scholarly journals Investigation Into the Adaptibility of the Modified Exhaust-Heated Gas Turbine Installation to the Operation With an Air Extraction

1991 ◽  
Author(s):  
Joseph A. Golinski
Keyword(s):  
Gas Turbine ◽  
Thermal Efficiency ◽  
Electrical Power ◽  
Chemical Processing ◽  
Turbine Plant ◽  
Coal Gasifier ◽  
Compressor Inlet ◽  
Gas Turbine Plant ◽  
Turbine Installation ◽  
Asme Paper

This paper is a continuation of investigation into the possibilities of industrial application of the modified exhaustheated gas turbine installation with increased thermal efficiency, described in the ASME-Paper 90-GT-369. According to the author’s conception this turbine installation may be very useful when interacting with some chemical processing installations, e.g. by feeding a coal gasifier with pre-heated compressed air. It would then be a turbine system with an air extraction, performing a double duty. The heat contained in the air extracted from the gas turbine system plus the mechanical/electrical power produced create permanent full load conditions yielding the maximum thermal efficiency of the system. It has been found that for some point of extraction from a gas turbine plant of 33 % efficiency (without air extraction) the overall efficiency may raise to some 60 or even 73 %. This is possible due to the fact that the enthalpy increase of the extracted air is calculated with respect to that of the compressor inlet air. Moreover the air supplied to the gasifier does not expand in the turbine and does not perform any mechanical work.

The Basic Thermodynamics of Turbine Cooling

2000 ◽  
Vol 123 (3) ◽  
pp. 583-592 ◽  
Author(s):  
J. H. Horlock
Keyword(s):  
Gas Turbine ◽  
Thermal Efficiency ◽  
Combustion Temperature ◽  
Plant Performance ◽  
Maximum Temperature ◽  
Working Fluid ◽  
Turbine Plant ◽  
Cooling Flows ◽  
Turbine Cooling ◽  
Gas Turbine Plant

Analyses of gas turbine plant performance, including the effects of turbine cooling, are presented. The thermal efficiencies are determined theoretically, assuming air standard (a/s) cycles, and the reductions in efficiency due to cooling are established; it is shown that these are small, unless large cooling flows are required. The theoretical estimates of efficiency reduction are compared with calculations, assuming that real gases form the working fluid in the gas turbine cycles. It is shown from a/s analysis that there are diminishing returns on efficiency as combustion temperature is increased; for real gases there appears to be a limit on this maximum temperature for maximum thermal efficiency.

Experimental Determination of the Heat Recovery Boiler Effectiveness of a Gas Turbine Plant

2014 ◽  
Vol 659 ◽  
pp. 503-508
Author(s):  
Sorin Gabriel Vernica ◽  
Aneta Hazi ◽  
Gheorghe Hazi
Keyword(s):  
Experimental Data ◽  
Gas Turbine ◽  
Heat Recovery ◽  
Heat Recovery Boiler ◽  
Experimental Point ◽  
Experimental Data Processing ◽  
Turbine Plant ◽  
Transfer Unit ◽  
Gas Turbine Plant ◽  
Recovery Boiler

Increasing the energy efficiency of a gas turbine plant can be achieved by exhaust gas heat recovery in a recovery boiler. Establishing some correlations between the parameters of the boiler and of the turbine is done usually based on mathematical models. In this paper it is determined from experimental point of view, the effectiveness of a heat recovery boiler, which operates together with a gas turbine power plant. Starting from the scheme for framing the measurement devices, we have developed a measurement procedure of the experimental data. For experimental data processing is applied the effectiveness - number of transfer unit method. Based on these experimental data we establish correlations between the recovery boiler effectiveness and the gas turbine plant characteristics. The method can be adapted depending on the type of flow in the recovery boiler.

scholarly journals Simulation of a Steam Injected Gas Turbine Plant Control System

1997 ◽  
Author(s):  
Shusheng Zang ◽  
Jaqiang Pan
Keyword(s):  
Gas Turbine ◽  
Flow Rate ◽  
Controller Design ◽  
Dynamic Performance ◽  
Linear Quadratic Regulator ◽  
Linear Quadratic ◽  
Turbine Plant ◽  
Fuel Flow ◽  
Lqr Controller ◽  
Gas Turbine Plant

The design of a modern Linear Quadratic Regulator (LQR) is described for a test steam injected gas turbine (STIG) unit. The LQR controller is obtained by using the fuel flow rate and the injected steam flow rate as the output parameters. To meet the goal of the shaft speed control, a classical Proportional Differential (PD) controller is compared to the LQR controller design. The control performance of the dynamic response of the STIG plant in the case of rejection of load is evaluated. The results of the computer simulation show a remarkable improvement on the dynamic performance of the STIG unit.

Effect of the Environmental Conditions of Tropical Climates on the Performance Parameters of a Gas Turbine Power Generation Plant

2020 ◽  
Author(s):  
J. Fajardo ◽  
D. Barreto ◽  
T. Castro ◽  
I. Baldiris
Keyword(s):  
Power Plant ◽  
Relative Humidity ◽  
Gas Turbine ◽  
Output Power ◽  
High Temperatures ◽  
Environmental Conditions ◽  
Thermal Efficiency ◽  
Specific Work ◽  
Atmospheric Conditions ◽  
Compressor Inlet

Abstract It is known that high temperatures adversely affect the performance of gas turbines, but the effect of the combination of atmospheric conditions (temperature and relative humidity -RH-) on the operation of this type of system is unknown. In this work the effects of atmospheric conditions on the energy and exergy indicators of a power plant with gas turbine were studied. The indicators studied were the mass flow, the specific work consumed by the compressor, specific work produced by the turbine, the combustion gas temperature, the NO concentration, the net output power, the thermal efficiency, the heat rate, the specific consumption of fuel, the destruction of exergy and exergy efficiency. Among the results, it is noted that for each degree celsius that reduces the temperature of the air at the compressor inlet at constant relative humidity on average, the mass flow of dry air increases by 0.27 kg/s, the specific work consumed by the compressors decreases by 0.45%, the output power increases by 1.17% and the thermal efficiency increases by 0.8%, the exergy destruction increases by 0.72% and the exergy efficiency increases by 0.81%. In addition, humidity changes relative to high temperatures are detected more significantly than at low temperatures. The power plant studied is installed in Cartagena, Colombia and since it is not operating in the design environmental conditions (15 °C and 60% relative humidity) it experiences a loss of output power of 6140 kW and a drop in thermal efficiency of 5.12 %. These results allow considering the implementation of air cooling technologies at the compressor inlet to compensate for the loss of power at atmospheric air conditions.

Thermodynamic Characteristics of Hybrid Solar Microgas Turbine Plants under Tropical Climate

2021 ◽  
Vol 2 (43) ◽  
pp. 20-35
Author(s):  
Andrey V. Dologlonyan ◽  
◽  
Dmitriy S. Strebkov ◽  
Valeriy T. Matveenko ◽  
◽  
...  
Keyword(s):  
Gas Turbine ◽  
Solar Collector ◽  
Heat Recovery ◽  
Tropical Climate ◽  
Simple Cycle ◽  
Turbine Engines ◽  
Gas Turbine Engines ◽  
Turbine Plant ◽  
Micro Gas Turbine ◽  
Gas Turbine Plant

The article presents the results obtained during the study of the characteristics of hybrid solar micro-gas turbine units with an integrated parabolocylindrical solar collector. The efficiency of a hybrid solar gas turbine plant depends both on the efficiency of the solar collector and the location of its integration, and on the efficiency of the gas turbine engine. (Research purpose) The research purpose is in studying hybrid solar gas turbine installations based on a parabolocylindrical focusing solar collector in combination with micro-gas turbine engines of various configurations to determine the most suitable match. (Materials and methods) The article considers four basic schemes of gas turbine engines running on organic fuel, their parameters and optimization results. The article presents the main climatic parameters for the study of the focusing solar collector, as well as the parameters of the collector itself and the main dependencies that determine its efficiency and losses. The place of integration of the focusing solar collector into the gas turbine plant was described and justified. (Results and discussion) Hybrid solar micro-gas turbine installations based on micro-gas turbine engines of a simple cycle, a simple cycle with heat recovery, a simple cycle with a turbocharger utilizer, a simple cycle with a turbocharger utilizer and heat recovery for tropical climate conditions were studied on the example of Abu Dhabi. (Conclusions) The most suitable configuration of micro-gas turbine engines for integrating a focusing solar collector is a combination of a simple cycle with a turbocharger utilizer and regeneration. The combination of micro-gas turbine engines of a simple cycle with a turbocharger heat recovery and heat recovery with an integrated focusing solar collector can relatively increase the average annual efficiency of fuel consumption of such installations in a tropical climate by 10-35 percent or more, while maintaining cogeneration capabilities.

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