Combined power generation apparatus

Patent metadata

Field	Value
Publication number	US-11149592-B2
Application number	US-201816620852-A
Country	US
Kind code	B2
Filing date	Jan 22, 2018
Priority date	Jun 9, 2017
Publication date	Oct 19, 2021
Grant date	Oct 19, 2021

Abstract

A composite power generating device of the present invention includes an engine (110), a first flow line (121), a turbocharger (130), a second flow line (122), a third flow line (123), a compressor (211), a first medium line (221), a medium turbine (212), a second medium line (222), a working medium cooler (213), a recuperator (215), a power generating unit (214), a cross-line (233), a first heat exchanger (251), a second heat exchanger (252), and a third heat exchanger (253).

First claim

The invention claimed is:

1. A composite power generating device, comprising:
an engine driven by combustion of fuel;
a first flow line connected to the engine;
a turbocharger connected to the first flow line, compressing scavenging air to the engine, and discharged exhaust gas from the engine;
a second flow line connecting the turbocharger with the engine so that the scavenging air compressed in the turbocharger is supplied to the engine;
a third flow line branched off from the first flow line so that the exhaust gas of the first flow line is discharged to an outside;
a compressor compressing a working medium;
a first medium line connected to the compressor;
a medium turbine connected to the first medium line, and driven by the working medium fed from the first medium line;
a second medium line connecting the medium turbine with the compressor;
a working medium cooler connected to the second medium line, and cooling the working medium discharged from the medium turbine;
a recuperator connected to the first medium line and the second medium line, and performing a heat exchange process between the first medium line and the second medium line;
a power generating unit installed in the medium turbine to generate power by power that is produced from the medium turbine;
a recuperator bypass line connected to an inlet side and an outlet side of the recuperator in the first medium line;
a cross-line connected in parallel with the recuperator bypass line to connect an inlet side and an outlet side of the recuperator bypass line;
a first heat exchanger connected to the recuperator bypass line and the second flow line to perform a heat exchange process between the working medium of the recuperator bypass line and the scavenging air of the second flow line;
a second heat exchanger connected to the cross-line and the third flow line to perform a heat exchange process between the working medium of the cross-line and the exhaust gas of the third flow line; and
a third heat exchanger connected to the third flow line and the first medium line to perform a heat exchange process between the exhaust gas of the third flow line and the working medium of the first medium line.

2. The composite power generating device of claim 1 ,
wherein the first heat exchanger is disposed on the recuperator bypass line in parallel with the recuperator,
wherein the second heat exchanger is disposed on the cross-line in parallel with the first heat exchanger, and
wherein the third heat exchanger is disposed between the recuperator and the medium turbine in series with the recuperator.

3. The composite power generating device of claim 1 , further comprising:
a first regulating valve installed at the third flow line to regulate an opening degree of the third flow line.

4. The composite power generating device of claim 3 , further comprising:
a fourth flow line branched off from the third flow line to discharge the exhaust gas of the third flow line to an outside; and
a second regulating valve installed at the fourth flow line to regulate an opening degree of the fourth flow line.

5. The composite power generating device of claim 1 , further comprising:
a scavenging-air cooler installed in the second flow line to cool the scavenging air of the second flow line.

6. The composite power generating device of claim 1 , further comprising:
a first flow distribution valve disposed on a portion at which the first medium line and the inlet side of the recuperator bypass line are connected, and controlling a flow rate of the working medium that flows to the recuperator and the recuperator bypass line; and
a second flow distribution valve disposed on a portion at which the recuperator bypass line and an inlet side of the cross-line are connected, and controlling the flow rate of the working medium that flows to the first heat exchanger and the second heat exchanger.

7. The composite power generating device of claim 1 , further comprising:
an inventory line connecting the first medium line with the second medium line;
an inventory tank replenishing the working medium to the second medium line via the inventory line; and
an inventory valve installed at either side of the inventory line.

8. The composite power generating device of claim 7 , wherein one side of the inventory line is connected between an outlet side of the compressor and the inlet side of the recuperator in the first medium line, and the other side of the inventory line is connected between the outlet side of the recuperator and an inlet side of the compressor in the second medium line.

9. The composite power generating device of claim 7 , comprising:
a vacuum pump connected to the second medium line to create a vacuum state in the second medium line;
a booster pump connected to the second medium line to inject the working medium into the second medium line; and
a storage tank connected to the booster pump to supply the working medium to the booster pump.

10. The composite power generating device of claim 9 , further comprising:
a replenishment line connecting the booster pump with the inventory tank to replenish the working medium to the inventory tank.

11. The composite power generating device of claim 9 , further comprising:
a cleaning blower installed to spray the working medium onto the second heat exchanger and the third heat exchanger to eliminate fouling; and
a cleaning line connected to the cleaning blower to supply the working medium to the cleaning blower.

12. The composite power generating device of claim 11 , wherein the cleaning line is connected to the cleaning blower and the storage tank.

13. The composite power generating device of claim 11 , wherein the cleaning line is connected to the cleaning blower and the inventory tank.

14. The composite power generating device of claim 9 , further comprising:
a fire extinguisher installed between the second heat exchanger and the third heat exchanger; and
a fire extinguishing line connected to the fire extinguisher to supply the working medium to the fire extinguisher.

15. The composite power generating device of claim 14 , wherein the fire extinguishing line is connected to the inventory tank or the storage tank.

16. The composite power generating device of claim 1 , further comprising:
a recirculation line disposed between the compressor and the recuperator, and connecting the first medium line with the second medium line to cause the working medium of the first medium line to flow to the second medium line; and
a recirculation valve installed at the recirculation line.

17. The composite power generating device of claim 1 , further comprising:
a turbine bypass line disposed between the recuperator and the medium turbine, and connecting the first medium line with the second medium line to cause the working medium of the first medium line to flow to the second medium line; and
a turbine bypass valve installed at the turbine bypass line.

Assignees

• Korea Electric Power Corp
• Hyun Dai Heavy Ind Co Ltd

Inventors

• Ryu Gwang Nyeon
• Ham Jin Ki
• Kim Beom Joo
• Lee Cheol Hee

Classifications

• F28G1/166

  from external surfaces of heat exchange conduits · CPC title

• F02C3/04

  having a turbine driving a compressor (power transmission arrangements F02C7/36; control of working fluid flow F02C9/16) · CPC title

• F02C7/141

  of working fluid · CPC title

• F01K15/04

  the vehicles being waterborne vessels · CPC title

• F02C6/12

  Turbochargers, i.e. plants for augmenting mechanical power output of internal-combustion piston engines by increase of charge pressure · CPC title