INCREASING THE EFFICIENCY OF MONAR GAS-STEAM PLANTS BASED ON THE USE OF DUAL-FUEL CIRCUITS

2017 ◽  
Author(s):  
Gennadii Liubchik ◽  
◽  
Nataliia Fialko ◽  
Aboubakr Regragui ◽  
Raisa Navrodskaia ◽  
...  
Keyword(s):  
Natural Gas ◽  
Gas Turbine ◽  
Calorific Value ◽  
Liquid Fuels ◽  
Electricity Production ◽  
Dual Fuel ◽  
Low Grade ◽  
Steam Generation ◽  
Turbine Plant ◽  
Gas Turbine Plant

The paper proposes new circuit solutions for dual-fuel monar gas-steam plants (DMGSP), which provide an increase in the efficiency of electricity production in these plants by replacing the use of natural gas and increasing the share of generating "energy" steam by including an additional source of generation in the technological scheme steam - "preboiler", in which steam generation occurs as a result of the use of chemical energy of low-grade solid or liquid fuels - substitutes for natural gas of low or medium calorific value. DMGSPs are considered in two variants of operation of their utilization circuit: under conditions of heating and evaporation of feeding water, or only heating of this water. The results of calculations of the effectiveness of the implementation of these schemes on the basis of a monar gas turbine plant in comparison with the basic installation "VODOLEY" and a gas turbine plant of a simple scheme are presented.

scholarly journals Technical-economic evaluation of medium-power gas turbine plant with air bottoming cycle

2019 ◽  
Vol 114 ◽  
pp. 07005 ◽  
Author(s):  
Alexey V. Mikheev ◽  
Yulia M. Potanina
Keyword(s):  
Power Plant ◽  
Gas Turbine ◽  
Optimization Problems ◽  
Electric Energy ◽  
Electricity Production ◽  
Turbine Plant ◽  
Technical And Economic Analysis ◽  
Gas Turbine Plant ◽  
Gas Turbine Power Plant ◽  
Minimum Costs

A developed mathematical model of a gas turbine power plant with an additional air bottoming cycle to utilize heat of exhaust gases was used to carry out a technical and economic analysis. The approach used in the study is aimed at solving two types of optimization problems: (1) to determine the maximum net efficiency of the power plant and (2) to adjust the equipment and operating parameters for achieving minimum costs of electricity production. The study shows that the air bottoming cycle provides an increase in the net efficiency up to 44 - 48% and adds about 20% to the installed power capacity. The minimum costs of electric energy production estimated for different prices of fuel (natural gas) are competitive enough, so the gas turbine power plant with air bottoming cycle seems to be a promising technology for medium-power generation.

Study of operating conditions and consumption fuel for a gas turbine plant.

2020 ◽  
Vol 23 (2) ◽  
pp. 65-69
Author(s):  
E. LYUBIMENKO ◽  
◽  
A.A SHTEPA ◽  
Keyword(s):  
Natural Gas ◽  
Gas Turbine ◽  
Turbine Unit ◽  
Constant Pressure ◽  
Operating Mode ◽  
Gas Turbine Unit ◽  
Optimal Operating ◽  
Turbine Plant ◽  
Gas Consumption ◽  
Gas Turbine Plant

Carrying out research work to determine the working conditions and determine the fuel consumption in a gas turbine installation. The descriptions of a gas turbine unit operating on gaseous fuel are presented: in normal and standby operating modes. The optimal operating mode of the gas turbine plant is combined: the production of heat and electricity. A study of the operating mode of a gas turbine unit at a constant pressure of 0.1 MPa and a temperature when air enters the compressor of a gas turbine unit with fuel combustion has been carried out. The features of the use of an energy carrier in a gas turbine unit during the year are highlighted and analyzed. The structure and current consumption of natural gas in a gas turbine unit for accounting for the consumption of energy carriers is described. As a result of the study, a substantiation of the concept of calculating the predictive function for accounting for the costs of non-renewable energy resources for a gas turbine plant, used natural gas, is proposed. This, in turn, ensures effective planning and increasing the economic efficiency of the enterprise. All this makes it possible to regulate the modes and costs of using fuel during the operation of a gas turbine unit. A study of the operating mode of the gas turbine unit at a constant pressure of 0.1 MPa and a temperature of 10 ° C was carried out, when the optimal operating mode of the gas turbine unit is the combined production of thermal and electrical energy. The choice of the predicting function by which it is better to forecast the use of the energy carrier for the current year has been proposed and substantiated. The scientific novelty of the research lies in the formulation of the substantiation of the conceptual principles for the construction of a mathematical model of the use and accounting of energy consumption based on the use of predictive functions and recommendations are provided on how to rationally use natural resources. The practical significance of the work lies in forecasting and calculating the volume of natural gas consumption (thousand m3) by the enterprise for the next year, and this, in turn, allows us to adjust the gas consumption for the future and make informed decisions on how it is possible to reduce fuel consumption or use it as efficiently as possible.

scholarly journals Adding hydrogen to fuel gas to improve energy performance of gas-turbine plants

2021 ◽  
Vol 25 (3) ◽  
pp. 342-355
Author(s):  
G. E. Marin ◽  
B. M. Osipov ◽  
A. R. Akhmetshin ◽  
M. V. Savina
Keyword(s):  
Natural Gas ◽  
Gas Turbine ◽  
Fuel Consumption ◽  
Peak Power ◽  
Energy Performance ◽  
System Capacity ◽  
Variable Load ◽  
Fuel Gas ◽  
Turbine Plant ◽  
Gas Turbine Plant

The study aims to calculate the technical and economic efficiency of adding hydrogen to natural gas to improve the energy characteristic of the fuel in gas-turbine plants during long-term gas field operations. Mathematical modelling techniques in the CAS CFDPT (computer-aided system for computational fluid dynamics of power turbomachinery) program were used to develop a mathematical model of the General Electric 6FA gas turbine engine. It was shown that a decrease in the calorific value of the fuel leads to an increase in fuel consumption by 11% and the amount of CO2, NO2 in the turbine exhaust gas. It was determined that, during the freezing season and peak power rating operations, the turbine power is limited by the fuel system capacity (its maximum value amounted to 5.04 kg/s). It was shown that energy characteristics can be improved by adding hydrogen to the feed natural gas. Energy efficiency was calculated at different fuel components (hydrogen and natural gas) ratios at variable-load operation in the range between 75 and 85 MW. Instant fuel gas flow amounted to 5.04 kg/s (with 4.5% hydrogen and 95.5% natural gas in the feed fuel) at 85 MW. Due to its high cost, the use of hydrogen is only advisable in peak power rating operations to reach the maximum capacity of the gas-turbine plant. The proposed method of adding 4.5% hydrogen to fuel gas allows the maximum fuel consumption to be maintained at a rate of 5.04 kg/s to reach the topping power of 85 MW. When using this method, there are no limitations on the maximum and peak capacity of the gas-turbine plant.

scholarly journals Impact of inlet fogging and fuels on power and efficiency of gas turbine plants

2013 ◽  
Vol 17 (4) ◽  
pp. 1107-1117
Author(s):  
Mehaboob Basha ◽  
S.M. Shaahid ◽  
Luai Al-Hadhrami
Keyword(s):  
Saudi Arabia ◽  
Natural Gas ◽  
Gas Turbine ◽  
Air Temperature ◽  
Power Plants ◽  
Computational Study ◽  
Electricity Price ◽  
Fuel Price ◽  
Turbine Plant ◽  
Gas Turbine Plant

A computational study to assess the performance of different gas turbine power plant configurations is presented in this paper. The work includes the effect of humidity, ambient inlet air temperature and types of fuels on gas turbine plant configurations with and without fogger unit. Investigation also covers economic analysis and effect of fuels on emissions. GT frames of various sizes/ratings are being used in gas turbine power plants in Saudi Arabia. 20 MWe GE 5271RA, 40 MWe GE-6561B and 70 MWe GE-6101FA frames are selected for the present study. Fogger units with maximum mass flow rate of 2 kg/s are considered for the present analysis. Reverse Osmosis unit of capacity 4 kg/s supplies required water to the fogger units. GT PRO software has been used for carrying out the analysis including; net plant output and net efficiency, break even electricity price and break even fuel LHV price etc., for a given location of Saudi Arabia. The relative humidity and temperature have been varied from 30 to 45 % and from 80 to 100? F, respectively. Fuels considered in the study are natural gas, diesel and heavy bunker oil. Simulated gas turbine plant output from GT PRO has been validated against an existing gas turbine plant output. It has been observed that the simulated plant output is less than the existing gas turbine plant output by 5%. Results show that variation of humidity does not affect the gas turbine performance appreciably for all types of fuels. For a decrease of inlet air temperature by 10 ?F, net plant output and efficiency have been found to increase by 5 and 2 %, respectively for all fuels, for GT only situation. However, for GT with Fogger scenario, for a decrease of inlet air temperature by 10 ?F, net plant output and efficiency have been found to further increase by 3.2 and 1.2 %, respectively for all fuels. For all GT frames with fogger, the net plant output and efficiency are relatively higher as compared to GT only case for all fuels. More specifically, net plant output and efficiency for natural gas are higher as compare to other fuels for all GT scenarios. For a given 70 MWe frame with and without fogger, break even fuel price and electricity price have been found to vary from 2.2 to 2.5 USD/MMBTU and from 0.020 to 0.0239 USD/kWh respectively. It has been noticed that turbines operating on natural gas emit less carbon relatively as compared to other fuels.

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.

Development and Integration of the Dual Fuel Combustion System for the MGT Gas Turbine Family

2021 ◽  
Author(s):  
Bernhard Ćosić ◽  
Frank Reiss ◽  
Marc Blümer ◽  
Christian Frekers ◽  
Franklin Genin ◽  
...  
Keyword(s):  
Gas Turbine ◽  
Distribution System ◽  
Gas Turbines ◽  
Liquid Fuel ◽  
Fuel Injection ◽  
Liquid Fuels ◽  
Dual Fuel ◽  
Gaseous Fuels ◽  
Supply And Distribution ◽  
Industrial Gas Turbines

Abstract Industrial gas turbines like the MGT6000 are often operated as power supply or as mechanical drives. In these applications, liquid fuels like 'Diesel Fuel No.2' can be used either as main fuel or as backup fuel if natural gas is not reliably available. The MAN Gas Turbines (MGT) operate with the Advanced Can Combustion (ACC) system, which is capable of ultra-low NOx emissions for gaseous fuels. This system has been further developed to provide dry dual fuel capability. In the present paper, we describe the design and detailed experimental validation process of the liquid fuel injection, and its integration into the gas turbine package. A central lance with an integrated two-stage nozzle is employed as a liquid pilot stage, enabling ignition and start-up of the engine on liquid fuel only. The pilot stage is continuously operated, whereas the bulk of the liquid fuel is injected through the premixed combustor stage. The premixed stage comprises a set of four decentralized nozzles based on fluidic oscillator atomizers, wherein atomization of the liquid fuel is achieved through self-induced oscillations. We present results illustrating the spray, hydrodynamic, and emission performance of the injectors. Extensive testing of the burner at atmospheric and full load high-pressure conditions has been performed, before verification within full engine tests. We show the design of the fuel supply and distribution system. Finally, we discuss the integration of the dual fuel system into the standard gas turbine package of the MGT6000.

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.

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