschaft ; Sharif University of Technology
Aabo Akademi University
Abstract
The gas turbine (GT) is known to feature low capital cost to power ratio, high flexibility, high reliability without complexity, short delivery time, early commissioning and commercial operation and fast starting-accelerating. Hence, researchers all over the world are working to increase the output power and efficiency of gas turbine cycle. One of the important techniques to increase the output power of such cycles is the compressor inlet air cooling method. The objective of this paper is to analysis the gas turbine cycle from both energy and exergy point of view. Thus, two important methods for increasing the output power, i.e. fog and media inlet air cooling systems are discussed....
Optimal electricity supply system under iranian framework limitations to meet its emission pledge under the Paris climate agreement
, Article International Journal of Sustainable Energy Planning and Management ; Volume 30 , 2021 , Pages 75-96 ; 22462929 (ISSN) ; Maleki, A ; Sharif University of Technology
Aalborg University press
2021
Abstract
As part of its Paris Agreement commitment, Iran pledged to decrease 4 % of its carbon dioxide (CO2) emissions from 2020 to 2030. About 29% of total emission in Iran belongs to electricity supply while energy consumption in other sectors (transport, household, and industry) have a lower share in CO2 emission. The main concern here is finding the optimal mix of power plants in the electricity supply system that should be deployed to meet Iran’s mentioned respective targets and considering simultaneously interests of consumers and producers in this energy system. So, we developed a non-linear mathematical programming model for Iran’s electricity system to address this concern with changing...
Exergy cost analysis of soil-plant system
, Article International Journal of Exergy ; Volume 38, Issue 3 , 2022 , Pages 293-319 ; 17428297 (ISSN) ; Saboohi, Y ; Valero, A ; Azamian, S ; Sharif University of Technology
Inderscience Publishers
2022
Abstract
In this paper, inspired by a gas turbine power plant, the interaction between plant-soil processes has been simulated. It is aimed to indicate that solar energy in the photosynthesis process is equivalent to the fuel in combustion chambers. In the glucose production process, when solar exergy is considered as a fuel, 99.4% of total exergy cost is supplied by solar exergy and only 0.6% of the exergy cost is provided by nutrients’ content. In general, 30% of the total exergy entering the Calvin cycle is consumed in glucose production and the remaining 70% is related to biomass generation (as flue gas in the gas turbine). Moreover, 98% of the total exergy cost of the soil box is related to...
Greenhouse gas emission measurement and economic analysis of Iran natural gas fired power plants
, Article Energy Policy ; Volume 60 , 2013 , Pages 200-207 ; 03014215 (ISSN) ; Kiyoumarsioskouei, A ; Asheri, M. H ; Naemi, S ; Shahsavari Alavije, H ; Basirat Tabrizi, H ; Sharif University of Technology
2013
Abstract
This study attempts to examine the natural gas fired power plants in Iran. The required data from natural gas fired power plants were gathered during 2008. The characteristics of thirty two gas turbine power plants and twenty steam power plants have been measured. Their emission factor values were then compared with the standards of Energy Protection Agency, Euro Union and World Bank. Emission factors of gas turbine and steam power plants show that gas turbine power plants have a better performance than steam power plants. For economic analysis, fuel consumption and environmental damages caused by the emitted pollutants are considered as cost functions; and electricity sales revenue are...
Design model of axial flow compressor for high temperature power plants by latest loss models
, Article 2011 Proceedings of the 3rd Conference on Thermal Power Plants, CTPP 2011, 18 October 2011 through 19 October 2011, Tehran ; 2011 ; 9781479905911 (ISBN) ; Jouybari, H. J ; Shahhoseini, M. R ; Rad, M ; Sharif University of Technology
2011
Abstract
Design models of axial flow compressor are developed for high temperature power plants with Closed Brayton Cycle for energy conversion. in recent years, many efforts have been done for modeling and predicting of performance of these compressors on different conditions of speed and pressure ratio because of costly empirical experiments, and still are developing. The models are based on a mean-line through-flow analysis for free-vortex flow, account for the profile, secondary, end wall and tip clearance losses in the cascades. In this work, models of Lieblein, Koch-Smith, Herrig, Johnsen-Bullock, Pollard-Gostelow, Aungier, Hunter-Cumpsty, Reneau are implemented to consider single stage...
Thermo-economic-environmental multiobjective optimization of a gas turbine power plant with preheater using evolutionary algorithm
, Article International Journal of Energy Research ; Volume 35, Issue 5 , 2011 , Pages 389-403 ; 0363907X (ISSN) ; Ahmadi, P ; Ghaffarizadeh, A. R ; Saidi, M. H ; Sharif University of Technology
2011
Abstract
In this study, the gas turbine power plant with preheater is modeled and the simulation results are compared with one of the gas turbine power plants in Iran namely Yazd Gas Turbine. Moreover, multiobjective optimization has been performed to find the best design variables. The design parameters of the present study are selected as: air compressor pressure ratio (rAC), compressor isentropic efficiency (ηAC), gas turbine isentropic efficiency (ηGT), combustion chamber inlet temperature (T3) and gas turbine inlet temperature. In the optimization approach, the exergetic, economic and environmental aspects have been considered. In multiobjective optimization, the three objective functions,...
Reliability modeling and availability analysis of combined cycle power plants
, Article International Journal of Electrical Power and Energy Systems ; Volume 79 , 2016 , Pages 108-119 ; 01420615 (ISSN) ; Abbaspour, A ; Fotuhi Firuzabad, M ; Dehghanian, P ; Sharif University of Technology
Elsevier Ltd
Abstract
Power plant successful operation is always a function of its constituent sub-systems and components. Due to the current financial constraints in power industry, power plant operators are continuously facing a wide range of challenges when dealing with maintenance scheduling and asset management practices of the plant sub-systems. Knowledge on the roles and criticality of the constituent components on the plant overall performance will help in establishing the plans for its smooth, safe, and economic operation. To ensure making the techno-economical decisions on the maintenance of power plant equipment, this paper focuses on the reliability modeling of the combined cycle power plants (CCPP)....
Aging based optimal scheduling framework for power plants using equivalent operating hour approach
, Article Applied Energy ; Volume 205 , 2017 , Pages 1345-1363 ; 03062619 (ISSN) ; Mosleh, A ; Roshandel, R ; Sharif University of Technology
Elsevier Ltd
2017
Abstract
In this paper a scheduling optimization framework is developed to enhance power plants operational decision making process. The proposed framework optimizes plant schedule including operating conditions and maintenance intervals simultaneously and on an hourly basis. In a long term operation plant performance deteriorates due to components aging. This study employs equivalent operating hour (EOH) approach to describe components aging impact on the plant performance deterioration and consequently plant long term profit. Modeling of components aging increases system simulation accuracy in long term operation and the optimum decision variables would be more reliable and realistic. Validity and...
Effect of decision variables in the steam section for the exergoeconomic analysis of TCCGT power plant: A case study
, Article Energy and Environment ; Vol. 25, issue. 8 , 2014 , p. 1381-1404 ; Fani, M ; Farhanieh, B ; Abbaspour, M ; Sharif University of Technology
Abstract
In advanced combined-cycle power plants, significant improvements in the thermodynamic performance are mainly achieved by the development of more efficient gas-turbine systems. This paper evaluates the effect of selected decision variables in the steam system for optimization of Thermal Combined Cycle Gas Turbine (TCCGT) power plant using an iterative exergoeconomic. The design variables were the thermodynamic parameters that establish the configuration both of the steam and gas systems. The design data of an existing plant (Damavand power plant in Tehran-Iran) is used. Two different objective functions are proposed: one minimizes the total cost of production per unit of output, and the...
Exergy, economic & environmental (3E) analysis of inlet fogging for gas turbine power plant
, Article Energy ; Volume 36, Issue 12 , December , 2011 , Pages 6851-6861 ; 03605442 (ISSN) ; Mozafari, A ; Alibiglou, M. H ; Sharif University of Technology
2011
Abstract
In the present paper, the effects of inlet fogging system on the first and second law efficiencies are investigated for a typical power plant (Shahid Rajaee) which is located near Ghazvin in Iran. Also a new function is proposed for system optimization that includes the social cost of air pollution for power generating systems. The new function is based on the first law efficiency, energy cost and the external social cost of air pollution for an operational system. Social cost of air pollution is based on the negative effects of air pollution on the health of society and environment. The economic aspect of these effects is called external social cost of air pollution. Other pollution sources...