The steam-augmented gas turbine (SAGT) has attracted attention because of its increased fuel efficiency. It yields significant, cost-effective increments of output power, particularly when steam/water injection is increased to levels approaching 50 % of air flow. Such high levels of steam/water consumption permit burner operation near stoichiometric combustion ratios with specific powers exceeding 580 hp-sec/lb anticipated. This paper examines steam-augmented gas turbines for their applicability in Navy DDG-class ship environments. SAGT engine concepts exhibit efficiencies approaching the Navy's intercooled regenerative (ICR) engine, and an impressive compactness that arises from the high specific power of steam. Polished water consumption may be 425000 gal/day for a 100000-hp SAGT-engine ship plant. Nevertheless, SAGT engine systems impose little if any negative ship impact even after accounting for water purification systems. Moreover, because of their high specific power, SAGT systems are as affordable, on a first-acquisition-cost basis, as the current gas turbine systems in the fleet, and in the present supply pipeline.
A study of the feasibility of steam-augmented gas turbines for surface ships
Eine Untersuchung der Ausführung und Anwendung von Dampf-unterstützten Gasturbinen für Tragflächenboote
1993
9 Seiten, 9 Bilder, 10 Tabellen, 17 Quellen
Conference paper
English
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