Patent EP0471405A1 successfully refreshed from Google Patents.
Patent US2212954A successfully refreshed from Google Patents.
US3946801A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recuperator
Assignee: Alstom Power Inc
•
Filing: 1974-08-08
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Granted: 1976-03-30
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Expires: 1994-08-08
Abstract
Abstract A recuperative heat exchanger for a gas turbine or similar source of intermittent heat having an auxiliary heating unit that provides heat to maintain the heat exchanger at a substantially constant temperature when heat being exhausted from the gas turbine varies. Included also are controls that vary the supply of heat being given off by the auxiliary heating unit to compensate for changing operating conditions and provide a gradual heating or cooling of the unit to preclude thermal distortion and structural damage from an unstable temperature.
Inventors
- 👤 Richard L. Brunell
- 👤 Jerry J. Wright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 01:56
CPC Classifications
F; F02; F02C; F02C6/00; F02C6/18
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
113 words
Heat exchange apparatus that provides supplemental heating of the heat exchange structure including means that retard a change of temperature to obviate thermal shock thereof comprising in combination a housing having an inlet and an outlet for a heating fluid, inlet and outlet ducts in said housing that direct a fluid to be heated in heat exchange relation with the heating fluid, auxiliary heat generating means connected to the inlet for the heating fluid, means responsive to the temperature of the heating fluid, and means responsive to said temperature responsive means controlling the auxiliary heat generating means whereby the auxiliary heat generating means varies in accordance with the temperature of the heating fluid.
Claim 2
Dependent Claim
113 words
Heat exchange apparatus that provides supplemental heating of the heat exchange structure including means that retard a change of temperature to obviate thermal shock thereof comprising in combination a housing having an inlet and an outlet for a heating fluid, inlet and outlet ducts in said housing that direct a fluid to be heated in heat exchange relation with the heating fluid, auxiliary heat generating means connected to the inlet for the heating fluid, means responsive to the temperature of the heating fluid, and means responsive to said temperature responsive means controlling the auxiliary heat generating means whereby the auxiliary heat generating means varies in accordance with the temperature of the heating fluid.
Claim 3
Dependent Claim
47 words
Heat exchange apparatus as defined in claim 1 wherein the means controlling the auxiliary heat generating means is inversely proportional to the temperature at the inlet whereby the temperature of the air heated by the heat generating means increases as the temperature of the heating fluid decreases.
Claim 4
Dependent Claim
19 words
Heat exchange apparatus as defined in claim 1 including a timing device that controls the auxiliary heat generating means.
References Cited (Backward Citations)
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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) | 1979-03-30 | 1979-09-29 | 1980-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-30 | 1983-09-29 | 1984-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-30 | 1987-09-29 | 1988-03-30 | $7700.00 | Window Closed / Lapsed |