US 10,968,785 B2Granted

Waste heat recovery systems with heat exchangers

AssigneeCummins Inc.

InventorsJared C. Delahanty, Timothy C. Ernst, J. Steven Kolhouse, Brett A. Boas

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Abstract

A waste heat recovery system (100) is provided. At least one heat exchanger (104) is fluidically coupled to a waste heat source (102) and is configured for selectively recovering heat from the waste heat source (102) to heat a working fluid (108). An energy conversion device (112) is fluidically coupled to the at least one heat exchanger (104) and is configured to receive the working fluid (108) and to generate an energy for performing work or transferring the energy to another device using the heat recovered from the waste heat source (102). A condenser (122) is fluidically coupled to the energy conversion device (112) and configured to receive the working fluid (108) from the energy conversion device (112) and to condense the working fluid (108) into a liquid phase.

Claims18

Dependent claims

A waste heat recovery system (100) of a vehicle, comprising:

at least one heat exchanger (104) fluidically coupled to a waste heat source (102) associated with the vehicle and configured for selectively recovering heat from the waste heat source (102) to heat a working fluid (108);
at least one energy conversion device (112) fluidically coupled to the at least one heat exchanger (104) and configured to receive the working fluid (108) and to generate an energy for performing work or transferring the energy to another device using the heat recovered from the waste heat source (102);
a condenser (122) fluidically coupled to the at least one energy conversion device (112) and configured to receive the working fluid (108) from the at least one energy conversion device (112) and to condense the working fluid (108) into a liquid phase;
a recuperator (120) fluidically coupled to the at least one energy conversion device (112) and configured to receive the working fluid (108) from the at least one energy conversion device (112) and to communicate at least a portion of the working fluid (108) to the at least one heat exchanger (104);
and
an exhaust boiler (110) fluidically coupled to the at least one heat exchanger (104) and configured to receive the working fluid (108) from the at least one heat exchanger (104) and to evaporate the working fluid (108) and communicate the evaporated working fluid (108) to the at least one energy conversion device (112);
wherein the exhaust boiler includes a plurality of microtubes, and the condenser (122) is fluidically coupled to a sub-cooler (124) which is fluidically coupled to the recuperator (120).

4 more elements

A waste heat recovery system (200) of a vehicle, comprising:

an exhaust gas recirculation (EGR) superheater (202) and an EGR boiler (204), both being fluidically coupled together to a waste heat source (102) associated with the vehicle and configured for selectively recovering heat from the waste heat source (102) to heat a working fluid (108);
at least one energy conversion device (112) fluidically coupled to the EGR superheater (202) and the EGR boiler (204), and configured to receive the working fluid (108) and to generate an energy for performing work or transferring the energy to another device using the heat recovered from the waste heat source (102);
a condenser (122) fluidically coupled to the at least one energy conversion device (112) and configured to receive the working fluid (108) from the at least one energy conversion device (112) and to condense the working fluid (108) into a liquid phase and
an exhaust boiler (110) fluidically coupled to the EGR superheater (202) and the EGR boiler (204), the exhaust boiler (110) being configured to recover heat from an exhaust and includes a plurality of microtubes;
wherein at least one of the EGR superheater (202) and the EGR boiler (204) also includes a plurality of microtubes.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/614,659Filed 9 May 2018 · us provisional application
Priority: 17 May 2017
Published: US 2020/0191020 A118 Jun 2020
Granted: 6 Apr 2021
Term ends: Not estimatedThe source records don’t support an estimate.

Classification29 codes

F01K 23/065
Combustion heat from one cycle heating the fluid in another cycle: the combustion taking place in an internal combustion piston engine, e.g. a…
F01K 7/42
The engines being of extraction or non-condensing type; Use of steam for feed-water heating: use of desuperheaters for feed-water heating
F01K 23/10
Combustion heat from one cycle heating the fluid in another cycle: with exhaust fluid of one cycle heating the fluid in another cycle
F01M 1/02
Pressure lubrication: using lubricating pumps