US3818698A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Steam power plants
Assignee: Waagner Biro AG
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Filing: 1972-08-31
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Granted: 1974-06-25
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Expires: 1992-08-31
Abstract
Abstract A power plant which has an installation capable of accumulating energy during low-load periods and discharging the accumulated energy during peak-load periods. The installation includes steam accumulators which store a charge of steam under pressure until the energy thereof is required during a peak-load period. During discharge of the steam the pressure thereof gradually diminishes, and through a suitable conduit system the steam is delivered first to a turbine designed for optimum operation at an upper steam pressure range at which the steam is first discharged, and then steam is delivered to another turbine which is designed for optimum operation at a lower pressure range at which the steam is subsequently discharged, so that at any given instant the discharged steam operates only a turbine designed for optimum operation at the pressure at which the steam is discharged.
Inventors
- 👤 G Beckmann
- 👤 P Viktor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:58
CPC Classifications
F; F01; F01K; F01K3/00; F01K3/14
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
215 words
In a power plant having an installation for providing additional power during periods of peak load, said installation comprising an accumulator means for storing energy when said accumulator means is charged during periods of low load and for delivering steam which initially has a given maximum pressure and which gradually diminishes in pressure during discharge of said accumulator means, a plurality of turbine means respectively designed for operation at optimum efficiency at different sequential pressure ranges including within the range of steam pressure provided by said accumulator means during discharge thereof, and conduit means operatively connected on the one hand to said accumulator means and on the other hand to said plurality of turbine means for delivering steam from said accumulator means first to one of said turbine means which is designed to operate at the steam pressure which is delivered by said accumulator means and then to another of said turbine means which is designed to operate at the next lower pressure range when the pressure of the steam delivered by said accumulator means reaches said next lower pressure range, so that at any given inStant steam from said accumulator means is delivered only to a turbine means which is designed to operate at the particular pressure which is provided by said accumulator means.
Claim 2
Dependent Claim
215 words
In a power plant having an installation for providing additional power during periods of peak load, said installation comprising an accumulator means for storing energy when said accumulator means is charged during periods of low load and for delivering steam which initially has a given maximum pressure and which gradually diminishes in pressure during discharge of said accumulator means, a plurality of turbine means respectively designed for operation at optimum efficiency at different sequential pressure ranges including within the range of steam pressure provided by said accumulator means during discharge thereof, and conduit means operatively connected on the one hand to said accumulator means and on the other hand to said plurality of turbine means for delivering steam from said accumulator means first to one of said turbine means which is designed to operate at the steam pressure which is delivered by said accumulator means and then to another of said turbine means which is designed to operate at the next lower pressure range when the pressure of the steam delivered by said accumulator means reaches said next lower pressure range, so that at any given inStant steam from said accumulator means is delivered only to a turbine means which is designed to operate at the particular pressure which is provided by said accumulator means.
Claim 3
Dependent Claim
36 words
The combination of claim 1 and wherein said conduit means includes a plurality of conduits respectively communicating with said plurality of turbine means and valve means for respectively connecting said accumulator means sequentially to said conduits.
Claim 4
Dependent Claim
34 words
The combination of claim 1 and wherein a superheating means is operatively connected with said conduit means for superheating the steam delivered from said accumulator means before the steam reaches a given turbine means.
Claim 5
Dependent Claim
34 words
The combination of claim 1 and wherein a plurality of condenser means are respectively connected operatively with at least some of said turbine means for receiving steam therefrom and for condensing the latter steam.
Claim 6
Dependent Claim
49 words
The combination of claim 1 and wherein said plurality of turbine means are in the form of separate turbine units, and a single power-output shaft opertively connected with a generator for delivering power thereto, said several turbine units being distributed along and operatively connected with said single power-output shaft.
Claim 7
Dependent Claim
125 words
The combination of claim 1 and wherein said conduit means includes a plurality of separate conduits respectively communicating with said plurality of turbine means and all communicating with said accumulator means, at least half of the number of said turbine means being in the form of condenser turbines and a plurality of condenser means respectively operatively connected with said condenser turbines for receiving steam therefrom and for condensing the latter steam, the remainder of the number of turbine means including at least one back-pressure turbine communicating with that one of said conduits which delivers steam at the highest pressure range, and means connected between said back-pressure turbine and said one conduit for regulating the delivery of steam from said one conduit to said back-pressure turbine.
Claim 8
Dependent Claim
42 words
The combination of claim 6 and wherein a discharge conduit means communicates with said back-pressure turbine for receiving steam therefrom and communicates with one of said condenser turbines for delivering the steam discharged from said back-pressure turbine to said one condenser turbine.
Claim 9
Dependent Claim
41 words
The combination of claim 7 and wherein said discharge conduit means provides communication between said back-pressure turbine and that one of said conduits which delivers steam from said conduit means to the condenser turbine which operates at the lowest pressure range.
Claim 10
Dependent Claim
86 words
The combination of claim 1 and wherein a plurality of condenser means are respectively connected operatively to at least some of said turbine means for receiving steam from the latter and for condensing said steam said plurality of condenser means including a cooling-water conduit means progressing in series from one condenser means to the next so that the cooling water flows first through one of said condenser means and then through the next condenser means, whereby the condensing pressures are different at the dfferent condenser means.
Claim 11
Dependent Claim
40 words
The combination of claim 9 and wherein that one of said condenser turbines which operates with steam of the greatest inlet entropy is in communication with that one of said condenser means which receives cooling water at the lowest temperature.
Claim 12
Dependent Claim
99 words
The combination of claim 1 and wherein said power plant has in addition to said installation a primary turbine means and a primary condenser means communicating with said primary turbine means for receiving steam therefrom and for condensing the latter steam, auxiliary condenser means operatively connected with at least some of said turbine means of said installation for receiving steam therefrom and condensing the latter steam, cooling-water conduit means communicating both with said primary and said auxiliary condenser means for supplying cooling water thereto, and cooling means operatively connected wiTh said cooling-water conduit means for cooling the water therein.
Claim 13
Dependent Claim
68 words
The combination of claim 11 and wherein said cooling-water conduit means is common to said primary and auxiliary condenser means for providing a series-connection of the cooling water between said primary and auxiliary condenser means with the cooling water flowing first from said cooling means to said primary condenser means, then from the latter to said auxiliary condenser means, and from the latter back to said cooling means.
Claim 14
Dependent Claim
19 words
The combination of claim 12 and wherein said cooling means is in the form of a natural-draft cooling power.
Claim 15
Dependent Claim
117 words
In a method for operating a power plant, accumulating a charge of steam under pressure during a period of low-load operation, discharging the latter steam during a period of peak load operation, and delivering the discharged steam successively to at least two steam turbines designed respectively for optimum operation at two sequential steam pressure ranges while operating the turbine of the higher pressure range with discharged steam in a pressure range for which the latter turbine is designed and then terminating the operation of the later turbine and continuing the operation with the turbine of lower pressure range while delivering to the latter steam at a pressure for which the turbine of lower pressure range is designed.
Claim 16
Dependent Claim
117 words
In a method for operating a power plant, accumulating a charge of steam under pressure during a period of low-load operation, discharging the latter steam during a period of peak load operation, and delivering the discharged steam successively to at least two steam turbines designed respectively for optimum operation at two sequential steam pressure ranges while operating the turbine of the higher pressure range with discharged steam in a pressure range for which the latter turbine is designed and then terminating the operation of the later turbine and continuing the operation with the turbine of lower pressure range while delivering to the latter steam at a pressure for which the turbine of lower pressure range is designed.
Claim 17
Dependent Claim
59 words
In a method as recited in claim 14, condensing steam received from both of said turbines with a pair of condensers respectively connected to the latter turbines for receiving steam therefrom and for condensing the latter steam, and maintaining both of the condensers operating continuously to maintain a vacuum in both condensers even though the turbines are operated sequentially.
Claim 18
Dependent Claim
51 words
In a method as recited in claim 14 and wherein steam at the highest pressure range is delivered to a high pressure turbine with adjustable throttling of the steam delivered to the high pressure turbine for controlling the operation of the latter while unthrottled steam is delivered to the remaining turbines.
Claim 19
Dependent Claim
59 words
In a method as recited in claim 16 and wherein all of the turbines have a common power output, the throttling of the steam to the high pressure turbine being regulated for increasing the output thereof as the discharged steam is sequentially delivered to turbines designed for sequentially lower steam pressure ranges for maintaining a substantially constant power output.
References Cited (Backward Citations)
US2089915A
Cited
US2320586A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-24 | 1977-12-24 | 1978-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-24 | 1981-12-24 | 1982-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-24 | 1985-12-24 | 1986-06-25 | $7700.00 | Window Closed / Lapsed |