US3795103A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual fluid cycle
Assignee: Individual
•
Filing: 1971-09-30
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Granted: 1974-03-05
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Expires: 1991-09-30
Abstract
Abstract Power is extracted from a stream of hot fluid, such as geothermal water, by passing the stream in heat exchange relationship with a working fluid to vaporize the latter, expanding the vapor through a turbine, and condensing the vapor in a conventional Rankine cycle. Additional power is obtained in a second Rankine cycle by employing a portion of the hot fluid after heat exchange with the working fluid to vaporize a second working fluid having a lower boiling point and higher vapor density than the first fluid. Isobutane and R-22 (CH C1 F2) may be employed as the first and second working fluids, respectively.
Inventors
- 👤 J Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 02:26
CPC Classifications
F; F01; F01K; F01K3/00; F01K3/18; F01K3/185; F03; F03G; F03G4/00; F03G4/074; Y; Y02; Y02E; Y02E10/00; Y02E10/10
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
20 words
The method of claim 1 wherein said second power fluid has a higher vapor density than said first power fluid.
Claim 2
Dependent Claim
11 words
The method of claim 1 wherein said hot fluid is water.
Claim 3
Dependent Claim
12 words
The method of claim 2 wherein said first power fluid is isobutane.
Claim 4
Dependent Claim
12 words
The method of claim 4 wherein said second power fluid is R-22.
Claim 5
Dependent Claim
47 words
The method of claim 1 wherein said hot fluid is passed in heat exchange relationship with at least a third power fluid after said hot fluid has been passed in heat exchange relationship with said second power fluid to produce power in a vaporization and expansion cycle.
Claim 6
Dependent Claim
16 words
The method of claim 1 wherein said cooling fluid is a stream of recycled cooling water.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-03-04 | 1977-09-03 | 1978-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-04 | 1981-09-03 | 1982-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-04 | 1985-09-03 | 1986-03-05 | $7700.00 | Window Closed / Lapsed |