US3338055A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Once-through vapor generator start-up system
Assignee: Foster Wheeler Inc
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Filing: 1966-06-08
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Granted: 1967-08-29
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Expires: 1986-06-08
Abstract
No abstract record available.
Inventors
- 👤 Walter P Gorzegno
- 👤 Albert J Zipay
- 👤 William D Stevens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:56
CPC Classifications
F; F01; F01K; F01K3/00; F01K3/18; F01K3/20; F01K3/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
157 words
A METHOD FOR STARTING-UP OF LOW LOAD OPERATION OF A ONCE-THROUGH VAPOR GENERATOR-TURBINE UNIT WHICH INCLUDES THE STEPS OF ESTABLISHING A MINIMUM FLOW AT OPERATING PRESSURE IN THE HIGH TEMPERATURE CIRCUITRY OF THE GENERATOR FOR COOLING THE CIRCUITRY; REDUCING THE PRESSURE OF THE FLOW UPSTREAM OF CONVECTION HEATING SURFACES OF THE GENERATOR WHEREBY THE FLOW IS REHEATED AT A REDUCED PRESSURE; PASSING A PORTION OF SAID REDUCED PRESSURE FLOW TO THE TURBINE TO SATISFY LOAD REQUIREMENTS ON THE TURBINE AND PASSING THE REMAINDER OF THE FLOW AT LEAST IN PART IN HEAT EXCHANGE WITH THE FEED TO THE GENERATOR; INCREASING OR DECREASING THE FLOW OF THE TURBINE IN RESPONSE TO LOAD REQUIREMENTS; PROVIDING SAID GENERATOR WITH A SIGNAL WHICH IN A FIRST INSTANCE REPRESENTS A MANUAL SET POINT FOR LOAD AND IN A SECOND INSTANCE REPRESENTS A REQUIRED LOAD DEMAND AS COMPARED TO TURBINE FIRST STAGE PRESSURE AND TURBINE THROTTLE PRESSURE; MODIFYING SAID SIGNAL TO A LIMITED
Claim 2
Independent Claim
157 words
A METHOD FOR STARTING-UP OF LOW LOAD OPERATION OF A ONCE-THROUGH VAPOR GENERATOR-TURBINE UNIT WHICH INCLUDES THE STEPS OF ESTABLISHING A MINIMUM FLOW AT OPERATING PRESSURE IN THE HIGH TEMPERATURE CIRCUITRY OF THE GENERATOR FOR COOLING THE CIRCUITRY; REDUCING THE PRESSURE OF THE FLOW UPSTREAM OF CONVECTION HEATING SURFACES OF THE GENERATOR WHEREBY THE FLOW IS REHEATED AT A REDUCED PRESSURE; PASSING A PORTION OF SAID REDUCED PRESSURE FLOW TO THE TURBINE TO SATISFY LOAD REQUIREMENTS ON THE TURBINE AND PASSING THE REMAINDER OF THE FLOW AT LEAST IN PART IN HEAT EXCHANGE WITH THE FEED TO THE GENERATOR; INCREASING OR DECREASING THE FLOW OF THE TURBINE IN RESPONSE TO LOAD REQUIREMENTS; PROVIDING SAID GENERATOR WITH A SIGNAL WHICH IN A FIRST INSTANCE REPRESENTS A MANUAL SET POINT FOR LOAD AND IN A SECOND INSTANCE REPRESENTS A REQUIRED LOAD DEMAND AS COMPARED TO TURBINE FIRST STAGE PRESSURE AND TURBINE THROTTLE PRESSURE; MODIFYING SAID SIGNAL TO A LIMITED
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-08-28 | 1971-02-27 | 1971-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-28 | 1975-02-27 | 1975-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-28 | 1979-02-27 | 1979-08-29 | $7700.00 | Window Closed / Lapsed |