Patent EP0387775B1 successfully refreshed from Google Patents.
EP1016775A2
Expired / Lapsed
EP
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Waste heat recovery in an organic energy converter using an intermediate liquid cycle
Assignee: Ormat Industries Ltd
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Filing: 1999-12-23
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Granted: —
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Expires: 2019-12-23
Abstract
Abstract A heat recovery method and system that extracts heat from the exhaust of a gas turbine unit in a waste heat, heat exchanger and transfers the heat to an intermediate fluid, which can be pressurized water. The intermediate fluid in-turn transfers the heat to an organic working fluid resulting in the vaporization thereof. The vaporized organic working fluid drives a series of turbines which in turn drive a generator that generates electricity.
Inventors
- 👤 Lucien Y. Bronicki
- 👤 Nadav Amir
- 👤 Uri Kaplan
- 👤 Danny Batscha
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 06:12
CPC Classifications
F; F01; F01K; F01K23/00; F01K23/02; F01K23/06; F01K23/10; Y; Y02; Y02E; Y02E20/00; Y02E20/14; Y02E20/16
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
86 words
A method of generating power using exhaust gases from a gas turbine
unit comprising: heating an intermediate fluid with said exhaust gases; vaporizing an organic liquid working fluid with said heated intermediate
fluid in a vaporizer to form a vaporized working fluid and a heat depleted
intermediate fluid; expanding said vaporized working fluid in an organic vapor turbine for
generating power and producing an expanded vaporized working fluid; condensing said expanded vaporized working fluid to produce a
condensate; and transmitting the condensate back to said vaporizer.
Claim 2
Dependent Claim
23 words
A method as claimed in Claim 1 and further including preheating said
condensate with said heat depleted intermediate fluid before said vaporizing
step.
Claim 3
Dependent Claim
29 words
A method as claimed in Claim 2 and further including controlling the
amount of said condensate being preheated to a percentage of the total amount
of said intermediate fluid.
Claim 4
Dependent Claim
38 words
A method as claimed in Claim 2 and further including a further
preheating step of said condensate by heating said condensate with said
expanded vaporized working fluid before said condensate is preheated by said
heat depleted intermediate fluid.
Claim 5
Dependent Claim
13 words
A method as claimed in Claim 1 wherein said organic fluid is pentane.
Claim 6
Dependent Claim
14 words
A method as claimed in Claim 1, wherein said intermediate fluid is
pressurized water.
Claim 7
Independent Claim
125 words
A method of recovering energy from waste heat that is produced by a
power generating system comprising: providing a hot intermediate fluid heated by the waste heat; providing a gaseous working organic fluid vapor that has been vaporized
from a liquid by said hot intermediate fluid in a vaporizer in which a heat
depleted intermediate fluid is produced;
generating electrical power from said gaseous working organic fluid vapor with an electrical generator driven by an organic vapor turbine that is in
turn driven by said gaseous working organic fluid vapor, which produces an
expanded working fluid vapor; producing a condensate in a condenser from said working organic fluid
vapor after the use thereof in the organic vapor turbine; and providing said condensate to said vaporizer.
Claim 8
Dependent Claim
43 words
A method of recovering energy from waste heat as claimed in Claim 7,
and further including producing a preheated condensate before said
condensate is provided to said vaporizer with said heat depleted intermediate
fluid after the intermediate fluid has vaporized the organic fluid.
Claim 9
Dependent Claim
38 words
A method of recovering energy from waste heat as claimed in Claim 8,
and further including producing a preheated condensate with said expanded
vaporized working fluid vapor before said condensate is preheated by said heat
depleted intermediate fluid.
Claim 10
Dependent Claim
24 words
A method of recovering energy from waste heat as claimed in Claim
7 wherein said condensate is preheated with said expanded vaporized working
fluid.
Claim 11
Dependent Claim
20 words
A method of recovering energy from waste heat as claimed in Claim
7 wherein said intermediate fluid is pressurized water.
Claim 12
Dependent Claim
19 words
A method for recovering energy from waste heat as claimed in Claim
7 wherein said working fluid is pentane.
Claim 13
Dependent Claim
204 words
A heat recovery system that uses the heat produced by a power
generating source such as a gas turbine unit, the heat recovery system
comprising: a supply of heat from a power generating source; a heat recovery heat exchanger which receives said supply of heat and
in which an intermediate fluid is heated by the supply of heat; an intermediate fluid system containing an intermediate fluid and
including an intermediate fluid pump having an input and a discharge and
lines connected to said pump input and discharge and to said heat exchanger,
said lines containing and delivering said intermediate fluid; a vaporizer in which a vaporized organic working fluid is produced from a
liquid organic working fluid with heat contained in said intermediate fluid, said
lines connecting said heat recovery heat exchanger to said vaporizer and heat
depleted intermediate fluid being discharged from said vaporizer. an organic vapor turbine that is driven by the vaporized organic working
fluid and from which an expanded vaporized organic working fluid exits; a condenser in which said expanded vaporized organic working fluid
condenses into a condensate; and a main condensate pump that is supplied with condensate from said
condenser and in turn supplies the condensate to said vaporizer.
Claim 14
Dependent Claim
16 words
A heat recovery system as claimed in Claim 13 wherein said organic
working fluid is pentane.
Claim 15
Dependent Claim
19 words
A method for recovering energy from waste heat as claimed in
Claim 13 wherein said intermediate fluid is water.
Claim 16
Dependent Claim
34 words
A heat recovery system as claimed in Claim 13 wherein said
intermediate fluid is pressurized water having a pressure so that said water will
not freeze in temperatures found in cold climates on earth.
Claim 17
Dependent Claim
29 words
A heat recovery system as claimed in Claim 13 and further including
a preheater in which said condensate is heated with heat depleted intermediate
fluid before entering said vaporizer.
Claim 18
Dependent Claim
36 words
A heat recovery system as claimed in Claim 14, wherein said
intermediate fluid system further includes a pressurizer connected to a first line
located between the discharge of said intermediate fluid pump and said heat
exchanger.
Claim 19
Dependent Claim
41 words
A heat recovery system as claimed in Claim 16 wherein said
intermediate fluid system further includes a storage tank having an inlet and an
outlet, and a makeup liquid pump connected with conduits between said
storage tank and said first line.
Claim 20
Dependent Claim
63 words
A heat recovery system as claimed in Claim 18 and further including
a storage tank having an inlet and an outlet, and a pump connected with lines
between said storage tank and a first conduit located between the discharge of
said intermediate fluid pump and said heat exchanger; and wherein said
pressurizer includes a vent connection that is connected to said storage tank.
Claim 21
Dependent Claim
82 words
A heat recovery system as claimed in Claim 13 and further including
a preheater having a primary side containing a heat providing fluid and a
secondary side containing a heat receiving fluid, said preheater connected to
said vaporizer so as to receive therefrom said heat depleted intermediate fluid
on the primary side, and connected to said condensate pump so as to receive
condensate therefrom.on the secondary side thereof and to provide a further
heat depleted intermediate fluid.to said heat recovery heat exchanger.
Claim 22
Dependent Claim
89 words
A heat recovery system as claimed in Claim 13 wherein said heat
recovery heat exchange comprises a lower first set of coils having an input and
an output, an upper second set of coils having an input and an output, and a
cross-connect line connecting said first set of coils output to said input of said
second set of coils; and wherein said output of said intermediate fluid pump is connected to said
cross-connect conduit; and wherein said intermediate fluid pump discharges through a valve to said
cross-connect line.
References Cited (Backward Citations)
US5632143A
Cited
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