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Subject Keyword ADVANCED PROPULSION SYSTEMS ♦ ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION ♦ GAS TURBINES ♦ DESIGN ♦ COMPRESSORS ♦ CENTRIFUGATION ♦ EXHAUST GASES ♦ NITROGEN OXIDES ♦ COGENERATION ♦ TEMPERATURE DEPENDENCE ♦ COMBUSTION CHAMBERS ♦ FUEL CONSUMPTION
Abstract In 1995 Pratt & Whitney Canada announced their intention to offer industrial and marine versions of the PW100 series aircraft gas turbine widely used in turboprop applications. The new ST18 gas turbine is rated in the two megawatt range for industrial and marine applications and offers an especially compact and lightweight gas turbine for this output level. As in other aeroderivative designs from Pratt & Whitney Canada, headquartered in Longueuil, Quebec, the ST18 gas turbine features a centrifugal compressor design. The two-stage centrifugal compressor, with a unique high efficiency external pipe diffuser system connecting the low pressure and high pressure compressor, achieves an overall compression ratio of 15:1, with air flow of 7.7 kg/s. A relatively good thermal efficiency level of about 30% is achieved in this design. For exhaust emission control purposes, water injection in excess of a 1:1 ratio is utilized in the reverse flow annular combustion system to achieve less than 35 ppm NO{sub x} on natural gas fuel. This paper provides some of the design details of this gas turbine and changes made for the industrial and marine configuration. 4 figs.
ISSN 02785994
Educational Use Research
Learning Resource Type Article
Publisher Date 1997-01-01
Publisher Place United States
Journal Diesel and Gas Turbine Worldwide
Volume Number 29
Issue Number 1


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