# US 2014/0190162 A1 · Heat Recovery System for a Gas Turbine Engine

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 2014/0190162 A1
- Document ID: US20140190162A1
- Status: Published application
- Kind: A1
- Application number: 14/239,455
- Filed: 2011-04-07
- Published: 2014-07-10
- Earliest claimed: 2009-10-27
- Assignees: Flysteam, LLC
- Inventors: Eduardo E. Fonseca
- Web page: https://patentgrep.com/patent/US20140190162A1

## CPC

- F02B 47/08: the substances including exhaust gas
- B64D 13/08: the air being heated or cooled
- B64D 15/02: by ducted hot gas or liquid
- F01D 15/005: {Adaptations for refrigeration plants}
- F01K 23/10: with exhaust fluid of one cycle heating the fluid in another cycle (F01K17/025 takes precedence)
- F01K 25/08: using special vapours
- F02C 6/18: using the waste heat of gas-turbine plants outside the plants themselves, e.g. gas-turbine power heat plants (using waste heat as source of energy for refrigeration plants F25B27/02; using the waste heat of a gasturbine for steam generation or in a steam cycle see F01K23/10)
- F02C 7/16: characterised by cooling medium
- F05D 2220/32: in gas turbines
- F05D 2220/62: with energy recovery turbines
- F05D 2220/74: a gas turbine
- Y02T 10/12: Improving ICE efficiencies
- Y02T 50/50: On board measures aiming to increase energy efficiency
- Y02T 50/60: Efficient propulsion technologies, e.g. for aircraft
- F02B: INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL (gas-turbine plants F02C; hot-gas or combustion-product positive-displacement engine plants F02G)
- B64D: EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- F01D: NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES (machines or engines for liquids F03; non-positive displacement pumps F04D)
- F01K: STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES (gas-turbine or jet-propulsion plants F02; nuclear power plants, engine arrangements therein G21D)
- F02C: GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS (construction of turbines F01D; jet-propulsion plants F02K; construction of compressors or fans F04; generating combustion products of high pressure or high velocity F23R; using gas turbines in compression refrigeration plants F25B11/00)
- F05D: INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## Abstract

A heat recovery system for an engine having an exhaust nozzle whereby exhaust gas is expelled, the heat recovery system comprising a heat exchanger disposed within the exhaust nozzle, heat exchanger containing a fluid, heat exchanger is further positioned to utilize heat energy from exhaust gas to vaporize fluid a turboexpander fluidly connected to heat exchanger and located downstream from heat exchanger, turboexpander further operatively connected to a utility a condenser fluidly connected to turboexpander and located downstream of turboexpander, and a pump fluidly connected to condenser and located between condenser and heat exchanger, pump is configured to direct fluid from condenser to heat exchanger; whereby operation of engine will generate heat energy in exhaust nozzle, vaporize fluid, and create a pressurized vapor which will drive turboexpander.

## Claims

### Claim 1

A heat recovery system for an engine having an exhaust nozzle whereby exhaust gas is expelled, the heat recovery system comprising:
a heat exchanger disposed within said exhaust nozzle, said heat exchanger containing a fluid, said heat exchanger is further positioned to utilize heat energy from said exhaust gas to vaporize said fluid;
a turboexpander fluidly connected to said heat exchanger and located downstream from said heat exchanger; said turboexpander further operatively connected to a utility;
a condenser fluidly connected to said turboexpander and located downstream of said turboexpander; and
a pump fluidly connected to said condenser and located between said condenser and said heat exchanger, said pump configured to direct fluid from the condenser to the heat exchanger; whereby operation of said engine will generate heat energy in said exhaust nozzle, vaporize said fluid, and create a pressurized vapor which will drive said turboexpander.

### Claim 2 (depends on 1)

The heat recovery system of claim 1 wherein said engine further comprises a centerbody and said heat exchanger is at least one coil, wherein said coil is disposed within said centerbody.

### Claim 3 (depends on 1)

The heat recovery system of claim 1 wherein said exhaust nozzle further comprises an inner skin and an outer skin and said heat exchanger is disposed between said inner skin and said outer skin.

### Claim 4 (depends on 3)

The heat recovery system of claim 3 wherein said heat exchanger further comprises a plurality of heat exchange jackets.

### Claim 5 (depends on 1)

The heat recovery system of claim 1 wherein said utility is a generator.

### Claim 6 (depends on 1)

The heat recovery system of claim 1 wherein said utility is a compressor.

### Claim 7 (depends on 1)

The heat recovery system of claim 1 wherein said utility is an engine shaft.

### Claim 8 (depends on 1)

The heat recovery system of claim 1 wherein said fluid is water.

### Claim 9

A method of recovering heat in an engine having an exhaust nozzle whereby exhaust gas is expelled and having a heat recovery system comprising: a heat exchanger disposed within said exhaust nozzle, said heat exchanger containing a fluid, said heat exchanger is further positioned to utilize heat energy from said exhaust gas to vaporize said fluid; a turboexpander fluidly connected to said heat exchanger and located downstream from said heat exchanger; said turboexpander further operatively connected to a utility; a condenser fluidly connected to said turboexpander and located downstream of said turboexpander; and a pump fluidly connected to said condenser and located between said condenser and said heat exchanger, said pump configured to direct fluid from the condenser to the heat exchanger; whereby operation of said engine will generate heat energy in said exhaust nozzle, vaporize said fluid, and create a pressurized vapor which will drive said turboexpander, said method comprising:
Utilizing said heat exchanger to capture said heat energy within said exhaust nozzle to convert said fluid into vapor;
Directing said vapor from said heat exchanger to a turboexpander;
Isentropically expanding said vapor within said turboexpander to power said utility;
Tranforming said vapor into a condensed fluid;
Pumping said condensed fluid back to said heat exchanger.

### Claim 11 (depends on 9)

The method of claim 9 wherein said engine further comprises a centerbody and said heat exchanger is at least one coil, wherein said coil is disposed within said centerbody.

### Claim 12 (depends on 9)

The method of claim 9 wherein said exhaust nozzle further comprises an inner surface and an outer surface and said heat exchanger is disposed between said inner surface and said outer surface.

### Claim 13 (depends on 9)

The method of claim 9 wherein said heat exchanger further comprises a plurality of jackets.

### Claim 14 (depends on 9)

The method of claim 9 wherein said utility is a generator.

### Claim 15 (depends on 9)

The method of claim 9 wherein said utility is a compressor.

### Claim 16 (depends on 9)

The method of claim 9 wherein said utility is an engine shaft.

### Claim 17 (depends on 9)

The method of claim 9 wherein said fluid is a refrigerant.