Off-Design Analysis of a MCFC-Gas Turbine Hybrid Plant

2010 ◽  
Vol 7 (3) ◽  
Author(s):  
P. Iora ◽  
S. Campanari ◽  
A. Salogni
Keyword(s):  
Gas Turbine ◽  
Hybrid Plant ◽  
Design Analysis ◽  
Part Load ◽  
Turbine Performance ◽  
Partial Load ◽  
Turbine Shaft ◽  
Load Behavior ◽  
Plant Power ◽  
Plant Components

The paper presents a model for the off-design analysis of a hybrid plant based on a MCFC and a gas-turbine. The model is used to define a possible regulation strategy for the power plant, minimizing the performance decay at partial load and allowing investigation of the interaction issues among the different plant components. The hybrid plant reflects at nominal conditions the expected performances for the 500 kW-class MCFC plant proposed by Ansaldo Fuel Cells. The simulation is carried out respecting the matching of the gas-turbine and the part-load behavior of the fuel cell and the heat exchangers. The gas-turbine is modeled through compressor and turbine performance maps, and the FC is modeled through a finite volume code. The results indicate the possibility to regulate effectively the plant power output acting on the turbine shaft speed, the air-to-fuel ratio, the bypass of cathode air, and the fuel utilization, achieving very high part-load efficiency and respecting constraints on the admitted operating range for the plant components.

Part-Load Behavior of a Solar-Heated and Fossil-Fueled Gas Turbine Power Plant

1987 ◽  
Vol 109 (1) ◽  
pp. 64-70 ◽  
Author(s):  
K. Bammert ◽  
H. Lange
Keyword(s):  
Power Plant ◽  
Power Transmission ◽  
Mechanical Energy ◽  
Radiant Energy ◽  
Radiant Heat ◽  
Hybrid Plant ◽  
Inlet Temperature ◽  
Part Load ◽  
Transmission Grid ◽  
Load Behavior

Solar energy can be converted effectively into electrical or mechanical energy. The radiant heat of the sun is collected by a parabolic dish, concentrated intensely, and reflected into a cavity receiver. Air flowing through tube panels in front of the receiver inner walls absorbs the radiant energy. Downstream of the receiver is a fossil-fired combustion chamber (hybrid construction). The fuel energy is converted at a higher utilization than in a straight fossil-fueled power plant. The overall efficiency of the hybrid plant rises with increasing turbine inlet temperature. The power delivered by the turbine serves to drive the compressor and the generator. A description of the thermodynamic design of the cycle is followed by statements on the performance characteristics of the individual components and by a description of the steady-state part-load behavior of the plant considering specific conditions such as variations in solar and fossil fuel-generated heat and fluctuating load on the power transmission grid.

Part-Load Behavior of a Solar-Heated and Fossil-Fuelled Gas Turbine Power Plant

1986 ◽  
Author(s):  
K. Bammert ◽  
H. Lange
Keyword(s):  
Power Plant ◽  
Power Transmission ◽  
Mechanical Energy ◽  
Radiant Energy ◽  
Radiant Heat ◽  
Hybrid Plant ◽  
Inlet Temperature ◽  
Part Load ◽  
Transmission Grid ◽  
Load Behavior

Solar energy can be converted effectively into electrical or mechanical energy. The radiant heat of the sun is collected by a parabolic dish, concentrated intensely and reflected into a cavity receiver. Air flowing through tube panels in front of the receiver inner walls absorbs the radiant energy. Downstream of the receiver is a fossil-fired combustion chamber (hybrid construction). The fuel energy is converted at a higher utilization than in a straight fossil-fuelled power plant. The overall efficiency of the hybrid plant rises with increasing turbine inlet temperature. The power delivered by the turbine serves to drive the compressor and the generator. A description of the thermodynamic design of the cycle is followed by statements on the performance characteristics of the individual components and by a description of the steady-state part-load behavior of the plant considering specific conditions such as variations in solar and fossil fuel-generated heat and fluctuating load on the power transmission grid.

Bypass Control of Closed-Cycle Gas Turbines

1978 ◽  
Author(s):  
G. Krey
Keyword(s):  
Control System ◽  
Gas Turbine ◽  
Gas Turbines ◽  
Closed Cycle ◽  
Part Load ◽  
Control Behavior ◽  
Bypass Valve ◽  
Load Behavior

The layout of the bypass control system of a closed-cycle gas turbine depends on the steady and nonsteady part-load behavior of the plant. In the paper, the results of investigations into the operating behavior of closed-cycle gas turbines are summarized. From these a method of laying out the bypass valve is deduced. Finally, an advanced bypass control system is described and the control behavior achievable therewith is explained.

Part Load Behavior Optimization of Hybrid Coal and Gas Fired Combined Cycles Including Deactivation of Components

2002 ◽  
Author(s):  
Janpeter Ku¨hnel ◽  
Reza S. Abhari
Keyword(s):  
Power Plant ◽  
Objective Function ◽  
Gas Turbine ◽  
Mixed Integer ◽  
Operation Strategy ◽  
Part Load ◽  
Optimization Parameters ◽  
Cycle Efficiency ◽  
Load Behavior ◽  
Fuel Costs

This paper presents a methodology to optimize the part load behavior of complex power plant cycles. As free optimization parameters the traditional continuous control parameter and the activation/deactivation of defined plant components are considered resulting in a mixed integer non-linear programming problems (MINLP). The procedure starts with a continuous process on either side of the non-linearity in part load, while refining the steps as it approaches the discontinuity. It is shown that good convergence around the non-linearity can be found with the present scheme. For part load operation a number of continuous and binary free optimization parameters are available creating a challenging optimization problem. The developed procedure is applied to a conventional steam cycle power plant, which is parallel repowered with a modern gas turbine. The resulting power plant layout is a hybrid coal and gas fired combined cycle. As objective function the maximized overall thermal efficiency and the minimized fuel costs are two examples chosen. Investigating the minimized fuel costs as the objective function the optimized operation strategy is found to be an unique function of the fuel price ratio between coal and gas for the chosen layout. Finally we show, that the operation strategy can be notably improved by considering the deactivation of cycle components for minimizing the fuel costs and for maximizing the cycle efficiency. For example the cycle efficiency can be improved up to 2% by deactivating the high pressure feed water preheating. The fuel costs are reduced by 20% for a particular load point by deactivating the gas turbine.

Part-Load Performance of Gas Turbines: Part II — Multi-Point Adaptation With Compressor Map Generation and GA Optimization

2012 ◽  
Author(s):  
E. Tsoutsanis ◽  
Y. G. Li ◽  
P. Pilidis ◽  
M. Newby
Keyword(s):  
Gas Turbine ◽  
Gas Turbines ◽  
Combined Cycle ◽  
Performance Model ◽  
Part Load ◽  
Design Performance ◽  
Turbine Performance ◽  
Map Generation ◽  
Compressor Map ◽  
Performance Adaptation

Accurate gas turbine performance simulation is a vital aid to the operational and maintenance strategy of thermal plants having gas turbines as their prime mover. Prediction of the part load performance of a gas turbine depends on the quality of the engine’s component maps. Taking into consideration that compressor maps are proprietary information of the manufacturers, several methods have been developed to encounter the above limitation by scaling and adapting component maps. This part of the paper presents a new off-design performance adaptation approach with the use of a novel compressor map generation method and Genetic Algorithms (GA) optimization. A set of coefficients controlling a generic compressor performance map analytically is used in the optimization process for the adaptation of the gas turbine performance model to match available engine test data. The developed method has been tested with off-design performance simulations and applied to a GE LM2500+ aeroderivative gas turbine operating in Manx Electricity Authority’s combined cycle power plant in the Isle of Man. It has been also compared with an earlier off-design performance adaptation approach, and shown some advantages in the performance adaptation.

Part-Load Performance of Gas Turbines: Part I — A Novel Compressor Map Generation Approach Suitable for Adaptive Simulation

2012 ◽  
Author(s):  
E. Tsoutsanis ◽  
Y. G. Li ◽  
P. Pilidis ◽  
M. Newby
Keyword(s):  
Gas Turbine ◽  
Gas Turbines ◽  
Primary Objective ◽  
Operating Conditions ◽  
Small Range ◽  
Part Load ◽  
Turbine Performance ◽  
Wide Range ◽  
Map Generation ◽  
Compressor Map

Part-load performance prediction of gas turbines is strongly dependent on detailed understanding of engine component behavior and mainly that of compressors. The accuracy of gas turbine engine models relies on the compressor performance maps, which are obtained in costly rig tests and remain manufacturer’s proprietary information. The gas turbine research community has addressed this limitation by scaling default generic compressor maps in order to match the targeted off-design measurements. This approach is efficient in small range of operating conditions but becomes less accurate for wide range of operating conditions. In this part of the paper a novel method of compressor map generation which has a primary objective to improve the accuracy of engine models performance at part load conditions is presented. This is to generate a generic form of equations to represent the lines of constant speed and constant efficiency of the compressor map for a generic compressor. The parameters that control the shape of the compressor map have been expressed in their simplest form in order to aid the adaptation process. The proposed compressor map generation method has the capacity to refine current gas turbine performance adaptation techniques, and it has been integrated into Cranfield’s PYTHIA gas turbine performance simulation and diagnostics software tool.

scholarly journals Gas Turbine Performance Forecast and Assessment: GE LM2500 in Outlook

2021 ◽  
Vol 1107 (1) ◽  
pp. 012025
Author(s):  
A. El-Suleiman ◽  
O.D. Samuel ◽  
S.T. Amosun ◽  
I. Emovon ◽  
F. I. Ashiedu ◽  
...  
Keyword(s):  
Gas Turbine ◽  
Turbine Performance

Evolution of Gas Turbine Intake Air Filtration in a 420 MW Cogeneration Plant

2014 ◽  
Author(s):  
Steve Ingistov ◽  
Michael Milos ◽  
Rakesh K. Bhargava
Keyword(s):  
Gas Turbine ◽  
Gas Turbines ◽  
Economic Benefits ◽  
Cogeneration Plant ◽  
Air Filtration ◽  
Air Filter ◽  
Filter System ◽  
Turbine Performance ◽  
Filtration System ◽  
Operational Data

A suitable inlet air filter system is required for a gas turbine, depending on installation site and its environmental conditions, to minimize contaminants entering the compressor section in order to maintain gas turbine performance. This paper describes evolution of inlet air filter systems utilized at the 420 MW Watson Cogeneration Plant consisting of four GE 7EA gas turbines since commissioning of the plant in November 1987. Changes to the inlet air filtration system became necessary due to system limitations, a desire to reduce operational and maintenance costs, and enhance overall plant performance. Based on approximately 2 years of operational data with the latest filtration system combined with other operational experiences of more than 25 years, it is shown that implementation of the high efficiency particulate air filter system provides reduced number of crank washes, gas turbine performance improvement and significant economic benefits compared to the traditional synthetic media type filters. Reasons for improved gas turbine performance and associated economic benefits, observed via actual operational data, with use of the latest filter system are discussed in this paper.

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