US20140000261A1 - Triple expansion waste heat recovery system and method - Google Patents
Triple expansion waste heat recovery system and method Download PDFInfo
- Publication number
- US20140000261A1 US20140000261A1 US13/538,323 US201213538323A US2014000261A1 US 20140000261 A1 US20140000261 A1 US 20140000261A1 US 201213538323 A US201213538323 A US 201213538323A US 2014000261 A1 US2014000261 A1 US 2014000261A1
- Authority
- US
- United States
- Prior art keywords
- working fluid
- expander
- waste heat
- heat recovery
- flow
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K25/00—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for
- F01K25/08—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours
- F01K25/10—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours the vapours being cold, e.g. ammonia, carbon dioxide, ether
- F01K25/103—Carbon dioxide
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K23/00—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids
- F01K23/02—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K7/00—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating
- F01K7/02—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being of multiple-expansion type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K7/00—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating
- F01K7/16—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being only of turbine type
- F01K7/22—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being only of turbine type the turbines having inter-stage steam heating
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/14—Combined heat and power generation [CHP]
Abstract
A waste heat recovery system is provided. The waste heat recovery system includes a Rankine cycle system for circulating a working fluid. The Rankine cycle system includes at least one first waste heat recovery boiler configured to transfer heat from a heat source to the working fluid. The Rankine cycle system also includes a first expander configured to receive the heated working fluid from the at least one first waste heat recovery boiler. Further, the Rankine cycle system includes a second expander and a third expander coupled to at least one electric generator. The waste heat recovery system also includes a condenser configured to receive the working fluid at low pressure from the first expander, the second expander and the third expander for cooling and a pump connected to the condenser for receiving a cooled and condensed flow of the working fluid from the condenser.
Description
- The present application relates generally to power generation and, more particularly, to a system and method for recovering waste heat from a plurality of heat sources having different temperatures for the generation of electricity.
- Many industrial power requirements could benefit from power generation systems that provide electricity or mechanical power with minimum environmental impact and that may be readily integrated into existing power grids or rapidly sited as stand-alone units. Combustion engines such as gas turbines or large reciprocating engines are suitable for power generation in industrial applications but rely on increasingly costly fuel and also generate emissions and waste heat. One method to generate electricity from the waste heat of a combustion engine without increasing the output of emissions and without requiring additional fuel is to apply a bottoming cycle. Bottoming cycles use waste heat from a heat source, such as an engine, and convert that thermal energy into electricity. Rankine cycles are often applied as the bottoming cycle for large combustion engines. Rankine cycles are also used to generate power from geothermal or industrial heat sources. A fundamental Rankine cycle includes a turbogenerator, a boiler, a condenser and a feed pump.
- In one conventional system provided to generate electricity from waste heat, a Rankine cycle system using carbon dioxide as working fluid is used along with a recuperator. However, the amount of heat that can be recovered from the waste heat source is limited as a boiler inlet temperature of the working fluid increases after passing the recuperator. The boiler efficiency declines and the heat input as well as power output is limited.
- There is therefore a need for an efficient Rankine cycle system that utilizes the most waste heat and generates an increased net power output.
- In accordance with an embodiment of the invention, a waste heat recovery system is provided. The waste heat recovery system includes a Rankine cycle system for circulating a working fluid. The Rankine cycle system includes at least one first waste heat recovery boiler configured to transfer heat from a heat source to the working fluid. The Rankine cycle system also includes a first expander configured to receive the heated working fluid from the at least one first waste heat recovery boiler. Further, the Rankine cycle system includes a second expander and a third expander coupled to at least one electric generator. The waste heat recovery system also includes a condenser configured to receive the working fluid at low pressure from the first expander, the second expander and the third expander for cooling and a pump connected to the condenser for receiving a cooled and condensed flow of the working fluid from the condenser, wherein the pump is configured for pumping the condensed working fluid to a primary flow of the working fluid into the first waste heat recovery boiler, a secondary flow of the working fluid into the second expander and a tertiary flow of the working fluid into the third expander.
- In accordance with an embodiment of the invention, a waste heat recovery system is provided. The waste heat recovery system includes a Rankine cycle system for circulating a working fluid. The Rankine cycle system includes at least one first waste heat recovery boiler configured to transfer heat from a stream of hot gases or flue gases to the working fluid. The Rankine cycle system also includes a first expander configured to receive the heated working fluid from the at least one first waste heat recovery boiler. Further, the Rankine cycle system includes a second expander coupled to the first expander and a third expander coupled to the second expander such that the first expander, the second expander and the third expander are coupled directly or indirectly to each other in series and further coupled to a generator. The waste heat recovery system also includes a condenser configured to receive the working fluid at low pressure from the first expander, the second expander and the third expander for cooling. Further, the waste heat recovery system includes a pump connected to the condenser for receiving a cooled and condensed flow of the working fluid from the condenser, wherein the pump is configured for pumping the condensed working fluid to a primary flow of the working fluid into the first waste heat recovery boiler, a secondary flow of the working fluid into the second expander via a first recuperator and a tertiary flow of the working fluid into the third expander via a second recuperator. Furthermore, the waste heat recovery system includes at least one second waste heat recovery boiler configured for heating the secondary flow of the working fluid exiting the first recuperator prior to entering the second expander.
- In accordance with an embodiment of the invention, a method of recovering waste heat for power generation using a working fluid in a Rankine cycle is provided. The method includes pumping a primary flow of the working fluid though at least one first waste heat recovery boiler for transferring heat from a stream of hot gases or flue gases to the working fluid. The method also includes expanding the heated primary flow of the working fluid through a first expander. Further, the method includes pumping a secondary flow of the working fluid through a second expander and pumping a tertiary flow of the working fluid through a third expander. Finally, the method includes passing a combination of the primary flow of the working fluid, the secondary flow of the working fluid and the tertiary flow of the working fluid exiting the first expander, second expander and the third expander respectively through an auxiliary precooler and a condenser for condensing the combination of the working fluid and further passing to a pump.
- These and other features, aspects, and advantages of the present invention will become better understood when the following detailed description is read with reference to the accompanying drawings in which like characters represent like parts throughout the drawings, wherein:
-
FIG. 1 is a diagrammatical representation of a cycle of a recuperated waste heat recovery system in accordance with an embodiment of the present invention. -
FIG. 2 is an illustrative diagram of the cycle shown inFIG. 1 as represented by a temperature-entropy diagram in accordance with an embodiment of the present invention. -
FIG. 3 is a diagrammatical representation of a cycle of a recuperated waste heat recovery system in accordance with another embodiment of the present invention. -
FIG. 4 is a flow chart illustrating exemplary steps involved in a method of recovering waste heat for power generation using a working fluid in a Rankine cycle in accordance with an embodiment of the present invention. - When introducing elements of various embodiments of the present invention, the articles “a,” “an,” “the,” and “said” are intended to mean that there are one or more of the elements. The terms “comprising,” “including,” and “having” are intended to be inclusive and mean that there may be additional elements other than the listed elements. Any examples of operating parameters are not exclusive of other parameters of the disclosed embodiments.
-
FIG. 1 is a diagrammatical representation of a cycle of a recuperated wasteheat recovery system 10 in accordance with an embodiment of the present invention. The wasteheat recovery system 10 includes a Rankinecycle system 12 for circulating a workingfluid 14. In one embodiment, the working fluid is a supercritical carbon dioxide. The Rankinecycle system 12 includes at least one first wasteheat recovery boiler 16 configured to transfer heat from a heat source to the workingfluid 14. The Rankinecycle system 12 also includes afirst expander 18 configured to receive the heated workingfluid 14 from the at least one first wasteheat recovery boiler 16. Further, the Rankinecycle system 12 includes asecond expander 20 coupled to thefirst expander 18. Furthermore, the Rankinecycle system 12 includes athird expander 22 coupled to thesecond expander 20 such that the first expander 18, thesecond expander 20 and thethird expander 22 are coupled directly or indirectly to each other in series and further coupled to agenerator 24. Non-limiting example of theexpanders first expander 18 orsecond expander 20 or thethird expander 22 may be coupled independently to different generators. In another embodiment, the first expander 18, second expander 20 and thethird expander 22 may be coupled through gearboxes. The wasteheat recovery system 10 also includes acondenser 26 configured to receive the workingfluid 14 atlow pressure stage 6 from thefirst expander 18, the second expander 20 and the third expander 22 for cooling. In one embodiment, thecondenser 26 utilizes a flow ofcold fluid 27 for cooling the workingfluid 14. Further, the waste heat recovery system includes apump 28 connected to thecondenser 26 for receiving a cooled and condensed flow of the workingfluid 14 from thecondenser 26. Thepump 28 is configured for pumping the condensed workingfluid 14 to a primary flow (indicated by arrow 30) of the workingfluid 14 into the first wasteheat recovery boiler 16, a secondary flow (indicated by arrow 32) of the workingfluid 14 into thesecond expander 20 and a tertiary flow (indicated by arrow 34) of the workingfluid 14 into thethird expander 22. Since the working fluid carbon dioxide has a rather low critical temperature, condensation like in a normal Rankine cycle may not be attainable under warm ambient conditions. It needs to be understood that in this system thecondenser 26 shall not be strictly limited to a device that fully condenses the working fluid to a liquid state but can also be a device that may only cool the gas to dense, supercritical state. Likewise thepump 28 may not only pump a liquid but also transfer and pressurize a gas leaving thecondenser 26. - In one embodiment, the first waste
heat recovery boiler 16 includes a heat exchanger section configured to transfer heat from a first stream of hot gases or a first flow offlue gases 17 to the primary flow (indicated by arrow 30) of the workingfluid 14 entering thefirst expander 18. As shown inFIG. 1 , the Rankinecycle system 12 also includes afirst recuperator 36 configured to transfer heat from theprimary flow 30 of the workingfluid 14 exiting thefirst expander 18 to thesecondary flow 32 of the workingfluid 14 prior to entering into thesecond expander 20. In one embodiment, thefirst recuperator 36 is an intermediate temperature recuperator. Further, the Rankinecycle system 12 includes asecond recuperator 38 configured to transfer heat from asecondary flow 32 of the working fluid exiting thesecond expander 20 to thetertiary flow 34 of the workingfluid 14 prior to entering into thethird expander 22. In one embodiment, thesecond recuperator 38 is a low temperature recuperator. - Furthermore, in one embodiment, the
Rankine cycle system 12 includes an auxiliary cooler 40 for precooling a combined flow of theprimary flow 30 of workingfluid 14, thesecondary flow 32 of workingfluid 14 and thetertiary flow 34 of the workingfluid 14 after exiting from thefirst expander 18, thesecond expander 20 and thethird expander 22 respectively prior to entering thecondenser 26. In a combined heat and power (CHP) system, the heat attained in the auxiliary cooler 40 from precooling may be used for an external process. In one embodiment, theauxiliary cooler 40 utilizes the heat attained from precooling in theRankine cycle system 12 by transferring the heat to theprimary flow 30 of the workingfluid 14 for preheating prior to entering the wasteheat recovery boiler 16. - As shown in
FIG. 1 , the cycle of thewaste heat recovery 10 includes onemain loop cycle 42 indicated bystages heat recovery system 10 also includes asecond loop cycle 44 and athird loop cycle 46 that are parallel to themain loop cycle 42. Such cascading of the second and third loop cycles 44, 46 efficiently harnesses additional remaining superheat using the first recuperator and second recuperator from the expanded carbon dioxide (working fluid 14) after expansion in first andsecond expanders FIG. 1 , thesecond loop cycle 44 is indicated bystages second loop cycle 46 is indicated bystages -
FIG. 2 is an illustrative diagram of thecycle 10 shown inFIG. 1 as represented by a temperature-entropy diagram 50 in accordance with an embodiment of the present invention. The temperature (degree Celsius) is shown on the vertical Y-axis and the entropy (kilojoules per Kelvin) on the horizontal X-axis. The temperature-entropy diagram 50 clearly indicated the main loop cycle 42 (indicated by stages 1-2-3H-4H-5H-6-1), the second loop cycle 44 (indicated by stages 1-2-3I-4I-5I-6-1), and the third loop cycle 46 (indicated by stages 1-2-3L-4L-6-1). In themain loop cycle 42, the liquid working fluid 14 (shown inFIG. 1 ) coming from thecondenser 26 is pumped to a very high pressure (e. g. 300 bar) atstage 2 and subsequently heated in the wasteheat recovery boiler 16. After being heated to a temperature approaching that of the waste heat source, the workingfluid 14 generates power in a first expander 18 (shown inFIG. 1 ). The workingfluid 14 undergoes an expansion process during which the temperature and pressure of the workingfluid 14 drop in thestage 3H to 4H. Further, the lowpressure working fluid 14 exiting thefirst expander 18 is cooled in the first recuperator 36 (shown inFIG. 1 ) where the working fluid transfers heat to thesecondary flow 32 of working fluid 14 (as shown inFIG. 1 ) that is diverted from theprimary flow 30 of the workingfluid 14 after the pump. Thissecondary flow 32 also expands in the second expander 20 (stage 31 to 41) that is operating at lower temperature and again heats thetertiary flow 34 of the working fluid (shown inFIG. 1 ) in the same manner in asecond recuperator 38, where the temperature further drops fromstate 41 to 51. In one embodiment, thesecondary flow 32 can optionally be heated further in an additional heat exchanger section in a waste heat recovery boiler to a higher temperature, possibly as high as the first stream. Thetertiary flow 34 of the working fluid 14 (shown inFIG. 1 ) is also diverted from the high pressure line (primary flow 30) after the pump and after being heated by thesecondary flow 32 in the second recuperator 38 (as shown inFIG. 1 ), expands in thethird expander 22 fromstate 3L to 4L, and is subsequently combined with theprimary flow 30 and thesecondary flow 32 at low pressure atstage 6. In one embodiment, the combined flow of workingfluid 14 can be further cooled in a CHP cooler or in a recuperator by heating one of the other flows of workingfluid dioxide working fluid 14 is cooled below a critical temperature of 30° C., otherwise a cooled, dense gas is formed in thecondenser 26 to be supplied to the feed pump. -
FIG. 3 is a diagrammatical representation of a cycle of a recuperated wasteheat recovery system 70 in accordance with another embodiment of the present invention. The wasteheat recovery system 70 is similar to the wasteheat recovery system 10 as shown inFIG. 1 , except that the wasteheat recovery system 70 includes a second wasteheat recovery boiler 21. In this embodiment, thesecond loop cycle 44 includes the second wasteheat recovery boiler 21 that utilizes a flow of hot flue gases orfluids 19 to further heat thesecondary flow 32 of the workingfluid 14, after being heated first in thefirst recuperator 36, to a temperature equivalent to theprimary flow 30 of working fluid in the first wasteheat recovery boiler 16. The heating of thesecondary flow 32 of the workingfluid 14 in the second wasteheat recovery boiler 21 can lead to a thermodynamic advantage that allows for higher efficiency at lower peak temperature of the wasteheat recovery system 70. -
FIG. 11 is flow chart illustrating steps involved inmethod 100 of recovering waste heat for power generation using a working fluid in a Rankine cycle. Atstep 102, the method includes pumping a primary flow of the working fluid though at least one first waste heat recovery boiler for transferring heat from a stream of hot gases or flue gases to the working fluid. Atstep 104, the method includes expanding the heated primary flow of the working fluid through a first expander. Further, atstep 106, the method includes diverting a secondary flow of the working fluid from the primary flow through a second expander. Atstep 108, the method includes diverting a tertiary flow of the working fluid from the primary flow through a third expander. Finally, atstep 110, the method includes passing a combination of the primary flow of the working fluid, the secondary flow of the working fluid and the tertiary flow of the working fluid exiting the first expander, second expander and the third expander respectively through an auxiliary precooler and a condenser for condensing the combination of the working fluid and directing the condensed working fluid to a pump. - Advantageously, the present invention utilizes carbon dioxide as the working fluid which can be heated to very high temperatures, leading to high efficiency of the waste heat recovery system. Also, carbon dioxide is non-toxic and thermally stable working fluid. The present system and method using a triple expansion process using three expanders with cascaded recuperators extracts maximum power out of the available waste heat directed in the present system. Moreover, the heating of the secondary flow of the working fluid in the second waste heat recovery boiler can lead to a thermodynamic advantage that allows for higher efficiency at lower peak temperature of the waste heat recovery system.
- Furthermore, the skilled artisan will recognize the interchangeability of various features from different embodiments. Similarly, the various method steps and features described, as well as other known equivalents for each such methods and feature, can be mixed and matched by one of ordinary skill in this art to construct additional systems and techniques in accordance with principles of this disclosure. Of course, it is to be understood that not necessarily all such objects or advantages described above may be achieved in accordance with any particular embodiment. Thus, for example, those skilled in the art will recognize that the systems and techniques described herein may be embodied or carried out in a manner that achieves or optimizes one advantage or group of advantages as taught herein without necessarily achieving other objects or advantages as may be taught or suggested herein.
- While only certain features of the invention have been illustrated and described herein, many modifications and changes will occur to those skilled in the art. It is to be understood that the appended claims are intended to cover all such modifications and changes as fall within the true spirit of the invention.
Claims (23)
1. A waste heat recovery system comprising:
a Rankine cycle system for circulating a working fluid and comprising:
at least one first waste heat recovery boiler configured to transfer heat from a heat source to the working fluid;
a first expander configured to receive the heated working fluid from the at least one first waste heat recovery boiler; and
a second expander and a third expander coupled to at least one electric generator;
a condenser configured to receive the working fluid at low pressure from the first expander, the second expander and the third expander for cooling; and
a pump connected to the condenser for receiving a cooled and condensed flow of the working fluid from the condenser, wherein the pump is configured for pumping the condensed working fluid to a primary flow of the working fluid into the first waste heat recovery boiler, a secondary flow of the working fluid into the second expander and a tertiary flow of the working fluid into the third expander.
2. The waste heat recovery system of claim 1 , wherein the working fluid is carbon dioxide.
3. The waste heat recovery system of claim 1 , wherein the first waste heat recovery boiler comprises a heat exchanger section configured to transfer heat from a first stream of hot gases or a first flow of flue gases to the primary flow of the working fluid entering the first expander.
4. The waste heat recovery system of claim 1 , wherein the Rankine cycle system comprises a first recuperator configured to transfer heat from the primary flow of the working fluid exiting the first expander to the secondary flow of the working fluid prior to entering into the second expander.
5. The waste heat recovery system of claim 4 , wherein the first recuperator is an intermediate temperature recuperator.
6. The waste heat recovery system of claim 1 , wherein the Rankine cycle system comprises one second waste heat recovery boiler configured for heating the secondary flow of the working fluid exiting the first recuperator prior to entering the second expander.
7. The waste heat recovery system of claim 6 , wherein the one second waste heat recovery boiler comprises a heat exchanger section configured to transfer heat from a second stream of hot gases or a second flow of flue gases to the secondary flow of the working fluid exiting the first recuperator prior to entering the second expander.
8. The waste heat recovery system of claim 1 , wherein the Rankine cycle system comprises a second recuperator configured to transfer heat from a secondary flow of the working fluid exiting the second expander to the tertiary flow of the working fluid prior to entering into the third expander.
9. The waste heat recovery system of claim 5 , wherein the second recuperator is a low temperature recuperator.
10. The waste heat recovery system of claim 1 , wherein the Rankine cycle system comprises an auxiliary cooler for precooling a combined flow of the primary flow of working fluid, the secondary flow of working fluid and the tertiary flow of the working fluid after exiting from the first expander, the second expander and the third expander respectively prior to entering the condenser.
11. The waste heat recovery system of claim 1 , wherein the Rankine cycle system comprises a combined heat and power (CHP) system for providing heat for external processes from precooling a combined flow of primary flow of the working fluid, the secondary flow of working fluid and the tertiary flow of the working fluid exiting from the first expander, the second expander and the third expander respectively.
12. The waste heat recovery system of claim 11 , wherein the combined heat and power (CHP) system is configured to transfer heat attained from precooling to the primary flow of working fluid for preheating prior to entering the waste heat recovery boiler.
13. The waste heat recovery system of claim 1 , wherein the condenser cools the working fluid and the pump compresses a cooled gas rather than pumping a liquid.
14. A waste heat recovery system comprising:
a Rankine cycle system for circulating a working fluid and comprising:
at least one first waste heat recovery boiler configured to transfer heat from a stream of hot gases or flue gases to the working fluid;
a first expander configured to receive the heated working fluid from the at least one first waste heat recovery boiler; and
a second expander and a third expander coupled to at least one electric generator;
a condenser configured to receive the working fluid at low pressure from the first expander, the second expander and the third expander for cooling;
a pump connected to the condenser for receiving a cooled flow of the working fluid from the condenser, wherein the pump is configured for pumping the working fluid to a primary flow of the working fluid into the first waste heat recovery boiler, a secondary flow of the working fluid into the second expander via a first recuperator and a tertiary flow of the working fluid into the third expander via a second recuperator; and
at least one second waste heat recovery boiler configured for heating the secondary flow of the working fluid exiting the first recuperator prior to entering the second expander.
15. The waste heat recovery system of claim 14 , wherein the working fluid is carbon dioxide.
16. The waste heat recovery system of claim 14 , wherein the at least one first waste heat recovery boiler or the at least one second waste heat recovery boiler is configured to transfer heat from a stream of hot gases or flue gases to the primary flow of the working fluid entering the first expander or the secondary flow of the working fluid entering the second expander.
17. The waste heat recovery system of claim 14 , wherein the first recuperator is an intermediate temperature recuperator configured to transfer heat from the primary flow of the working fluid exiting the first expander to the secondary flow of the working fluid prior to entering into the second expander.
18. The waste heat recovery system of claim 14 , wherein the second recuperator is a low temperature recuperator configured to transfer heat from a secondary flow of the working fluid exiting the second expander to the tertiary flow of the working fluid prior to entering into the third expander.
19. The waste heat recovery system of claim 14 , wherein the Rankine cycle system comprises an auxiliary cooler or a combined heat and power (CHP) system for precooling a combined flow of the primary flow of working fluid, the secondary flow of working fluid and the tertiary flow of the working fluid after exiting from the first expander, the second expander and the third expander respectively prior to entering the condenser.
20. A method of recovering waste heat for power generation using a working fluid in a Rankine cycle, the method comprising:
pumping a primary flow of the working fluid though at least one first waste heat recovery boiler for transferring heat from a stream of hot gases or flue gases to the working fluid;
expanding the heated primary flow of the working fluid through a first expander;
diverting a secondary flow of the working fluid from the primary flow through a second expander;
diverting a tertiary flow of the working fluid from the primary flow through a third expander; and
passing a combination of the primary flow of the working fluid, the secondary flow of the working fluid and the tertiary flow of the working fluid exiting the first expander, second expander and the third expander respectively through an auxiliary precooler and a condenser for condensing the combination of the working fluid and further directing the working fluid to a pump.
21. The method of claim 20 , further comprising passing the secondary flow of the working fluid through a first intermediate temperature recuperator for preheating before delivering into the second expander.
22. The method of claim 20 , further comprising passing the secondary flow exiting the first recuperator into a second heat waste recovery boiler before delivering into the second expander.
23. The method of claim 21 , further comprising passing the tertiary flow of the working fluid through a second low temperature recuperator for preheating before delivering the tertiary flow of the working fluid into the third expander.
Priority Applications (11)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/538,323 US20140000261A1 (en) | 2012-06-29 | 2012-06-29 | Triple expansion waste heat recovery system and method |
CN201380034936.XA CN104487662A (en) | 2012-06-29 | 2013-06-10 | Triple expansion waste heat recovery system and method |
JP2015520237A JP2015525846A (en) | 2012-06-29 | 2013-06-10 | Triple expansion waste heat recovery system and method |
AU2013280987A AU2013280987A1 (en) | 2012-06-29 | 2013-06-10 | Triple expansion waste heat recovery system and method |
CA2876421A CA2876421A1 (en) | 2012-06-29 | 2013-06-10 | Triple expansion waste heat recovery system and method |
RU2014150481A RU2014150481A (en) | 2012-06-29 | 2013-06-10 | SYSTEM AND METHOD FOR RECOVERY OF EXHAUSTED HEAT WITH TRIPLE EXTENSION |
MX2014015418A MX2014015418A (en) | 2012-06-29 | 2013-06-10 | Triple expansion waste heat recovery system and method. |
BR112014031681A BR112014031681A2 (en) | 2012-06-29 | 2013-06-10 | "heat recovery system and method" |
PCT/US2013/044923 WO2014004061A2 (en) | 2012-06-29 | 2013-06-10 | Triple expansion waste heat recovery system and method |
EP13731204.7A EP2882942A2 (en) | 2012-06-29 | 2013-06-10 | Triple expansion waste heat recovery system and method |
KR20157001713A KR20150036155A (en) | 2012-06-29 | 2013-06-10 | Triple expansion waste heat recovery system and method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/538,323 US20140000261A1 (en) | 2012-06-29 | 2012-06-29 | Triple expansion waste heat recovery system and method |
Publications (1)
Publication Number | Publication Date |
---|---|
US20140000261A1 true US20140000261A1 (en) | 2014-01-02 |
Family
ID=48692656
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/538,323 Abandoned US20140000261A1 (en) | 2012-06-29 | 2012-06-29 | Triple expansion waste heat recovery system and method |
Country Status (11)
Country | Link |
---|---|
US (1) | US20140000261A1 (en) |
EP (1) | EP2882942A2 (en) |
JP (1) | JP2015525846A (en) |
KR (1) | KR20150036155A (en) |
CN (1) | CN104487662A (en) |
AU (1) | AU2013280987A1 (en) |
BR (1) | BR112014031681A2 (en) |
CA (1) | CA2876421A1 (en) |
MX (1) | MX2014015418A (en) |
RU (1) | RU2014150481A (en) |
WO (1) | WO2014004061A2 (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20130205776A1 (en) * | 2010-08-26 | 2013-08-15 | Modine Manufacturing Company | Waste heat recovery system and method of operating the same |
US20140009887A1 (en) * | 2011-03-25 | 2014-01-09 | 3M Innovative Properties Company | Fluorinated oxiranes as heat transfer fluids |
GB2542796A (en) * | 2015-09-29 | 2017-04-05 | Highview Entpr Ltd | Improvements in heat recovery |
WO2017219052A1 (en) * | 2016-06-20 | 2017-12-28 | CZADUL, Julia | Assembly for converting thermal energy into kinetic or electric energy |
US20180142581A1 (en) * | 2016-11-24 | 2018-05-24 | Doosan Heavy Industries & Construction Co., Ltd | Supercritical co2 generation system for parallel recuperative type |
US20180156075A1 (en) * | 2016-12-06 | 2018-06-07 | Doosan Heavy Industries & Construction Co., Ltd | Supercritical co2 generation system for series recuperative type |
US20180202324A1 (en) * | 2017-01-16 | 2018-07-19 | Doosan Heavy Industries & Construction Co., Ltd | Complex supercritical co2 generation system |
JP2018519454A (en) * | 2015-05-04 | 2018-07-19 | ドゥサン ヘヴィー インダストリーズ アンド コンストラクション カンパニー リミテッド | Supercritical carbon dioxide power generation system |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101650433B1 (en) * | 2015-05-18 | 2016-08-23 | 한국에너지기술연구원 | Vehicle waste heat recovery system |
CN106437886B (en) * | 2016-09-06 | 2018-12-28 | 镇江新宇固体废物处置有限公司 | A kind of afterheat generating system |
CN106640242B (en) * | 2016-09-19 | 2018-02-09 | 清华大学 | Hypersonic aircraft heat of engine reclaims electricity generation system and its control method |
KR102061275B1 (en) * | 2016-10-04 | 2019-12-31 | 두산중공업 주식회사 | Hybrid type supercritical CO2 power generation system |
CN106523055A (en) * | 2016-12-30 | 2017-03-22 | 翁志远 | Environment-friendly and energy-saving power generation system and process and power generating station |
EP3399246A1 (en) * | 2017-05-02 | 2018-11-07 | E.ON Sverige AB | District energy distributing system and method of providing mechanical work and heating heat transfer fluid of a district thermal energy circuit |
CN111051654A (en) * | 2017-05-17 | 2020-04-21 | 康明斯公司 | Waste heat recovery system with heat exchanger |
CA3085850A1 (en) * | 2017-12-18 | 2019-06-27 | Exergy International S.R.L. | Process, plant and thermodynamic cycle for production of power from variable temperature heat sources |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3365888A (en) * | 1963-02-21 | 1968-01-30 | Scanprocess As | Power plants |
US4765143A (en) * | 1987-02-04 | 1988-08-23 | Cbi Research Corporation | Power plant using CO2 as a working fluid |
US6167706B1 (en) * | 1996-01-31 | 2001-01-02 | Ormat Industries Ltd. | Externally fired combined cycle gas turbine |
US6694740B2 (en) * | 1997-04-02 | 2004-02-24 | Electric Power Research Institute, Inc. | Method and system for a thermodynamic process for producing usable energy |
US6857268B2 (en) * | 2002-07-22 | 2005-02-22 | Wow Energy, Inc. | Cascading closed loop cycle (CCLC) |
US20100319346A1 (en) * | 2009-06-23 | 2010-12-23 | General Electric Company | System for recovering waste heat |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB9810587D0 (en) * | 1998-05-15 | 1998-07-15 | Cryostar France Sa | Pump |
KR20050056941A (en) * | 2002-07-22 | 2005-06-16 | 다니엘 에이치. 스팅어 | Cascading closed loop cycle power generation |
JP5681711B2 (en) * | 2009-06-22 | 2015-03-11 | エコージェン パワー システムズ インコーポレイテッドEchogen Power Systems Inc. | Heat effluent treatment method and apparatus in one or more industrial processes |
WO2012047940A1 (en) * | 2010-10-04 | 2012-04-12 | Nabil Abujbara | Personal nutrition and wellness advisor |
WO2012074940A2 (en) * | 2010-11-29 | 2012-06-07 | Echogen Power Systems, Inc. | Heat engines with cascade cycles |
-
2012
- 2012-06-29 US US13/538,323 patent/US20140000261A1/en not_active Abandoned
-
2013
- 2013-06-10 AU AU2013280987A patent/AU2013280987A1/en not_active Abandoned
- 2013-06-10 CN CN201380034936.XA patent/CN104487662A/en active Pending
- 2013-06-10 WO PCT/US2013/044923 patent/WO2014004061A2/en active Application Filing
- 2013-06-10 EP EP13731204.7A patent/EP2882942A2/en not_active Withdrawn
- 2013-06-10 BR BR112014031681A patent/BR112014031681A2/en not_active IP Right Cessation
- 2013-06-10 CA CA2876421A patent/CA2876421A1/en not_active Abandoned
- 2013-06-10 MX MX2014015418A patent/MX2014015418A/en unknown
- 2013-06-10 RU RU2014150481A patent/RU2014150481A/en not_active Application Discontinuation
- 2013-06-10 JP JP2015520237A patent/JP2015525846A/en active Pending
- 2013-06-10 KR KR20157001713A patent/KR20150036155A/en not_active Application Discontinuation
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3365888A (en) * | 1963-02-21 | 1968-01-30 | Scanprocess As | Power plants |
US4765143A (en) * | 1987-02-04 | 1988-08-23 | Cbi Research Corporation | Power plant using CO2 as a working fluid |
US6167706B1 (en) * | 1996-01-31 | 2001-01-02 | Ormat Industries Ltd. | Externally fired combined cycle gas turbine |
US6694740B2 (en) * | 1997-04-02 | 2004-02-24 | Electric Power Research Institute, Inc. | Method and system for a thermodynamic process for producing usable energy |
US6857268B2 (en) * | 2002-07-22 | 2005-02-22 | Wow Energy, Inc. | Cascading closed loop cycle (CCLC) |
US7096665B2 (en) * | 2002-07-22 | 2006-08-29 | Wow Energies, Inc. | Cascading closed loop cycle power generation |
US20100319346A1 (en) * | 2009-06-23 | 2010-12-23 | General Electric Company | System for recovering waste heat |
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9267414B2 (en) * | 2010-08-26 | 2016-02-23 | Modine Manufacturing Company | Waste heat recovery system and method of operating the same |
US20130205776A1 (en) * | 2010-08-26 | 2013-08-15 | Modine Manufacturing Company | Waste heat recovery system and method of operating the same |
US20140009887A1 (en) * | 2011-03-25 | 2014-01-09 | 3M Innovative Properties Company | Fluorinated oxiranes as heat transfer fluids |
JP2018519454A (en) * | 2015-05-04 | 2018-07-19 | ドゥサン ヘヴィー インダストリーズ アンド コンストラクション カンパニー リミテッド | Supercritical carbon dioxide power generation system |
EP3293373A4 (en) * | 2015-05-04 | 2019-01-23 | Doosan Heavy Industries & Construction Co., Ltd. | Supercritical carbon dioxide power generation system |
GB2542796A (en) * | 2015-09-29 | 2017-04-05 | Highview Entpr Ltd | Improvements in heat recovery |
US10662821B2 (en) | 2015-09-29 | 2020-05-26 | Highview Enterprises Limited | Heat recovery |
WO2017219052A1 (en) * | 2016-06-20 | 2017-12-28 | CZADUL, Julia | Assembly for converting thermal energy into kinetic or electric energy |
US20180142581A1 (en) * | 2016-11-24 | 2018-05-24 | Doosan Heavy Industries & Construction Co., Ltd | Supercritical co2 generation system for parallel recuperative type |
US10371015B2 (en) * | 2016-11-24 | 2019-08-06 | DOOSAN Heavy Industries Construction Co., LTD | Supercritical CO2 generation system for parallel recuperative type |
US20180156075A1 (en) * | 2016-12-06 | 2018-06-07 | Doosan Heavy Industries & Construction Co., Ltd | Supercritical co2 generation system for series recuperative type |
US10526925B2 (en) * | 2016-12-06 | 2020-01-07 | DOOSAN Heavy Industries Construction Co., LTD | Supercritical CO2 generation system for series recuperative type |
US20180202324A1 (en) * | 2017-01-16 | 2018-07-19 | Doosan Heavy Industries & Construction Co., Ltd | Complex supercritical co2 generation system |
US10309262B2 (en) * | 2017-01-16 | 2019-06-04 | DOOSAN Heavy Industries Construction Co., LTD | Complex supercritical CO2 generation system |
Also Published As
Publication number | Publication date |
---|---|
CN104487662A (en) | 2015-04-01 |
RU2014150481A (en) | 2016-08-20 |
AU2013280987A1 (en) | 2015-01-22 |
EP2882942A2 (en) | 2015-06-17 |
JP2015525846A (en) | 2015-09-07 |
CA2876421A1 (en) | 2014-01-03 |
WO2014004061A3 (en) | 2014-10-02 |
MX2014015418A (en) | 2015-04-09 |
KR20150036155A (en) | 2015-04-07 |
WO2014004061A2 (en) | 2014-01-03 |
BR112014031681A2 (en) | 2017-06-27 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US20140000261A1 (en) | Triple expansion waste heat recovery system and method | |
US8752382B2 (en) | Dual reheat rankine cycle system and method thereof | |
EP2510206B1 (en) | Compound closed-loop heat cycle system for recovering waste heat and method thereof | |
US8166761B2 (en) | Method and system for generating power from a heat source | |
US8667799B2 (en) | Cascaded power plant using low and medium temperature source fluid | |
RU2722286C2 (en) | Waste heat recovery system and method with a simple cycle | |
US9038391B2 (en) | System and method for recovery of waste heat from dual heat sources | |
US9784248B2 (en) | Cascaded power plant using low and medium temperature source fluid | |
US20100242429A1 (en) | Split flow regenerative power cycle | |
EP3167166A1 (en) | System and method for recovering waste heat energy | |
EP3004572B1 (en) | System and method of waste heat recovery |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: GENERAL ELECTRIC COMPANY, NEW YORK Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:FREUND, SEBASTIAN WALTER;REEL/FRAME:028952/0070 Effective date: 20120807 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |