Multi-pressure radial turbine system

Patent metadata

Field	Value
Publication number	US-9500205-B2
Application number	US-201214002468-A
Country	US
Kind code	B2
Filing date	Jul 5, 2012
Priority date	Jul 20, 2011
Publication date	Nov 22, 2016
Grant date	Nov 22, 2016

Abstract

A multi-pressure radial turbine system including a high-pressure pump and a low-pressure pump for pressurizing liquid-phase heating media introduced therein to different pressures; a high-pressure evaporator and a low-pressure evaporator for vaporizing the liquid-phase heating media delivered from the high-pressure pump and the low-pressure pump by absorbing heat from a high-temperature heat source; one multi-pressure radial turbine that expands the gaseous heating media having different pressures and temperatures, supplied from the high-pressure evaporator and the low-pressure evaporator, to obtain output power; and a condenser for condensing the gaseous heating medium expanded in the multi-pressure radial turbine by making the medium release heat to a low-pressure heat source. A cycle circuit is formed through which the heating medium circulates while repeatedly changing its state between vapor and liquid.

First claim

The invention claimed is:

1. A multi-pressure radial turbine system comprising:
a closed circuit including:
a plurality of pumps for pressurizing heating media introduced therein to different pressures;
a plurality of evaporators for vaporizing the heating media delivered from the pumps by absorbing heat from a first heat source;
a multi-pressure radial turbine that expands the heating media having different pressures and temperatures, supplied from the evaporators, to obtain output power; and
a condenser for condensing the heating medium expanded in the multi-pressure radial turbine by making the medium release heat to a second heat source having a lower temperature than the first heat source,
wherein the closed circuit is a cycle circuit through which the heating medium circulates while repeatedly changing its state between vapor and liquid, and
wherein the multi-pressure radial turbine includes a turbine wheel that rotates in a casing, the turbine wheel having a plurality of turbine wheel inlets from which the heating media are introduced at different pressures and one turbine wheel outlet from which the expanded heating medium is discharged in an axial direction.

2. The multi-pressure radial turbine system according to claim 1 , wherein a flow path of the first heat source connects the plurality of evaporators in series, making the first heat source flow from a high-pressure side to a low-pressure side of the heating media delivered from the pumps.

3. The multi-pressure radial turbine system according to claim 1 , wherein the turbine wheel inlets are arranged such that a plurality of heating-medium introduction pressures are gradually lowered toward the turbine wheel outlet.

4. The multi-pressure radial turbine system according to claim 1 , wherein the turbine wheel inlets are arranged such that a plurality of heating-medium introduction pressures are gradually increased toward the turbine wheel outlet.

5. The multi-pressure radial turbine system according to claim 1 , wherein the multi-pressure radial turbine drives a generator to generate power.

6. A multi-pressure radial turbine system comprising:
a plurality of pumps for pressurizing heating media introduced therein to different pressures;
a plurality of evaporators for vaporizing the heating media delivered from the pumps by absorbing heat from a first heat source;
a multi-pressure radial turbine that expands the heating media having different pressures and temperatures, supplied from the evaporators, to obtain output power; and
a condenser for condensing the heating medium expanded in the multi-pressure radial turbine by making the medium release heat to a second heat source having a lower temperature than the first heat source,
wherein a cycle circuit through which the heating medium circulates while repeatedly changing its state between vapor and liquid is formed, and
wherein the multi-pressure radial turbine includes a turbine wheel that rotates in a casing, the turbine wheel having a plurality of turbine wheel inlets from which the heating media are introduced at different pressures and a turbine wheel outlet from which the expanded heating medium is discharged in an axial direction, and
the turbine wheel expands the heating medium having different pressures introduced from the plurality of the turbine wheel inlets and discharges the expanded heating medium from the turbine wheel outlet.

7. The multi-pressure radial turbine system according to claim 1 , wherein the heating medium is an organic medium.

8. A binary cycle generator system including the multi-pressure radial turbine system according to claim 1 , wherein geothermal heat is used as the first heat source.

9. A power recovery system including; a plant; and
the multi-pressure radial turbine system according to claim 1 , wherein exhaust energy discharged from the plant is used as the first heat source.

10. An exhaust-heat recovery system including; a power source; and
the multi-pressure radial turbine system according to claim 1 , wherein exhaust energy discharged from the power source is used as the first heat source.

11. A pump provided in a closed circuit having a plurality of evaporators for vaporizing a liquid-phase heating media by absorbing heat from a first heat source; a multi-pressure radial turbine for expanding the heating media having different pressures and temperatures, supplied from the evaporators, to obtain output power; and a condenser for condensing the heating medium expanded in the multi-pressure radial turbine by making the medium release heat to a second heat source having a lower temperature than the first heat source are provided, the pump being arranged between the condenser and the plurality of evaporators and pressurizing the heating media from the condenser to different pressures,
wherein the closed circuit is a cycle circuit through which the heating medium circulates while repeatedly changing its state between vapor and liquid, and
wherein the multi-pressure radial turbine includes a turbine wheel that rotates in a casing, the turbine wheel having a plurality of turbine wheel inlets from which the heating media are introduced at different pressures and one turbine wheel outlet from which the expanded heating medium is discharged in an axial direction.

12. An evaporator provided in a closed circuit having a multi-pressure radial turbine for expanding heating media having different pressures and temperatures to obtain output power, a condenser for condensing the heating medium expanded in the multi-pressure radial turbine by making the medium release heat to a first heat source, a plurality of pumps for pressurizing the heating media from the condenser to different pressures, the evaporator vaporizing the heating media delivered from one of the pumps by absorbing heat from a second heat source having a higher temperature than the first heat source,
wherein the closed circuit is a cycle circuit through which the heating medium circulates while repeatedly changing its state between vapor and liquid, and
wherein the multi-pressure radial turbine includes a turbine wheel that rotates in a casing, the turbine wheel having a plurality of turbine wheel inlets from which the heating media arc introduced at different pressures and one turbine wheel outlet from which the expanded heating medium is discharged in an axial direction.

13. A multi-pressure radial turbine provided in a closed circuit having a condenser for condensing heating medium by making the medium release heat to a first heat source; a plurality of pumps for pressurizing the heating media from the condenser to different pressures; a plurality of evaporators for vaporizing the heating media delivered from the pumps by absorbing heat from a second heat source having a higher temperature than the first heat source, the multi-pressure radial turbine expanding the heating media having different pressures and temperatures, supplied from the evaporators, to obtain output power,
wherein the closed circuit is a cycle circuit through which the heating medium circulates while repeatedly changing its state between vapor and liquid, and
wherein the multi-pressure radial turbine includes a turbine wheel that rotates in a casing, the turbine wheel having a plurality of turbine wheel inlets from which the heating media are introduced at different pressures and one turbine wheel outlet from which the expanded heating medium is discharged in an axial direction.

14. A power generation method comprising:
pressurizing heating media to different pressures;
vaporizing the heating media absorbing heat from a first heat source;
expandi

Assignees

• Higashimori Hirotaka
• Fukuda Norihiro
• Kawami Masayuki
• Mitsubishi Heavy Ind Ltd

Inventors

• Higashimori Hirotaka
• Fukuda Norihiro
• Kawami Masayuki

Classifications

• F22B33/14

  Combinations of low- and high-pressure boilers {(combination of low- and high-pressure locomotive boilers of fire-box type F22B13/065)} · CPC title

• F01K7/18 Primary

  the turbine being of multiple-inlet-pressure type · CPC title

• F01K25/08

  using special vapours · CPC title

• F04D29/58 Primary

  Cooling (of machines or engines in general F01P); Heating; Diminishing heat transfer {(for the motor of air-pump units F04D25/082; cooling of shafts or bearings F04D29/04)} · CPC title

• F01D9/026

  Scrolls for radial machines or engines · CPC title