Alternative Fuels: Burner Concepts and Emission Characteristics of a Silo Combustor

Krockow, W.; Schabbehard, H.

doi:10.1115/82-gt-29

Cited by 3 publications

(3 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The KWU silo combustor results show: 1) much greater abatement for equivalent steam to fuel levels, 2) close agreement with calculations from simple kinetic models. These results are attributed by Krockow to the method of steam injection, which is steam/fuel mixing [2,9]. As the present study and the work of Bahr and Lyon [10] clearly show, mixing the steam and fuel does not result in agreement with kinetic calculations for jet-stirred combustors.…”

Section: Comparison With Other Researchcontrasting

confidence: 45%

Influence of Gas Turbine Combustor Design and Operating Parameters on Effectiveness of NOx Suppression by Injected Steam or Water

Touchton

1984

1984 Joint Power Generation Conference: GT Papers

View full text Add to dashboard Cite

Steam or water injection has become the state-of-the-art abatement technique for NO, , with steam strongly preferred for combined-cycle application. In combined-cycle plants, the degradation of the plant efficiency due to steam injection into the gas turbine combustor provides a powerful incentive for minimizing this flow over the entire plant operating map. This paper presents the results of extensive tests carried out on a variety of gas turbine combustor designs. Both test stand and field test data are presented. The usual fuel in the tests is methane; however, some data are presented for combustion of No. 2 distillate oil and intermediate Btu gas fuel. Similarly, the usual inert injected is steam, but some water injection data are included for comparison.The results support the conclusions:1. Steam and water injection suppress NO, exclusively through thermal mechanisms, i.e., by lowering the peak flame temperature.2. Design changes have little effect on NO, suppression effectiveness of steam or water in jet-stirred or swirl-mixed combustors.3. Primary zone injection of steam in methane-fueled, jetstirred combustors is equally effective whether the steam enters with an air stream or with the fuel stream.4. Water-to-fuel ratio corrected to equivalent energy content correlates NO, suppression effectiveness for turbulent diffusion flame combustors.1. Plant heat rate is degraded.2. Parts life is lessened due to increased combustor pressure pulsations.3. Water treatment costs are an economic penalty.

show abstract

Section: Comparison With Other Researchcontrasting

confidence: 45%

Influence of Gas Turbine Combustor Design and Operating Parameters on Effectiveness of NOx Suppression by Injected Steam or Water

Touchton

1984

1984 Joint Power Generation Conference: GT Papers

View full text Add to dashboard Cite

show abstract

“…The sensible heat of the raw gas from the gasifier lies usually at such a high level that high-grade main steam can be produced in the raw-gas heat-recovery steam generator (HRSG) (8). This main steam, together with that raised in the gas turbine exhaust-gas HRSG (14), is admitted to the steam turbine (15). This inclusion of the sensible heat of the raw gas via the HRSG in the steam cycle increases the steam turbine output above that of a standard GUD power plant.…”

Section: Basic Cyclementioning

confidence: 99%

The Development of Integrated Coal-Gasification Power Plants With Clean Combustion in Germany

Finckh

Mueller

1985

Volume 2: Coal, Biomass and Alternative Fuels; Combustion and Fuels

View full text Add to dashboard Cite

As advances are made in flue-gas clean-up systems, such as electrostatic precipitators, wet and dry desulfurization techniques and deNOX catalysers, the environmental impact of conventional steam turbine power plants fired with pulverized coal can be reduced at great expense in the form of additional capital investment and lowered station efficiency. The clean fuel gas obtainable from various coal-gasification processes, however, can be used to generate electricity with excellent efficiency and low-pollution emissions in low-cost unfired combined-cycle power plants of modular design. These are termed GUD power plants from the German designation “Gas und Dampf” meaning gas and steam. The overall efficiency is appreciably enhanced by closely integrating the gas-production process with the power generating cycle. Such an integrated coal-gasification combined-cycle installation should thus allow China to exploit its vast coal reserves for electrical energy production in both the most economical and environmentally acceptable way.

show abstract

“…Furthermore, silo combustors are better suited for flexible fuel operation. 3 For instance, in an integrated coal gasification combined cycle (IGCC) powerplant, a silo combustor hybrid burner can be equipped with a coal-gas or low BTU fuel injection system effectively. 4 Nonetheless, turbine inlet temperature distribution in silo combustors is highly non-uniform.…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation of non-uniform flow in twin-silo combustors and impact on axial turbine stage performance

Hassan

Javed

Khoja

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part A:

View full text Add to dashboard Cite

A clear understanding of the flow characteristics in the older generation of industrial gas turbines operating with silo combustors is important for potential upgrades. Non-uniformities in the form of circumferential and radial variations in internal flow properties can have a significant impact on the gas turbine stage performance and durability. This paper presents a comprehensive study of the underlying internal flow features involved in the advent of non-uniformities from twin-silo combustors and their propagation through a single axial turbine stage of the Siemens v94.2 industrial gas turbine. Results indicate the formation of strong vortical structures alongside large temperature, pressure, velocity, and flow angle deviations that are mostly located in the top and bottom sections of the turbine stage caused by the excessive flow turning in the upstream tandem silo combustors. A favorable validation of the simulated exhaust gas temperature (EGT) profile is also achieved via comparison with the measured data. A drop in isentropic efficiency and power output equivalent to 2.28% points and 2.1 MW, respectively is observed at baseload compared to an ideal straight hot gas path reference case. Furthermore, the analysis of internal flow topography identifies the underperforming turbine blading due to the upstream non-uniformities. The findings not only have implications for the turbine aerothermodynamic design, but also the combustor layout from a repowering perspective.

show abstract

Alternative Fuels: Burner Concepts and Emission Characteristics of a Silo Combustor

Cited by 3 publications

References 1 publication

Influence of Gas Turbine Combustor Design and Operating Parameters on Effectiveness of NOx Suppression by Injected Steam or Water

Influence of Gas Turbine Combustor Design and Operating Parameters on Effectiveness of NOx Suppression by Injected Steam or Water

The Development of Integrated Coal-Gasification Power Plants With Clean Combustion in Germany

Numerical investigation of non-uniform flow in twin-silo combustors and impact on axial turbine stage performance

Contact Info

Product

Resources

About