US 2019/0234343 A1 · ORGANIC RANKINE CYCLE WASTE HEAT RECOVERY SYSTEM HAVING TWO LOOPS

Abstract

An Organic Rankine Cycle (ORC) Waste Heat Recovery (WHR) System has an LT working fluid loop and an HT working fluid loop. The working fluid loops may each have a pump, one or more heat exchanger boilers, an expander, and a condenser. A recuperator is arranged within the LT working fluid loop between the pump and the first heat exchanger boiler. The recuperator is also arranged within the HT working fluid loop between the expander and the pump, or within the LT working fluid loop between the expander and the condenser. One of the heat exchanger boilers in the LT loop may be a charge air cooler heat exchanger, and may receive charge air mixed with recirculating exhaust gas. The LT loop may include more than one heat exchanger boiler, arranged in series or in parallel. Bypass valves may selectively bypass one or more of the heat exchangers.

Claims20

Dependent claims

A vehicle having an Organic Rankine Cycle (ORC) Waste Heat Recovery (WHR) System, comprising:

at least one low temperature (LT) working fluid loop having in order:
at least one LT working fluid pump,
at least one of:
an LT engine coolant to working fluid heat exchanger, and
an LT Charge Air Cooler (CAC) boiler;
at least one LT working fluid expander, and
at least one LT working fluid condenser;
and
at least one high temperature (HT) working fluid loop having in order:
at least one HT working fluid pump,
at least one HT exhaust to working fluid heat exchanger, and
at least one HT working fluid expander, and;
at least one recuperator having a first conduit being arranged within the at least one LT working fluid loop between the LT working fluid pump and the at least one of LT engine coolant to working fluid heat exchanger and LT CAC boiler;
the at least one recuperator having a second conduit being arranged within at least one of:
the at least one HT working fluid loop between the at least one HT working fluid expander and the at least one HT working fluid pump;
and
the at least one LT working fluid loop between the at least one LT working fluid expander and the at least one LT working fluid condenser.

14 more elements

An Organic Rankine Cycle (ORC) Waste Heat Recovery (WHR) System of a vehicle, comprising:

at least one low temperature (LT) working fluid loop having in order:
at least one LT working fluid pump,
at least one of:
an LT engine coolant to working fluid heat exchanger, and
an LT Charge Air Cooler (CAC) boiler;
at least one LT working fluid expander, and
at least one LT working fluid condenser;
and
at least one high temperature (HT) working fluid loop having in order:
at least one HT working fluid pump,
at least one HT exhaust to working fluid heat exchanger, and
at least one HT working fluid expander, and;
at least one recuperator having a first conduit being arranged within the at least one LT working fluid loop between the LT working fluid pump and the at least one of LT engine coolant to working fluid heat exchanger and LT CAC boiler;
the at least one recuperator having a second conduit being arranged within at least one of:
the at least one HT working fluid loop between the at least one HT working fluid expander and the at least one HT working fluid pump;
and
the at least one LT working fluid loop between the at least one LT working fluid expander and the at least one LT working fluid condenser.

14 more elements

A method of recovering energy from waste heat generated by a vehicle, comprising the steps of:

providing at least one low temperature (LT) ORC WHR working fluid loop having in order:
at least one LT working fluid pump,
at least one of:
an LT engine coolant to working fluid heat exchanger, and
an LT Charge Air Cooler (CAC) boiler;
at least one LT working fluid expander, and
at least one LT working fluid condenser;
and
providing at least one high temperature (HT) ORC WHR working fluid loop having in order:
at least one HT working fluid pump,
at least one HT exhaust to working fluid heat exchanger, and
at least one HT working fluid expander, and;
arranging a first conduit of at least one recuperator within the at least one LT ORC WHR working fluid loop between the LT working fluid pump and the at least one of LT engine coolant to working fluid heat exchanger and LT CAC boiler;
arranging a second conduit of the at least one recuperator within at least one of:
the at least one HT working fluid loop between the at least one HT working fluid expander and the at least one HT working fluid pump;
and
the at least one LT working fluid loop between the at least one LT working fluid expander and the at least one LT working fluid condenser.

14 more elements

Dependencies are inferred from the claim text.

Organic rankine cycle waste heat recovery system having two loops

Life of this patent

Organic rankine cycle waste heat recovery system having two loops

Life of this patent

Abstract

Claims20