US7942001B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cascaded organic rankine cycles for waste heat utilization
Assignee: UTC Power Corp
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Filing: 2005-03-29
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Granted: 2011-05-17
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Expires: 2025-03-29
Abstract
Abstract A pair of organic Rankine cycle systems ( 20, 25 ) are combined and their respective organic working fluids are chosen such that the organic working fluid of the first organic Rankine cycle is condensed at a condensation temperature that is well above the boiling point of the organic working fluid of the second organic Rankine style system, and a single common heat exchanger ( 23 ) is used for both the condenser of the first organic Rankine cycle system and the evaporator of the second organic Rankine cycle system. A preferred organic working fluid of the first system is toluene and that of the second organic working fluid is R245fa.
Inventors
- 👤 Thomas D. Radcliff
- 👤 Bruce P. Biederman
- 👤 Joost J. Brasz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:55
CPC Classifications
F; F01; F01K; F01K23/00; F01K23/02; F01K23/04; F01K25/00; F01K25/08
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
127 words
A method of generating additional energy with an organic Rankine cycle system having in serial flow relationship a turbo generator for receiving a first organic fluid from a vapor generator, a heat exchanger, and a first pump for returning refrigerant to the vapor generator, comprising the steps of: providing a second organic Rankine cycle system having in serial flow relationship a second turbo generator for receiving a second organic working fluid from said heat exchanger, a first condenser, and a second pump for returning said second organic working fluid to said heat exchanger, wherein said first and second organic working fluids flow in heat exchange relationship through said heat exchanger, and wherein said first organic working fluid is toluene and said second organic working fluid is R245fa.
Claim 2
Independent Claim
127 words
A method of generating additional energy with an organic Rankine cycle system having in serial flow relationship a turbo generator for receiving a first organic fluid from a vapor generator, a heat exchanger, and a first pump for returning refrigerant to the vapor generator, comprising the steps of: providing a second organic Rankine cycle system having in serial flow relationship a second turbo generator for receiving a second organic working fluid from said heat exchanger, a first condenser, and a second pump for returning said second organic working fluid to said heat exchanger, wherein said first and second organic working fluids flow in heat exchange relationship through said heat exchanger, and wherein said first organic working fluid is toluene and said second organic working fluid is R245fa.
Claim 3
Dependent Claim
24 words
A method as set forth in claim 1 and including the step of desuperheating and condensing the first organic fluid in said heat exchanger.
Claim 4
Dependent Claim
25 words
A method as set forth in claim 1 and including the step of providing a second condenser between said heat exchanger and said first pump.
Claim 5
Dependent Claim
31 words
A method as set forth in claim 3 and including the steps of desuperheating said first organic fluid in said heat exchanger and condensing said first organic fluid in second condenser.
Claim 6
Dependent Claim
24 words
A method as set forth in claim 1 and including the step of providing a preheater between said second pump and said heat exchanger.
Claim 7
Dependent Claim
131 words
A combination of organic Rankine cycle systems comprising: a first organic Rankine cycle system having in serial flow relationship a first turbo generator for receiving a first organic working fluid from a vapor generator, a heat exchanger and a first pump returning said first organic working fluid to the vapor generator; and a second organic Rankine cycle system having in serial flow relationship a second turbo generator for receiving a second organic working fluid from said heat exchanger, a first condenser, and a second pump for returning said second organic working fluid to said heat exchanger, wherein said first and second organic working fluids are circulated in heat exchange relationship within said heat exchanger, and wherein said first organic working fluid is toluene and said second organic working fluid is R245fa.
Claim 8
Dependent Claim
131 words
A combination of organic Rankine cycle systems comprising: a first organic Rankine cycle system having in serial flow relationship a first turbo generator for receiving a first organic working fluid from a vapor generator, a heat exchanger and a first pump returning said first organic working fluid to the vapor generator; and a second organic Rankine cycle system having in serial flow relationship a second turbo generator for receiving a second organic working fluid from said heat exchanger, a first condenser, and a second pump for returning said second organic working fluid to said heat exchanger, wherein said first and second organic working fluids are circulated in heat exchange relationship within said heat exchanger, and wherein said first organic working fluid is toluene and said second organic working fluid is R245fa.
Claim 9
Dependent Claim
24 words
A combination as set forth in claim 6 wherein said heat exchanger is operated to both desuperheat and condense said first organic working fluid.
Claim 10
Dependent Claim
21 words
A combination as set forth in claim 6 and including a second condenser between said heat exchanger and said first pump.
Claim 11
Dependent Claim
35 words
A combination as set forth in claim 8 wherein said heat exchanger is applied to only desuperheat said first organic working fluid and said second condenser is applied to condense said first organic working fluid.
Claim 12
Dependent Claim
20 words
A combination as set forth in claim 6 and including a preheater between said second pump and said heat exchanger.
Claim 13
Independent Claim
146 words
A system for converting waste heat into energy comprising: a first organic Rankine cycle system having in serial flow relationship a vapor generator which is in heat exchange relationship with said waste heat, a first turbo generator for receiving a first organic working fluid from said vapor generator, a heat exchanger, a first condenser, and a first pump for returning said first organic working fluid to said vapor generator; and a second organic Rankine cycle system having in serial flow relationship a second turbo generator for receiving a second organic working fluid from said heat exchanger, a second condenser, and a second pump for returning said second organic working fluid to said heat exchanger, wherein said first organic working fluid passes to said heat exchanger at a first temperature and further wherein said temperature is substantially above a boiling temperature of said second organic working fluid.
Claim 14
Independent Claim
146 words
A system for converting waste heat into energy comprising: a first organic Rankine cycle system having in serial flow relationship a vapor generator which is in heat exchange relationship with said waste heat, a first turbo generator for receiving a first organic working fluid from said vapor generator, a heat exchanger, a first condenser, and a first pump for returning said first organic working fluid to said vapor generator; and a second organic Rankine cycle system having in serial flow relationship a second turbo generator for receiving a second organic working fluid from said heat exchanger, a second condenser, and a second pump for returning said second organic working fluid to said heat exchanger, wherein said first organic working fluid passes to said heat exchanger at a first temperature and further wherein said temperature is substantially above a boiling temperature of said second organic working fluid.
Claim 15
Dependent Claim
16 words
A system as set forth in claim 11 wherein said first organic working fluid is toluene.
Claim 16
Dependent Claim
16 words
A system as set forth in claim 11 wherein said second organic working fluid is R245fa.
Claim 17
Dependent Claim
35 words
A system as set forth in claim 11 wherein said heat exchanger is applied to only desuperheat said first organic working fluid and said first condenser is applied to condense said first organic working fluid.
Claim 18
Dependent Claim
20 words
A system as set forth in claim 11 and including a preheater between said second pump and said heat exchanger.
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