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Title: RECENT DEVELOPMENTS IN GAS TURBINE MATERIALS AND TECHNOLOGY AND THE IMPLICATIONS FOR SYNGAS FIRING

Abstract

Gas turbine combined-cycle systems burning natural gas represent a reliable and efficient power generation technology that is widely used. A critical factor in their development was the rapid adaptation of aero-engine technology (single crystal airfoils, sophisticated cooling techniques, and thermal barrier coatings) in order to operate at the high rotor-inlet temperatures required for high efficiency operation. Early reliability problems have been largely overcome, so that this power generation systems is now considered to be a mature technology capable of achieving high levels of availability. Current interest in replacing natural gas with gas derived from coal (syngas or hydrogen) in these gas turbine systems focuses attention on implications for the critical turbine components. In this paper, the development requirements for materials for critical hot gas-path parts in large gas turbines burning coal-derived syngas fuels is briefly considered in the context of the state-of-the-art in materials for engines burning natural gas. It is shown that, despite some difficult design issues, many of the materials used in current engines will be applicable to units burning syngas. However, there is the potential that the durability of some components may be prejudiced since the combustion environment will contain a greater level of impurities (especially particulates).more » Consequently, effort to develop improved coatings to resist erosion and also attack by sulphur-containing compounds may be necessary.« less

Authors:
 [1];  [1]
  1. ORNL
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
FE USDOE - Office of Fossil Energy (FE)
OSTI Identifier:
936016
DOE Contract Number:
DE-AC05-00OR22725
Resource Type:
Journal Article
Resource Relation:
Journal Name: International Journal of Hydrogen Energy; Journal Volume: 32; Journal Issue: 16
Country of Publication:
United States
Language:
English
Subject:
01 COAL, LIGNITE, AND PEAT; 03 NATURAL GAS; 08 HYDROGEN; AIRFOILS; COAL; COATINGS; COMBUSTION; EFFICIENCY; ENGINES; GAS TURBINES; HYDROGEN; IMPURITIES; NATURAL GAS; PARTICULATES; POWER GENERATION; RELIABILITY; THERMAL BARRIERS; TURBINES; gas turbine materials; syngas turbines; hydrogen turbines

Citation Formats

Wright, Ian G, and Gibbons, Thomas. RECENT DEVELOPMENTS IN GAS TURBINE MATERIALS AND TECHNOLOGY AND THE IMPLICATIONS FOR SYNGAS FIRING. United States: N. p., 2007. Web. doi:10.1016/j.ijhydene.2006.08.049.
Wright, Ian G, & Gibbons, Thomas. RECENT DEVELOPMENTS IN GAS TURBINE MATERIALS AND TECHNOLOGY AND THE IMPLICATIONS FOR SYNGAS FIRING. United States. doi:10.1016/j.ijhydene.2006.08.049.
Wright, Ian G, and Gibbons, Thomas. Mon . "RECENT DEVELOPMENTS IN GAS TURBINE MATERIALS AND TECHNOLOGY AND THE IMPLICATIONS FOR SYNGAS FIRING". United States. doi:10.1016/j.ijhydene.2006.08.049.
@article{osti_936016,
title = {RECENT DEVELOPMENTS IN GAS TURBINE MATERIALS AND TECHNOLOGY AND THE IMPLICATIONS FOR SYNGAS FIRING},
author = {Wright, Ian G and Gibbons, Thomas},
abstractNote = {Gas turbine combined-cycle systems burning natural gas represent a reliable and efficient power generation technology that is widely used. A critical factor in their development was the rapid adaptation of aero-engine technology (single crystal airfoils, sophisticated cooling techniques, and thermal barrier coatings) in order to operate at the high rotor-inlet temperatures required for high efficiency operation. Early reliability problems have been largely overcome, so that this power generation systems is now considered to be a mature technology capable of achieving high levels of availability. Current interest in replacing natural gas with gas derived from coal (syngas or hydrogen) in these gas turbine systems focuses attention on implications for the critical turbine components. In this paper, the development requirements for materials for critical hot gas-path parts in large gas turbines burning coal-derived syngas fuels is briefly considered in the context of the state-of-the-art in materials for engines burning natural gas. It is shown that, despite some difficult design issues, many of the materials used in current engines will be applicable to units burning syngas. However, there is the potential that the durability of some components may be prejudiced since the combustion environment will contain a greater level of impurities (especially particulates). Consequently, effort to develop improved coatings to resist erosion and also attack by sulphur-containing compounds may be necessary.},
doi = {10.1016/j.ijhydene.2006.08.049},
journal = {International Journal of Hydrogen Energy},
number = 16,
volume = 32,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 2007},
month = {Mon Jan 01 00:00:00 EST 2007}
}
  • This paper describes a procedure used to model the performance of gas turbines designed to fire natural gas (or distillate oil) when fired on medium-Btu fuel, such as coal-derived syngas. Results from such performance studies can be used n the design or analysis of Gasification Combined Cycle (GCC) power plants. The primary difficulty when firing syngas in a gas turbine designed for natural gas is the tendency to drive the compressor toward surge. If the gas turbine has sufficient surge margin and mechanical durability, Gas Turbine Evaluation code (GATE) simulations indicated that net output power can be increased on themore » order of 15 percent when firing syngas due to the advantageous increase in the ratio of the expander-to-compressor mass flow rates. Three classes of single-spool utility gas turbines are investigated spanning firing temperatures form 1985{degrees}F-2500{degrees}F (1358 K-1644 K). Performance simulations at a variety of part-load and ambient temperature conditions are described; the resulting performance curves are useful in GCC power plant studies.« less
  • A mathematical analysis of small eigen vibrations of thin conical elastic shells is presented. The energetic method, which may be applied to shells of any pitch with supported edges, is used. Results for cylindrical shells are also obtained. Comparisons of experimental data and computations are presented tabularly. (J.R.D.)
  • Recent extensive tests of substitute fuels derived from coal liquefaction and shale oil focused on combustion and thermal efficiencies and emissions. The results indicate that these fuels perform well, and they can be used just as satisfactorily as the diesel oil for which the machine was designed. 4 figures, 1 table.
  • The economic performance of large turbines and generators can be considerably enhanced by on-line monitoring techniques. Economic rewards are generally accentuated by the size and age of the unit. The generator stator end-windings and the shaft potential represent two important turbine generator areas where monitoring capability has advanced. Two instruments are described that address these two turbine-generator systems. Experience with the fiberoptic vibration monitor is presented along with the author's limited experience with the active shaft grounding system. The benefits of integrating these monitors, and others, into an on-line artificial intelligence based diagnostic systems are discussed.