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RESEARCH PAPERS: Gas Turbines: Marine

Investigation of the Part-Load Performance of Two 1.12 MW Regenerative Marine Gas Turbines

[+] Author and Article Information
T. Korakianitis, K. J. Beier

Department of Mechanical Engineering, Washington University, St. Louis, MO 63130

J. Eng. Gas Turbines Power 116(2), 418-423 (Apr 01, 1994) (6 pages) doi:10.1115/1.2906837 History: Received February 04, 1992; Revised February 23, 1994; Online April 24, 2008

Abstract

Regenerative and intercooled-regenerative gas turbine engines with low pressure ratio have significant efficiency advantages over traditional aero-derivative engines of higher pressure ratios, and can compete with modern diesel engines for marine propulsion. Their performance is extremely sensitive to thermodynamic-cycle parameter choices and the type of components. The performances of two 1.12 MW (1500 hp) regenerative gas turbines are predicted with computer simulations. One engine has a single-shaft configuration, and the other has a gas-generator/power-turbine combination. The latter arrangement is essential for wide off-design operating regime. The performance of each engine driving fixed-pitch and controllable-pitch propellers, or an AC electric bus (for electric-motor-driven propellers) is investigated. For commercial applications the controllable-pitch propeller may have efficiency advantages (depending on engine type and shaft arrangements). For military applications the electric drive provides better operational flexibility.

Copyright © 1994 by The American Society of Mechanical Engineers
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