scholarly journals Computer Techniques for Evaluating Gas Turbine Heat Recovery Applications

1972 ◽  
Author(s):  
J. C. Stewart
Keyword(s):  
Gas Turbine ◽  
Heat Recovery ◽  
Full Range ◽  
Operating Conditions ◽  
Heat Recovery Boiler ◽  
Feed Water ◽  
Steam Temperature ◽  
Pinch Point ◽  
Superheated Steam Temperature ◽  
Boiler Design

The design of gas turbine heat recovery boiler systems is based on several engineering and economic parameters that require lengthy iterative calculations. Computer programs have been developed which reduce the time factor and provide the optimum design for a given set of exhaust conditions and steam requirements. This paper describes programs which provide an installed cost estimate that can be used to evaluate the affect of variations in boiler pinch point, back pressure, stack temperature, superheated steam temperature, feed water approach temperature, and supplementary firing for any gas turbine heat recovery application. Another program provides operating performance of the selected boiler design through a range of exhaust conditions due to ambient or load changes, and also for changes in the steam capacity or pressure requirements. Data from this program is used to plot performance “maps” for the full range of “off-design” operating conditions.

scholarly journals The Design and Application of the Gas Turbine Heat Recovery Boiler

1967 ◽  
Author(s):  
J. C. Stewart ◽  
H. J. Stretch
Keyword(s):  
Gas Turbine ◽  
Heat Balance ◽  
Heat Recovery ◽  
Heat Recovery Boiler ◽  
Optimum Heat ◽  
Recovery Boiler ◽  
Gas Turbine Exhaust ◽  
And Performance ◽  
Boiler Design ◽  
Operating Points

This paper presents details of a heat-recovery boiler design as applied to gas turbine exhaust for the generation of steam. The factors involved in such applications are reviewed, together with an explanation of the heat-balance calculations and the limits that apply. A description is given of the parameters used in the design of the heat-transfer surface in the boiler. A specific design is described including details of the components in the boiler train. Reference is made to factors to be considered in erection and installation of this equipment. An explanation is included of the computer programs used to determine the optimum heat balance and for boiler selection and performance at “off-design” operating points. The operating performance of an actual installation is included.

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.

New Concept of a Micro Gas Turbine Based Co-Generation Package for Performance Improvement in Practical Use

2005 ◽  
Author(s):  
Kenichiro Mochizuki ◽  
Satoshi Shibata ◽  
Umeo Inoue ◽  
Toshiaki Tsuchiya ◽  
Hiroko Sotouchi ◽  
...  
Keyword(s):  
Gas Turbine ◽  
Steam Generator ◽  
Thermal Efficiency ◽  
Heat Recovery ◽  
Steam Injection ◽  
Operating Conditions ◽  
Market Potential ◽  
Injection System ◽  
Heat Recovery Steam Generator ◽  
Micro Gas Turbine

As the energy consumption has been increasing rapidly in the commercial sector in Japan, the market potential for the micro gas turbine is significant and it will be realized substantially if the thermal efficiency is improved. One of measures is to introduce the steam injection system using the steam generated by the heat recovery steam generator. Steam injection tests have been carried out using a micro gas turbine (Capstone C60). Test results showed that key performance parameters such as power output, thermal efficiency and emissions were improved by the steam injection. The stable operation of micro gas turbine with steam injection was confirmed under various operating conditions. Consequently, a micro gas turbine based co-generation package with steam injection driven by a heat recovery steam generator (HRSG) with supplementary firing is proposed.

scholarly journals Embedded Fuzzy Based Boiler Control

2016 ◽  
Vol 5 (2) ◽  
pp. 105
Author(s):  
Celin S
Keyword(s):  
Fuzzy Logic ◽  
Embedded System ◽  
Power Plants ◽  
Operating Conditions ◽  
Project Work ◽  
Feed Water ◽  
Steam Temperature ◽  
Fuzzy Logic Controllers ◽  
Power Station ◽  
Fuzzy Logic Technique

<p>Boiler control in a power station is a very important criteria in regulation of uninterrupted electricity. In existing power plants, the control of its features and parameters are done by PI and PD controllers. The parameters that control the regulation of boiler conduction are drum level, steam flow, feed water flow, steam temperature and light intensity. It is necessary to produce the steam required to run the generator. When the load in the generator changes, there must be corresponding change in the steam volume. This may cause adverse effect in the boiler. In order to avoid the effect in the boiler, the parameters mentioned above must be maintained constant, which is attained by regulating the corresponding valves. This project work has a feasibility of using fuzzy logic controllers in the place of conventional controllers is done by using embedded system. It is found that the rule based fuzzy logic technique can be implemented by stringent operating conditions. </p>

scholarly journals An Introduction Into the Clearance Management of Ansaldo GT36 From Development to Validation

2018 ◽  
Author(s):  
S. Boeller ◽  
B. Feuillard ◽  
G. Filkorn ◽  
S. Olmes ◽  
F. Prou ◽  
...  
Keyword(s):  
Gas Turbine ◽  
High Efficiency ◽  
Evaluation Process ◽  
3D Models ◽  
Operating Conditions ◽  
Active Management ◽  
Test Plant ◽  
Pinch Point ◽  
Load Range ◽  
Clearance Prediction

The optimization and evaluation of blading clearance is important for gas turbine efficiency and performance. The Ansaldo GT36 gas turbine offers high efficiency together with outstanding flexibility across a large load range. Active management of engine clearances during the complete development process followed by a thorough validation on the Ansaldo test plant facility in Birr, Switzerland enables the GT to attain ambitious clearance targets. The clearance at baseload must be minimized but is limited by the pinch point clearance during cold, warm and hot start-ups — including normal and fast ramp-up and/or shutdown. Therefore transient analysis is necessary for covering the different operating conditions. A well-established process of 2d finite element modelling of the whole engine model (WEM) comprised of axis-symmetric and plane stress elements was used during the design process from concept to detailed design to optimize the clearances. It delivers the transient stator and rotor deformation and together with the compressor and turbine airfoil deformation based on 3D models the basic clearance evaluation process is defined. The GT engine design was significantly influenced, starting with a simplified version of the WEM for identification of the most promising variants. Subsequently a detailed WEM was developed which is fully validated against measurements on the test engine. Different 3D effects are considered separately at identified critical transient conditions and overlaid on the 2d clearances which lead to the final optimized clearances. In addition to this, limitations from each step of the manufacturing process were identified and improved to reduce tolerances and uncertainties to their minimum. The results of the calculation and clearance prediction process are compared against clearance measurements during all kinds of GT operation and cooldown. Passive clearance indicators showing the remaining gap till rubbing would occur and rub marks, in areas that tolerate it, further validate the clearances and clearance prediction process.

Online Adaptive Control Tuning in a Gas Turbine Hybrid System

2020 ◽  
Author(s):  
Harry Bonilla-Alvarado ◽  
Bernardo Restrepo ◽  
Paolo Pezzini ◽  
Lawrence Shadle ◽  
David Tucker ◽  
...  
Keyword(s):  
Power Plant ◽  
Gas Turbine ◽  
Mass Flow ◽  
Pid Controller ◽  
Standard Procedure ◽  
Full Range ◽  
Test Procedure ◽  
Operating Conditions ◽  
Control Technique ◽  
Pid Controllers

Abstract Proportional integral and derivative (PID) controllers are the most popular technique used in the power plant industry for process automation. However, the performance of these controllers may be affected due to variations in the power plant operating conditions, such as between startup, shutdown, and baseload/part-load operation. To maintain the desired performance over the full range of operations, PID controllers are always retuned in most power plants. During this retuning process, the operator takes control of the manipulated variable to perform a standard procedure based on a bump test. This procedure is generally performed to characterize the relationship between the manipulated variable and the process variable at each operating condition. After the bump test, the operator generally applies basic guidelines to assign new parameters to the PID controller. In this paper, the Model Reference Adaptive Controller (MRAC) control technique was implemented to update the PID controller parameters online without performing the bump test procedure. This approach allows updating the controller response on-the-fly while the power plant is running and without using the standard procedure based on a bump test. The MRAC was developed and demonstrated in the gas turbine hybrid cycle at the National Energy Technology Laboratory (NETL) to retune a critically damped mass flow PID controller into an over-damped response. Results showed stable performance during mass flow setpoint steps and also a stable update of the controller parameters.

scholarly journals The Effect of Thermal Matching on the Thermodynamic Performance of Gas Turbine and IC Engine Cogeneration Systems

1985 ◽  
Author(s):  
J. W. Baughn ◽  
N. Bagheri
Keyword(s):  
Gas Turbine ◽  
Combustion Engine ◽  
Full Range ◽  
Operating Conditions ◽  
Hot Water ◽  
Ic Engine ◽  
Thermal Output ◽  
Savings Rate ◽  
Thermodynamic Performance ◽  
Cogeneration System

Computer models have been used to analyze the thermodynamic performance of a gas turbine (GT) cogeneration system and an internal combustion engine (IC) cogeneration system. The purpose of this study was to determine the effect of thermal matching of the load (i.e., required thermal energy) and the output steam fraction (fraction of the thermal output, steam and hot water, which is steam) on the thermodynamic performance of typical cogeneration systems at both full and partial output. The thermodynamic parameters considered were; the net heat rate (NHR), the power to heat ratio (PHR), and the fuel savings rate (FSR). With direct use (the steam fractions being different); the NHR of these two systems is similar at full output, the NHR of the IC systems is lower at partial output, and the PHR and the FSR of the GT systems is lower than the IC systems over the full range of operating conditions. With thermal matching (to produce a given steam fraction) the most favorable NHR, PHR, and FSR depends on the method of matching the load to the thermal output.

scholarly journals Total Energy Applications for Ships Service Power

1973 ◽  
Author(s):  
G. T. Greene ◽  
C. E. Warner
Keyword(s):  
Total Energy ◽  
Gas Turbine ◽  
Gas Turbines ◽  
Heat Recovery ◽  
High Speed ◽  
Thermal Power ◽  
Electrical Power ◽  
Energy System ◽  
Heat Recovery Boiler ◽  
Energy Applications

With the advent of high-speed, gas-turbine-powered naval vessels, new lighter weight concepts are required for service power. This paper demonstrates how a gas-turbine-driven ship service generator set can be used to supply multiple functions, including electrical power, thermal power, pneumatic power, and direct shaft-driven equipment. The thermal power can be used to perform heating, distillation plant operation, galley services, and air conditioning functions. The Canadian DDH 280 Class destroyer system is presented as an example of a total energy system. Heat recovery boiler and gas turbine characteristics are presented for 600-hp and 5000-hp marine gas turbines. A gas turbine total energy system is compared to a conventional diesel system without heat recovery.

Adapting the Micro-Gas Turbine Operation to Variable Thermal and Electrical Requirements

2003 ◽  
Author(s):  
Fabio Bozza ◽  
Maria Cristina Cameretti ◽  
Raffaele Tuccillo
Keyword(s):  
Gas Turbine ◽  
Thermal Cycle ◽  
Heat Recovery ◽  
Mechanical Load ◽  
Heat Recovery Boiler ◽  
Variable Speed ◽  
Micro Gas Turbine ◽  
Thermal Output ◽  
Wide Range ◽  
Component Matching

This paper examines the possibilities for a micro-gas turbine operation under a wide range of thermal and mechanical load requirements. The authors focus the attention on a partially recuperated thermal cycle based on a by-pass option towards the heat recovery boiler, in order to adapt the gas turbine operation to increasing needs of thermal output. In addition, a variable speed operation is considered as a more reliable method for decreasing the mechanical output without producing an excess in efficiency decay. The actual possibilities of the above named regulation tools are examined by an integrated procedure which involves, besides an accurate thermodynamic preliminary analysis, the component matching study and the CFD based simulation of the combustion chamber.

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