초록 ▼

A steam-injected free-turbine type of gas turbine is disclosed. In order to avoid the necessity of redesigning the compressor/core turbine, the shaft of the core turbine is modified to provide additional load output. As steam is injected into the system the resulting excess power of the core turbine

A steam-injected free-turbine type of gas turbine is disclosed. In order to avoid the necessity of redesigning the compressor/core turbine, the shaft of the core turbine is modified to provide additional load output. As steam is injected into the system the resulting excess power of the core turbine is taken out of the system by coupling the compressor output shaft with a load. Thus, the core turbine operates as a single shaft turbine in addition to the existing power turbine. A control provides control of the load output of the two turbine output shafts so that the compressor/turbine stays in the matched operating domain.

대표청구항 ▼

A method of operating a free turbine engine having at least a compressor, a core turbine mechanically coupled to said compressor to power it, and a power turbine, comprising the steps of: injecting steam into a working fluid in said free turbine engine, wherein said free turbine engine has a single

A method of operating a free turbine engine having at least a compressor, a core turbine mechanically coupled to said compressor to power it, and a power turbine, comprising the steps of: injecting steam into a working fluid in said free turbine engine, wherein said free turbine engine has a single flow path for substantially all of said working fluid and injected steam, first through said core turbine, and then through said power turbine; operating two independent loads from said free turbine engine, one load from said power turbine and a variable load from said compressor/core turbine; and controlling the amount of each of said loads such that core turbine/compressor mismatch is prevented.