Power generation apparatus

Patent metadata

Field	Value
Publication number	US-10519813-B2
Application number	US-201615555946-A
Country	US
Kind code	B2
Filing date	Feb 26, 2016
Priority date	Mar 6, 2015
Publication date	Dec 31, 2019
Grant date	Dec 31, 2019

Abstract

Disclosed are power generation apparatuses. An exemplary power generation apparatus (1) is configured such that water vapor generated in a steam generator (2) is supplied to a scroll expander (3) to drive the scroll expander, wherein: a condensation device (5) is arranged in a discharge path (12) downstream of the scroll expander, the condensation device being configured to mix water vapor having passed through the scroll expander directly with cooling water to condense the water vapor; and the condensation device includes a control unit (10) that performs a control of adjusting the amount of cooling water supply so as to obtain condensed water having a predetermined temperature.

First claim

The invention claimed is:

1. A power generation apparatus configured such that water vapor generated in a steam generator is supplied to an expander to drive the expander, the power generation apparatus comprising:
a condensation device coupled to a path downstream of the expander, the condensation device having a container body and being configured to, within the container body, mix water vapor having passed through the expander directly with cooling water to condense the water vapor, and
a control unit configured to adjust an amount of the cooling water supplied to the condensation device so as to obtain condensed water having a predetermined temperature;
an air release path including an air release valve connected to an upper portion of the condensation device;
wherein the control unit is configured to, at a time of start-up:
rotate a cooling water pump to charge the cooling water into the container body, thereby raising a liquid level within the container body; and
open the air release valve such that, in response to the rise of the liquid level within the container body, non-condensable gas accumulated within the container body is discharged out of the container body through the air release path.

2. The power generation apparatus according to claim 1 , wherein:
the condensation device comprises means for detecting a liquid level within the condensation device, and
the control unit is configured to control, based on the liquid level, a rotational frequency of a pump that is configured to send liquid out of the condensation device.

3. The power generation apparatus according to claim 1 , wherein:
a water vapor introduction pipe coupled to the path downstream of the expander extends into the condensation device, and
the introduction pipe has a plurality of perforations formed below a predetermined liquid level such that bubbling occurs in a liquid phase below the predetermined liquid level in the condensation device.

4. The power generation apparatus according to claim 3 , wherein an air release path including an air release valve is connected to an upper portion of the condensation device.

5. The power generation apparatus according to claim 2 , wherein:
a water vapor introduction pipe coupled to the path downstream of the expander extends into the condensation device, and
the introduction pipe has a plurality of perforations formed below a predetermined liquid level such that bubbling occurs in a liquid phase below the predetermined liquid level in the condensation device.

6. The power generation apparatus according to claim 5 , wherein an air release path including an air release valve is connected to an upper portion of the condensation device.

7. The power generation apparatus according to claim 2 , wherein an air release path including an air release valve is connected to an upper portion of the condensation device.

8. The power generation apparatus according to claim 1 , wherein the expander is a scroll expander.

9. A power generation apparatus configured to supply water vapor to an expander to drive the expander, the power generation apparatus comprising:
a condensation device coupled to a path downstream of the expander, the condensation device having a container body and being configured to, within the container body, mix water vapor having passed through the expander with cooling water to condense the water vapor, and
a control unit configured to adjust an amount of cooling water supplied to the condensation device;
an air release valve in fluid communication with the condensation device and configured to control air flow out of the condensation device;
wherein the control unit is configured to, at a time of start-up:
rotate a cooling water pump to deliver the cooling water into the container body, thereby raising a level of liquid within the container body; and
actuate the air release valve such that, in response to the rise of the liquid level within the container body, non-condensable gas accumulated within the container body is discharged out of the container body through the air release valve.

10. The power generation apparatus of claim 9 , wherein the control unit is configured to:
receive data indicative of a temperature of the liquid within the container body; and
based on the received data indicative of the temperature of the liquid, rotate the cooling water pump to deliver the cooling water into the container body.

11. The power generation apparatus of claim 10 , wherein the control unit is configured to:
receive data indicative of the level of the liquid within the container body; and
based on the received data indicative of the level of the liquid, rotate a second pump to discharge liquid out of the container body.

12. A system comprising:
a power generation apparatus configured to supply water vapor to an expander, power generation apparatus comprising:
a condensation device coupled downstream of the expander, the condensation device configured to condense water vapor from the expander with liquid; and
a control device configured to:
initiate delivery of the liquid to the condenser to raise a level of fluid within the condenser; and
initiate actuation of an air release valve coupled to the condenser to enable discharge of non-condensable gas accumulated within the condenser responsive to rise of the level of the fluid within the condenser.

13. The system of claim 12 , wherein the condensation device comprises a container body.

14. The system of claim 13 , wherein the condensation device is configured to, within the container body, mix the water vapor with the liquid.

15. The system of claim 12 , further comprising a temperature sensor configured to generate data indicative of a temperature of the fluid within the condenser.

16. The system of claim 15 , further comprising a first pump configured to enable delivery of the liquid to the condenser.

17. The system of claim 16 , wherein the control device is further configured to:
receive the data from the temperature sensor; and
based data, initiate operation of the first pump to cause delivery of the liquid to the condenser.

18. The system of claim 17 , wherein the control device is configured to:
receive data indicative of the level of the liquid within the condensation device; and
based on the received data indicative of the level of the liquid, rotate a second pump to discharge liquid out of the condensation device.

19. The system of claim 12 , further comprising:
the expander;
the air release valve; and
a steam generator configured to generate water vapor supplied to the expander to drive the expander.

Assignees

• Yanmar Co Ltd

Inventors

• TOKUOKA Yuki
• Ono Taisuke
• Matsuura Takashi
• Shinomiya Masafumi
• Iguchi Takayuki

Classifications

• F01K9/00 Primary

  Plants characterised by condensers arranged or modified to co-operate with the engines (by condensers structurally combined with engines F01K11/00; steam condensers per se F28B)(F01K23/04 takes precedence) · CPC title

• F01K9/023 Primary

  Control thereof · CPC title

• F01K9/003

  condenser cooling circuits · CPC title

• F22B3/04

  by drop in pressure of high-pressure hot water within pressure-reducing chambers, e.g. in accumulators · CPC title

• F22B1/18

  the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines · CPC title