Patent US5799484A successfully refreshed from Google Patents.
US5799484A
Expired / Lapsed
US
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Dual turbogenerator auxiliary power system
Assignee: Honeywell International Inc
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Filing: 1997-04-15
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Granted: 1998-09-01
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Expires: 2017-04-15
Abstract
Abstract An auxiliary power system comprises two turbogenerators sharing a single combustor for delivery of elevated pressure and temperature gas to both the turbogenerators, a single fuel system for supplying elevated pressure fuel to the single combustor, and a single electronic unit for conditioning the electrical power input and output. The auxiliary power system also comprises first and second recuperator means operating in association with the dual turbogenerators for transferring heat from turbine exhaust to air entering the single combustor. The entire recuperator volume is used in both the single and dual turbogenerator operating modes.
Inventors
- 👤 Robert A. Nims
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:15
CPC Classifications
F; F02; F02C; F02C7/00; F02C7/08; F01; F01D; F01D15/00; F01D15/10; F01D21/00; F01D21/02; F02C6/00; F02C6/02; F02C9/00; F02C9/26; F02C9/42; F05; F05D; F05D2220/00; F05D2220/50; Y; Y02; Y02E; Y02E20/00; Y02E20/14
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
120 words
An auxiliary power system comprising: a first turbogenerator having an associated first turbine, first compressor and first generator mounted on a first high-speed shaft; a second turbogenerator having an associated second turbine, second compressor and second generator mounted on a second high-speed shaft; a single electronic unit for conditioning externally supplied electrical power for startup/motoring of the first and second turbogenerators; a single combustor for delivery of elevated pressure and temperature gas to both the first and second turbogenerators; a single fuel system for safely supplying elevated pressure fuel to the single combustor; and first and second recuperator means operating in association with the first and second turbogenerators for transferring heat from turbine exhaust to air entering the single combustor.
Claim 2
Dependent Claim
120 words
An auxiliary power system comprising: a first turbogenerator having an associated first turbine, first compressor and first generator mounted on a first high-speed shaft; a second turbogenerator having an associated second turbine, second compressor and second generator mounted on a second high-speed shaft; a single electronic unit for conditioning externally supplied electrical power for startup/motoring of the first and second turbogenerators; a single combustor for delivery of elevated pressure and temperature gas to both the first and second turbogenerators; a single fuel system for safely supplying elevated pressure fuel to the single combustor; and first and second recuperator means operating in association with the first and second turbogenerators for transferring heat from turbine exhaust to air entering the single combustor.
Claim 3
Dependent Claim
22 words
An auxiliary power system as claimed in claim 1 wherein the first and second turbogenerators comprise essentially identical one-half rated power turbogenerators.
Claim 4
Dependent Claim
31 words
An auxiliary power system as claimed in claim 1 wherein the first turbogenerator comprises a first partial rated power turbogenerator and the second turbogenerator comprises a second partial rated power turbogenerator.
Claim 5
Dependent Claim
27 words
An auxiliary power system as claimed in claim 3 wherein the first partial rated power and the second partial rated power total a full rated power value.
Claim 6
Dependent Claim
25 words
An auxiliary power system as claimed in claim 1 further comprising means for operating the system in a single or a dual turbogenerator operating mode.
Claim 7
Dependent Claim
24 words
An auxiliary power system as claimed in claim 5 wherein the entire recuperator volume is used in both single and dual turbogenerator operating modes.
Claim 8
Dependent Claim
31 words
An auxiliary power system as claimed in claim 1 wherein the single electronic unit further comprises means for supervising, controlling and monitoring critical parameters and operation of the auxiliary power system.
Claim 9
Dependent Claim
21 words
An auxiliary power system as claimed in claim 1 wherein the system has high thermal cycle efficiency throughout its operating range.
Claim 10
Dependent Claim
23 words
An auxiliary power system as claimed in claim 8 wherein the operating range is from about 10% to about 100% of rated power.
Claim 11
Dependent Claim
31 words
An auxiliary power system as claimed in claim 1 wherein the first and second generators are configured to rotate at the same speed as the respective associated shaft, compressor and turbine.
Claim 12
Dependent Claim
32 words
An auxiliary power system as claimed in claim 1 wherein the single electronic unit further comprises means for conditioning electrical power input for turbogenerator startup and electrical power output of the system.
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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) | 2001-08-31 | 2002-03-02 | 2002-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-08-31 | 2006-03-02 | 2006-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-08-31 | 2010-03-02 | 2010-09-01 | $7700.00 | Window Closed / Lapsed |