US3785145A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas turbine power plant
Assignee: Motors Liquidation Co
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Filing: 1971-11-10
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Granted: 1974-01-15
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Expires: 1991-11-10
Abstract
Abstract A regenerative fuel-fired gas turbine power plant includes ducting and a valve to direct some of the engine exhaust into the engine inlet where it mixes with air flowing into the compressor of the engine. This recirculation of exhaust gases is controlled so that it takes place substantially only during the warm-up period of the engine after it is started and brought up to idling speed, and until the regenerator has been brought to something like normal operating temperature. Recirculation volume is controlled by a temperature in the engine.
Inventors
- 👤 C Amann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:01
CPC Classifications
F; F02; F02C; F02C9/00; F02C9/16; F02C7/00; F02C7/08; F02C7/10
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
99 words
A gas turbine power plant comprising air compressor means, combustion apparatus supplied by the compressor means, turbine means energized by the combustion apparatus and connected to drive the compressor means, and a regenerator for heating the air flowing from the compressor means by the turbine exhaust, characterized by conduit means for recirculating turbine exhaust gas from downstream of the regenerator into the inlet of the compressor means, a valve in the conduit means, and means effective to open the valve after starting the power plant and to close the valve after warm-up of the heat exchange means has occurred.
Claim 2
Dependent Claim
99 words
A gas turbine power plant comprising air compressor means, combustion apparatus supplied by the compressor means, turbine means energized by the combustion apparatus and connected to drive the compressor means, and a regenerator for heating the air flowing from the compressor means by the turbine exhaust, characterized by conduit means for recirculating turbine exhaust gas from downstream of the regenerator into the inlet of the compressor means, a valve in the conduit means, and means effective to open the valve after starting the power plant and to close the valve after warm-up of the heat exchange means has occurred.
Claim 3
Dependent Claim
116 words
A gas turbine power plant comprising air compressor means, combustion apparatus supplied by the compressor means, turbine means energized by the combustion apparatus and connectEd to drive the compressor means, and a regenerator for heating the air flowing from the compressor means by the turbine exhaust, characterized by conduit means for recirculating turbine exhaust gas from downstream of the regenerator into the inlet of the compressor means, a valve in the conduit means, means effective to open the valve after starting the power plant, means effective to control the valve opening in response to a temperature in the power plant, and means effective to close the valve after warm-up of the heat exchange means has occurred.
Claim 4
Dependent Claim
116 words
A gas turbine power plant comprising air compressor means, combustion apparatus supplied by the compressor means, turbine means energized by the combustion apparatus and connectEd to drive the compressor means, and a regenerator for heating the air flowing from the compressor means by the turbine exhaust, characterized by conduit means for recirculating turbine exhaust gas from downstream of the regenerator into the inlet of the compressor means, a valve in the conduit means, means effective to open the valve after starting the power plant, means effective to control the valve opening in response to a temperature in the power plant, and means effective to close the valve after warm-up of the heat exchange means has occurred.
Claim 5
Dependent Claim
119 words
A gas turbine power plant comprising air compressor means, combustion apparatus by the compressor means, turbine means energized by the combustion apparatus and connected to drive the compressor means, and a regenerator for heating the air flowing from the compressor means by the turbine exhaust, characterized by conduit means for recirculating turbine exhaust gas from downstream of the regenerator into the inlet of the compressor means, a valve in the conduit means, means effective to open the valve when the power plant reaches idling speed after starting, means effective to control the valve opening in response to a temperature in the power plant, and means effective to close the valve upon acceleration of the power plant from idling speed.
Claim 6
Dependent Claim
119 words
A gas turbine power plant comprising air compressor means, combustion apparatus by the compressor means, turbine means energized by the combustion apparatus and connected to drive the compressor means, and a regenerator for heating the air flowing from the compressor means by the turbine exhaust, characterized by conduit means for recirculating turbine exhaust gas from downstream of the regenerator into the inlet of the compressor means, a valve in the conduit means, means effective to open the valve when the power plant reaches idling speed after starting, means effective to control the valve opening in response to a temperature in the power plant, and means effective to close the valve upon acceleration of the power plant from idling speed.
Claim 7
Dependent Claim
101 words
A regenerative fuel-burning gas turbine engine including means to mix cooled turbine exhaust gas with air entering the engine during warm-up of the regenerator of the engine after starting, the mixing means including valve means for controlling exhaust gas flow into the engine and control means for the valve including means effective to open the valve when the engine starting cycle is completed, means responsive to a temperature in the engine effective to control the valve opening, and means effective to close the valve after an engine warm-up period, the two last-recited means each being effective to override the valve-opening means.
Claim 8
Dependent Claim
101 words
A regenerative fuel-burning gas turbine engine including means to mix cooled turbine exhaust gas with air entering the engine during warm-up of the regenerator of the engine after starting, the mixing means including valve means for controlling exhaust gas flow into the engine and control means for the valve including means effective to open the valve when the engine starting cycle is completed, means responsive to a temperature in the engine effective to control the valve opening, and means effective to close the valve after an engine warm-up period, the two last-recited means each being effective to override the valve-opening means.
Claim 9
Dependent Claim
106 words
A regenerative fuel-burning gas turbine engine including means to mix cooled turbine exhaust gas with air entering the engine during warm-up of the regenerator of the engine after starting, the mixing means including valve means for controlling exhaust gas flow into the engine and control means for the valve including means effective to open the valve when the engine starting cycle is completed, means responsive to a temperature in the engine effective to control the valve opening, and means effective to close the valve upon acceleration of the engine from an idle operating condition, the two last-recited means each being effective to override the valve-opening means.
Claim 10
Dependent Claim
106 words
A regenerative fuel-burning gas turbine engine including means to mix cooled turbine exhaust gas with air entering the engine during warm-up of the regenerator of the engine after starting, the mixing means including valve means for controlling exhaust gas flow into the engine and control means for the valve including means effective to open the valve when the engine starting cycle is completed, means responsive to a temperature in the engine effective to control the valve opening, and means effective to close the valve upon acceleration of the engine from an idle operating condition, the two last-recited means each being effective to override the valve-opening means.
Claim 11
Dependent Claim
135 words
A regenerative fuel-burning gas turbine engine having a starter and including means to mix cooled turbine exhaust gas with air entering the engine during warm-up of the regenerator of the engine after starting, the mixing means including valve means for controlling exhaust gas flow into the engine and control means for the valve means including means responsive to engine speed effective to open the valve after a predetermined engine speed is reached, means responsive to a temperature in the engine effective to move the valve in a closing direction in response to a predetermined temperature, timing means effective to close the valve a predetermined interval after starting, and engine power demand responsive means effective to close the valve upon demand for engine acceleration, the three last-recited means each being effective to override the valve-opening means.
Claim 12
Dependent Claim
135 words
A regenerative fuel-burning gas turbine engine having a starter and including means to mix cooled turbine exhaust gas with air entering the engine during warm-up of the regenerator of the engine after starting, the mixing means including valve means for controlling exhaust gas flow into the engine and control means for the valve means including means responsive to engine speed effective to open the valve after a predetermined engine speed is reached, means responsive to a temperature in the engine effective to move the valve in a closing direction in response to a predetermined temperature, timing means effective to close the valve a predetermined interval after starting, and engine power demand responsive means effective to close the valve upon demand for engine acceleration, the three last-recited means each being effective to override the valve-opening means.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-14 | 1977-07-16 | 1978-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-14 | 1981-07-16 | 1982-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-14 | 1985-07-16 | 1986-01-15 | $7700.00 | Window Closed / Lapsed |