Wyniki wyszukiwania - BazTech

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Improvement of Energy Efficiency, Reliability and Environmental Safety of Power Plants Based on Associated Petroleum Gas

Shonin O. B., Salov R. A.

Journal of Ecological Engineering

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2017

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Vol. 18, nr 3

91--96

EN

The paper deals with one of important ecological problems – utilization of associated petroleum gas (APG) at oil fields. An example of APG usage as a fuel for gas turbine power plants is examined. Among possible topologies of power plants the focus is put on the structure based on turbines with combined diesel-gas supplying for increasing reliability of power generation in case of failures in the system of preparation of APG. In order to ensure correct transition of turbines from gas to diesel supplying it is important to know responds of the system to the interruption of gas supplying. Based on the fundamental principles of thermodynamics and fluid dynamics gas-turbine power plant simulation model has been developed utilizing MATLAB/Simulink environment. Using the model allowed revealing the influence of load-sharing among the turbines of different types on the transition to an additional source of turbine fuel. Based on simulation results, recommendations have been worked out for the improvement of the reliability of gas turbine power plant.

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Thermodynamic modeling and second law based performance analysis of a gas turbine power plant (exergy and exergoeconomic analysis)

Ameri M., Enadi N.

Journal of Power Technologies

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2012

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Vol. 92, nr 3

183--191

EN

It this research paper, a complete thermodynamic modeling of one of the gas turbine power plants in Iran is performed based on thermodynamic relations. Moreover, a complete computer code is developed for the simulation purposes using the Matlab software. To assess the system performance, exergy and exergo-economic analysis are conducted to determine the exergy destruction of each component and cost of each flow line of the system. A complete parametric study is also carried out to study the effect of some design parameters such as exergy efficiency and total cost of exergy destruction on the system performance variation. The exergy analysis results have revealed that combustion chamber (CC) is the most exergy destructor component compared to other cycle components. Also, its exergy efficiency is less than other components which is due to the high temperature difference between working fluid and burner temperature. In addition, it was found that by an increase in the TIT (gas turbine inlet temperature), the exergy destruction of this component can be reduced. On the other hand, the cost of exergy destruction, which is a direct function of exergy destruction, is high for combustion chamber. The effects of design parameters on exergy efficiency have shown that an increase in the air compressor pressure ratio and TIT increases the total exergy efficiency of the cycle. Furthermore, the results have revealed that by an increase in the TIT for about 350 K the cost of exergy destruction can be decreased for about 22%. Therefore, TIT is the best option to improve the cycle losses.

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Sterowanie automatyczne częstotliwości systemu elektroenergetycznego zasilanego elektrownią wiatrową wspomaganą elektrownią konwencjonalną

Domachowski Z., Ghaemi M.

Systems : journal of transdisciplinary systems science

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2008

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Vol. 13, spec. iss. 1/2

158--164

EN

Windpower is considerably increasing in many countries worldwide. Unfortunately, windfarm produces unreliable output due to the vagaries of the wind profile and so can not meet demand. Without action these would be major problems with fluctuating power quality. Wind energy source needs local support from conventional sources. The requirements concerning the reliability and quality of electric energy supply can be most satisfactory fulfilled when a windfarm is connected to a large electric power system. A strict cooperation is required between the large power system control and the windfarm control system to provide among others that any fluctuations of windpower supply should be damped as near to the windfarm as possible to avoid considerable disturbances of frequency and voltage in the electric power system. The distance between a windfarm and a large electric power system is very often too long to build a transmission line on an economically sound basis. It becomes unavoidable to produce windpower in a separate electric power system. Any fluctuations of windpower have to be damped due to an appropriate action of a conventional power plant support. To provide such a support the following aid concepts are possible: gas turbine power plant, diesel engine power plant, pumped storage power station. Investigation on the control of a separate electric power system composed of windpower farm and gas turbine power plant have been carried out. Effects of turbulence in the wind different amplitude and frequency of wind speed variations on gas turbine power plant control system have been simulated. The gas turbine power plant control system structure and parameters have been adopted to provide limiting the power and frequency fluctuations resulting from wind turbulence.