Gas/liquid two-phase flow state controlling device and gas/liquid two-phase flow state controlling method

Patent metadata

Field	Value
Publication number	US-9367068-B2
Application number	US-201214348367-A
Country	US
Kind code	B2
Filing date	Jul 31, 2012
Priority date	Sep 29, 2011
Publication date	Jun 14, 2016
Grant date	Jun 14, 2016

Abstract

A flow state controlling device controls, to a specified flow state, fluid of a gas/liquid two-phase flow that flows through a flow path. The flow state controlling device includes a pressure acquiring portion that acquires pressure information relating to pressure of the fluid, a mass velocity acquiring portion that acquires mass velocity information relating to a mass velocity of the fluid, a dryness fraction acquiring portion that acquires dryness fraction information relating to the dryness fraction of the fluid, and a controlling portion that controls, based on the pressure information, the mass velocity information and the dryness fraction information, a pressure controlling device that is able to change a pressure of the fluid, a mass velocity controlling device that is able to change a mass velocity of the fluid, and a heat controlling device that is able to change the latent heat of the fluid.

First claim

The invention claimed is:

1. A flow state controlling device for controlling, to a specified flow state, fluid of a gas/liquid two-phase flow that flows through a flow path, the flow state controlling device comprising:
a pressure acquiring portion that acquires pressure information relating to pressure of the fluid;
a mass velocity acquiring portion that acquires mass velocity information relating to a mass velocity of the fluid;
a dryness fraction acquiring portion that acquires dryness fraction information relating to the dryness fraction of the fluid; and
a controlling portion that controls, based on the pressure information, the mass velocity information, and the dryness fraction information, a pressure controlling device that is able to change a pressure of the fluid, a mass velocity controlling device that is able to change a mass velocity of the fluid, and a heat controlling device that is able to change the latent heat of the fluid.

2. The flow state controlling device as set forth in claim 1 , wherein:
the controlling portion includes:
a flow state detecting portion that detects a flow state of the fluid at the current point in time based on the pressure information, the mass velocity information, and the dryness fraction information; and
a drive controlling portion that drives the pressure controlling device, the mass velocity controlling device, and/or the heat controlling device based on the flow state at the current point in time and on the specified flow state.

3. The flow state controlling device as set forth in claim 2 , wherein:
the drive controlling portion performs control so as to change the mass velocity of the fluid without changing the pressure or the dryness fraction of the fluid.

4. The flow state controlling device as set forth in claim 2 , wherein:
the drive controlling portion performs control so as to change the dryness fraction of the fluid without changing the pressure or the mass velocity of the fluid.

5. The flow state controlling device as set forth in claim 3 , wherein:
the drive controlling portion performs control so as to change the dryness fraction of the fluid without changing the pressure or the mass velocity of the fluid.

6. The flow state controlling device as set forth in claim 2 , wherein:
the drive controlling portion performs control so as to change the pressure and the dryness fraction of the fluid without changing the mass velocity of the fluid.

7. The flow state controlling device as set forth in claim 3 , wherein:
the drive controlling portion performs control so as to change the pressure and the dryness fraction of the fluid without changing the mass velocity of the fluid.

8. The flow state controlling device as set forth in claim 4 , wherein:
the drive controlling portion performs control so as to change the pressure and the dryness fraction of the fluid without changing the mass velocity of the fluid.

9. The flow state controlling device as set forth in claim 5 , wherein:
the drive controlling portion performs control so as to change the pressure and the dryness fraction of the fluid without changing the mass velocity of the fluid.

10. The flow state controlling device as set forth in claim 2 , wherein:
the drive controlling portion performs control so as to change the mass velocity and the dryness fraction of the fluid without changing the pressure of the fluid.

11. A flow state controlling method using a flow state controlling device to control, to a specified flow state, fluid of a gas/liquid two-phase flow that flows through a flow path, the flow state controlling method comprising:
a pressure acquiring step wherein the flow state controlling device acquires pressure information relating to pressure of the fluid;
a mass velocity acquiring step wherein the flow state controlling device acquires mass velocity information relating to the mass velocity of the fluid;
a dryness fraction acquiring step wherein the flow state controlling device acquires dryness fraction information relating to the dryness fraction of the fluid; and
a controlling step wherein the flow state controlling device controls, based on the pressure information, the mass velocity information, and the dryness fraction information, a pressure controlling device that is able to change a pressure of the fluid, a mass velocity controlling device that is able to change a mass velocity of the fluid, and a heat controlling device that is able to change the latent heat of the fluid.

12. The flow state controlling method as set forth in claim 11 , wherein:
the controlling step includes:
a flow state detecting step wherein the flow state controlling device detects a flow state of the fluid at the current point in time based on the pressure information, the mass velocity information, and the dryness fraction information; and
a drive controlling step wherein the flow state controlling device drives the pressure controlling device, the mass velocity controlling device, and/or the heat controlling device based on the flow state at the current point in time and on the specified flow state.

13. The flow state controlling method as set forth in claim 12 , wherein:
the drive controlling step includes a step wherein the flow state controlling device performs control so as to change the mass velocity of the fluid without changing the pressure or the dryness fraction of the fluid.

14. The flow state controlling step as set forth in claim 12 , wherein:
the drive controlling step includes a step wherein the flow state controlling device performs control so as to change the dryness fraction of the fluid without changing the pressure or the mass velocity of the fluid.

15. The flow state controlling step as set forth in claim 13 , wherein:
the drive controlling step includes a step wherein the flow state controlling device performs control so as to change the dryness fraction of the fluid without changing the pressure or the mass velocity of the fluid.

16. The flow state controlling method as set forth claim 12 , wherein:
the drive controlling step includes a step wherein the flow state controlling device performs control so as to change the pressure and the dryness fraction of the fluid without changing the mass velocity of the fluid.

17. The flow state controlling method as set forth claim 13 , wherein:
the drive controlling step includes a step wherein the flow state controlling device performs control so as to change the pressure and the dryness fraction of the fluid without changing the mass velocity of the fluid.

18. The flow state controlling method as set forth claim 14 , wherein:
the drive controlling step includes a step wherein the flow state controlling device performs control so as to change the pressure and the dryness fraction of the fluid without changing the mass velocity of the fluid.

19. The flow state controlling method as set forth claim 15 , wherein:
the drive controlling step includes a step wherein the flow state controlling device performs control so as to change the pressure and the dryness fraction of the fluid without changing the mass velocity of the fluid.

20. The flow state controlling method as set forth in claim 12 , wherein:
the drive controlling step includes a step wherein the flow state controlling device performs control so as to change the mass velocity and the dryness fraction of the fluid without changing the pressure of the fluid.

Assignees

• Nishino Giichi
• Azbil Corp

Inventors

• Nishino Giichi

Classifications

• Y10T137/0368

  By speed of fluid · CPC title

• F22B35/00 Primary

  Control systems for steam boilers (for regulating feed-water supply F22D5/00; for controlling superheat temperature F22G5/00) · CPC title

• Y10T137/6416

  With heating or cooling of the system · CPC title

• G05D7/0629 Primary

  characterised by the type of regulator means · CPC title

• F22G5/20

  by combined controlling procedures · CPC title