US4448025A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for recovering exhaust heat
Assignee: Individual
•
Filing: 1981-07-22
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Granted: 1984-05-15
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Expires: 2001-07-22
Abstract
Abstract The present invention relates to a process for recovering the exhaust heat using the working fluid of the toluene (or benzene)-water system in the vapor cycle, when the moderate heat energy of 400°-750° C. is converted into work. In practice, in order to obtain the maximum overall thermal efficiency ηm, the working fluid of the Rankine cycle in the recovery of exhaust heat of the temperature of 400°-700° C. is suitable to be the mixture of toluene (or benzene) and water containing 20-80 mol. % of water, while the working fluid of the reheating cycle in the recovery of exhaust heat of the temperature of 600°-750° C. is suitable to be the mixture of toluene (or benzene) and water containing 45-90 mol. % of water in considerations of the thermodynamic efficiency of vapor cycle, the performance of the exhaust heat boiler and other factors.
Inventors
- 👤 Kenichi Oda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:22
CPC Classifications
F; F01; F01K; F01K25/00; F01K25/06; Y; Y02; Y02E; Y02E20/00; Y02E20/16
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
61 words
A process for recovering heat using the working fluid in a turbine characterized in that the working fluid is a mixture of 30 to 80 mole % water and toluene, wherein said water and toluene mixture is insoluable at ambient temperature and wherein the vapor cycle heat energy in the temperature range of 400° to 750° C. is converted into work.
Claim 2
Dependent Claim
61 words
A process for recovering heat using the working fluid in a turbine characterized in that the working fluid is a mixture of 30 to 80 mole % water and toluene, wherein said water and toluene mixture is insoluable at ambient temperature and wherein the vapor cycle heat energy in the temperature range of 400° to 750° C. is converted into work.
Claim 3
Dependent Claim
61 words
A process for recovering heat using the working fluid in a turbine characterized in that the working fluid is a mixture of 60 to 90 mole % water and toluene, wherein said water and toluene mixture is insoluable at ambient temperature and wherein the vapor cycle heat energy in the temperature range of 600° to 750° C. is converted into work.
Claim 4
Dependent Claim
61 words
A process for recovering heat using the working fluid in a turbine characterized in that the working fluid is a mixture of 60 to 90 mole % water and toluene, wherein said water and toluene mixture is insoluable at ambient temperature and wherein the vapor cycle heat energy in the temperature range of 600° to 750° C. is converted into work.
Claim 5
Dependent Claim
59 words
A process for recovering heat using the working fluid in a turbine characterized in that the working fluid is a mixture of 20 to 75 mole % of benzene and water, wherein said benzene is slightly soluable in said water, and in the vapor cycle heat energy the temperature range of 400° to 700° C. is converted into work.
Claim 6
Dependent Claim
59 words
A process for recovering heat using the working fluid in a turbine characterized in that the working fluid is a mixture of 20 to 75 mole % of benzene and water, wherein said benzene is slightly soluable in said water, and in the vapor cycle heat energy the temperature range of 400° to 700° C. is converted into work.
Claim 7
Dependent Claim
59 words
A process for recovering heat using the working fluid in a turbine characterized in that the working fluid is a mixture of 45 to 80 mole % of benzene and water, wherein said benzene is slightly soluable in said water, and in the vapor cycle heat energy the temperature range of 600° to 750° C. is converted into work.
Claim 8
Dependent Claim
59 words
A process for recovering heat using the working fluid in a turbine characterized in that the working fluid is a mixture of 45 to 80 mole % of benzene and water, wherein said benzene is slightly soluable in said water, and in the vapor cycle heat energy the temperature range of 600° to 750° C. is converted into work.
References Cited (Backward Citations)
US3234734A
Cited
US3237403A
Cited
US3282048A
Cited
US3516248A
Cited
US3841099A
Cited
US3940939A
Cited
US4232525A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-05-15 | 1987-11-14 | 1988-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-15 | 1991-11-14 | 1992-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-15 | 1995-11-14 | 1996-05-15 | $7700.00 | Window Closed / Lapsed |