Cascade Utilization of Fuel Gas Energy in Gas-to-Liquids Plant

2014 ◽  
Vol 136 (7) ◽  
Author(s):  
Shimin Deng ◽  
Rory Hynes
Keyword(s):  
Gas Turbine ◽  
Waste Heat ◽  
Combined Cycle ◽  
Fuel Gas ◽  
Syngas Production ◽  
New Process ◽  
Conventional Technology ◽  
Combined Cycle Plant ◽  
Gas To Liquids ◽  
Lower Temperature

This paper investigates on a gas-to-liquids (GTL) plant with ATR syngas production and proposes a new process to use a gas turbine and waste heat recovery gas/steam streams preheater to replace the fired heater. The new process features cascade utilization of fuel gas energy, as fuel gas is firstly used in a gas turbine (GT) at very high temperature and then lower-temperature GT exhaust gas is further used for preheating. Large exergy loss of heat transfer in the fired heater is eliminated. The improved process has an equivalent power generation efficiency of 80% which is significantly higher than conventional technology. Economic analysis indicates 129.8 M$ revenue would be produced over the lifetime if the extra power from a 15,000 bbl/d GTL plant can be exported to the grid at the price of cost of electricity for a conventional natural gas fired combined cycle plant.

Dynamic Modeling of a Combined-Cycle Plant

1989 ◽  
Author(s):  
K. S. Ahluwalia ◽  
R. Domenichini
Keyword(s):  
Gas Turbine ◽  
Dynamic Modeling ◽  
Waste Heat ◽  
Control Strategies ◽  
Transient Behavior ◽  
Combined Cycle ◽  
Design Tool ◽  
Waste Heat Boiler ◽  
Combined Cycle Plant ◽  
Operating Constraints

Greater use is being made of dynamic simulation of energy systems as a design tool for selecting control strategies and establishing operating procedures. This paper discusses the dynamic modeling of a gas-fired combined-cycle power plant with a gas turbine, a steam turbine, and an alternator — all rotating on a common shaft. A waste-heat boiler produces steam at two pressures using heat from the gas turbine flue gas. The transient behavior of the system predicted by the model for various upset situations appears physically reasonable and satisfactory for the operating constraints.

scholarly journals M21 Cruise Marine Combined Cycle Plant

1995 ◽  
Author(s):  
V. I. Romanov ◽  
O. G. Zhiritsky ◽  
A. V. Kovalenko ◽  
V. V. Lupandin
Keyword(s):  
Gas Turbine ◽  
Plant Development ◽  
Heat Recovery ◽  
Waste Heat Recovery ◽  
Waste Heat ◽  
Combined Cycle ◽  
Heat Recovery Boiler ◽  
Technical Data ◽  
Power Turbine ◽  
Combined Cycle Plant

The paper describes M21 cruise marine combined cycle plant for SLAVA class cruisers (COGAG arrangement). Three guided missile cruisers (Figure 1) are powered by these plants (two plants for each cruiser). During this plant development the more strict demands on weight and size had been taken into account as compared with M25 plants for merchant ships. The paper shows technical data of M21 combined cycle plant, descriptions and design features of SPA MASHPROEKT GT 6004R gas turbine with reversible free power turbine, waste-heat recovery boiler, steam turbine with a condenser and a common gear unit. More than 10 year service experience of these plants is shown in this paper.

Dynamic Modeling of a Combined-Cycle Plant

1990 ◽  
Vol 112 (2) ◽  
pp. 164-167 ◽  
Author(s):  
K. S. Ahluwalia ◽  
R. Domenichini
Keyword(s):  
Gas Turbine ◽  
Dynamic Modeling ◽  
Waste Heat ◽  
Control Strategies ◽  
Transient Behavior ◽  
Combined Cycle ◽  
Design Tool ◽  
Waste Heat Boiler ◽  
Combined Cycle Plant ◽  
Operating Constraints

Greater use is being made of dynamic simulation of energy systems as a design tool for selecting control strategies and establishing operating procedures. This paper discusses the dynamic modeling of a gas-fired combined-cycle power plant with a gas turbine, a steam turbine, and an alternator—all rotating on a common shaft. A waste-heat boiler produces steam at two pressures using heat from the gas turbine flue gas. The transient behavior of the system predicted by the model for various upset situations appears physically reasonable and satisfactory for the operating constraints.

Ansaldo Energia Gas Turbine Operating Experience With Low BTU Fuels

2004 ◽  
Author(s):  
Federico Bonzani ◽  
Giacomo Pollarolo
Keyword(s):  
Gas Turbine ◽  
Operating Experience ◽  
Industrial Process ◽  
Combined Cycle ◽  
Steel Mill ◽  
Fuel Gas ◽  
Process Modification ◽  
Wide Range ◽  
Combined Cycle Plant ◽  
Burner Design

The Gas Turbine market for low BTU fuels has become very important in Italy in the last decade mainly due to the chance for the private utilities to sell power to the grid at higher rates according to a national law (CIP6/1992) specifically dealing with recovery fuel use for gas turbine power generation. Ansaldo Energia has been engaged in three low BTU fuel projects in Italy dealing respectively with IGCC technology and steel mill fuel gas. Each of these plants has its own features which all in all gives a wide range of experiences in development and operation of gas turbine fired with low BTU fuels. The first project is the ISAB Priolo IGCC plant, whereas two V94.2K manufactured by Ansaldo Energia are in operation burning syngas from residual refinery gasification since 1999. Since the presence of fuel impurities coming from the gasifier a new design phase and a test campaign has been necessary to re-design the syngas burner, originally developed by Siemens PG, in order to overcome this problems. The engines are now successfully operating. The second project is the Elettra Servola combined cycle plant whereas a V94.2K manufactured by Ansaldo Energia is in operation since 2000 burning a mixture of steel mill gas and natural gas. During the successfully operation some burner design optimisation has been required in order to meet the industrial process modification. The third project is the ENIPower Ferrera Erbognone IGCC plant is under realisation and the relevant first firing will be expected on next January 2004. The syngas burner test campaign carried out has shown very promising results that have to be confirmed on site. The paper is showing the combustion concept relevant to the combustion system and is giving an overview about the operating experience achieved by Ansaldo Energia in this field mainly focusing on how the main critical aspects have been faced and overcome.

LNG Power Recovery

1994 ◽  
Vol 208 (1) ◽  
pp. 3-12 ◽  
Author(s):  
W Wong
Keyword(s):  
Sea Water ◽  
Waste Heat ◽  
Combined Cycle ◽  
Carnot Cycle ◽  
Power Station ◽  
Combined Cycle Plant ◽  
Lower Temperature ◽  
Cascade Refrigeration ◽  
Liquid Natural Gas ◽  
Power Recovery

The thermal efficiency of a Carnot cycle is limited by the maximum and minimum temperatures available. The construction of LNG (liquid natural gas) terminals and the need to vaporize LNG offers a cooling source at a very much lower temperature than sea water. By using the cold sink and by adapting the waste heat available from a combined cycle plant, it is possible to recover power from the vaporization of LNG. This is done by the use of a reverse cascade refrigeration process where energy is extracted by expanders instead of energy input by compressors. The paper explains how the hot and cold processes can be integrated to produce a compound cycle with an overall efficiency of some 55 per cent or more depending on the quantity of LNG to be vaporized. Special reference is given to the features needed for the rotating equipment and how equipment selection is critical to the realization of a practical working power station.

Design for the 145-MW Blast Furnace Gas Firing Gas Turbine Combined Cycle Plant

1989 ◽  
Vol 111 (2) ◽  
pp. 218-224 ◽  
Author(s):  
H. Takano ◽  
Y. Kitauchi ◽  
H. Hiura
Keyword(s):  
Blast Furnace ◽  
Gas Turbine ◽  
Large Scale ◽  
Combined Cycle ◽  
Inlet Temperature ◽  
Mixed Gas ◽  
Fuel Gas ◽  
Blast Furnace Gas ◽  
Combined Cycle Plant ◽  
Steel Works

A 145-MW blast furnace gas firing gas turbine combined cycle plant was designed and installed in a steel works in Japan as a repowering unit. A 124-MW large-scale gas turbine with turbine inlet temperature 1150°C (1423 K) was adopted as a core engine for the combined cycle plant. The fuel of this gas turbine is blast furnace gas mixed with coke oven gas. These are byproducts of steel works, and the calorific value of the mixed gas is controlled to be about 1000 kcal/Nm3 (4187 kJ/Nm3). A specially designed multicannular type combustor was developed to burn such a low Btu fuel. The gas turbine, generator, steam turbine, and fuel gas compressor are connected to make a single-shaft configuration. As a result of introducing the gas turbine combined cycle plant, the plant thermal efficiency was above 45 percent (at NET) and the total electricity generation in the works has increased from 243 MW to 317 MW. This paper describes the design features of this combined cycle plant.

Modern opportunities for preparation of ultra-pure water for feeding high-performance boiler plants

2020 ◽  
pp. 74-84
Author(s):  
A.A. Filimonova ◽  
◽  
N.D. Chichirova ◽  
A.A. Chichirov ◽  
A.A. Batalova ◽  
...  
Keyword(s):  
Gas Turbine ◽  
Gas Turbines ◽  
High Performance ◽  
Waste Heat ◽  
Pure Water ◽  
Combined Cycle ◽  
Feed Water ◽  
Operational Characteristics ◽  
Treatment Equipment

The article provides an overview of modern high-performance combined-cycle plants and gas turbine plants with waste heat boilers. The forecast for the introduction of gas turbine equipment at TPPs in the world and in Russia is presented. The classification of gas turbines according to the degree of energy efficiency and operational characteristics is given. Waste heat boilers are characterized in terms of design and associated performance and efficiency. To achieve high operating parameters of gas turbine and boiler equipment, it is necessary to use, among other things, modern water treatment equipment. The article discusses modern effective technologies, the leading place among which is occupied by membrane, and especially baromembrane methods of preparing feed water-waste heat boilers. At the same time, the ion exchange technology remains one of the most demanded at TPPs in the Russian Federation.

Gas Turbine Combined Cycle With CO2-Capture Using Auto-Thermal Reforming of Natural Gas

2000 ◽  
Author(s):  
Thormod Andersen ◽  
Hanne M. Kvamsdal ◽  
Olav Bolland
Keyword(s):  
Natural Gas ◽  
Gas Turbine ◽  
Process Integration ◽  
Combined Cycle ◽  
Co2 Removal ◽  
Gas Turbine Combustor ◽  
Chemical Absorption ◽  
Fuel Gas ◽  
The Impact ◽  
Water Gas

A concept for capturing and sequestering CO2 from a natural gas fired combined cycle power plant is presented. The present approach is to decarbonise the fuel prior to combustion by reforming natural gas, producing a hydrogen-rich fuel. The reforming process consists of an air-blown pressurised auto-thermal reformer that produces a gas containing H2, CO and a small fraction of CH4 as combustible components. The gas is then led through a water gas shift reactor, where the equilibrium of CO and H2O is shifted towards CO2 and H2. The CO2 is then captured from the resulting gas by chemical absorption. The gas turbine of this system is then fed with a fuel gas containing approximately 50% H2. In order to achieve acceptable level of fuel-to-electricity conversion efficiency, this kind of process is attractive because of the possibility of process integration between the combined cycle and the reforming process. A comparison is made between a “standard” combined cycle and the current process with CO2-removal. This study also comprise an investigation of using a lower pressure level in the reforming section than in the gas turbine combustor and the impact of reduced steam/carbon ratio in the main reformer. The impact on gas turbine operation because of massive air bleed and the use of a hydrogen rich fuel is discussed.

Performance Analysis of a Combined Cycle Power Plant Through Exergetic and Environmental Indices

2017 ◽  
Author(s):  
Edgar Vicente Torres González ◽  
Raúl Lugo Leyte ◽  
Martín Salazar Pereyra ◽  
Helen Denise Lugo Méndez ◽  
Miguel Toledo Velázquez ◽  
...  
Keyword(s):  
Power Plant ◽  
Gas Turbine ◽  
Gas Turbines ◽  
Combined Cycle ◽  
Environmental Indices ◽  
Combined Cycle Power Plant ◽  
Combustion Gases ◽  
Combined Cycle Plant ◽  
Exergetic Analysis ◽  
Gas Turbine Power Plant

In this paper is carried out a comparison between a gas turbine power plant and a combined cycle power plant through exergetic and environmental indices in order to determine performance and sustainability aspects of a gas turbine and combined cycle plant. First of all, an exergetic analysis of the gas turbine and the combined is carried out then the exergetic and environmental indices are calculated for the gas turbine (case A) and the combined cycle (case B). The exergetic indices are exergetic efficiency, waste exergy ratio, exergy destruction factor, recoverable exergy ratio, environmental effect factor and exergetic sustainability. Besides, the environmental indices are global warming, smog formation and acid rain indices. In the case A, the two gas turbines generate 278.4 MW; whereas 415.19 MW of electricity power is generated by the combined cycle (case B). The results show that exergetic sustainability index for cases A and B are 0.02888 and 0.1058 respectively. The steam turbine cycle improves the overall efficiency, as well as, the reviewed exergetic indexes. Besides, the environmental indices of the gas turbines (case A) are lower than the combined cycle environmental indices (case B), since the combustion gases are only generated in the combustion chamber.

scholarly journals High-Temperature Turbine Technology Readiness

1982 ◽  
Author(s):  
M. W. Horner ◽  
A. Caruvana
Keyword(s):  
High Temperature ◽  
Gas Turbine ◽  
Phase Ii ◽  
Combined Cycle ◽  
Technology Readiness ◽  
Inlet Temperature ◽  
Test Results ◽  
Turbine Inlet ◽  
Combined Cycle Plant ◽  
Gas Fuel

Final component and technology verification tests have been completed for application to a 2600°F rotor inlet temperature gas turbine. These tests have proven the capability of combustor, turbine hot section, and IGCC fuel systems and controls to operate in a combined cycle plant burning a coal-derived gas fuel at elevated gas turbine inlet temperatures (2600–3000°F). This paper presents recent test results and summarizes the overall progress made during the DOE-HTTT Phase II program.

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