OPTIMIZED SYSTEM FOR RECOVERING WASTE HEAT
First Claim
1. A waste heat recovery system including at least two integrated rankine cycle systems, the recovery system comprising:
- a heat generation system comprising at least two separate heat sources having different temperatures;
a first rankine cycle system comprising a first evaporator and a first expander, wherein the first rankine cycle system is coupled to a first heat source among the at least two separate heat sources and configured to circulate a first working fluid;
wherein the first rankine system is configured to remove heat from the first heat source;
a second rankine cycle system comprising a second evaporator and a second expander;
wherein the second rankine cycle system is coupled to at least one second heat source among the at least two separate heat sources and configured to circulate a second working fluid, the at least one second heat source comprising a lower temperature heat source than the first heat source, wherein the second rankine cycle system is configured to remove heat from the at least one second heat source;
a cascaded heat exchange unit, wherein the first and second working fluids are circulatable in heat exchange relationship through the cascaded heat exchange unit for condensation of the first working fluid in the first rankine cycle system and evaporation of the second working fluid in the second rankine cycle system; and
at least one bypass unit configured to divert at least a portion of the first working fluid to bypass the first evaporator, the first expander, the cascaded heat exchange unit, or combinations thereof;
at least a portion of the second working fluid to bypass the second expander, the cascaded heat exchange unit, or combinations thereof.
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Accused Products
Abstract
A waste heat recovery system includes at least two integrated rankine cycle systems coupled to at least two separate heat sources having different temperatures. The first rankine cycle system is coupled to a first heat source and configured to circulate a first working fluid. The second rankine cycle system is coupled to at least one second heat source and configured to circulate a second working fluid. The first and second working fluid are circulatable in heat exchange relationship through a cascading heat exchange unit for condensation of the first working fluid in the first rankine cycle system and evaporation of the second working fluid in the second rankine cycle system. At least one bypass unit is configured to divert at least a portion of the first working fluid to bypass the first evaporator, the first expander, the cascaded heat exchange unit, or combinations thereof; at least a portion of the second working fluid to bypass the second expander, the cascaded heat exchange unit, or combinations thereof.
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Citations
27 Claims
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1. A waste heat recovery system including at least two integrated rankine cycle systems, the recovery system comprising:
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a heat generation system comprising at least two separate heat sources having different temperatures; a first rankine cycle system comprising a first evaporator and a first expander, wherein the first rankine cycle system is coupled to a first heat source among the at least two separate heat sources and configured to circulate a first working fluid;
wherein the first rankine system is configured to remove heat from the first heat source;a second rankine cycle system comprising a second evaporator and a second expander;
wherein the second rankine cycle system is coupled to at least one second heat source among the at least two separate heat sources and configured to circulate a second working fluid, the at least one second heat source comprising a lower temperature heat source than the first heat source, wherein the second rankine cycle system is configured to remove heat from the at least one second heat source;a cascaded heat exchange unit, wherein the first and second working fluids are circulatable in heat exchange relationship through the cascaded heat exchange unit for condensation of the first working fluid in the first rankine cycle system and evaporation of the second working fluid in the second rankine cycle system; and at least one bypass unit configured to divert at least a portion of the first working fluid to bypass the first evaporator, the first expander, the cascaded heat exchange unit, or combinations thereof;
at least a portion of the second working fluid to bypass the second expander, the cascaded heat exchange unit, or combinations thereof. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A waste heat recovery system including at least two integrated organic rankine cycle systems, the recovery system comprising:
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a combustion engine comprising one heat source having an engine exhaust unit; and
at least one other heat source selected from a group comprising an oil heat exchanger, an engine jacket, a water jacket heat exchanger, a lower temperature intercooler, a higher temperature intercooler, or combinations thereof;a first organic rankine cycle system comprising a first evaporator and a first expander, wherein the first organic rankine cycle system is coupled to the engine exhaust unit and configured to circulate a first organic working fluid;
wherein the first organic rankine system is configured to remove heat from the engine exhaust unit;a second organic rankine cycle system comprising a second evaporator and a second expander;
wherein the second organic rankine cycle system is coupled to the at least one other heat source selected from the group comprising the oil heat exchanger, the engine jacket, the water jacket heat exchanger, the lower temperature intercooler, the higher temperature intercooler, or combinations thereof; and
configured to circulate a second organic working fluid, the one heat source comprising a higher temperature heat source than the at least one other heat source, wherein the second organic rankine cycle system is configured to remove heat from the at least one other heat source; anda cascaded heat exchange unit, wherein the first and second organic working fluids are circulatable in heat exchange relationship through the cascaded heat exchange unit for condensation of the first organic working fluid in the first organic rankine cycle system and evaporation of the second organic working fluid in the second organic rankine cycle system; at least one bypass unit configured to divert at least a portion of the first working fluid to bypass the first evaporator, the first expander, the cascaded heat exchange unit, or combinations thereof;
at least a portion of the second working fluid to bypass the second expander, the cascaded heat exchange unit, or combinations thereof. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A waste heat recovery system including at least two integrated rankine cycle systems, the recovery system comprising:
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a heat generation system comprising at least two separate heat sources having different temperatures; a first rankine cycle system comprising a first evaporator and a first expander, wherein the first rankine cycle system is coupled to a first heat source among the at least two separate heat sources and configured to circulate a first working fluid;
wherein the first rankine system is configured to remove heat from the first heat source;a second rankine cycle system comprising a second evaporator and a second expander;
wherein the second rankine cycle system is coupled to at least one second heat source among the at least two separate heat sources and configured to circulate a second working fluid, the at least one second heat source comprising a lower temperature heat source than the first heat source, wherein the second rankine cycle system is configured to remove heat from the at least one second heat source;a cascaded heat exchange unit, wherein the first and second working fluids are circulatable in heat exchange relationship through the cascaded heat exchange unit for condensation of the first working fluid in the first rankine cycle system and evaporation of the second working fluid in the second rankine cycle system;
wherein the second rankine cycle is configured to preheat and/or partially evaporate the second working fluid before entering the cascaded heat exchange unit andat least one bypass unit configured to divert at least a portion of the first working fluid to bypass the first evaporator, the first expander, the cascaded heat exchange unit, or combinations thereof;
at least a portion of the second working fluid to bypass the second expander, the cascaded heat exchange unit, or combinations thereof. - View Dependent Claims (23, 24, 25, 26, 27)
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Specification