US4590384A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and means for peaking or peak power shaving
Assignee: Ormat Industries Ltd
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Filing: 1983-03-25
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Granted: 1986-05-20
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Expires: 2003-03-25
Abstract
Abstract In a power plant which furnishes low-grade heat to a Rankin cycle turbo generator operating with an organic fluid, a fast-starting prime mover is selectively coupled to the generator, the generator capacity of the generator is oversized relative to the individual capacities of the turbine in the prime mover.
Inventors
- 👤 Lucien Y. Bronicki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:15
CPC Classifications
F; F01; F01K; F01K23/00; F01K23/12; F01K23/14; F01K25/00; F01K25/08; F02; F02B; F02B1/00; F02B1/02; F02B1/04; Y; Y02; Y02E; Y02E20/00; Y02E20/14; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
73 words
In a power plant that furnishes low grade heat to an organic fluid Rankine cycle turbine that drives a generator, the improvement comprising the steps of oversizing the generating capacity of the generator relative to the individual capacities of the turbine and the prime mover, and selectively starting and coupling a fast starting prime mover to the generator in response to sensing a load on the generator in excess of a predetermined threshold.
Claim 2
Dependent Claim
73 words
In a power plant that furnishes low grade heat to an organic fluid Rankine cycle turbine that drives a generator, the improvement comprising the steps of oversizing the generating capacity of the generator relative to the individual capacities of the turbine and the prime mover, and selectively starting and coupling a fast starting prime mover to the generator in response to sensing a load on the generator in excess of a predetermined threshold.
Claim 3
Dependent Claim
14 words
The invention of claim 1 wherein the prime mover is an internal combustion engine.
Claim 4
Dependent Claim
17 words
The invention of claim 2 wherein the turbine and the internal combustion engine are substantially equal capacity.
Claim 5
Dependent Claim
13 words
The invention of claim 2 wherein the internal combustion engine is a diesel.
Claim 6
Dependent Claim
87 words
A peaking or peak shaving power plant comprising: (a) a source of low grade heat; (b) a Rankine cycle turbine utilizing an organic working fluid; (c) a boiler responsive to said low grade heat for vaporizing the working fluid; (d) a generator driven by the turbine and having a generating capacity in excess of the capacity of the turbine; (e) a prime mover with a work capacity less than the generating capacity of the generator; and (f) means for selectively coupling the prime mover to the generator.
Claim 7
Dependent Claim
87 words
A peaking or peak shaving power plant comprising: (a) a source of low grade heat; (b) a Rankine cycle turbine utilizing an organic working fluid; (c) a boiler responsive to said low grade heat for vaporizing the working fluid; (d) a generator driven by the turbine and having a generating capacity in excess of the capacity of the turbine; (e) a prime mover with a work capacity less than the generating capacity of the generator; and (f) means for selectively coupling the prime mover to the generator.
Claim 8
Dependent Claim
20 words
A peaking or peak shaving power plant according to claim 5 wherein the prime mover is an internal combustion engine.
Claim 9
Dependent Claim
20 words
A peaking or peak shaving power plant according to claim 6 wherein the internal combustion engine is a diesel engine.
Claim 10
Dependent Claim
21 words
A peaking or peak power plant according to claim 7 wherein the source of low grade heat is a solar pond.
Claim 11
Dependent Claim
19 words
A peak shaving power plant according to claim 7 wherein the source of low grade heat is geothermal heat.
Claim 12
Dependent Claim
23 words
A peak shaving power plant according to claim 7 wherein the source of low grade heat is waste heat from an industrial process.
Claim 13
Dependent Claim
44 words
A peak shaving power plant according to claim 7 wherein the generator supplies power to a local grid, the power plant including means responsive to the load on the grid for starting up and operating the diesel engine whenever said load exceeds a threshold.
Claim 14
Independent Claim
67 words
A method for peaking or peak power shaving in a system having a predetermined threshold electrical load comprising the steps of coupling a first power source to a generator whose capacity exceeds that of the first power source and which supplies part of said load, sensing said electrical load, and coupling a second, fast starting power source to the generator in response to sensing of said threshold.
Claim 15
Independent Claim
67 words
A method for peaking or peak power shaving in a system having a predetermined threshold electrical load comprising the steps of coupling a first power source to a generator whose capacity exceeds that of the first power source and which supplies part of said load, sensing said electrical load, and coupling a second, fast starting power source to the generator in response to sensing of said threshold.
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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) | 1989-05-19 | 1989-11-18 | 1990-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-05-19 | 1993-11-18 | 1994-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-05-19 | 1997-11-18 | 1998-05-20 | $7700.00 | Window Closed / Lapsed |