Title: System and method for recovering waste heat

Abstract

A power generation system having a combustion engine with a Rankine bottoming cycle, the system including a first flow path for a process fluid and a second flow path for a working fluid, and a heat exchanger arranged along both the first and the second flow paths to transfer waste heat from the process fluid to the working fluid. The heat exchanger includes a first flow conduit being bounded by a first wall section and configured to convey the process fluid, a second flow conduit to convey the working fluid, the second flow conduit being bounded by a second wall section spaced apart from the first wall section to define a gap therebetween, and a thermally conductive structure arranged within the gap and joined to the first and second wall sections to transfer heat therebetween, the gap being fluidly isolated from both the process fluid and the working fluid.

Inventors:

Hughes, Gregory Gerald; Reinke, Michael J.; Rousseau, Tony; Ernst, Timothy C.; Zigan, James A.; Nelson, Christopher

Issue Date:

Tue May 26 00:00:00 EDT 2020

Research Org.:

Modine Manufacturing Co., Racine, WI (United States); Cummins Inc., Columbus, IN (United States)

Sponsoring Org.:

USDOE

OSTI Identifier:

1650945

Patent Number(s):

10662823

Application Number:

14/430,796

Assignee:

Modine Manufacturing Company (Racine, WI); Cummins Inc. (Columbus, IN)

Patent Classifications (CPCs):

F - MECHANICAL ENGINEERING F01 - MACHINES OR ENGINES IN GENERAL F01K - STEAM ENGINE PLANTS

F - MECHANICAL ENGINEERING F28 - HEAT EXCHANGE IN GENERAL F28D - HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT

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F - MECHANICAL ENGINEERING F01 - MACHINES OR ENGINES IN GENERAL F01K - STEAM ENGINE PLANTS

F01K23/10 - with exhaust fluid of one cycle heating the fluid in another cycle
F01K7/16 - the engines being only of turbine type

F - MECHANICAL ENGINEERING F28 - HEAT EXCHANGE IN GENERAL F28D - HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT

F28D1/0426 - {with units having particular arrangement relative to the large body of fluid, e.g. with interleaved units or with adjacent heat exchange units in common air flow or with units extending at an angle to each other or with units arranged around a central element}
F28D15/00 - Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls {
F28D21/0003 - {the heat being recuperated from exhaust gases
F28D7/0025 - {the conduits for one medium or the conduits for both media being flat tubes or arrays of tubes}
F28D9/00 - Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall {

F - MECHANICAL ENGINEERING F28 - HEAT EXCHANGE IN GENERAL F28F - DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION

F28F2265/26 - for allowing differential expansion between elements
F28F3/005 - {Arrangements for preventing direct contact between different heat-exchange media
F28F3/02 - Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
F28F3/027 - {with openings, e.g. louvered corrugated fins
F28F9/001 - {Casings in the form of plate-like arrangements
F28F9/0246 - {Arrangements for connecting header boxes with flow lines}

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DOE Contract Number:  

EE0003403

Resource Type:

Patent

Resource Relation:

Patent File Date: 09/24/2013

Country of Publication:

United States

Language:

English

Subject:

42 ENGINEERING; 30 DIRECT ENERGY CONVERSION