scholarly journals Thermodynamic Study of Coupled Steam-Gas Turbine Plant With Steam Extraction and Injection

1995 ◽  
Author(s):  
Zheng Qun ◽  
Li Shunglong ◽  
Yang Yaogen
Keyword(s):  
Steam Turbine ◽  
Gas Turbine ◽  
Waste Heat ◽  
Heat Recovery Boiler ◽  
Feed Water ◽  
Exhaust Gas ◽  
Water Heater ◽  
Turbine Plant ◽  
Steam Turbine Plant ◽  
Gas Turbine Plant

A type of coupled steam–gas turbine plant is proposed here. It is composed of a regenerative extraction steam turbine and a steam injected gas turbine. Extracted steam of the regenerative extraction steam cycle is not used to heat water through the regenerative feed–water heater as in conventional plant, but injected into a gas turbine to augment the output of the gas turbine, while the exhaust gas of the gas turbine now displaces the extracted steam to heat the feed water of the steam turbine plant. The proposed repowering turbine plant has two merits: the further utilization of extraction steam and the elimination of the complicated waste heat recovery boiler of a conventional steam injected gas turbine plant, in favor of a gas–to–water heat exchanger.

Analysis and Optimization of a Hybrid MCFC-Steam Turbine Plant

2003 ◽  
Author(s):  
P. Lunghi ◽  
R. Bove
Keyword(s):  
Fuel Cells ◽  
Steam Turbine ◽  
Gas Turbine ◽  
Ambient Pressure ◽  
Heat Content ◽  
Inlet Temperature ◽  
Exhaust Gas ◽  
Steam Generation ◽  
Turbine Plant ◽  
Steam Turbine Plant

Fuel Cells are high efficiently chemical energy conversion devices and their promising high performance are recognized by all the scientific community. Their conversion efficiency can be further enhanced recycling the heat content of the exhaust gas for CHP applications or for a bottoming cycle. For this kind of application, high temperature fuel cells (MCFC and SOFC) particularly suit, because outlet gas temperature is relatively high. In previous works (Desideri U. et al. 2001, Lunghi P. and Ubertini S. 2001, Lunghi P., Bove R. and Desideri U. 2002) the possibility of combining an ambient pressure MCFC with a gas turbine has been deeply investigated. Results showed very promising performance only if new designed turbines will be available for an optimised plants combination. The inlet temperature for gas turbine, in fact, is sensible higher than exhaust gas from fuel cell anode and so additional fuel is needed in the bottoming cycle, leading a system efficiency reducing. For this reason, in a previous work (Lunghi P. and Bove R. 2003) it was analyzed the possibility using as bottoming cycle a Steam Turbine Plant equipped with a HRSG for steam generation. In the present work suitable MCFC and Steam Turbine sizes are chosen and a performance analysis is conducting, through numerical simulations. Results showed very high electric efficiency reachable with this plant configuration.

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.

scholarly journals The Effects of Steam Injection in Combustion Air on the Thermal Efficiency and the Specific Work Output of a Stationary Gas Turbine Plant

1989 ◽  
Author(s):  
K. S. Varma ◽  
Asgharali I. Khandwawala ◽  
S. A. Asif
Keyword(s):  
Gas Turbine ◽  
Waste Heat ◽  
Steam Injection ◽  
Specific Work ◽  
Work Output ◽  
Waste Heat Boiler ◽  
Turbine Plant ◽  
Gas Turbine Plant ◽  
Cycle Efficiency ◽  
The Impact

In the present study a stationary open cycle gas turbine plant, including a thermal regenerator has been theoretically analyzed to assess the impact of steam addition in combustion air, on its performance. the effect of varying steam upto 15% air at different pressure ratios and turbine inlet temperatures have been reported. Mixing of steam in air results in higher values of cycle efficiency and increased specific work output, feasibility to generate steam needed for the purpose in a waste heat boiler have also been studied.

scholarly journals Application of Steam Jet Injector for Latent Heat Recovery of Marine Steam Turbine Propulsion Plant

2018 ◽  
Vol 1 (1) ◽  
pp. 235-244 ◽  
Author(s):  
Szymon Grzesiak ◽  
Andrzej Adamkiewicz
Keyword(s):  
Steam Turbine ◽  
Latent Heat ◽  
Waste Heat ◽  
Research Directions ◽  
Turbine Plant ◽  
Steam Turbine Plant ◽  
De Laval Nozzle ◽  
Liquid Natural Gas ◽  
The Heat Balance ◽  
Previous Identification

Abstract This paper presents the results of previously carried out analyses regarding efficiency and criteria evaluation of various propulsion plants of modern LNG (Liquid Natural Gas) carriers. The results of previous identification and quality assessment of waste heat energy sources of a CST (Conventional Steam Turbine) plant are presente. In this paper the possibility of use a steam jet injector in order to recover the latent heat is analysed. Calculations were carried out for an injector equipped with a de Laval nozzle, determining the thermodynamic state parameters of the mixture of drive steam and sucked in steam as well as the steam on the outlet of the injector for the various ejection ratios. On the basis of the results of the injector calculation, the heat balance of a simple regenerative Clausius – Rankine steam cycle (with one regenerative heater – deaerator) was carried out. The degree of regeneration (increase of the thermal efficiency) for cycle using the regenerative injector was determined. Based on results the further research directions for complex plants using a steam jets are indicated.

scholarly journals The Mojave Cogeneration Project Unit 2

1991 ◽  
Author(s):  
J. L. (Larry) Redmond ◽  
Ezio Marson
Keyword(s):  
Steam Turbine ◽  
Gas Turbine ◽  
Waste Heat Recovery ◽  
Waste Heat ◽  
Electrical Power ◽  
Plant Performance ◽  
Heat Recovery Boiler ◽  
Performance Tests ◽  
Industrial Gas Turbine ◽  
Turbine Exhaust

A cogeneration application of the CW251B10 industrial gas turbine is described in this paper. The gas turbine will generate electrical power and steam from a waste heat recovery boiler located downstream of the turbine exhaust. The steam generated by the boiler will be used to generate additional power in a Westinghouse condensing steam turbine. Steam will be extracted from the steam turbine for use in the plant and for injection into the gas turbine for NOx emission reduction. A description of the plant and components is included. Site performance tests results are presented and compared to the original predicted engine and plant performance.

scholarly journals Influence of inter nal relative efficiency of steam turbine compartments on the performance of steam turbine cogeneration plant

2018 ◽  
Vol 69 ◽  
pp. 02006
Author(s):  
Elena Stepanova ◽  
Alexey Maksimov
Keyword(s):  
Steam Turbine ◽  
Relative Efficiency ◽  
Combustion Products ◽  
Feed Water ◽  
Steam Boiler ◽  
Cogeneration Plant ◽  
Performance Indices ◽  
Turbine Plant ◽  
Electric Capacity ◽  
Steam Turbine Plant

The paper considers a steam turbine cogeneration plant that includes a back-pressure steam turbine and a natural gas-fired steam boiler that enables exhaust gas heat recovery, which is rather promising for the isolated heat and electricity consumers. A design and verification mathematical model of the steam turbine plant was developed. The focus is made on the optimization studies into the effect of the relative efficiency of turbine compartments on the performance indices of the steam turbine cogeneration plant with an installed electric capacity of 50 MW that uses the heat of steam contained in the combustion products of the boiler for heating the feed-water of the heat network.

Gas Turbines Versus Steam Reliability Analysis for a Warship Propulsion Plant

1968 ◽  
Author(s):  
D. H. Benn
Keyword(s):  
Gas Turbine ◽  
Gas Turbines ◽  
High Reliability ◽  
Plant Design ◽  
Turbine Plant ◽  
Marine Propulsion ◽  
Simple Arrangement ◽  
Twin Screw ◽  
Steam Turbine Plant ◽  
Gas Turbine Plant

Methods of mathematical analysis are reviewed for defining and numerically computing the reliability of warship propulsion systems. Experimental analysis is made of a twin-screw all-gas-turbine plant design for a small warship and the results are compared with computed figures previously published for a geared-steam-turbine plant. It is apparent that relatively simple arrangement of components in subsystems is an inherent advantage of the gas turbine plant from the reliability standpoint and that this type of plant has a potential for high reliability. The analysis was made possible by the availability of component MTBF figures taken from past experience. It is hoped that this will encourage users of marine propulsion equipment to compile and present additional reliability statistics and possibly complete reliability analyses of propulsion plants currently in service.

Combined Cycle for Process Gas Compression

1974 ◽  
Author(s):  
R. E. Sieck ◽  
N. P. Baudat ◽  
J. I. Alyea
Keyword(s):  
Steam Turbine ◽  
Gas Turbine ◽  
Waste Heat ◽  
Combined Cycle ◽  
Heat Recovery Boiler ◽  
Processing Plant ◽  
Gas Processing ◽  
Process Gas ◽  
Gas Compression ◽  
Combined Cycles

The desire to extract ethane and propane from the natural gas produced by off-shore wells in the Gulf of Mexico, led to the erection of the Cryogenic Gas Processing Plant near Erath, Louisiana. This paper describes the application of a combined cycle (gas/steam turbine) for gas compression and transmission. The installation is none of, if not, the largest and most efficient combined cycles in mechanical drive service, capable of handling over 1200 MMscf/d of gas. The installation incorporates a gas turbine rated 46,800 hp at ISO conditions and a steam turbine rated 29,700 hp. In addition, the cycle incorporates the use of gas turbine variable inlet guide vanes, a supplementary fired waste heat recovery boiler and forced draft fan for independent steam turbine operation.

Available Systems for the Conversion of Waste Heat to Electricity

2014 ◽  
Author(s):  
N. Tauveron ◽  
S. Colasson ◽  
J.-A. Gruss
Keyword(s):  
Gas Turbine ◽  
Waste Heat ◽  
Organic Rankine Cycle ◽  
Rankine Cycle ◽  
Combined Cycle ◽  
Maximum Temperature ◽  
Thermodynamic Efficiency ◽  
Turbine Plant ◽  
Wide Range ◽  
Gas Turbine Plant

The conversion of heat into electricity, generally speaking heat-to-power generation, is a wide area of technologies and applications. This paper focuses on available systems, excepted the internal combustion cycles, applied to transform (waste) heat to power. Data of referenced market proved or time-to-market technologies are presented. A database of more than 1100 references has been built. The following categories can be found: Rankine Cycle plant, Organic Rankine Cycle plant, Steam engine, Kalina Cycle plant, Brayton cycle plant, micro gas turbine, closed cycle gas turbine plant, combined cycle gas turbine plant, Stirling engine, Ericsson engine and thermoelectric generator. We intentionally target a range of power from Watts to hundreds of MW, covering the range of temperature [80–1000°C] usually addressed by these systems. The comparison of performances is hereby discussed and compared to thermodynamic principles and theoretical results in the graph Maximum temperature [°C] versus Thermodynamic efficiency. Comparison with Carnot and Chambadal-Novikov-Curzon-Ahlborn efficiencies are performed. A more original contribution is the presentation of the graph Power [W] versus Thermodynamic efficiency. The analysis reveals a monotonous trend inside each technology. Furthermore this general behavior covers a very wide range of power, including technological transitions. Finally, the position of each technology in the map Maximum temperature [°C] versus Power [W] is also analyzed. Explanations based on thermodynamics and techno-economic approaches are proposed.

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