Progress on 2 MW STI8 gas turbine from Pratt & Whitney Canada

Journal Article · Wed Jan 01 04:00:00 EST 1997 · Diesel and Gas Turbine Worldwide

OSTI ID:460024

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.

• OSTI ID: 460024
• Journal Information: Diesel and Gas Turbine Worldwide, Journal Name: Diesel and Gas Turbine Worldwide Journal Issue: 1 Vol. 29; ISSN DGWODS; ISSN 0278-5994
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
33 ADVANCED PROPULSION SYSTEMS
CENTRIFUGATION
COGENERATION
COMBUSTION CHAMBERS
COMPRESSORS
DESIGN
EXHAUST GASES
FUEL CONSUMPTION
GAS TURBINES
NITROGEN OXIDES
TEMPERATURE DEPENDENCE