US3717994A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas turbine system with regenerator bypass only during starting
Assignee: Motors Liquidation Co
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Filing: 1970-11-12
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Granted: 1973-02-27
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Expires: 1990-11-12
Abstract
Abstract A regenerative gas turbine engine has the engine compressor connected to the engine combustion apparatus through a regenerator in normal operation of the engine so as to heat the air prior to combustion. During starting of the engine, the regenerator is by-passed so that the compressed air warmed by compression will not be cooled in the regenerator.
Inventors
- 👤 J Templin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:36
CPC Classifications
F; F02; F02C; F02C7/00; F02C7/08
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
170 words
A regenerative gas turbine engine comprising, in combination, in flow sequence as recited, air compressor means, a regenerative heat exchanger, a first compressed air conduit leading from the compressor means through one pass of the heat exchanger to a combustion apparatus, the combustion apparatus, turbine means energized from the combustion apparatus including means driving the compressor means, and a turbine exhaust duct through the other pass of the heat exchanger; a second compressed air conduit leading from the compressor means to the combustion apparatus bypassing the heat exchanger; and means responsive to a condition of operation of the engine operative to direct at least substantially the entire compressor output through the first conduit during normal engine operation so as to provide air heated by the regenerator to the combustion apparatus and operative to direct at least substantially the entire compressor output through the second conduit during cold starting of the engine so as to prevent significant cooling of the compressor output to the combustion apparatus by the regenerator while starting.
Claim 2
Dependent Claim
170 words
A regenerative gas turbine engine comprising, in combination, in flow sequence as recited, air compressor means, a regenerative heat exchanger, a first compressed air conduit leading from the compressor means through one pass of the heat exchanger to a combustion apparatus, the combustion apparatus, turbine means energized from the combustion apparatus including means driving the compressor means, and a turbine exhaust duct through the other pass of the heat exchanger; a second compressed air conduit leading from the compressor means to the combustion apparatus bypassing the heat exchanger; and means responsive to a condition of operation of the engine operative to direct at least substantially the entire compressor output through the first conduit during normal engine operation so as to provide air heated by the regenerator to the combustion apparatus and operative to direct at least substantially the entire compressor output through the second conduit during cold starting of the engine so as to prevent significant cooling of the compressor output to the combustion apparatus by the regenerator while starting.
Claim 3
Dependent Claim
41 words
An engine as recited in claim 1 in which the last-mentioned means includes valve means effective to isolate the first pass of the regenerator from the second compressed air conduit so that the first pass is not pressurized during cold starting.
Claim 4
Dependent Claim
169 words
A regenerative gas turbine engine comprising, in combination, in flow sequence as recited, air compressor means, a regenerative heat exchanger, a first compressed air conduit leading from the compressor means through one pass of the heat exchanger to a combustion apparatus, the combustion apparatus, turbine means energized from the combustion apparatus including means driving the compressor means, and a turbine exhaust duct through the other pass of the heat exchanger; a second compressed air conduit leading from the compressor means to the combustion apparatus by-passing the heat exchanger; and means responsive to a condition of operation of the engine operative to direct at least substantially the entire compressor output through the first conduit during normal engine operation so as to provide air heated by the regenerator to the combustion apparatus and operative to direct at least substantially the entire compressor output through the second conduit when the regenerator is cold so as to prevent significant cooling of the compressor output to the combustion apparatus by the regenerator while cold.
Claim 5
Dependent Claim
169 words
A regenerative gas turbine engine comprising, in combination, in flow sequence as recited, air compressor means, a regenerative heat exchanger, a first compressed air conduit leading from the compressor means through one pass of the heat exchanger to a combustion apparatus, the combustion apparatus, turbine means energized from the combustion apparatus including means driving the compressor means, and a turbine exhaust duct through the other pass of the heat exchanger; a second compressed air conduit leading from the compressor means to the combustion apparatus by-passing the heat exchanger; and means responsive to a condition of operation of the engine operative to direct at least substantially the entire compressor output through the first conduit during normal engine operation so as to provide air heated by the regenerator to the combustion apparatus and operative to direct at least substantially the entire compressor output through the second conduit when the regenerator is cold so as to prevent significant cooling of the compressor output to the combustion apparatus by the regenerator while cold.
Claim 6
Dependent Claim
166 words
A regenerative gas turbine engine comprising, in combination, in flow sequence as recited, air compressor means, a regenerative heat exchanger, a first compressed air conduit leading from the compressor means through one pass of the heat exchanger to a combustion apparatus, the combustion apparatus, turbine means energized from the combustion apparatus including means driving the compressor means, and a turbine exhaust duct through the other pass of the heat exchanger; a second compressed air conduit leading from the compressor means to the combustion apparatus by-passing the heat exchanger; and means operative to direct the compressor output through the first conduit during normal engine operation so as to provide air heated by the regenerator to the combustion apparatus and operative to direct the compressor output through the second conduit during cold starting of the engine so as to preveNt cooling of the compressor output by the regenerator while starting, the last-recited means being responsive to compressor discharge temperature and to exhaust gas temperature downstream of the regenerator.
Claim 7
Dependent Claim
166 words
A regenerative gas turbine engine comprising, in combination, in flow sequence as recited, air compressor means, a regenerative heat exchanger, a first compressed air conduit leading from the compressor means through one pass of the heat exchanger to a combustion apparatus, the combustion apparatus, turbine means energized from the combustion apparatus including means driving the compressor means, and a turbine exhaust duct through the other pass of the heat exchanger; a second compressed air conduit leading from the compressor means to the combustion apparatus by-passing the heat exchanger; and means operative to direct the compressor output through the first conduit during normal engine operation so as to provide air heated by the regenerator to the combustion apparatus and operative to direct the compressor output through the second conduit during cold starting of the engine so as to preveNt cooling of the compressor output by the regenerator while starting, the last-recited means being responsive to compressor discharge temperature and to exhaust gas temperature downstream of the regenerator.
Claim 8
Independent Claim
151 words
A method of operating a regenerative gas turbine engine having, in flow sequence as recited, air compressor means, a regenerative heat exchanger, a first compressed air conduit leading from the compressor means through one pass of the heat exchanger to a combustion apparatus, the combustion apparatus, turbine means energized from the combustion apparatus including means driving the compressor means, and a turbine exhaust duct through the other pass of the heat exchanger, and having a second compressed air conduit leading from the compressor means to the combustion apparatus by-passing the heat exchanger; the method comprising directing the compressor output through the first conduit during normal engine operation so as to provide air heated by the regenerator as the combustion air for the combustion apparatus and directing the compressor output through the second conduit when the regenerator is cold so as to prevent cooling of the combustion air by the cold regenerator.
Claim 9
Independent Claim
151 words
A method of operating a regenerative gas turbine engine having, in flow sequence as recited, air compressor means, a regenerative heat exchanger, a first compressed air conduit leading from the compressor means through one pass of the heat exchanger to a combustion apparatus, the combustion apparatus, turbine means energized from the combustion apparatus including means driving the compressor means, and a turbine exhaust duct through the other pass of the heat exchanger, and having a second compressed air conduit leading from the compressor means to the combustion apparatus by-passing the heat exchanger; the method comprising directing the compressor output through the first conduit during normal engine operation so as to provide air heated by the regenerator as the combustion air for the combustion apparatus and directing the compressor output through the second conduit when the regenerator is cold so as to prevent cooling of the combustion air by the cold regenerator.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-27 | 1976-08-28 | 1977-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-27 | 1980-08-28 | 1981-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-27 | 1984-08-28 | 1985-02-27 | $7700.00 | Window Closed / Lapsed |