Investigation of nonlinear numerical mathematical model of a multiple shaft gas turbine unit

2003 ◽  
Vol 17 (12) ◽  
pp. 2087-2098
Author(s):  
SooYong Kim* ◽  
Valeri P. Kovalevsky
Keyword(s):  
Mathematical Model ◽  
Gas Turbine ◽  
Turbine Unit ◽  
Gas Turbine Unit

scholarly journals Software-modeling complex for automation tests of low and medium power turbo electric tests

2019 ◽  
Vol 140 ◽  
pp. 05012
Author(s):  
Boris Kavalerov ◽  
Grigory Kilin ◽  
Evgeniy Zhdanovskiy
Keyword(s):  
Mathematical Model ◽  
Control System ◽  
Power Plant ◽  
Gas Turbine ◽  
Power Plants ◽  
Turbine Unit ◽  
Electric Power Industry ◽  
Software Modeling ◽  
Gas Turbine Unit ◽  
Gas Turbine Power Plant

There are many problems connected with use of gas turbine units for electricity generation. The main problem is the gas turbine unit inefficient operation as a synchronous generator drive. To ensure the required quality of the generated electricity, which is largely determined by the nature of the transient processes of gas turbine unit, further improvement of control algorithms for automated control systems of gas turbine unit is required. In solving this problem, gas turbine unit should be considered in conjunction with other subsystems and units, for gas turbine power plants - this is, first of all, the electric generator and electric power industry in general. The process of tuning a gas turbine power plant control system is part of the test. Particularly time-consuming operations are manual tuning of the control system during experimental design and operational tests. Therefore, we propose to use a software-modeling complex, on the basis of which it is possible to obtain a neural network mathematical model of a gas turbine electro station and conduct its tests. In this case, in the process of testing the control system, the setup procedure is first performed on a mathematical model, then the settings obtained are checked using semi-bench testing, the final check of the decisions taken is carried out on a full-scale test bench, and data on the direct operation of a gas turbine power plant are also taken into account.

Synthesis and Analysis of a Combined Magnetic and Gas Dynamic Suspension for a Model Range of New-Generation High-Speed Micro Gas Turbine Power Units

2021 ◽  
pp. 5-17
Author(s):  
Sergey A. GANDZHA ◽  
◽  
Nikolay I. NEUSTROEV ◽  
Pavel A. TARANENKO ◽  
◽  
...  
Keyword(s):  
Gas Turbine ◽  
High Speed ◽  
Turbine Unit ◽  
Electrical Machine ◽  
Gas Turbine Unit ◽  
Micro Gas Turbine ◽  
Gas Dynamic ◽  
Study Results ◽  
Generator Design ◽  
New Generation

The modern power industry is characterized by intense development of distributed generation, with which numerous sources of different capacities are connected into a single network. This makes it possible to improve the reliability of the entire system, since the probability of several sources to fail simultaneously is quite low. Electric generation based on high-speed gas turbine units accounts for a significant share in the overall balance, due to which scientific research and new engineering solutions in this area are important and relevant. An innovative design of a high-speed gas turbine unit based on a switched axial generator is proposed. This electrical machine has a diamagnetic armature, which eliminates magnetic losses, due to which better efficiency of the power unit is achieved and its design is simplified. The high speed of rotation and the presence of critical resonant rotor speeds generated the need to adopt appropriate engineering decisions in regard of its supports. A combined suspension involving the use of magnetic and gas-dynamic bearings is proposed. The magnetic bearings support the gas turbine unit operation at low speeds during its acceleration, and the gas-dynamic bearings support its operation at high nominal speed. The generator design and the combined suspension layout are shown. The numerical analyses of magnetic and gas-dynamic bearings for a gas turbine unit for a capacity of 100 kW and rotation speed of 70 000 rpm are given. The study results can be used for a series of gas turbine units with capacities ranging from 10 to 500 kW. In our opinion, this concept is competitive with modern analogs with a radial generator design.

scholarly journals Comparison of Test Measurements Taken on a Pipeline Compressor / Gas Turbine Unit in the Workshop and at Site

1995 ◽  
Author(s):  
W. Schmitt ◽  
V. Thomas
Keyword(s):  
Reynolds Number ◽  
Gas Turbine ◽  
Turbine Unit ◽  
Test Results ◽  
Gas Turbine Unit ◽  
Test Installation ◽  
Measuring Methods ◽  
Test Execution ◽  
The Third ◽  
Load Conditions

The first part of this paper describes the test installation of the gas turbine and the compressor in the workshop, test execution, measuring methods, evaluation and measuring uncertainties. The second part of this paper describes the site installation, execution of the test under full load conditions on natural gas, measuring methods, evaluation and measuring uncertainties. The third part of this paper compares both the measurements and the Reynolds number correction which was used for the evaluation of the pipeline compressor test results in the workshop.

scholarly journals ВИКОРИСТАННЯ РЕЗЕРВУ ХОЛОДОПРОДУКТИВНОСТІ АБСОРБЦІЙНОЇ ХОЛОДИЛЬНОЇ МАШИНИ ПРИ ОХОЛОДЖЕННІ ПОВІТРЯ НА ВХОДІ ГТУ

2018 ◽  
pp. 39-44
Author(s):  
Богдан Сергійович Портной ◽  
Андрій Миколайович Радченко ◽  
Роман Миколайович Радченко ◽  
Сергій Анатолійович Кантор
Keyword(s):  
Gas Turbine ◽  
Turbine Unit ◽  
Cooling System ◽  
Lithium Bromide ◽  
Air Cooling ◽  
Gas Turbine Unit ◽  
Air Cooler ◽  
Refrigeration Capacity ◽  
Heat Loads ◽  
Current Heat

The processes of air cooling at the gas turbine unit inlet by absorption lithium-bromide chiller have been analyzed. The computer programs of firms-producers of heat exchangers were used for the gas turbine unit inlet air cooling processes simulation. The absorption lithium-bromide chiller refrigeration capacity reserve (the design heat load excess over the current heat loads) generated at the reduced current heat loads on the air coolers at the gas turbine unit inlet in accordance with the lowered ambient air parameters has been considered. The absorption lithium-bromide chiller refrigeration capacity reserve is expedient to use at increased heat load on the air cooler. To solve this problem the refrigeration capacity required for cooling air at the gas turbine unit inlet has been compared with the excessive absorption lithium-bromide chiller refrigeration capacity exceeding current heat loads during July 2017.The scheme of gas turbine unit inlet air cooling system with using the absorption lithium-bromide chiller refrigeration capacity reserve has been proposed. The proposed air cooling system provides gas turbine unit inlet air precooling in the air cooler booster stage by using the absorption lithium-bromide chiller excessive refrigeration capacity. The absorption chiller excessive refrigeration capacity generated during decreased heat loads on the gas turbine unit inlet air cooler is accumulated in the thermal storage. The results of simulation show the expediency of the gas turbine unit inlet air cooling by using the absorption lithium-bromide chiller refrigeration capacity reserve, which is generated at reduced thermal loads, for the air precooling in the air cooler booster stage. This solution provides the absorption lithium-bromide chiller installed (designed) refrigeration capacity and cost reduction by almost 30%. The solution to increase the efficiency of gas turbine unit inlet air cooling through using the absorption chiller excessive refrigeration potential accumulated in the thermal storage has been proposed.

Thermodynamic Rationale for Using Expander-Compressor Gas Turbine Power Unit

2021 ◽  
pp. 166-184
Author(s):  
A.S. Strebkov ◽  
A.V. Osipov ◽  
S.V. Zhavrotskiy
Keyword(s):  
Natural Gas ◽  
Gas Turbine ◽  
Power Unit ◽  
Thermal Cycle ◽  
Turbine Unit ◽  
Negative Impact ◽  
Excess Pressure ◽  
Electricity Production ◽  
Gas Turbine Unit ◽  
Energy Potential

Natural gas is transported through a network of main gas pipelines under high pressure, and the process of its consumption requires a decrease in pressure of gas laid mainly in throttling devices. It is beneficial to use part of the available energy potential of natural gas for electricity production by means of expander-generator technologies. However, the task of finding ways to increase the capacity and efficiency of gas turbine power units using the energy of excess pressure of natural gas does not lose its relevance. The study poses and solves the problem of developing a new thermal cycle diagram of a combined power unit to substitute throttling pressure regulators at gas distribution stations with an expander-compressor gas turbine unit. A distinctive feature of the unit is the replacement of the gas turbine drive of the air compressor with its drive from the turbo-expander by using the energy of excess pressure of natural gas. This results in significant increase in the absolute thermal efficiency and decrease in the specific fuel and energy costs. We developed analytical dependencies relating the operating parameters of the expander-compressor gas turbine unit and its output characteristics. Thus, it was possible to find an approach to calculating the unit, the approach being based on proven methods for thermal cycle calculation. The results of the performed calculations show that, in comparison with gas turbine units, the expander-compressor gas turbine unit has a significantly lower specific consumption of equivalent fuel and a lower negative impact on the environment

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