# US 10,480,778 B2 · Inductive heating energy recovery system

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- Number: US 10,480,778 B2
- Document ID: US10480778B2
- Status: Granted
- Kind: B2
- Application number: 14/517,247
- Filed: 2014-10-17
- Published: 2016-04-21
- Granted: 2019-11-19
- Earliest claimed: 2014-10-17
- Assignees: Goodrich Corporation
- Applicants: Goodrich Corporation
- Inventors: Timothy Centa
- Web page: https://patentgrep.com/patent/US10480778B2

## CPC

- F22B 1/281: {other than by electrical resistances or electrodes}
- B23K 26/322: involving coated metal parts (using absorbing layers on the workpiece B23K26/18)
- H05B 6/108: {for heating a fluid}
- H05B 6/42: Cooling of coils
- B23K 26/361: for deburring or mechanical trimming (B23K26/351 takes precedence)
- B23K 26/362: Laser etching
- H05B 2214/03: Heating of hydrocarbons
- F22B: METHODS OF STEAM GENERATION; STEAM BOILERS
- B23K: SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- H05B: ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL

## Abstract

An energy recovery system is provided. The energy recovery system may comprise an inductive heating coil configured to have a cooling fluid flow through the inductive heating coil and a heat exchanger fluidly coupled to the inductive heating coil and configured to produce a steam source. The steam source drives a pump.

## Claims

### Claim 1

An energy recovery system of an inductive heating system, comprising:
a vacuum vessel;
an inductive heating coil wound around the vessel and configured to have a cooling fluid flow through the inductive heating coil;
a boiler including a heat exchanger fluidly coupled to the inductive heating coil and configured to produce a steam source;
a vacuum pump driven by the steam source and configured to draw a vacuum in the vacuum vessel; and
an oil pump driven by the steam source and fluidly coupled to an inlet of the inductive heating coil and in fluid communication with the heat exchanger.

### Claim 2 (depends on 1)

The energy recovery system of claim 1, wherein the cooling fluid comprises a liquid-phase heat transfer fluid.

### Claim 3 (depends on 2)

The energy recovery system of claim 2, wherein the oil pump is a steam turbine pump driven by the steam source.

### Claim 4 (depends on 3)

The energy recovery system of claim 3, wherein the inductive heating coil comprises copper tubing.

### Claim 5 (depends on 4)

The energy recovery system of claim 4, further comprising a steam header to contain the steam source, wherein the steam header is in fluid communication with the boiler.

### Claim 6 (depends on 5)

The energy recovery system of claim 5, further comprising a variable frequency drive pump fluidly coupled to the inductive heating coil.

### Claim 7 (depends on 6)

The energy recovery system of claim 6, further comprising a ceramic insulating material in contact with the inductive heating coil.

### Claim 8 (depends on 7)

The energy recovery system of claim 7, further comprising a fluid storage tank in fluid communication with the heat exchanger configured to store the cooling fluid.

### Claim 9 (depends on 1)

The energy recovery system of claim 1, further comprising:
an insulating material proximate the conductive coil;
a susceptor proximate the insulating material;
a heat transfer oil in the conductive coil;
said heat exchanger configured to cool the heat transfer oil and produce said steam source.

### Claim 10 (depends on 9)

The energy recovery system of claim 9, wherein the heat exchanger uses water retained by the boiler to cool the heat transfer oil to produce steam within the boiler.

### Claim 11 (depends on 10)

The energy recovery system of claim 10, further comprising a variable frequency drive pump configured to move the heat transfer oil into the conductive coil.

### Claim 12 (depends on 11)

The energy recovery system of claim 11, wherein the oil pump is a steam turbine pump configured to move the heat transfer oil into the conductive coil, wherein the vacuum pump comprises a vacuum ejector configured to receive steam from the steam header and in response draw the vacuum in the vacuum vessel.